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Heat extraction capacity and heat-affected radius of deep U-shaped borehole heat exchanger in Xi'an
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Yuanhong Han1, Yuping Zhang1, Tinghui Zhang1, Jun Liu2, Yuze Xue1
Renewable Energy Resources | 2024, 42(5) : 620 - 626
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Renewable Energy Resources | 2024, 42(5): 620-626
Heat extraction capacity and heat-affected radius of deep U-shaped borehole heat exchanger in Xi'an
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Yuanhong Han1, Yuping Zhang1, Tinghui Zhang1, Jun Liu2, Yuze Xue1
Affiliations
  • 1 Key Laboratory of Coal Resources Exploration and Comprehensive Utilization Xi'an 710021 China
  • 2 School of Human Settlements and Civil Engineering Xi'an Jiaotong University Xi'an 710049 China
Published: 2024-05-20
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Deep borehole heat exchangers (DBHE) is currently recognized as the most environmentally friendly way to exploit geothermal energy. The deep Ushaped borehole heat exchanger is a new type of DBHE which is being explored. Heat extraction capacity and influence radius are the important problems in the process of popularizing this technology. Based on the measured parameters of ground temperature and thermophysical properties, the heat extraction capacity and influence radius of the 2 500 m deep Ushaped borehole heat exchanger are analyzed by the way of insitu test and numerical simulation in Caotan area of Xi'an. The results show that the sustainable heat extraction power of the heat exchanger in 30 years is closed to 750 kW, with an average linear meter of 144 W; The attenuation degree and range of wall rock temperature increase with the increase of heat extraction power; The influence radius of the deep Ushaped borehole heat exchanger are different at different depths, and the deep stratum is larger than the shallow stratum as a whole; The influence radius of the 2 500 m deep Ushaped borehole heat exchanger with the heat extraction rates of 750 kW can greater than 100 m after work for 30 years, and there is a certain degree of thermal interference between the inlet well and outlet well of the Deep Ushaped borehole exchanger.

geothermal energy  /  deep U-shaped borehole heat exchanger  /  heat extraction capacity  /  heat-affected radius
Yuanhong Han, Yuping Zhang, Tinghui Zhang, Jun Liu, Yuze Xue. Heat extraction capacity and heat-affected radius of deep U-shaped borehole heat exchanger in Xi'an[J]. Renewable Energy Resources, 2024 , 42 (5) : 620 -626 .
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  • Receive Date：2023-08-29
  • Online Date：2025-07-22
  • Published：2024-05-20
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  • Received：2023-08-29
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Affiliations
    1 Key Laboratory of Coal Resources Exploration and Comprehensive Utilization Xi'an 710021 China
    2 School of Human Settlements and Civil Engineering Xi'an Jiaotong University Xi'an 710049 China
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表12种不同金属材料的力学参数
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Number of
genus		 种数
Number of
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Percentage of
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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