Northern Greenhouse Design Project
Stephen Mooney, P.Eng.
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Outline
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Background
Objectives
Incorporated Innovations
Into the Future
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Background
Cold Climate Innovation
Yukon College
– School of Access
– School of Trades, plumbing and carpentry
Stage 1 Building Envelope
Sept. 01– Dec. 31,2011
Stage 2 Install growing beds and mechanical system Jan. 01,2012 – April 31, 2012
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Objectives
Overcoming Challenges
•Cold weather ‐Expensive heating costs
•Low light winter growing conditions •Moisture build up inside the greenhouse
•Heating management of
the greenhouse
•Air exchanges and CO2
depletion
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Heat and Electricity
• Stirling Engine
• WhisperGen, Personal Power Station ‐ PPS16
• 800w electrical power
• 5.5Kw thermal power
• 19,000Btu
• 90% efficient as Combined Heat and Power (CHP)
• 12% efficient as elec.
• 78% efficient as heat
• 0.75L/hr @ max out 5
Glazing
Quad‐pane 25mm polycarbonate Glazing
R‐4 greenhouse glazing – Polygal Thermogal Light transmission and R‐Value equivalent to double glass
Light scattering better than clear glazing
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LED Grow Lights
Growmaster – 9w/light bar
Hydrogrow – 155w/light bar
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Insulation
Vacuum Insulated Panels (VIP) ‐ insulated Shutter – R‐27 per ½”
– Peel and Stick
– Mechanized shades to maximize efficiency 8
Greenhouse Mechanization
Greenhouse systems are mechanized for ease of operation
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Watering (soil moisture)
Shutters
Lighting
Ventilation (CO2 and RH)
Soil Bed Temperature
Battery charging and Stirling operation
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Thermal Storage and Heat Modulation
Water thermal storage under the beds to store
daytime heat and release it during the night.
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Long Term Objectives • Greenhouse available for research
• Biochar, Mine remediation • Year round production –reduce operating costs
• Test northern varieties of crops Key areas of design
•No glazing on the North
•Factor in Heat loss
•Spend the $ on insulation
•Look for ways to be innovative with inexpensive materials
•Cheap Heating Source
http://yukongreenhouse.weebly.com/
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A quote from an elder from Tuktoyuktuk,
“Tell me, and I will probably forget. Show me, and I might remember.
Involve me, and I will understand.”
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