Goals Solar Home Design Best Practices Solar Thermal Technology Use the principles to build model Solar homes
World Energy Consumption Forecast 54% increase in next 20 years (Energy Information Agency, 2008)
The Sun’s Energy can… Heat/Cool Buildings Heat Water Produce Electricity from light Cook Food Purify Water Grow Food "I'd put my money on the sun and solar energy. What a source of power! I hope we don't have to wait 'til oil and coal run out before we tackle that." -- Thomas Edison, 1931
Optimizing with Solar Design 1.Winter: Sun In: Orientation and Angle. 2.Summer: Keep Sun out: Use of Eaves, shade zones, and color. 3.Storage: Thermal Mass: Store warmth in the winter; store cool in summer; keeps temperature even 4.Weatherization: Keep warmth in in the winter and out in the summer. 5.Air Circulation: For Cooling and Warming
Photovoltaic Systems Canon Beach, Oregon - Net Zero Home
Indigenous “Solar” Architecture Incorporates important green energy concepts including orientation, shading, thermal mass Utilizes local, usually on site building opportunities and materials
Anasazi Pithouse 500 CE, Green Energy and Materials: geothermal temperature control using constant temp of earth (dug in); insulation and thermal mass from the floor/wall/roof construction; good use of local materials with minimal consumption of wood.
Navaho: Hogan: Sacred Home Spiritual"The circular hogan with its east-facing door and its earthen floor is constructed to encourage harmony, just as the spiritual beings first instructed," Cambridge explained. [Note use of local materials, east-facing door brings in morning light/warmth, solar mass, ?insulation. Well sealed.
Navajo (Dine) Hogan East Facing for morning solar gain Thermal mass and possibly insulation from the combination of earth, mud, clay, wood grasses Protection from infiltration of cold from North Use of Local Materials “Affordable”
The Colorado Solar Hogan Project has produced a prototype for a dwelling that is a traditional hogan attached to compatible, modern circular dwelling that demonstrates how Navajo culture can influence new forms of housing.. (http://www.dennisrhollowayarchitect.com/html/SolarHoganaa.html
With its cribbed ceiling and east-facing door, Holloway's creation is undeniably hogan-like. Heat and electricity are produced by combining active and passive technologies. Outside, photo voltaic cells track the sun, and closed- system solar collectors heat water in a 120-gallon tank. Inside, vegetables can be grown in flower beds.
Taos Pueblo Copyright(C) 1999 David Slauson. This image is copyrighted. The copyright holder allows anyone to use it for any purpose, provided that the photographer is credited.
Taos Pueblo (inhabited for over 1,000 years) Built between 1000 and 1450: Thick Adobe Wall Construction Puebloan (aka Anasazi) Photo taken by Bobak Ha'Eri. May 2005Bobak Ha'Eri
Pueblos as Green Buildings Adobe provides thermal mass as well as local green building product with healthy breathable walls Built with materials on site Orientation: South-facing for passive solar gain [ck] if this is always the practice Many adjacent units increases the energy efficiency—all have access to the south but the other directions are protected and “insulated.” ck