能源工程2026，Vol.46Issue(4)：45-52,8.DOI:10.16189/j.nygc.2026.04.007
中深层U型井换热试验研究
Experimental study on heat exchange in medium-depth U-shaped wells
摘要
Abstract
In order to investigate the performance of the U-shaped well ground heat exchanger system and verify the feasibility of the U-shaped well ground heat exchange technology,a U-shaped well heat exchange test was established.The geological background of the test site area,including the strata,rock type,and ground temperature field data,was clarified.Open tests with different inlet water temperatures under constant flow rate and closed tests with different set heat extraction rates under constant flow rate were carried out to study the changes in the ground temperature field during the initial period,operation period,and recovery period.The fiber optic temperature measurement monitored the changes in the ground temperature field during the initial,operation,and recovery periods.The results showed that in the constant flow rate heat exchange test,the outlet water temperature was positively correlated with the inlet water temperature,and the heat exchange amount was negatively correlated with the inlet water temperature.In the constant temperature heat exchange test,the outlet water temperature was negatively correlated with the inlet water flow rate,and the heat exchange amount was positively correlated with the inlet water flow rate.The heat exchange process had a significant disturbance to the ground temperature field around the well,and the ground temperature field was affected by both the heat exchange method and the original ground temperature field during the heat exchange process.The research results can provide important references for the efficient development and utilization of geothermal resources and help optimize the design of ground heat exchanger systems.关键词
地热资源/中深层U型井/换热试验/光纤测温Key words
geothermal resources/medium-depth U-shaped wells/heat transfer test/optic fiber temperature measurement分类
天文与地球科学引用本文复制引用
王璐,王克,段晨阳..中深层U型井换热试验研究[J].能源工程,2026,46(4):45-52,8.基金项目
陕西省地质勘查基金项目(61201908332) （61201908332）
