地下水渗流条件下埋地换热器传热性能的实验研究  

EXPERIMENTAL STUDY OF HEAT TRANSFER PERFORMANCE OF BOREHOLE HEAT EXCHANGER WITH GROUNDWATER FLOW

作　　者：王华军[1] 齐承英[1] 杜红普[1] 顾吉浩[1] 

机构地区：[1]河北工业大学能源与环境工程学院,天津300401

出　　处：《太阳能学报》2010年第12期1610-1614,共5页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(No.50906020);天津市应用基础及前沿技术研究计划(10JCYBJC08500)

摘　　要：建立了根据地温分布确定地下水流动特性的简化数学模型。针对一个实际工程钻孔进行了地温分布测量,并测试了局部地下水渗流条件下埋地换热器的传热性能。结果表明,上述理论模型具有较好的预测精度。在该文实验条件下,地下水渗流对埋地换热器的传热性能具有明显的强化作用,埋地换热器的换热量平均提高11.35%。A simplified theoretical model was presented to determine the characteristics of groundwater flow based on the ground temperature profile. Aiming at a practical borehole, its ground temperature profile was measured, and the thermal performance of borehole heat exchanger（BHE） with local groundwater flow was tested. Results showed that the above theoretical model had good accuracy on predicting the groundwater velocity. In the present conditions, the groundwater flow had an obvious enhanced effect on the heat transfer performance of BHE, and the thermal performance of BItE was enhanced by 11.35 % on average. This result will be helpful for the design of ground source heat pump system at similar geological areas.

关 键 词：地源热泵 埋地换热器 地下水流动 传热性能 地温分布 

分 类 号：TK124[动力工程及工程热物理—工程热物理]