Modeling of foundation heat exchangers—Comparison of numerical and analytical approaches

Lu Xing*, James R. Cullin, Jeffrey D. Spitler

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

Foundation heat exchangers (FHXs) are an alternative to more costly ground heat exchangers utilized in ground-source heat pump (GSHP) systems serving detached or semi-detached houses. Simulation models of FHX are needed for design and energy calculations. This paper looks at two approaches used for development of simulation models for FHX systems: a simplified analytical model and a detailed numerical model. The analytical model is based on superposition of line sources and sinks. The numerical model is a two-dimensional finite volume model implemented in the HVACSIM+ environment. Both the analytical and numerical models have been validated again experimental results from a test house located in Oak Ridge, Tennessee. Six geographically diverse locations are chosen for a parametric study; results of the two models are compared, and differences between the results are investigated.

Original languageEnglish
Pages (from-to)267-279
Number of pages13
JournalBuilding Simulation
Volume5
Issue number3
Early online date13 Jul 2012
DOIs
Publication statusPublished - 1 Sep 2012
Externally publishedYes

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