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Performance of a spiral ground heat exchanger for heat pump application

From National Research Council Canada

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Affiliation
  1. National Research Council of Canada. NRC Institute for Research in Construction
FormatText, Article
Subjectground source heat pumps; heat exchangers; cold weather; echangeur de chaleur; temps froid
Abstract
A high-efficiency ground heat exchanger has been developed for use with ground-source heat pumps. The exchanger is made of copper tubing, shaped in the form of a spiral, which can be installed in a vertical borehole backfilled with sand. Thermal performance of a full-scale prototype indicated that this heat exchanger can achieve very high heat extraction rates if subfreezing operating temperatures are used. For most soil types cyclic freezing and thawing is not a problem; however, for the sensitive Leda clay in which the prototype tests were conducted, substantial settlement occurred after the first freeze-thaw cycle owing to initial collapse of the soil structure.
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  • International Journal of Energy Research 13, no. 5 (September 1989): 503–510.
LanguageEnglish
Peer reviewedYes
IdentifierIRC-P-1667
NRC numberNRCC 32335
NRC-IRC-2311
NPARC number20374315
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Record identifier9b2bfd21-28f0-4b07-8755-a9a15b84674e
Record created2012-07-23
Record modified2020-06-06
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