STUDY ON HEAT TRANSFER EFFECT OF SINGLE U-SHAPED BURIED PIPE HEAT EXCHANGER IN KARST AREA

Yang Bin; Pei Peng; Luo Tingting; Hao Dingyi; Wang Chen

doi:10.19912/j.0254-0096.tynxb.2021-0602

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (12) : 510-519. DOI: 10.19912/j.0254-0096.tynxb.2021-0602

STUDY ON HEAT TRANSFER EFFECT OF SINGLE U-SHAPED BURIED PIPE HEAT EXCHANGER IN KARST AREA

Yang Bin¹, Pei Peng¹, Luo Tingting¹, Hao Dingyi², Wang Chen¹

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Abstract

Due to the abundant groundwater in the karst area of south China,the heat transfer capacity of buried pipes can be improved by seepage of multiple aquifers. In this paper,the three-dimensional numerical model of a single U-shaped heat transfer hole was established by using finite element software,and the heat transfer effect of the ground source heat pump system with or without aquifer was analyzed respectively by relevant indexes. The results show that the average outlet temperature of U-shaped pipe shows N1>A1>A2>AF1>AF2 when there is no aquifer in the energy storage rock and soil. The average heat transfer rate per meter under the condition of AF2, AF1,A2 and A1 is 49.87%,44.06%,39.51% and 31.93% higher than that in N1 respectively. The average COP of AF2,AF1,A2 and A1 is 4.35%,3.93%,3.52% and 2.67% higher than that of N1 respectively. Heat exchange holes should be reasonably arranged in areas with abundant groundwater to improve the operating efficiency of the heat pump system. This work can provide certain guidance for practical engineering projects.

Key words

ground source heat pump / heat exchanger / groundwater seeoage / fracture water flow / coefficient of performance

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Yang Bin, Pei Peng, Luo Tingting, Hao Dingyi, Wang Chen. STUDY ON HEAT TRANSFER EFFECT OF SINGLE U-SHAPED BURIED PIPE HEAT EXCHANGER IN KARST AREA[J]. Acta Energiae Solaris Sinica. 2022, 43(12): 510-519 https://doi.org/10.19912/j.0254-0096.tynxb.2021-0602

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