OS:Ground Source Heat Pump
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Low Cost Ground Source Heat Pump
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Objective
To build a ground source heat pump using common materials from the hardward store at low cost.
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Proposed Technology
Utilize heat pipe technology commonly found in solar evacuated tubes. Use copper pipe threaded and capped at both ends for the heat pipe. The gravity fed evaporation/condensation cycle requires no motor or pump. Tubes can be placed in holes dug with a post hole auger. The fluid used in the pipe must boil at temperatures below 40 degrees F and should be non-toxic.
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Background Information
- What are Heat Pipes? (http://www.heatpipe.com/heatpipes.htm)
- How are heat pipes used in solar collectors? (http://www.thermomax.com/Heat_Pipe.htm)
- IEA Heat Pump Centre Newsletter (http://www.uneptie.org/ozonaction/sector/hpc_newsl.pdf) - in pdf format. See page 6 CO2 Ground-Coupled Probe. A test of using carbon dioxide in a heat pipe as a vertical ground heat exchanger.
