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DESIGNING PASSIVE SOLAR HOMES Why We Need Energy Efficient Home Design

DESIGNING PASSIVE SOLAR HOMES Why We Need Energy Efficient Home Design. World Energy Consumption Forecast 54% increase in next 20 years (Energy Information Agency, 2004). World Primary Energy Sources Source: Energy Information Agency, U.S. Department of Energy 2002.

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DESIGNING PASSIVE SOLAR HOMES Why We Need Energy Efficient Home Design

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  1. DESIGNING PASSIVE SOLAR HOMESWhy We NeedEnergy Efficient Home Design

  2. World Energy Consumption Forecast54% increase in next 20 years (Energy Information Agency, 2004)

  3. World Primary Energy Sources Source: Energy Information Agency, U.S. Department of Energy 2002 Geothermal, solar wind, waste 0.8% Hydro 6.6% 25 quads Nuclear 6.6% 25 quads Petroleum 37.9% 153 quads Natural Gas 23.5% 95 quads Fossil Fuels: 85% of Primary Energy Coal 24.1% 153 quads

  4. World Carbon Dioxide Emissions(Source: Energy Information Agency, 2004)

  5. (pictured to the left) Source: “Defusing the Global Warming Time Bomb”,James HansenScientific American, Vol. 290, No. 3, (March, 2004), p. 69 (Pictured above)Source: Nature’s Voice, Natural Resources Defense Council (Jan/Feb, 2004)

  6. Grinnel Glacier,Glacier National Park, Montana1911And2000

  7. Source: National Geographic, “In Hot Water”, August, 2005, p. 72

  8. Source: TIME, Special Report. “An American Tragedy”, September 12, 2005

  9. Oil and gas topping point Summary: ASPO view Oil topping point Source: ASPO

  10. Natural Gas: Volatile PricesPrice projected to increase another 40% by 2020Source: American Gas Assn

  11. THE SUN Abundant Reliable Inexhaustible Distributed De-Centralized Green

  12. SOLAR ENERGY • Heating Buildings • Heating Water • Producing Electricity from light

  13. Principles of Solar Home Design • Winter: Sun In: Orientation and Angle. • Summer: Keep Sun out: Use of Eaves, shade zones, and color. • Storage: Thermal Mass: Store warmth in the winter; store “cool” in summer; keeps temperature even • Weatherization: Keep warmth in in the winter and out in the summer. • Air Circulation: For Cooling and Warming

  14. #1: Let Sun In: A. Orientation; Seasonal Sun Angles Summer: 74 Winter:30

  15. #1: Let Sun In: Direct Gain:Glass: the magic solar heating technology Winter Sun Angle30degs.

  16. #1: Let Winter Sun In: Clerestory Windows

  17. #2. Summer: Keep Sun Out

  18. #2: Strategic Use of Eaves: Using Seasonalangles to our advantage “Designing with Nature”. Two foot eaves work well.

  19. #2: Shading: Sun Angle: Key: Vertical Glass, not skylights

  20. #2: Eaves to Keep Summer Sun Out: Let Winter Sun In Summer Sun Angle Winter Sun Angle

  21. Porches, shade zones, strategically planted trees

  22. Angles slats let winter sun in Angled Slats in Shade Structure

  23. #1 and #2: Let’s in Winter Sun; Reflects Off Summer Sun

  24. #3: Storage: Store Energy Gained Thermal Mass: (Conduction and Convection)

  25. #3: Direct Gain with Thermal Mass Thermal Mass Thermal Mass

  26. Trombe Wall with Windows

  27. #4: Keep Sun’s Energy In: Weatherization:

  28. #4: Keep Sun In: Insulation:Keeps heat in in the winter and heat out in the summer

  29. What does this picture say to you?

  30. Tried and True--these methods have been around for some time.

  31. Insulation: Straw Bale: 2 feet thick: Holds in heat in winter and keeps it out in Summer: R-value approx. 30

  32. #5: Ventilation

  33. Example #1: note features; anything missing?

  34. Example #2: Note Features

  35. Example #3: Note Features

  36. Rammed Earth The use of Thermal Mass

  37. Rammed Earth Construction

  38. Earth ship House

  39. Inside an Earth ship House

  40. Example #4: Note Features

  41. Example #4: even in winter

  42. Note Passive Solar Features

  43. Rather normal looking for a “solar home;” note water heater in addition to home heating.

  44. Ancient Design: Passive Solar has been around for a long time

  45. High School Wind Generator Solar PV Electricity Adequate Overhangs? Southern Glass

  46. Which view is South facing, which North facing?

  47. What direction does this wall face?

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