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YMCA @ Virginia Tech 215 Maywood Street Blacksburg VA 24060

YMCA @ Virginia Tech 215 Maywood Street Blacksburg VA 24060. L. David Roper http://arts.bev.net/RoperLDavid http:// www.roperld.com/science/YMCASolarGreenhouse.htm http://www.roperld.com/science/YMCASolarGreenhouse.ppt. YMCA @ Virginia Tech Community Gardens. Orchard. Pond. House.

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YMCA @ Virginia Tech 215 Maywood Street Blacksburg VA 24060

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  1. YMCA @ Virginia Tech215 Maywood StreetBlacksburg VA 24060 L. David Roper http://arts.bev.net/RoperLDavid http://www.roperld.com/science/YMCASolarGreenhouse.htm http://www.roperld.com/science/YMCASolarGreenhouse.ppt

  2. YMCA @ Virginia TechCommunity Gardens Orchard Pond House Bee Hives RSGH Tank Cistern Tank Maywood Street off North Main Street

  3. YMCA @ Virginia TechCommunity Gardens RSGH

  4. April 2010

  5. July 2010

  6. YMCA @ Virginia TechSolar Greenhouse Conceived in late 2006. Colley Architect’s drawings approved in July 2008. Architecture by Colley Architects

  7. YMCA @ Virginia TechSolar Greenhouse

  8. Heat Sink • Air flow ~4ft/sec through 4” slotted drain pipes. (395 cfm) • Move 5 times the SGH volume per hour. (500 cfm)

  9. Traditional Solar Greenhouse Heat Sink Univ. of Missouri

  10. Traditional Solar Greenhouse Heat Sink Omega Lane Farm near Rural Retreat VA uses rectangular honey cans. Blue promotes vegetative growth. Red promotes flowering.

  11. Planting Beds

  12. Excavation Late October 2008 Jeff Ligon Excavation

  13. Excavation & Footers

  14. Insulated Concrete Forms (ICF) November 2009 Doug & Tim Hoback 1.5” insulating foam on each side. 8” of concrete between.

  15. Pouring Concrete into ICF Cold day in middle of November 2008 Conrock Concrete & Jeff Ligon

  16. Insulation Inside & Outside Late November 2009 Snyder Waterproofing

  17. Heat Sink Insulation Early December 2008 Justin Boyle, Contractor Pat Bixler, Comm. Chair 6-mil polyethylene on bottom; 2” insulating board; 6-mil polyethylene on top.

  18. Heat Sink Structure Tim Colley, Architect Dave Roper, Worker

  19. Heat Sink

  20. Installing Rafters

  21. North Roof Early January 2009 Hammer Down Construction Richard Reid

  22. West End Late January 2009 DiStefano Siding

  23. East End

  24. Installing Polycarbonate

  25. Polycarbonate On Middle February 2009 20’ long x10-mm thick double-walled polycarbonate with ribs separated by 1 cm.

  26. Closed-Cell Foam Insulation Late March 2009 Evergreen Insulation Wall panels outside and inside are Hardie Board, a cement-fiber composite.

  27. Inside Hardie Board Early April 2009 DiStefano Siding

  28. Painting Middle April 2009 Virginia Tech students Gail Billingsley VTYMCA Abi Convery VTYMCA

  29. Building Soil & Walkway April 2009 Debbie Wiley Dave Roper

  30. Electrical May 2009 Chris Roberts of Baseline Solar

  31. 2090-Gallons Cistern Late April 2009 David King

  32. David Nickerson, Model Builder and Worker Trex & Choice-Dek Composite Boards

  33. Heat-Sink Inlet & Shelves Heat-Sink Fan

  34. Vent Windows & Openers

  35. Water System David King

  36. Chris Roberts Baseline Solar Control Panel Window Fan Thermostat Heat-Sink Fan Thermostats Window-Openers Thermostats & Switch & 120V AC->24V DC Converter Heat-Sink Fan Variable-Speed Switch

  37. Thermostats • Heat-Sink Cooling: fan on at 70 degrees, off at 61 degrees. • Heat-Sink Heating: fan on at 50 degrees, off at 59 degrees. • Window Opener: Opens at 70 degrees, closes at 50 degrees. • Window Fan: On at 85 degrees, off at 65 degrees.

  38. Roper Solar Greenhouse at night. 3 lights on left are LEDs. 3 lights on right are CFLs.

  39. Payne Shelter

  40. Changes I Would Make • Do not insulate the inside of the concrete walls; instead double the insulation outside the concrete walls. Gives more thermal mass. • Install much larger vent windows for more cooling. • Connect the ends of the 4” slotted drain pipes closer to each other at the 24” end pipes. • Better brace the Hardie-board that separates the rocks under the walkway from the planting soil. • Not put the soil in until all inside structure is built.

  41. Winter of 2009-2010 • Middle school students at Blacksburg New School planted in west half. Tried some plants that are known to not grow well in solar greenhouses, such as tomatoes. • John Ogburn organized 8 gardeners to plant in east half on 4’x7’ plots. I was one of them. • Greens did very well with bumper crops. • Aphids appeared. Eventually controlled with ladybugs.

  42. North-East Quadrant in November

  43. South-West Quadrant in November

  44. Roper Plot in February

  45. Temperatures in February 2010

  46. Back Yard Solar Greenhouse

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