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Environmental Controls I/IG

Environmental Controls I/IG. Lecture 11 Passive Heating Photovoltaics and Active Solar Panels. Passive Heating. Passive Solar Heating. Zoning: Solar Gain varies throughout the day Configure building in accordance thermal patterns and usage needs. Passive Solar Heating.

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Environmental Controls I/IG

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  1. Environmental Controls I/IG Lecture 11 Passive Heating Photovoltaics and Active Solar Panels

  2. Passive Heating

  3. Passive Solar Heating Zoning: Solar Gain varies throughout the day Configure building in accordance thermal patterns and usage needs

  4. Passive Solar Heating Three major types:

  5. Thermal Mass Creates time lag for indoor air temperature changes and reduces temperature swings Note: Temperature swings ≥ 13ºF are not acceptable L: p. 154, F7.6c&d

  6. Thermal Mass & Insulation Insulation decreases temperature swings

  7. Direct Gain System Heat gain occurs directly in living space Mass moderates the “greenhouse effect” L: p. 154 Fig. 7.6a&b

  8. Direct Gain Sizing Guidelines Glazing area L: p.156 T7.7a

  9. Direct Gain Sizing Guidelines Thermal Mass L: p.157, T7.7B

  10. Direct Gain—Sizing Example Design a direct gain system with night insulation for Salt Lake City for a 40’ x 20’ (800 sf) house. H L

  11. Direct Gain—Sizing Example Find glazing area Salt Lake City 800sf x 26%=208sf L: p.156 T7.7a

  12. Direct Gain—Sizing Example Find thermal mass area 208sf x 3=624sf 6” thick Revise mass location to suit designconditions L: p.157, T7.7B

  13. Direct Gain—Sizing Example Design a direct gain system with night insulation for Salt Lake City for a 40’ x 20’ (800 sf) house. If glazing is 8’ tall, how long is the window? 208sf/8’=26’ long Note: verify solaraperture and adjustdimensions accordingly 8’ 26’

  14. Thermal Storage Wall Commonly known as a “Trombe Wall” Space between glazing and wall is not habitable L: p. 159, F7.9a&b

  15. Trombe Wall Provides only a limited view to outdoors Sante Fe, NM

  16. Trombe Wall Sizing Guidelines Glazing area L: p.156, T7.7a

  17. Trombe Wall Sizing Guidelines Wall Thickness L: p.163, T7.10

  18. Sun Spaces Sun spaces come in three configurations L: p.164, F7.12a

  19. Sun Spaces Sloped glazing presents shading and space problems L: p.161, F7.14a-c

  20. Sun Spaces Sun heat gain space separated from living space by thermal mass and operable partitions L: pp. 164, F.7.12b&c

  21. Sun Space Overheating Venting and insulation may be needed to prevent overheating Upper and lower outside vents: each should 5% of glazing area Upper and lower “common wall” inside vents should be ≥10% of glazing area L: p.167, F7.14ab

  22. Sun Space Sizing Guidelines Glazing area Note: convert sloped glazing to the vertical equivalent L: p.156 T7.7a

  23. Sun Space Mass Sizing Guidelines Wall Thickness L: p.168, T7.14

  24. Photovoltaics and Solar Panels

  25. Photovoltaics Produce high grade energy (electricity) NREL PV Testing Facility, Golden, CO

  26. Photovoltaics Can be integrated into numerous building products Entrance canopy, Thoreau Center for the Environment, San Francisco, CA Roof shingles, NREL Testing Facility, Golden, Co

  27. Solar Panels Produce low grade energy (warm/hot water) Flat Plate Solar Panel, Salt Lake City, UT

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