Modeling of foundation heat exchangers—Comparison of numerical and analytical approaches
foundation heat exchanger, ground-source heat pump, simulation, ground heat exchanger
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.
Tsinghua University Press
Lu Xing, James R. Cullin, Jeffrey D. Spitler. Modeling of foundation heat exchangers—Comparison of numerical and analytical approaches. Build Simul, 2012, 5(3): 267–279.