Heat transfer characteristics of in-ground heat exchangers

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Journal titleEnergy Research
Pages265278; # of pages: 14
Subjectheat transfer; heat pumps; polymeric materials; pipes; thermal properties; heat exchange; heat pumps; ground-source heat exchangers; Pipes and pipelines
AbstractMost in-ground heat storage installations use a system of horizontal or vertical plastic pipes to carry heat exchanger fluid. In designing these systems it is generaly assumed that the thermal effects of the plastic pipe can be neglected. This paper reports a laboratory study of the pattern of heat flow around fluid-carrying plastic pipe buried in clay soil. Heat flow measurements as well as estimated contact resistances are presented for a number of configurations. In addition, numerical model computations are given for steady-state, transient and cyclic behaviour of several configurations, and it is shown that substantially reduced heat flows are obtained when plastic pipe is used.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number22674
NPARC number20373872
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Record identifier85be50b8-028c-4396-985e-0fcb4bc3f1be
Record created2012-07-23
Record modified2016-05-09
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