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Modeling and Analysis of a Direct Expansion Geothermal Heat Pump (DX): Part I-Modeling of Ground Heat Exchanger

C. Rousseau[1], J. Fannou[1], L. Lamarche[1], M. Ouzzane[2]
[1]École de Technologie Supérieure, Montréal, Québec, Canada
[2]CanmetENERGY, Varennes, Québec, Canada

Published in 2012

Geothermal heat pump technology is actually one of the most interesting processes to provide heat and cold to a building. In this study, a model of the ground exchanger of a direct expansion geothermal heat pump (DX) is going to be presented in 1 dimension. The model represents the phase change of the refrigerant, here Chlorodifluoromethane R22, with governing continuity, momentum and energy equations and with heat exchange between pipe and grout. A comparison of the temperature of the pipe with an experience is presented. This result validated our model.

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