STUDY ON COMPREHENSIVE HEAT TRANSFER PERFORMANCE OF DEEP-BURIED PIPES FOR MEDIUM-DEEP GEOTHERMAL ENERGY UTILIZATION

Jiang Chao; Wu Jiale; Li Chao; Xu Jiamin; Wang Jiachen; Guan Yanling

doi:10.19912/j.0254-0096.tynxb.2025-0508

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (8) : 32-38. DOI: 10.19912/j.0254-0096.tynxb.2025-0508

STUDY ON COMPREHENSIVE HEAT TRANSFER PERFORMANCE OF DEEP-BURIED PIPES FOR MEDIUM-DEEP GEOTHERMAL ENERGY UTILIZATION

Jiang Chao¹, Wu Jiale¹, Li Chao², Xu Jiamin², Wang Jiachen¹, Guan Yanling¹

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Abstract

The deep-buried closed-loop geothermal heat transfer system is a primary form of utilizing geothermal energy from the middle and deep layers of the Earth. The heat transfer efficiency of the system is comprehensively influenced by the depth of buried pipes, as well as the energy consumption of water pumps and heat pumps. This study, based on a sleeve-type deep-buried pipe heat transfer project in Xi’an, established three-dimensional full-scale numerical models for pipes buried at depths of 2039, 2539, 3039, and 3539 m. The models simulated heat extraction from the buried pipes and the energy consumption of water pumps and heat pumps over 121 days. The investigation aims to explore the comprehensive heat transfer performance of deep-buried pipes. The results indicate that considering pump consumption, the comprehensive heat transfer intensity of buried pipes shows an approximate linear increasing trend with depth, and the maximum difference with the net heat transfer power of buried pipes does not exceed 1.5%.

Key words

geothermal energy / heat exchangers / heat transfer / boreholes / numerical methods / deep-buried pipe heat transfer / energy consumption

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Jiang Chao, Wu Jiale, Li Chao, Xu Jiamin, Wang Jiachen, Guan Yanling. STUDY ON COMPREHENSIVE HEAT TRANSFER PERFORMANCE OF DEEP-BURIED PIPES FOR MEDIUM-DEEP GEOTHERMAL ENERGY UTILIZATION[J]. Acta Energiae Solaris Sinica. 2026, 47(8): 32-38 https://doi.org/10.19912/j.0254-0096.tynxb.2025-0508

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