Performance Prediction of Hybrid GSHP System Considering Ground Thermal Balance

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Geothermal Heat Pump Systems

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Abstract

Thermal imbalance is usually encountered in the application of ground-source heat pumps (GSHP) in cooling or heating load-dominated areas, which results in the performance degradation of the GSHP system. Hybrid ground-source heat pump (HGSHP) combining cooling tower, domestic hot water (DHW), or other auxiliary technologies has been developed to attemper the underground heat or cold accumulation in cooling or heating load-dominated zones. This chapter will discuss several typical hybrid ground-source heat pump systems, how to build and validate the numerical model for the HGSHP system based on the TRNSYS code, and prediction and analysis of the long-term performances of the HGSHP systems considering the ground thermal balance via the optimization of the system operation strategies. This chapter focuses on the research of auxiliary heat dissipation that is suitable for heat accumulation systems. Several schemes for alleviating the underground heat accumulation of GSHP and kee** higher system efficiency are proposed and validated by the simulation work. For a typical GSHP system equipped in an office building, the optimum design and operation parameters are given for each scheme, respectively.

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Correspondence to Wenzhi Cui .

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Zhou, S., Cui, W. (2023). Performance Prediction of Hybrid GSHP System Considering Ground Thermal Balance. In: Borge-Diez, D., Rosales-Asensio, E. (eds) Geothermal Heat Pump Systems. Green Energy and Technology. Springer, Cham. https://doi.org/10.1007/978-3-031-24524-4_8

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  • DOI: https://doi.org/10.1007/978-3-031-24524-4_8

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-031-24523-7

  • Online ISBN: 978-3-031-24524-4

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