Why We Need Energy Efficient Home Design

Transcription

1 DESIGNING PASSIVE SOLAR HOMES Why We Need Energy Efficient Home Design PPT downloaded from Feb 2011: PPT downloaded from Feb 2011: urriculum?action=2&cmobjid=177281&view=viewer&refcm objid=132949

2 World Energy Consumption Forecast 54% increase in next 20 years (Energy Information Agency, 2004)

3 World Primary Energy Sources Source: Energy Information Agency, U.S. Department of Energy 2002 Hydro 6.6% 25 quads Geothermal, solar wind, waste 0.8% 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)

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

7 Grinnel Glacier, Glacier National Park, Montana 1911 And 2000

8 Source: National Geographic, In Hot Water, August, 2005, p. 72

9 Source: TIME, Special Report. An American Tragedy, September 12, 2005

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11 Summary: ASPO view 50 Non-con Gas Oil topping point Oil and gas topping point oe/a 40 Gas NGLs Producti ion, Gb Polar Oil Deep Water Heavy Regular Source: ASPO

12 Natural Gas: Volatile Prices Price projected to increase another 40% by 2020 Source: American Gas Assn

13 THE SUN Abundant Reliable Inexhaustible Distributed De-Centralized Green

14 SOLAR ENERGY Heating Buildings Heating Water Producing Electricity from light

15 Principles of Solar Home 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

16 #1: Let Sun In: A. Orientation; Seasonal Sun Angles Summer: 74 Winter:30

17 Winter Sun Angle 30degs. #1: Let Sun In: Direct Gain: Glass: the magic solar heating technology

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19 #1: Let Winter Sun In: Clerestory Windows

20 #2. Summer: Keep Sun Out

21 #2: Strategic Use of Eaves: Using Seasonal angles to our advantage Designing with Nature. Two foot eaves work well.

22 #2: Shading: Sun Angle: Key: Vertical Glass, not skylights

23 #2: Eaves to Keep Summer Sun Out: Summer Sun Angle Let Winter Sun In Winter Sun Angle

24 Porches, shade zones, strategically planted trees

25 Angled Slats in Shade Structure Angles slats let winter sun in

26 #1 and #2: Let s in Winter Sun; Reflects Off Summer Sun

27 #3: Storage: Store Energy Gained Thermal Mass: (Conduction and Convection)

28 #3: Direct Gain with Thermal Mass Thermal Mass Thermal Mass

29 Trombe Wall with Windows

30 #4: Keep Sun s Energy In: Weatherization:

31 #4: Keep Sun In: Insulation: Keeps heat in in the winter and heat out in the summer

32 Some Tried and True--these methods have been around for a long time.

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

34 #5: Ventilation

35 Example #1: Note Features

36 Example #2: Note Features

37 Example #3: Note Features

38 Rammed dearth The use of Thermal Mass

39 Rammed Earth Construction

40 Earth ship House

41 Inside an Earth ship House

42 Example #4: Note Features

43 Example #4: even in winter

44 Note Passive Solar Features

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

46 Ancient Design: g Passive Solar has been around for a long time

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

48 Which view is South facing, which North facing?

49 What direction does this wall face?

50 Designed for Desert Climate, multi-family, and re-use of materials Earth Berm as Geothermal Earth Berm as Geothermal tempering

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53 Southern Elevation: Useful for designing south facing glass layout. Note doors are also glass in this design.

54 4 ft x 5 ft = 20 sq ft

55 East Elevation: Useful for designing eaves and also studying depth of seasonal sun light penetration

56 Use East Elevation to Calculate Winter Sun

57 Use East Elevation to Calculate Summer Sun

58 Solar energy

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60 Inverter, Fused Disconnects, Breakers, and Extra Meter Meter Box Inverter DC AC DC Disconnect Switch AC Disconnect Switch

61 Installing the Solar Modules

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63 Thinking out side the BOX Adding Green spaces

64 Architect Mick Pearce EAST GATE THE SYNTHISIS OF DISCIPLINES

65 Eastgate The extraordinary Eastgate Building in Harare, Zimbabwe, is just one example of sustainable architecture that uses dramatically less energy by copying the successful strategies of indigenous natural systems. The building - the country's largest commercial and shopping complex - uses the same heating and cooling principles p as a local termite mound. The Eastgate Building has Eastgate Building has no air-conditioning and virtually no heating!

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70 EAST GATE

71 Termites in Zimbabwe build gigantic mounds inside of which they farm a fungus which is their primary food source. The fungus must be kept at exactly 87 degrees, while the temperatures outside range from 35 degrees (f) at night to 104 degrees (f) during the day. The termites achieve this remarkable feat by constantly opening and closing a series of heating a cooling vents throughout the mound over the course of the day. EAST GATE The building uses less than 10 percent of the energy of a conventional building its size. These efficiencies i i translated directly to the bottom line: The Eastgate's owners saved $3.5 million on a $36 million building because an air- conditioning plant didn't have to be imported.

72 IMAGINE YOUR FUTRUE! Imagine it, create it, draft it

73 And now for something really WILD!

74 Roger Dean

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