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Autonomous Solar Strategies Thursday, Feb. 5, 2004 uvm/~gflomenh/CDAE170/

Autonomous Solar Strategies Thursday, Feb. 5, 2004 http://www.uvm.edu/~gflomenh/CDAE170/. Gary Flomenhoft , BSME, MPP, CEE Research Associate, Gund Institute, SNR. Why Solar?. World Oil Extraction. Peak Gas and Oil. The Epoch of Fossil Fuel Exploitation (after Hubbert, 1969). 300. 200.

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Autonomous Solar Strategies Thursday, Feb. 5, 2004 uvm/~gflomenh/CDAE170/

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  1. Autonomous Solar Strategies Thursday, Feb. 5, 2004 http://www.uvm.edu/~gflomenh/CDAE170/ Gary Flomenhoft, BSME, MPP, CEE Research Associate, Gund Institute, SNR

  2. Why Solar?

  3. World Oil Extraction

  4. Peak Gas and Oil

  5. The Epoch of Fossil Fuel Exploitation (after Hubbert, 1969) 300 200 Trillion kwh per year 100 +5 +1 +2 +3 -1 +4 -5 -4 -3 0 -2 Mayan Steam culture Stonehenge Built Parthenon Engine completed Pyramids Iron in constructed Black Middle Death East Inquisition Magellan's Circumnavigation

  6. Prices = Economic Scarcity What is the scarce resource?

  7. Scarce resource but no price 150 years for feedback

  8. Forms of Solar

  9. GREECE

  10. CHINA

  11. HELIOCAMINUS

  12. DUTCH

  13. WINDOW INSULATION-DUTCH

  14. HORTICULTURE

  15. CONSERVATORY HEAT

  16. ROOF GARDENS

  17. SOLAR HOT DOGS

  18. How much solar?

  19. Vermont Fuel choices

  20. VT Electric Energy Supply Mix

  21. John’s House Rough Lumber from Local Mill Spruce Siding from Local Mill Roof Slate Recycled from Old Barn House is Super Insulated (R 30 walls dense-pack cellulose) Casement Windows are R 6 Heat w/ Wood, 1 cord/winter Back-up radiant heat 1400 square feet + basement Greenhouse is mostly recycled Double Pane Glass in Greenhouse Greenhouse Wood is Salvaged old-growth Cypress NO PLYWOOD!

  22. Passive Solar Building Strategies Choose a good site. Orient east-west and 10deg to TRUE south Locate most windows on south side 7-12% of ft2. Minimize windows on N,W,E sides Provide overhangs or shading to regulate solar gain Thermal storage mass Insulate walls, ceilings, floors, foundations, & windows Protect insulation from moisture Seal house against air infiltration; provide air exchange Provide direct solar heat to each room Create sun free spaces Provide properly sized eco-friendly back-up Protect from wind by landscape or earth berm Synchronize design with living patterns

  23. 1. Choose a good site BURLINGTON, VT DATA

  24. 1. Choose a good site-bearing angle

  25. 1. Choose a good site-Altitude angle

  26. 1. Choose a good site

  27. 2. Orient EAST-WEST AXIS to TRUE south STOP

  28. 2. Orient within 10deg to TRUE south

  29. 2. Orient within 10deg to TRUE south 2800 km

  30. 2. Orient within 10deg to TRUE south

  31. Declination (variation) 2. Orient within 10deg to TRUE south

  32. PASSIVE SOLAR DESIGN-5 Design Elements

  33. PASSIVE DESIGN

  34. PASSIVE DESIGN

  35. PASSIVE DESIGN

  36. PASSIVE DESIGN-Direct Gain

  37. PASSIVE DESIGN

  38. Indirect Gain: Trombe wall (unvented)

  39. Indirect Gain: Trombe Wall: vented (Thermal storage or Trombe wall) Vented Trombe wall

  40. Indirect gain: Sunspace

  41. Garden Room Ted Montgomery’s Green Home

  42. Looking South is a Sunroom Topped with PVs

  43. Review of Indirect Gain Principles-Chiras Orient south +-10 degrees High performance glass Thermally isolate glass High quality caulk Use Selective surface or high temp paint Use dense material Minimal interior finish Insulate glass at night Direct + Indirect glazing = MAX 20% of floor area

  44. Selective Surfaces

  45. 3. Locate most windows on south side South glass: 7-12% of floor footage SQUARE FOOTAGE = HEATED FLOOR AREA EXAMPLE: 12% OF 3000 SQ FT = 360 SQ FT 4. Minimize windows on N,W,E sides North glass: <=4% East glass: <=4% West glass: <=2% Use low-e multiple panes

  46. Windows-Yestermorrow Windows Facing South Ventilation throughout building Triple pane glass

  47. PASSIVE DESIGN

  48. What kind of windows?

  49. What kind of windows?

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