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

C. Rousseau1 J. Fannou1 L. Lamarche1 M. Ouzzane2
1École de Technologie Supérieure, Montréal, Québec, Canada
2CanmetENERGY, Varennes, Québec, Canada

Ground heat exchanger.

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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