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Achard, Gilbert. Numerical study of the evolution of ground-coupled heat pump system performance. In: BUILDING SIMULATION, 9., 2005, Montreal. Anais... Montreal: IBPSA, 2005.
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Abstract

This study is focused on the ground heat pump (GHP) used in heating single-family houses. These systems generate a ground heat depletion which decreases its performances after several years of operation. The study relates to the evolution of ground heat pumps performances and on simples solutions to maintain a stable temperature in the ground. The use of GHP in cooling mode during the summer and the coupling of thermal solar collectors with the boreholes is a good solution to complete the natural ground recovery. The simulations carried out under TRNSYS show that the benefit exists but is relatively low.
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