Do It Yourself Solar Energy
Register now for an intensive hands-on photovoltaic workshop beginning July 10th in Colorado. Entitled PV Design and Installation for Practitioners , this unique five or ten day program gives participants practical information on solar powered electrical systems. Former Colorado Mountain College (CMC) instructors, Steve McCarney, Ken Olson, and Johnny Weiss are now offering their training program as Appropriate Technology Associates. ATA personnel are professional designers, installers and industrial trainers in the field of renewable energy technologies. Our ATA team has been working together continuously and full-time for the last eight years. We have been involved in such projects as remote power systems, low cost solar food dryers, solar water distillation, award winning passive solar homes, commercial scale greenhouses and construction management of multi-million dollar solar projects. Home Power readers can review the feature article about our program in HP 3.
An Economics Approach to Solar Power In the coming months we will be talking about a wide variety of topics relating to solar generated electricity the PVs themselves, trackers, mounting racks, controllers, instrumentation, and how the PVs fit into the entire alternative energy system. This first solar article is about one of the most commonly asked questions about PVs. Are PVs right for me Will they work in my system. Will PVs save me money This is an economic examination of the use of photovoltaics in a small alternative energy system. In this example system the question we are asking is, Is it economical to add photovoltaics to this system Well, first we need to know more about the people using the system, how much and what type energy they are planning on using.
However, there is another power source that does not produce carbon dioxide and is renewable renewable at the beginning of each day, and pollution-free when utilized. This power source is photovoltaics, or solar electricity, the conversion of light into electricity. You may have heard the myths that photovoltaics are still too expensive, that they're not efficient enough, or that the technology is still 20 years away. Wrong. The technology to build low-cost photovoltaics is no longer on the horizon -- it's here. These solid state devices which change light directly into electricity have the ability to allow significant change to occur. At today's efficiencies a piece of desert land about 2 miles square could host a solar electric generating plant with the power production capacities of a large nuclear or coal plant. could be educated on the true economics of energy, they would realize that reducing our dependency on fossil fuels would not only slow and reverse the greenhouse effect,...
Job placement in the solar energy field, particularly in photovoltaics, has become more like job selection for graduates of the Colorado Mountain College Solar Program. And work in the photovoltaics field is leading the charge. One CMC Solar graduate recently was hired as an assistant manager in a national photovoltaic company's regional office in Denver. Three other CMC Solar graduates were hired by diversified New England solar companies that are designing, installing and selling PV systems. including catalog sales. This job success trend in photovoltaics supports the national reputation for excellence, earned by the Colorado Mountain College Solar Program. Numerous national and international publications consistently rate the CMC Solar Program and the photovoltaics division as one of the best in the nation. Since 1981 the Colorado Mountain College Solar Program has offered a unique combination of photovoltaics skills training. The strength of the program lies in combining classroom...
High-performance houses need very little heat, but a considerable amount of electricity, which is all the more significant when considered in primary energy terms. In this chapter, we assume that 1 kWh of heat from natural gas requires 1.14 kWh of primary energy, while 1 kWh of electricity requires 2.35 kWh of primary energy to produce. For this reason, it is highly attractive to consider ways of producing electricity from a renewable source, onsite. A photovoltaic (PV) system is an expensive investment, but promises trouble-free electricity production over a long life time. Figure 14.1.1 The relevance of the photovoltaic (PV) energy yield in different housing concepts Figure 14.1.1 The relevance of the photovoltaic (PV) energy yield in different housing concepts 14.1.3 Photovoltaic systems for high-performance housing Freiburg', Advances in Solar Energy, vol 9, pp1-70 M ller, J., Heinemann, D. and Wolters, D. (1998) Ecological Assessment of PV Technologies, Proceedings of the Second...
PV Systems Installation Solar Energy For International Development Solar Homes Healthy Buildings Ken Olson, principal Instructor, is formerly of Solar Energy International (SEI) and is an accredited Certified Vocational Instructor with over 25 years fulltime experience teaching practical hands-on & how-to Solar Energy.
In 1978 my wife and I set out to develop this 9 acres of land we own on top of a mountain here in Vermont, to be as near as possible, self-sufficient by the time we retire. We have constructed a 65 foot tower on top of which we have put a 450 watt, 12 volt DC windmill. Also we have built, as a back-up charging unit, a 12 volt DC alternator, designed our own control panel that feeds 2 separate battery packs. We also have a commercial built AC generator which we start up approximately once a week to do our washing, vacuuming, etc. We hope very soon to add solar panels for charging these batteries also. We have pure mountain spring water, gravity fed into our home. We also built our own compost toilet and garbage disposal. We heat our place with firewood cut from our own land, in a stove we built from 2 oil barrels which utilizes a catalytic combustor. We have set out fruit and nut trees, a variety of berries, grapes and of course we grow our own garden for vegetables. Any project...
Me the ability to power AC electronics off the solar panels. The boom box was the only load that got consistent use besides the motor. I found pedaling to the rhythm of my personal music selections to be blissful it made riding even more enjoyable than it already was. I am starting a small business selling solar trikes and trailers over the Internet. Initially, I am focusing on the solar-powered recumbent tricycle. Rather than having the PV canopy over the trailer, as my first solar cycle had, the PV is over the trike, providing shade and rain cover. Recumbent trikes have two wheels in the front, and because they are very low to the ground, they are incredibly stable. Like the solar trailer, the solar trike is also a contained and mobile power station. Solar Energy International, PO Box 715, Carbondale, CO 81623 970-963-8855 Fax 970-963-8866 sei solarenergy.org www.solarenergy.org Solar powered or AC
Here are some arguments in favor of using renewable energy sources to produce our electricity. 1. The development and use of renewable energy resources makes good solid financial sense. If the real costs (including environmental clean-up costs) of commercial power are considered, then the renewable alternatives are cheap by 2. The development and use of renewable energy sources is politically good for the country. Renewable sources reduce our dependence on foreign energy supplies. 3. Renewable energy sources are good for our environment. We have already demonstrated the clean nature of solar, microhydro, and wind power. Only these types of sources now offer us long term, non-polluting, energy. 4. Research and development in renewable energy will produce spin-off technologies that will benefit every lifeform sharing our fragile environment. For example, consider solar powered water pumping for arid areas. We can use these arguments on Senators, Congressmen, or any elected official...
Solar Energy The Power to Choose American Institute of Architects American Society of Heating Refrigerating and Air Conditioning Engineers American Society of Mechanical Engineers American Solar Energy Society Interstate Renewable Energy Council National Association of Home Builders Solar Energy Industries Association Sustainable Buildings Industry Council Utility PhotoVoltaics Group American Solar Energy Society 2400 Central Avenue, Suite G-1 Boulder, CO 80301 Phone 303-443-3130, Fax 303-443-3212 E-mail ases ases.org,Web site www.ases.org Dear Mr. Perez, Over the last few years that I have been studying residential renewable energy projects, I have noticed an interesting trend people always seem to crave more energy. Once a system is installed, people seem to fantasize about more solar panels or more battery capacity. I assume that since the energy is green, people feel justified in running as much stuff as they can.
Ill and Carol Hoover live in a remote California mountain canyon, isolated from the hubbub of city streets and highways. Their concrete house is cut into the canyon wall, overlooking a stream and pond. Wildlife regularly visits this sanctuary, especially deer, raccoon, wild pig, and bird life of all sorts. The Hoovers' home has been independent of the utility grid since it was built. They chose renewable energy sources to avoid ugly and expensive power lines intruding into the canyon. In trying to cool the house, the Hoovers tried some portable swamp coolers. These helped some, and for more improvement, they changed to window-mounted swamp coolers powered by Siemens solar panels. These worked just well enough to be teasers. The water source had enough mineral salts to rapidly build deposits (mostly magnesium). Maintenance was a problem, so they decided to search for something better. In 1998, Bill came to me asking about air conditioning. For several years, I have been his consultant...
A car designed & built by Dartmouth College students will compete in the 4th annual running of the Tour de Sol, a 6 day race for solar powered vehicles from Zurich to Lausanne, Switzerland, ending July 3, 1988. The PVs for the vehicle are standard models from Heliopower, Inc., Piscataway, NJ. Call 201-980-0707 for more info.
GUERRILLA SOLAR The unauthorized placement of renewable energy DATE December, 2 000 LOCATION Somewhere in the USA INSTALLER NAME Classified OWNER NAME Classified INTERTIED UTILITY Classified SYSTEM SIZE 476 watts of photovoltaics, 130 watts grid-intertied PERCENT OF ANNUAL LOAD 40 TIME IN SERVICE 6 months
Apr. 16-21, '01 PV Design & Installation, Ashokan Field Campus, Woodstock NY. Solar site analysis, system sizing, equipment, appliances, demonstrations, lab exercises, & hands-on installation. US 550. Solar Energy International (SEI), PO Box 715 Carbondale, CO 81623-0715 970-963- 8855 Fax 970-963-8866 sei solarenergy.org www.solarenergy.org Housing & logistical info Larry Brown, Sun Mountain, PO Box 1364, Olivebridge, NY 12461 914-657-8096 Apr. 21, '01 6th annual North Country Sustainable Energy Fair, Canton Middle School, Canton, NY, 10 AM. Tours of solar homes April 22. Keynote by Ed Smelloff of Pace Univ., formerly of Sacramento Municipal Utility District. Workshops and exhibits on RE production & conservation. Child care. Contact Scott Shipley 315-386-4928 shipleyscott hotmail.com www.ncenergy.org
Apr. 23-28, '01 PV for Ecovillages workshop. Basic PV for the off-grid home. Lectures, labs, & hands-on instruction. Eco Village Training Center at The Farm in Summertown. US 550. Camping & lodging available. Solar Energy International (SEI), PO Box 715, Carbondale, CO 81623 970-963-8855 Fax 970-963-8866 sei solarenergy.org www.solarenergy.org
Solar-electric (photovoltaic) pumping systems provide a welcome alternative to fuel burning generators, cumbersome windmills and hand pumps. A solar pump is alot like a windmill, which fills a tank when the energy is available. The BIG difference is that solar pumps don't slow down in summer, when winds are low. They provide the most water precisely when it is needed the most -- when the sun shines the brightest Solar pumps are simple to install and maintain. The smallest systems can be installed by one person in a couple hours, with no experience or special equipment required. While multi-national corporations commit massive resources to developing photovoltaics, small companies and private inventors are putting PV power to use in small-scale, appropriate applications. Special water pumps required for solar use are among these innovations. Solar power differs fundamentally from conventional electric or engine-powered systems, so solar pumps often depart from the conventional. PV...
Colorado Solar Energy Industries Association (CoSEIA) New Product Exposition and Annual Meeting. 11 AM to 5 PM. CoSEIA, 2170 S. Parker Rd., 255, Denver, Colorado 80231 303-750-9764 Fax 750-0085 Carbondale, CO. SEI hands-on workshops. 1 & 2 week sessions. PV design & installation, advanced PV, wind power, microhydro, solar cooking, environmental building technologies, solar home design, & straw bale construction. Experienced instructors & industry reps. US 550 week. Solar Energy International (SEI), PO Box 715, Carbondale, CO 81623 970-963-8855 Fax 970-963-8866 sei solarenergy.org www.solarenergy.org
Feb. 12-17, '01 Line-Ties and More workshop, Sacramento. Basic PV for off-grid applications & utility line-ties. Lectures, labs, tours, & hands-on installation. Co-sponsored by NCSEA& Sacramento Municipal Utility District. US 550. Solar Energy International (SEI), PO Box 715, Carbondale, CO 81623 970-963-8855 Fax 970-963-8866 sei solarenergy.org www.solarenergy.org
Mar. 5-10, '01 PV for Park Services workshop, Phoenix. Basic PV for off-grid applications. Focus on national park public land applications water pumping, gate entry systems, restrooms, etc. Lectures, labs, & hands-on components. US 550, camping available. Co-sponsored by AZ Dept. of Commerce Energy Office & Tonto National Forest District. Solar Energy International (SEI), PO Box 715, Carbondale, CO 81623 970-963-8855 Fax 970-963-8866 sei solarenergy.org www.solarenergy.org August 8-10, '01. Flagstaff, Arizona. Third annual Southwest Renewable Energy Fair. To be held at the NAU campus in conjunction with a national RE conference. Greater Flagstaff Economic Council, 1300 South Milton Rd., Suite 125, Flagstaff, Arizona 86001 800-595-7658 or 520-779-7658 Fax 520-556-0940 swref gfec.org www.gfec.org Glendale & Scottsdale, AZ. Living with the Sun Lecture series by AZ Solar Energy Assoc. Save money & the environment. History & current overview of concepts, design, applications, &...
April 2-7, '01 Solar, Wind, & Water Power For Off-Grid Living Lasqueti Island, BC. Site analysis, system sizing, equipment, appliances, lab exercises, & tours of local systems. US 550. Solar Energy International (SEI), PO Box 715, Carbondale, CO 81623-0715 970-963-8855 Fax 970-963-8866 sei solarenergy.org www.solarenergy.org Local housing & logistics Melinda Auerbach, Morewater Road, Lasqueti Island, BC V0R 2J0 Canada 250-333-8898 Fax 250-333-8670 melinda lasqueti.net
Mar. 14-16, '01 Greenprints 2001, Sustainable Communities by Design Conference & Green Trade Show. Building solutions, high performance building design, clean energy, & sustainable community development. Westin Peachtree Plaza & AmericasMart, downtown Atlanta. Info www.greenprints.org Sponsorship marci southface.org Exhibitor mstar greeprints.org 404-325-1007
Renewable Energy Terms What does it mean when you read that a renewable energy generating source is rated at x watts Well, that depends on the device. This term can be pretty confusing. If you're looking at photovoltaic (PV) panels, they are rated at 1,000 watts per square meter (full sun), at 25 C (77 F), and at their maximum power point. Since this point is where the voltage is generally at 17 or 18 volts, and your system voltage will be 12 to 15 volts, it doesn't represent what you'll get out of your PV panel in a battery-based renewable energy system. The real-world temperature of a PV panel in operation can be 45 C (113 F) or higher. Since PV output drops in higher temperatures, the rated output can be even more misleading.
We do hear all of you who are complaining about the Third Class service that the US Post Office offers. Well, the USPO considers Home Power advertising junk mail. As such, Home Power moves last, is not forwardable, and can be trashed if the Post Office has trouble delivering your copy (imperfect address or whatever). We tried to get Second Class magazine mailing status from the Post Office, but were refused because our parent company (Electron Connection) is in the renewable energy business. So if we want to distribute Home Power free, there is only one avenue-Third Class mail. bucks you get faster, more secure, forwardable delivery of your year's issues (also with address correction should you move and forget to tell us). And you help Home Power spread the word about renewable energy resources. If you want to help out Home Power, if you feel that HP's info is worth something, or if you just want your copy quickly & securely, then First Class Home Power is for you. One more thing, if...
Ceramic tile performs as an energy saver, as well, retaining heat and emitting It slowly, for efficient building climate control. Partnerships with Spain's pioneers In solar energy have resulted In a patented system of photovoltaic facades. Tiles clad with solar cells actually produce energy year round. Ventilated facades - photovoltaic or not - create a thermal barrier between building surface and tile, conserving energy, and reducing heating and cooling costs and noise pollution.
Before acknowledging this year's winners, we'd like to take a moment to thank our judges Lee Durston, building scientist at BCRA in Tacoma, Wash. Dan Heinfeld, senior principal and president of LPA, in Irvine, Calif. Dan Rockhill, J. L. Constant distinguished professor of architecture at Kansas University in Lawrence, Kan. and Paul Torcellini, commercial building research group manager at the National Renewable Energy Laboratory in Golden, Colo.
The Solar Heating and Cooling Programme was one of the first IEA implementing agreements to be established. Since 1977, members have been collaborating to advance active solar, passive solar and photovoltaic technologies and their application in buildings. 5 Use of Existing Meteorological Information for Solar Energy Application 14 Advance Active Solar Energy Systems 15 Photovoltaics in Buildings 19 Solar Energy in Building Renovation 22 Optimization of Solar Energy Use in Large Buildings 34 Photovoltaics Thermal Systems
This is the second water-powered tracking system I have built. I first came up with the idea several years ago after installing my first solar powered pumping system on another, very low-producing well. I mounted a single 50 watt PV panel on a fixed mount, figuring this low-powered setup would approximately match the well's low water production. The well turned out to produce more water than the solar-electric system could extract each day. So I looked at using a tracking mount to boost pump output.
Millwork Skyblend, Certified Wood Products, Dan Haugen, certifiedwood.net Paints and finishes Pure Performance, Zero VOC, PPG, corporateportal.ppg.com ppg Pavers VAST Enterprises, vastpavers.com Photovoltaics and solar domestic hot water Westwood Renewables, westwoodrenewables.com Spruce Line 195W, Outback inverter and batteries, Evergreen Solar Panels, evergreensolar.com Solar hot water Solar Skies flat plate collectors, solarskies.com Rheem Soleraide HE tank, rheem.com Caleffi pump, Caleffi Hydronic Solutions, caleffi.us Plumbing and water systems Astracast, astracast.co.uk Toto, totousa.com Grohe, grohe.com Roofing Fully adhered membrane roofing, Firestone UltraPly TPO, firestonebpco.com roofing tpo ultraplytpo
Solar energy travels through the windows of a building, increasing the energy used by air conditioners and degrading occupant comfort. An ideal passive solar building minimizes internal energy use by optimizing its design to suit the annual path of the sun and the local climate. A primary goal in energy-efficient design for buildings in warm climates such as Shenzhen is that they must minimize solar heat gain during much of the year. Based on solar energy calculations for each window direction (north, south, east, and west), recommendations were made regarding optimum window shape and orientation, as well as shading options. The passive design incorporated knowledge of the sun's path, including sun angles during different days and azimuth angles (sun-path from a bird's-eye view) throughout each day of the year. Figure 6 shows elevations at noon on three dates for Shenzhen (latitude 22.18 N), and Figure 7 shows azimuth angles for Shenzhen throughout the day on those dates. In addition...
Photovoltaics Photovoltaic Fortum NAPS 20 Wp 16 EB DC It was important to our educational mission that the systems were varied. Using different components gave the students an opportunity to see different designs, and using local batteries is probably the way most small solar home systems will be installed in the future in Somalia. It is the local business and NGO community that will help solar power fill the niche that it can sustainably occupy in Somalia. For this group to gain information about viable solar applications, a strong effort needs to be made to train Somalis. With partners like Horn Relief, EAA continues to help develop the Somali solar infrastructure. Much more needs to be done. Please contact us if you are interested in participating.
12 VOLT WASHING MACHINE In response to A.L.'s letter in 8, we offer a solution. We have produced an AUTOMATIC WASHER CONVERSION KIT since 1983, for both 12 and 24 volts. It adapts Kenmore and Whirlpool washers (only). 120 vac power is required to run the timer and controls, but the smallest available inverter (100 watt) can handle that. The big job of running the machine is handled by a high efficiency DC motor. This eliminates the need for a 2000 watt inverter, and uses much less energy too (average 25 amps at 12V). The kit is pre-wired and simple to install. A similar conversion is available for gas driers. Thank you for being the finest source of user information in the field We are proud to contribute articles to the cause. Windy Dankoff, Flowlight Solar Power, Santa Cruz, NM. I'm going to spread the word about your publication in our anchorage. At least a dozen wind generators here, photovoltaics are growing, but not efficient yet (size constraints). We also need support for...
With study, ingenuity and determination, the sun's energy may serve many of our needs. Technologies to capture the winds and radiant solar energy are emerging. However, there is no assurance that the use of solar energy will create order on the earth. For millions of years, fires on prairies and forests alike have been started by lightning from sun-driven storms. The magic sun has repeatedly converted prairies and forests into a disordered scattering of ashes. The sun can work its magic for man, but it comes with no guarantees, only opportunities.
Several manufacturers are now marketing devices that promise to triple current output from a PV panel. These linear current boosters (LCBs) help eliminate the need for storage batteries or oversized arrays when running electric motors directly from the panels. Is this magic or simply alot of hype Actually it's neither. In keeping with Home Power's philosophy of delivering accurate and useful information on new renewable energy products, these devices were tested and their performance documented. The following article explains their operation and gives the facts and figures in how well they perform. When photovoltaic panels are connected to storage batteries, the match between load and source is pretty close to ideal. The panel is able to deliver close to maximum available power over a wide range of solar intensity, current, and voltage. It is only when PV panels are called on to power electric motors directly that a poor match takes place and we find that the panel is unable to...
These components were selected to provide the most cost effective power for Roger and Ana. A renewable energy system is more personalized than a pair of shoes. One size does not fit all. This set of components is a specific match for their energy requirements, site and lifestyle. A system for different folks in a different location would have different amounts and types of equipment. A renewable energy system's success or failure depends on the amount and quality of the planning done before a single piece of hardware is ever purchased. Consult an individual or company with the experience necessary to see that you get the system you require without spending more than necessary. Power Sources- Photovoltaics (PVs) & Engine
FLOWLIGHT SOLAR POWER is a leading supplier of independent electrical systems by mail order. Please call or write for details on pumping or home power. To deal with the three bigs we must develop exsisting renewable energy technologies. We must investagate promising edge level processes. We must discover new physical and biological systems for energy generation. the free lunch is around the corner. Let's turn that corner.
We've been telling you that photovoltaics last a long time. Well, here's living proof that PVs can handle the LONG haul. This venerable PV panel has been in the sun for more than 10 years and still produces more than its rated output. Amazingly enough these silicon marvels don't seem to wear out. In the Spring of 1977 the US Energy R&D Administration spent one million dollars on a PV powered irrigation project in Mead, Nebraska. This venture was conducted by Lincoln Labs of MIT and the University of Nebraska-Lincoln. Their goal was to pump over 700,000 gallons of water daily using PV produced electricity. The system employed 100,000 photovoltaic cells costing 22 per Watt in 1977. The resulting array produced 25kW during peak sunlight periods. Very few things in this Life offer the steadfast reliability and performance of photovoltaics. Lifetimes of energy from the Sun Use PVs and will them to your children and your children can will them to their children and. RP SOLAR POWER
Practically any seacoast and many desert areas can be made inhabitable by using sunshine to pump and purify water. A 10 gallon day solar still now purifies sea water for drinking, cooking and other household needs for a residence near George Town, Exuma, in the Bahamas. Solar energy does the pumping, purification, and controls seawater feed to the stills. level support, are also available. A photovoltaic panel powers the pump filling the salt water reservoir. The water comes from a well about 10 feet deep in limestone rock. The well's bottom is about a foot below sea level. Some rain water mixes in, but it is mostly sea water, well filtered by the 50' or so of sand between the sea and the well. Good filtration is imperative to keep the pump running dependably. Dropping a hose into the sea with a screen over it is not adequate. WASHINGTON STATE'S ONLY RENEWABLE ENERGY STORE Purify your water with Solar Energy
The conversion factor will hopefully improve in the near future as conventional sources of primary energy are increasingly replaced by renewable sources. The growth rate of all renewable energy sources together has been anticipated to increase to about 25 per cent of the total energy production by 2020. Yet, even if this ambitious goal is reached, the amount of renewable energy available will still be limited and prices for electricity can be expected to rise. So there is a strong argument that electricity is and will continue to be too valuable to be 'burned' merely to produce low temperature heat
The multiple decks and terraces of architect Ray Kappe's exploded box design (right) expand living space by extending it outdoors. Drought-resistant native plantings add vibrancy while requiring little water or maintenance. Photovoltaics integrated into awnings and attached to trellises (above) collect solar energy while helping provide shade. Active solar technologies include a 2.4-kW rooftop solar array linked to a battery storage system that generates 60 percent to 75 percent of the home's electrical power. A solar water heater (also situated on the roof) serves the radiant floor heating and domestic water systems, and some of the solar panels double as awnings to shade roof decks.
Dana Raydan trained as an architect in the Lebanon and the UK. Her research at the University of Cambridge was into the potential of renewable energy in urban environments, a subject on which she has published widely. Dana combines architectural practice in London with teaching and research.
We've been busy compiling the survey data that comes in with your subscription forms. We thought all of you might be interested in a look at what we're doing with renewable energy, what we're planning on doing, what equipment we now use, and what equipment we are planning on using. We began collecting this data in November of 1987 and here is an update as of 26 March 1989. Feel free to add your data to this survey by using the subs form on page 23. Renewable Energy Use - NOW Renewable Energy Use - FUTURE Renewable Energy Usage Renewable Energy Resource Potential Renewable Energy Equipment Usage
Within the awards, the Green Power Purchasing category recognizes partners who distinguish themselves through purchases of green power from a utility green-pricing program, a competitive green marketer, or a renewable energy certificate (REC) supplier. Among the 10 award recipients in this category are several companies in the building, design, and construction realm including to 280 million kWh of green power. The company donates its scrap wood and sawdust and plans to install on-site solar photovoltaic panels on its facility by 2012.
A net-zero energy house produces as much renewable energy as the house and its occupants use. It is a concept that was almost unthinkable just a few years ago. Because solar resources in Boulder are so plentiful, we incorporated both a solar photovoltaic system and a solar thermal system in the design of the house. Boulder has more than 300 days of sunshine each year, and the state of Colorado offers generous rebates for solar photovoltaic installations. Through rebates, the state paid for more than half the cost of our 7.2-kilowatt PV array. To save the cost of a battery system and to qualify for the substantial rebates, the PV array was net-metered and tied to the grid. This allows the home to feed from the municipal electrical grid when it is not producing enough energy, as at night or on cloudy days. A net-meter runs both backward and forward at the end of the year if the house puts more into the grid than it takes out, we will be paid for that energy by the utility.
Earth's population increases and our cities grow, we need to ensure we have the models in place to sustain our way of life in an increasingly urbanized world, says former president William J. Clinton. The Climate Positive Development Program will set a new global standard for developments that will minimize environmental impacts and benefit economies as we build and rebuild homes, schools, and businesses. Property developers and local governments will partner on initiatives including implementing economically viable innovations in building generating clean energy waste and water management and outdoor lighting systems. When the initial 14 projects are completed, nearly 1 million people will live and work in the communities. For more information, visit www.clintonfoundation.org.
Each project has its own distinct features. While one architect focused mainly on finding and demonstrating an economical solution on how to construct a Passivhaus building, the others strived to develop sophisticated energy concepts, optimizing ecological aspects or integrating solar technologies within the building design.
Collaborative programmes in the various energy technology areas are conducted under implementing agreements, which are signed by contracting parties (government agencies or entities designated by them). There are currently 42 implementing agreements covering fossil-fuel technologies, renewable energy technologies, efficient energy end-use technologies, nuclear fusion science and technology, and energy technology information centres.
Alternative Energy Engineering - 2 Bobier Electronics- 14 Drag-A-Mouse - 37 Electron Connection - 30 Energy Depot- 22 Energy Tech- 14 Flowlight Solar Power- 17 Heliotrope General - 33 Home Power Magazine - 38 Kyocera America - 29 Mercantile Ads - 47 & 48 MicroAds - 46 Photocomm- 42 Ramona Works - 15 Real Goods Trading Co. - 42 Sacks Securities - 41 Trace Engineering -15
Pittsburgh Corning has expanded its LightWise Architectural Systems to include energy-efficient glass-block panels. Each block features a low-E coated glass panel that filters out most solar energy, helping to lower heating and cooling costs. It has an insulating U-value of 0.34 unframed (0.38 framed) and is available in prefabricated, graffiti-resistant systems with a range of visibility and privacy options. (800) 624-2120 www.possibilitiesbegin.com CIRCLE NO. 86 ecostructure.hotims.com
This means of energy storage is superior to all the above means. The classic example is petroleum. Solar energy has been stored in plant material, which decomposed into oil, and now millions of years later, with no energy loss during the storage, 10,000 kWh m3 can be released by simply burning it -an incredible energy density. The only small problem is that the rate of use exceeds the rate of geological production, given the millions of years' time span
The storage need in a solar system is often determined by the ratio of the maximum to minimum monthly solar radiation. Figure 13.1.2 gives this data for different latitudes. When the maximum-minimum ratio is less than 5, even wintertime solar energy may be enough to provide the heat load, whereas values higher than 10 mean such a large fluctuation that a seasonal storage or
Geothermal heat can be used to generate electricity and heat but the geology of Central Europe limits its application for heating purposes. In spite of its huge energy potential, this environmentally friendly technology is currently only rarely used. In comparison to solar energy that reaches the Earth (5.4 x 1015 MJ a), the terrestrial heat flux through the Earth's crust is nearly 6000 times smaller (1012 MJ a). This is, however, still three times greater than the total worldwide energy consumption.
In high-performance houses, while the heat demand is reduced to a very low level and occurs during only a few months of the year, it does not decrease to zero. Certainly, a significant part of the space heating and major part of the hot water demand can be covered by solar energy. However, to cover 100 per cent of the demand would be economic nonsense. Such a system would be grossly over-dimensioned most of the year, having to dispose of heat. A backup heating system to cover the peaks is essential. Burning a fossil fuel is a proven means of providing this backup. Due to the small absolute quantities of fuel consumed, the environmental impact is negligible. Especially in high-performance houses, the following should be considered
Heating DHW with solar energy in a high-performance house is sensible. In such houses, the energy needed to heat domestic water can equal or even exceed the energy needed for space heating since the latter has been so far reduced by insulation and heat recovery. Furthermore, demand for heating domestic water is a 12-month energy demand, including the high insolation summer months. Using a solar system is therefore an effective way of reducing the total primary energy demand. Increasingly, the market for solar water systems also includes systems that provide, in addition to water heating, space heating in winter.
A lawnmower powerplant just to equalize their batteries. The very nature of wind and solar energy makes it very difficult to equalize the batteries without such a motorized power source. This generator makes excellent backup power for times when Mother Nature isn't cooperating with our energy demands. To understand our increasing need for renewable energy, we must know that our future lies not in the hands of those who abuse, but in the hands of those who efficiently use our valuable resources.
As shown in Table 2, solar gain through windows accounts for approximately 40 percent of the total cooling energy load for a base case unit in Shenzhen. Over a year, the energy from direct sunlight per area incident on all building surfaces (north, south, east, and west) totaled nearly 2.53 MWh 2. Northern windows received 3 percent of the total direct annual solar energy per area, while southern windows received 33 percent, and western and eastern facing windows each received 32 percent (64 percent combined). As a result, it was desirable that building designs minimized western and eastern exposures in order to maximize energy-efficient designs. Recommendations for window design in Shenzhen follow in the next several paragraphs.
For solar wall heating and solar insulation, the same methodology can be used for characterizing the wall construction. The U-value can be calculated according to ISO 6946 (EN ISO 6946, 1996). In general, the wall construction is an inhomogeneous building element consisting of wall material, transparent insulation product and frame part. Similar to a window, the solar gains are proportional to a total solar energy transmittance (g-value) of the complete system gSWH - or, in collector terminology, a solar efficiency nSWH. The basis for the determination of this parameter is the thermal resistance network of Figure 9.4.6 the solar energy transmitted is proportional to the g-value of the transparent insulation gTI and the relation of the resistance from the wall surface to the exterior Rtii + R to the total resistance R
After space heating and cooling, the largest user of home energy is usually the hot water heater. Fortunately this energy drain can easily be reduced with only moderate expense. Some people seem to think that solar hot water was a 70's fad, and faded with the times. Not true Solar hot water was very popular in the Los Angeles area in the early 1900's, and disappeared only when the hot water heater manufacturers gave people free gas and electric hot water heaters in exchange for their old-fashioned solar units, assuring a perpetual market for their supplies of then cheap gas and electricity. Well, it may have made sense back then, but one quick glance at our utility bill tells us that we've been had. A family of four often spends 50 per month or more to operate their electric hot water heater. Solar energy is presently making hot water for thousands of people all over the world, many in climates where sunshine is limited. Solar hot water does not have to be complicated or expensive. A...
O Last October, Julia Hamm, executive director of Washington, D.C.-based Solar Electric Power Association, challenged solar and utility industries to deploy solar power on a massive scale despite new economic barriers. SEPA recently issued a report demonstrating the industry has responded. The 2008 Top Ten Utility Solar Integration Rankings report identifies those utilities in the U.S. that have the most significant amounts of solar electricity integrated into their portfolio and records the increased collaboration of U.S. electric utility and solar energy industries. The overall installed solar capacity of the Top 10 ranked utilities rose from 711 megawatts to 882 megawatts, reflecting a 25 percent growth since the challenge was issued. Ninety-two utilities participated in this year's survey. Renewable portfolio standards, impending carbon policy, and fluctuating costs of power generation and fuel resources top the list of drivers towards improved perception of solar electric...
Sustainable features of the homes include solar power, geother-mal heating and cooling systems, tankless water heaters, Energy Star appliances, and efficient lighting. The homes also include storm-resistance features such as 5-foot or 8-foot elevations to protect the structure from flooding impact-resistant glass or hurricane fabric to protect windows rooftop access and mold-free paperless dry wall.
Others are about quality of life and the ability of people to live together without alienation. At the qualitative building level, the design team at MIT sought design solutions where the housing can be far more energy efficient, principally through the reduction of air-conditioning and improvements in the design of the building fabric, to reduce carbon dioxide emissions through the dependence upon climate-destructive energy sources such as coal-fired power plants, and to maximize the use of natural ventilation and solar energy for daylighting and winter heating. At an urban scale, we sought to develop plans that were more ecologically responsive in relation to water conservation and retention, wind patterns in and around buildings, and to landscape space that built a sense of community. However, rather than developing a design that might contain a large palette of available sustainability techniques, we sought to develop an understanding of those that would work best, that would be...
The 48 single family houses in the southern tract have a micro-district heating system per house row. Solar heat and electricity produced on the house roof tops are also centrally collected and distributed. Solar energy also covers 65 per cent of the DHW need. These central units are managed by the local utility.
Encouraging the use of energy-efficient appliances requires that standards be introduced and that consumers are aware of energy efficiency. Several energy efficiency programs have been introduced in China to date, with mixed success.The China Green Lights program addresses two major barriers to reform, the high initial cost of efficient technologies and poor quality of some of the products manufactured in China. Screw-in compact fluorescent lights have been observed to fail very prematurely, negating the life cycle savings and losing consumer acceptance. The CFC-Free Energy-Efficient Refrigerator Project aims to improve the energy efficiency of Chinese refrigerators through a series of
Team Germany's surPLUShome (left) took first place in the U.S. Department of Energy's 2009 Solar Decathlon. The competition pitted solar-powered homes designed and constructed by 20 student teams (16 U.S. teams and four foreign teams) against one another in 10 competitions from Oct. 9-18, including architecture, market viability, engineering, lighting design, communications, comfort, hot water generation, appliances, home entertainment, and net metering.
We can look at the relatively inexhaustible resources which are available to us right now. If these can be effectively harnessed we will be all right energy wise for at least a million years. Two of these, wind and water, have been used for many years as energy saving and energy creating systems. These will be here as long as the Earth survives. Another, solar, will be around even longer. It is the opinion of many intelligent people that with proper technological engineering these three sources alone could provide all the energy that human society needs. Solar energy is also the best bet to power many extraplanetary ventures.
I've studied and researched fuel cells and hydrogen for several years, and I find them fascinating and technically challenging. It was always frustrating to learn only from books, without any hands on experience with real equipment. This lead me to create KATTEL (Klamath Advanced Transportation Technology and Energy Lab), a nonprofit organization dedicated to advancing renewable energy, with special emphasis on fuel cells and hydrogen. We offer all services free of charge. Recently, legislation was passed to establish the Oregon Renewable Energy Center on campus. This fall, OIT will offer bachelor's degrees in engineering with emphasis on PV, fuel cells, and other renewable technologies.
Roger and Ana decided to investigate alternatives to commercial power. They contacted their neighbors at Electron Connection and together we specified and installed a self-contained electrical system. The first step in any renewable energy system is a thorough survey of how much and what kind of electricity is needed. And this is where we started with Roger and Ana. Roger and Ana Murray decided early on to use only very efficient appliances within their system. And they decided to practice the cardinal rule of energy conservation, Turn it OFF if you aren't using it. As such, their electrical power consumption is much smaller than the average household. Their choices of appliances represents the same compromises every user of renewable energy faces.
Energy use was a specif i c focus for the center, which was designed to produce more than 110 percent of its annual energy needs. Program spaces are purposefully disconnected from the main building to reduce energy loads (above). A 39-kWh solar photovoltaic array on the roofs (right) produces more than 61,000 kWh of electricity annually. The roof design bounces natural light into the interiors, reducing the need for electric light, while the overhangs are constructed to shield sun in the summer and allow passive gain in the winter. In addition, rainwater is collected from the roofs (far right) and water for the buildings is preheated by a roof-mounted evacuated tube solar array. Long, narrow floor plates allow optimum natural ventilation and daylight, and the building overhangs are designed to shield sun in the summer and allow passive gain in the winter. Geothermal radiant heating and cooling also contribute to mechanical efficiency, while a 39-kWh solar PV system produces more than...
Solar Energy Industries Association (SEIA) Energy Efficiency and Renewable Energy Clearinghouse (EREC) P.O. Box 3048 Merrifield, VA 22116 E-mail doe.erec nciinc.com Fax (l03) 893-0400 TDD (800) 2l3-295l BBS (800) 2l3-2955 (800) DOE-EREC (363-3l32) www.eren.doe.gov erec factsheets
DC ELECTRICAL EQUIPMENT- Wind Generators, Kits, Towers, Photovoltaics, Controls, 36VDC Garden Tractors Lawn Mowers, Snow Throwers, Welders, Chain Saws, Tillers, Tools, Grain Mills, Relay, Motors, Water Pumps, Fans, Water Heater Elements (12v to 36v), Inverters, Refrigerators, Freezers, Solar heaters. Used Equipment Best Inverter 32v, 3000W, 12,000W surge, with load demand 895, save 1653. 1512 Trace inverter with options- a real bargain. 200w Wincharger 395. NiCad Batteries 1. Sparco Wind Powered Water Pump, 48 gph at 10 mph. 200 watt WhirlWind System, 12' Blade, 120 vdc 990, save 2100. 4000w Induction Generators 120. Diatomaceous Earth- Non-toxic Insecticide. Hydrogen Peroxide makes plants and animal grow better, kills AIDS virus, info 2. Equipment catalog 3. Kansas Wind Power, Route 1, Dept. HP, Holton, KS 66436. Phone 913-364-4407. Since 1975. SOLAR ELECTRIC POWER PROVIDES HOME COMFORTS beyond power lines. Our home and business solar powered ten years Get our 42 page information...
JACOBS, BERGEY, WHIRLWIND, and WINCO Wind Generators, Kyocera Solar Systems, Trace Inverters, Towers, Batteries, Portable Generators, 12 Volt Converters, Pumps, and Light Fixtures. *We Build Custom-Built Wind and Solar Powered Homes. Built-Rite Construction, R.R. 3 Box 48, Ligonier, IN 46767. COMPLETE SOLAR ELECTRIC POWER SYSTEMS. We offer the EchoLite photovoltaic power package designed to provide modular components for easy installation, secure mounting and quick access. Perfect for remote sites, homes, RV's & marine applications. Free Brochure. Sunwater 219 Van Ness Ave. Santa Cruz CA 95060 408 423-2429 ENERGY SPECIALISTS Best Published Prices Anywhere. We carry a full line of ARCO Photovoltaic products, inverters, energy efficient appliances, Yamaha generators as well as hydro-electric equipment. SPECIAL Solavolt, 9 watt panels, fully warranted, 80.00 plus tax & shipping. For your energy needs whether it be starting a system or expanding your existing power, contact us at area...
Whether you're just beginning to use solar electricity, or adding to a system, choosing Siemens Solar modules assures you of the exceptional performance, precision quality and proven reliability that have made Siemens a leader in photovoltaic energy. Your Siemens Solar PowerPro Partner has the information, experience and products you need for effective and economical solar power solutions. Applied Power Hitney Solar Hutton Communications Inter-Island Solar Soltek Solar Energy SunWize Technologies Talley Communications
To design naturally ventilated buildings and or comfortable outdoor environments, the first step is to obtain reliable wind information, such as wind speed and direction. For example, the National Renewable Energy Laboratory derived a set of typical meteorological weather data for 229 stations throughout the United
I have been a renewable energy buff since the 1974 energy crisis. Windmachines for generating electrical power always fascinated me. In 1974, I bought a 200 Watt 12 Volt windcharger and installed it on a 35 foot steel tower. It generated a small amount of power for the house. At the time, I had 5 24V aircraft 35 Ampere-hour batteries (wired in series to produce a pack of 130 VDC). The batteries fed a 1kW. rotary converter, 130 VDC in and 120 vac out, which ran the house. The 12V output of the wind charger fed a 12V to 120V, 150 watt Tripplite inverter which in turn fed a rectifier driven by a small auto transformer to boost the voltage up high enough to charge the 130V battery. Photovoltaics & Tracker I made a device this past summer called a maximizer which boosts the voltage output of the solar panels about 15 . It makes use of the solar panels ability to produce higher voltage when they are cool. I use two electronic Ampere-hour meters from Natural Power in my system, one measures...
We had forgotten the 9th, more distant house until the last week. Bill located a battery in town and we set up a shuttle system to the charging station. The following month, Dave Katz of Alternative Energy Engineering went down with solar panels and but that's another story. Many people have access to some form of running water and are wondering just how much power, if any, can be produced from it. Almost any house site has solar electric potential (photovoltaic). Many sites also have some wind power available. But water power depends on more than the presence of water alone. A lake or well has no power potential. The water must be FLOWING. It also must flow from a high point to a low one and go through an elevation change of at least three or four feet to produce useable power. This is called the head or pressure, usually measured in feet or pounds per square inch (PSI). The flow is measured in gallons per minute (GPM) or for those blessed with larger flows, cubic feet per second...
My Harris microhydro turbine and photovoltaic panels survived. My system differs from Harry O. Rakfeldt's in that I have a high flow (minimum of 105 gpm), low head (50 feet) system, where water is diverted on BLM land from a spring-fed creek and flows a quarter mile to an irrigation reservoir on my property through a four inch pipeline. The turbine is at the end of the pipe. The lights have not replaced the candles completely as we still love the soft glow of candles. There is obviously a place for both forms of energy. Our 13 year old son, with a mischievous glow in his eye, suggested placing an array of candles in front of the solar panels. Another alternative to a wind, hydro or generator back-up system, if you will. Leo Morin who advertises in your publication as Free Energy Options gave very generously of his time in answering my many questions and helping me understand alot of the basics of photovoltaics. I would recommend him without reservations to anyone contemplating energy...
COMPLETE SOLAR ELECTRIC POWER SYSTEMS. We offer the EchoLite photovoltaic power package designed to provide modular components for easy installation, secure mounting and quick access. Perfect for remote sites, homes, RV's & marine applications. Free Brochure. Sunwater 219 Van Ness Ave. Santa Cruz CA 95060 408 4232429 medium, healthy, pretty, spiritual, open minded, nonsmoker who is ready to give and receive. ME outdoorsman (x-c skier, hikes, camps etc.), active, educated, 5'10 , 185 , young 40's, live in self built solar home (active, passive), health oriented, positive, warm, intense, dry humor, monogamist, open minded, divorced 6 years, 2 good children part time, wanting to share learning, loving, traveling, home, hugs, life, emotions with similar lady who wears little makeup, often jeans, if she has a hairdryer it's low voltage. This high energy sensitive man will make it worthwhile. Photo appreciated returned. Carl Weil 2477 Co. Rd. 132 Elizabeth, CO 80107 303-646-3213 ENERGY...
A battery rated at 100 Ampere-hours will deliver 100 Amperes of current for 1 hour. It can also deliver 10 Amperes for 10 hours, or 1 Ampere for 100 hours. The average car battery has a capacity of about 60 Ampere-hours. Renewable energy battery packs contain from 350 to 4,900 Ampere-hours. The specified capacity of a battery pack is determined by two factors-- how much energy is needed and how long the battery must supply this energy. Renewable energy systems work best with between 4 and 21 days of storage potential. A battery is similar to a bucket. It will only contain so much electrical energy, just as the bucket will only contain so much water. The amount of capacity a battery has is roughly determined by its size and weight, just as a bucket's capacity is determined by its size. It is difficult to water a very large garden with one small bucket, it is also difficult to run a homestead on an undersized battery. If a battery based renewable energy system is to really work, it is...
Example, (4) home ventilating or cooling uses excess solar power exactly when it is needed most. (3) Water storage for irrigation has enormous potential for making the most of solar power, especially because the most water is required when there is the most sun It is ideal to store at least a two week supply of water. When your storage tank fills, allow it to overflow to some trees the GROUND stores water energy too Use drip irrigation, mulching etc. to minimize evaporation losses. (4) House or attic ventilation or cooling is a prefect way to blow off excess summertime solar power during hot weather. A photovoltaic system is unique in that its generator is composed of small modules and can be expanded over time. This is one of the many factors that make PV power the most liberating energy technology ever developed. Make the most of it by employing integrated system techniques and designing for future needs.
However, much has happened since the fall of Said Barre and the American Blackhawk debacle of the early 1990s. Peace has come to the northern regions, now called Somaliland and Puntland, and elections in Djibouti are breathing fresh hope for peace in the ragged war-torn regions of the south. With all electricity infrastructure destroyed, and among the best solar resources in the world, many Somalis are committed to using solar energy as a new building block for their infrastructure. In July 2000, Energy Alternatives Africa and Horn Relief conducted a basic solar-electric installation course in a Puntland desert oasis community hundreds of miles from the nearest grid. Working with fifteen technicians, we installed six photovoltaic (PV) systems that are now used for lighting and powering school equipment at the Buraan Rural Institute (BRI). Given that Somalia has largely been isolated from the rest of the world over the past ten years, it has not been exposed to the...
Midwest Renewable Energy Association (MREA) workshops. April 6-7, Wind Power for Rural Areas. May 5, Basic PV. May 6, Intermediate PV. May 26, Solar Hot Water Installation. June 10, Solar Water & Space Heating. June 11-15, Utility Intertie Wind Installation. June 16-20, Advanced PV installation. Call for cost, locations, instructors, & further workshop descriptions. Significant others half price. MREA, 7558 Deer Rd., Custer, WI 54423 715-592-6595 Fax 715-592-6596 mreainfo wi-net.com June 22-24, '01 Renewable Energy & Sustainable Living Fair (MREF), Amherst, WI. Exhibits, workshops, & demonstrations. The best fair. MREA, 7558 Deer Rd., Custer, WI 54423 715-592-6595 Fax 715-592-6596 mreainfo wi-net.com
A length of wire is known to have a resistance of 2W. If the wire is carrying 11A of current, how much Electro-Motive-Force or voltage E will be lost in the wire and i how much power is lost as heat in the wire Solution E IR E 11A x .2W 2.2V. . The power that is lost in the wire can be found using P IE P 11A x 2.2V 24.2 Watts W . This would be about half of the available power from a typical solar-panel.
Fuel cells, like batteries, are electrochemical power sources. Whereas batteries store energy, fuel cells transform energy. A fuel cell steadily supplied with fuel generates electricity. The fuel can be virtually any chemical substance containing hydrogen. When hydrogen alone is not readily available as a fuel, it can be produced from substances such as natural gas, oil or methanol by a process called 'reforming'. Reforming, however, consumes energy, produces waste heat and is generally not emission free. Ideally, hydrogen is produced from water by electrolysis, where the electricity is generated by solar power (solar hydrogen).
3.2.8 Roof-mounted photovoltaic system 31 7.2.6 Mounting of the photovoltaic modules 82 9.6.4 A horizontal slatted baffle combined with photovoltaics on the vertical mantle 132 14.1.1 The relevance of the photovoltaic (PV) energy yield in different housing concepts 223 14.2.1 Photovoltaic-thermal (PV T) module with polycrystalline silicon cells taken apart
For the amorphous silicone photovoltaic panels (Unisolar, triple thin-film cells), the inventory material properties are only roughly estimated. In order to give an impression of the influence of this uncertainty in the inventory, the calculations were also carried out for a PV system with crystalline PV panels of similar peak power according to data from Frischknecht et al (1996). Larger differences appear in the cumulative energy demand (CED) of non-renewable energy, as shown in Figure 4.3.6. The cumulative energy demand on non-renewable energy over the life cycle of Sunny Woods ranges from 27 per cent (design value) to 53 per cent (using measured energy data) of the CED of the reference building. The installation of the PV system is favourable because it minimizes the amount of non-renewable energy. The sensitivity of the inventory data used for the PV system is higher than in the calculation with Eco indicator 99 ( 20 per cent of total impact). The polycrystalline PV cells data of...
This makes it able to accommodate rigid photovoltaic modules. Three types of electric lights are used for indoor illumination. Each one has its place in the energy-efficient home. The efficiency and economy of your lighting depends on your choice of the right light for each application AND on the way the light is installed. Wise choices in lighting design can reduce energy requirements by 40-80 Every 100 spent on high efficiency lighting can save 300 or more in system cost (for a typical photovoltaic system). There are two ways to power an alternative energy lighting system, LOW VOLTAGE DC from your battery bank (12 or 24 volts) and 120 VOLTS ac from your inverter or generator. (Readers who are not remote from the utility lines should follow our suggestions for efficient ac lighting.)
The planned rehabilitation of the historic Linde + Robinson Laboratory for Global Environmental Science at the California Institute of Technology in Pasadena, the first LEED Platinum-targeted renovation of a historic lab building, is designed to achieve the lowest energy use of any physical science research lab. The lab's energy use will be reduced by more than 80 percent compared with a typical lab in this climate through a combination of strategies including a 50 percent reduction in lab equipment plug loads radiant cooling that relies on compressor-free cooling half of the year decoupling of ventilation air from cooling radiant ceiling panels low-pressure drop systems and photovoltaic panels for on-site energy production.
Not all sources of renewable energy are as ethereal as sunlight or the wind. Some are as solid as a tree. Gasification of waste wood offers a renewable energy source for combustion. I recently met Richard and Karen Perez and we discussed Renewable Energy Lifestyles. It appears we have been traveling along parallel paths for the past 14 years. While Richard and Karen were concentrating on electricity, my work was and is toward home thermal self sufficiency (i.e. zero supplemental heat). By specifying appropriate insulation, adequate thermal mass and solar gain, most homes can operate the majority of the year without the additional thermal input of heating or air conditioning. Most people would not consider thermal conservation at such an intense level to be a practical investment. Just as there are trade offs in renewable energy equipment, (PV's, batteries, generators, etc.), so there are trade offs in thermal design (solar gain, thermal mass, heating systems, etc.). With the...
Large-scale companies including BMW, Mars, and Interface tout LFG projects as part of their sustainability efforts, and other corporate citizens are purchasing renewable energy credits from LFG projects. Through green power energy initiatives, such as the EPA's Green Power program, a company can buy and trade the renewable attribute of electricity generation from a renewable source, helping to meet renewable energy goals and offset the company's fossil fuel use. Businesses including Staples, DuPont, and Pitney Bowes all have purchased RECs from LFG, and utilities such as Cinergy, Exelon, and We Energies are using LFG in their renewable energy portfolios. Using LFG for energy is a win-win opportunity. LFG energy projects involve citizens, nonprofit organizations, local governments, and industry in sustainable community planning and creative partnerships. These projects go hand in hand with commitments to cleaner air, renewable energy, economic development, improved public welfare, and...
There are four programs that would be put to work within the Green Rail Corridor. First is the idea of solarizing the light rail system itself and installing photovoltaic panels along the system not to power the train, but to power everything around it such as cooling fans and lights. Second, a landscape program would examine the existing land surrounding the corridor to make sure it uses intelligent planting, creates shade, reduces wastewater, and so forth. Third, a program would look at retrofitting houses and businesses along the corridor to become more energy efficient, educating the people who are living there. Fourth, a program would examine the heat island effect and provide builders with a menu of materials or incentives to use materials that would not
Even 'net zero energy houses' and, even more extreme, 'energy plus houses' still need heat production. Both concepts typically achieve zero or a plus by producing enough solar electricity from photovoltaic panels to equal or exceed their total yearly energy consumption - calculated on the basis of primary energy. This is by no means to say that these houses do not need energy input. Given the weak solar radiation during the short winter days, the energy production is minimal in winter, when heating demand occurs. So, heat
Figure 3.3.3 compares the CED of the different house types. The building envelope accounts for approximately 90 per cent of the CED Interior fittings and services (gas, water, heating and electricity installation) represent 7 per cent of the CED. The solar systems make up the remaining 3 per cent, of which the greatest cause is the photovoltaic system.
All houses have a grid-connected photovoltaic (PV) system. In the northern tract, the 1.5 kWp systems are installed on the roofs, oriented to the south. In the southern part, the 1 kWp systems are used as sunshades for the south-facing windows of the first floor. Roof-mounted photovoltaic system Roof-mounted photovoltaic system
Of Colombo, adjacent to the new freeway that connects the city's central district with its international airport. The campus is designed as a series of multistory patient, educational, hospitality, and administrative buildings, linked internally for easy pedestrian access. The massing of the buildings, with their narrow floor plates, courtyards, and light shafts, is designed to maximize energy efficiency through daylight-ing and natural ventilation. Photovoltaic arrays on roof gardens will harvest sunlight for electricity and provide shade for patients and staff.
What a super magazine How incredibly fortunate that I somehow ended up on your mailing list, and I've enclosed a subscription form to cinch the deal. Although I'm not now a home power producer, I do have occasional need for batteries and PV panels to power oceanographic and meteorological data acquisition equipment, and being an oceanographer by training and not an electrical engineer, I've found many of the articles in HOME POWER right on target. My enthusiasm for your magazine, however, stems from my work with a renewable energy resource that is not as well known as wind or solar, but which has great promise, and that is the power of ocean waves. More on that in a moment, but first some quick business. company. One dream I have is to be involved in the design, construction, and operation of a community power plant that utilizes wave devices and PV panels for its renewable energy supply, with a diesel (or better yet, biomass or waste-derived fuel) generator for calm, cloudy days. I'm...
The solution for more sustainable buildings requires a proper integration of manyfactors in building planning, design and technology, and operation.There are no silver bullets that will solve the problem. For example, some designers propose to cover the exterior of the building with photovoltaic panels to deal with the energy needs of the building. There is a poor capacity match between building energy demands and available supply from this technology. For example, if all of the roofs of buildings in New York City were covered with photovoltaic panels, it would still fall far short of meeting the electricity needs of the city.
The second silo now houses state-of-the-art equipment that cleans and reuses up to 200,000 gallons of fresh and salt water at a time. In comparison, the center's old facility could handle only 43,000 gallons of water. Employing salt-water brining, backwash recovery, and solar-powered processing equipment, all of the center's water is reused with the exception of water that is lost to evaporation or used for cleaning. The center's dense animal population means that the system constantly has to churn and clean water, a feat that consumes both energy and money. To help offset the nonprofit's power hunger, the architects fitted uniquely designed pens with 7,000 square feet of photovoltaic shade panels. The panels not only generate 18 percent of the center's total power but also help cool the animals and their pools, thus conserving energy otherwise needed to chill the pool water. The shade panels also help conceal lamps that may otherwise confuse migratory birds flying over the area at...
If a system can produce energy transitions within an ultra-short time interval, then the possibility exists for free energy during this interval. Free energy may lurk in the cracks between our perceptual intervals. In order to use this energy, a collection and storage system must only receive energy from the ultra-short system. This second system may be a one-way, inductive field system with internal dynamic equilibrium. On May 22 23, Flowlight Solar Power and Sun Selector will present a seminar in Santa Cruz, NM to explain & demonstrate photovoltaic water pumping equipment for livestock watering, small-scale irrigation and domestic water supply. Windy Dankoff will present a session on System Design encompassing both deep and shallow pumping systems. Featured will be a demonstration of two workings systems on site. Joseph Bobier will present Electrical Interfacing , highlighting Linear Current Booster (LCB) installation, adjustment and performance. His hands-on presentation will cover...
Appalachia Science in the Public Interest offers 42 videos, incl. Solar Dry Composting Toilets, Solar Hot Water Systems, PV, Solar Space Heating, Solar-Powered Automobiles, Quilted Insulated Window Shades, & more. US 25 + S&H, broadcast-quality tapes available. ASPI Publications, 50 Lair St., Mt. Vernon, KY 40456 606-256-0077 Fax 606-256-2779 aspi kih.net www.kih.net aspi Energy Efficiency & Renewable Energy Clearinghouse (EREC) Insulation Basics (FS142), New Earth-Sheltered Houses (FS120), PV Basic Design Principles & Components (FS231), Cooling Your Home Naturally (FS186), Automatic & Programmable Thermostats (FS215), & Small Wind Energy Systems for the Homeowner (FS135). EREC, PO Box 3048, Merrifield, VA 22116 800-363-3732 TTY 800-273-2957 energyinfo delphi.com www.eren.doe.gov Energy Efficiency & Renewable Energy Network (EREN) links to gov. & private internet sites & Ask an Energy Expert online questions to specialists. 800-363-3732...
SOLAR TODAY helps readers to make a difference by highlighting successful clean energy projects and providing access to the state, regional and student chapters of the American Solar Energy Society, now in 36 states. On Saturday, October 13, 2001, solar homeowners around the U.S. will open their homes to the public for the 6th Annual National Tour of Solar Homes. For more information, see the September October 2001 issue of SOLAR TODAY or visit the American Solar Energy Society web site at www.ases.org. American Solar Energy Society
Has been in the development of energy standards for appliances. Programs such as China Green Lights and the CFC-Free Energy-Efficient Refrigerator Project have extended the traditional technology-based efforts by reaching consumers, dealers and other stakeholders with the product information needed to make responsible choices. Furthering the success of these projects is a new, unified energy informational label developed by the China Sustainable Energy Project (CSEP). The project encapsulates three key aspects of China's policy initiatives mandatory energy efficiency standards, mandatory (and unified) energy information labeling, and voluntary energy efficiency labeling. In August of 1999, China formally launched the label, awarding the first one to refrigerators. These ideas must be transferred to the building material industry to give the necessary instruction and incentive to supply certified, quality insulation, windows, and other products.
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