STUDY ON HEAT TRANSFER PERFORMANCE OF GROUND HEAT EXCHANGERS WITH DIFFERENT PIPES CONSIDERING LAYERED STRATUM

Zhang Yuanyan; Tao Xiu; Chen Mou; Xia Chenyu; Xie Haiyan; Chen Feizhou

doi:10.19912/j.0254-0096.tynxb.2023-0973

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Acta Energiae Solaris Sinica ›› 2024, Vol. 45 ›› Issue (10) : 764-770. DOI: 10.19912/j.0254-0096.tynxb.2023-0973

STUDY ON HEAT TRANSFER PERFORMANCE OF GROUND HEAT EXCHANGERS WITH DIFFERENT PIPES CONSIDERING LAYERED STRATUM

Zhang Yuanyan, Tao Xiu, Chen Mou, Xia Chenyu, Xie Haiyan, Chen Feizhou

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Abstract

This study focuses on the vertical U-shaped ground source heat pump underground pipe heat exchanger. It takes into account the layered stratum and aims to design a composite pipe. The heat exchange performance of both traditional PE pipes and composite pipes is simulated and analyzed. Additionally, the layout of composite pipes and composite pipes + PE pipes is designed based on the energy efficiency coefficient of the section. The study further explores the heat exchange performance and economic aspects of these two arrangement types.The findings indicate that using composite pipes within buried pipe heat exchangers yields a substantial enhancement in heat transfer efficiency. Notably, the utilization of composite pipes within the lower segments of the water inlet and outlet pipe sections greatly augments the heat exchange capability.The utilization of composite pipes in the central and upper segments of the water outlet pipe section does not yield a significant enhancement in heat transfer performance. There is little difference in heat transfer performance between the arrangement of composite pipe + PE pipe and the layout solely consisting of composite pipe is minimal. However, the composite pipe + PE pipe configuration has less impact on of thermal short circuit between pipes and is to be a more economic.

Key words

ground source heat pumps / ground heat exchangers / heat transfer performance / layered stratum / composite pipes

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Zhang Yuanyan, Tao Xiu, Chen Mou, Xia Chenyu, Xie Haiyan, Chen Feizhou. STUDY ON HEAT TRANSFER PERFORMANCE OF GROUND HEAT EXCHANGERS WITH DIFFERENT PIPES CONSIDERING LAYERED STRATUM[J]. Acta Energiae Solaris Sinica. 2024, 45(10): 764-770 https://doi.org/10.19912/j.0254-0096.tynxb.2023-0973

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