Investigation of the Heat Transfer Performance of Multi-Borehole Double-Pipe Heat Exchangers in Medium-Shallow Strata

Wenjing Li, Wenke Zhang, Zhenxing Li, Haiqing Yao, Ping Cui and Fangfang Zhang
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Wenjing Li: School of Thermal Engineering, Shandong Jianzhu University, Jinan 250101, China
Wenke Zhang: School of Thermal Engineering, Shandong Jianzhu University, Jinan 250101, China
Zhenxing Li: Hydrogeology Bureau of China National Administration of Coal Geology, Handan 056004, China
Haiqing Yao: Shandong Zhongrui New Energy Technology Co., Ltd., Jinan 250101, China
Ping Cui: School of Thermal Engineering, Shandong Jianzhu University, Jinan 250101, China
Fangfang Zhang: School of Thermal Engineering, Shandong Jianzhu University, Jinan 250101, China

Energies, 2022, vol. 15, issue 13, 1-19

Abstract: Just as the double-pipe heat exchanger is being utilized in an increasing number of applications, its research content is also deepening. For this paper, based on the air-conditioning cold and heat source project of a building in Handan, Hebei Province, a 300-meter medium-shallow well double-pipe heat exchanger was used for heating and cooling, and a corresponding heat transfer model was established. The changes of parameters such as the inlet and outlet temperature, heat exchange (with and without a temperature gradient), and borehole wall temperature distribution between a single borehole, double boreholes, and four boreholes over one year in medium-shallow wells were simulated and analyzed. By comparing the obtained experimental data and the simulation data, the accuracy of the heat transfer model was verified. This provides a theoretical basis for the further advancement of the project and lays the foundation for an in-depth study of multi-borehole double-pipe heat exchangers.

Keywords: middle-shallow layer; double-pipe; buried tube heat exchanger; multi-borehole; heat transfer; heating and cooling (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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