Ground-coupled heat pump demonstration
This report presents the results of a field evaluation of an innovative ground-coupled heat pump system which features a unique collector design and system control strategy aimed at maximizing heat pump performance by minimizing ground temperature change. The collector design includes several short closed loops, each consisting of a pair of polyethylene pipes buried 12 to 18 inches apart in a horizontal trench approximately six feet below ground. A micropressor is used to control flow and optimize system operation. Extrapolation of the results of experiments conducted on a unit length (250 ft.) of collector field during the 1981-82 and 1982-83 heating seasons indicates that a system seasonal performance factor of 2.75 to 3.0 will be achievable in practice.
- Research Organization:
- Spencertown Geo-Solar Associates, NY (USA)
- OSTI ID:
- 6898238
- Report Number(s):
- PB-84-156223
- Country of Publication:
- United States
- Language:
- English
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Ground-coupled heat-pump-system experimental results
Ground-coupled heat pump system experimental results