人工流场影响下地埋管管群换热的模拟研究  

Simulation Study on Heat Transfer of Buried Pipe Banks Under the Influence of Artificial Flow Field

作　　者：赵军[1] 张志英[1] 刘九龙 李扬[1] 孙铁[3] Zhao Jun;Zhang Zhiying;Liu Jiulong;Li Yang;Sun Tie(School of Mechanical Engineering,Tianjin University,Tianjin 300072,China;Institute of Comprehensive Geology,Tianjin Geothermal Exploration and Development-Designing Institute,Tianjin 300250,China;Tianjin Branch of China Institute of Geotechnical Investigation and Surveying Company Limited,Tianjin 300120,China)

机构地区：[1]天津大学机械工程学院,天津300072 [2]天津地热勘察开发设计院综合地质研究所,天津300250 [3]建设综合勘察研究设计院有限公司天津分院,天津300120

出　　处：《天津大学学报（自然科学与工程技术版）》2016年第8期835-840,共6页Journal of Tianjin University：Science and Technology

基　　金：国家科技支撑计划资助项目(2013BAJ09B04)

摘　　要：针对地源热泵系统运行时出现的地埋管周围冷热量堆积的问题,提出了在地埋管管群两侧加抽水井和回灌井来产生人工流场,从而强化地埋管管群换热效果的方法.通过FEFLOW软件模拟了人工流场影响下地埋管的换热,对单个地埋管的换热进行了单因素敏感性分析,模拟了水井数量以及流场切换时间对地埋管管群换热效果的影响.结果表明:在选定工况下,加入人工流场后地埋管的换热量较无流场时均有较大提高,其中单个地埋管在流场定期切换与不切换情况下的换热量可较无流场时分别提高54.06%,和69.67%,;设置有1组水井、2组水井、3组水井的地埋管管群的平均换热量与无人工流场时相比分别提高了9.89%,、21.54%,和33.00%,;人工流场的切换时间越长,地埋管管群的换热效果越好,但随着切换时间的增长,平均换热量提高的幅度减小.With the running of ground source heat pumps,the cold or heat accumulates around the buried pipes.Asfor the problem,a solution that adds pumping well and recharge well on either side of buried pipe banks in order toenhance the heat transfer of buried pipe banks was put forward.FEFLOW software was used to simulate the heattransfer of buried pipe banks under artificial flow condition.Single factor sensitivity analysis for one buried pipe wasconducted.For buried pipe banks,numbers and the switching time interval of artificial flow were taken into account.The results show that:with artificial flow,the heat transfer amount always has a larger increase comparedwith no flow.For single buried pipe,the heat transfer amount improves 54.06%, and 69.67%, respectively in the conditionsof flow direction switching periodically and no flow direction switching.In comparison with no flow,theaverage heat transfer amount of buried pipe banks improves 9.89%,,21.54%, and 33.00%, respectively in the conditionsof one group of wells,two groups of wells and three groups of wells.The longer the switching time interval ofartificial flow,the higher the heat exchange amount,but with the growth of the switching time interval,the growthrate of average heat transfer amount decreases.

关 键 词：人工流场 地源热泵 FEFLOW 地埋管管群 单因素敏感性分析 

分 类 号：TK529[动力工程及工程热物理—热能工程]