间歇运行对U形地埋管换热器换热特性的影响  

Effect of Intermittent Operation on Thermal Performance of Heat Exchanger with U Shape Buried Pipe

作　　者：袁艳平[1] 雷波[1] 曹晓玲[1] 杨从辉[1] 

机构地区：[1]西南交通大学机械工程学院,四川成都610031

出　　处：《西南交通大学学报》2010年第3期393-399,共7页Journal of Southwest Jiaotong University

基　　金：中国博士后面上基金资助项目(20080431241);四川省青年科技基金资助项目(09ZQ026-076);北京市重点实验室开放课题(2008K09);中央高校基本科研业务费专项资金资助(SWJTU09ZT09);西南交通大学科学研究基金项目(2008B17)

摘　　要：为研究间歇运行对U形地埋管换热器换热特性的影响,以钻孔壁为界,将计算区域分为钻孔内和钻孔外两个部分,分别采用稳态导热解析计算模型和非稳态导热数值计算模型.分析了办公楼、商场和居住建筑3种间歇模式下的换热特性.在各种模式下运行1个月的计算结果表明,3种间歇运行模式比连续运行模式的换热量分别高45.57%,58.43%和88.05%,其中居住建筑运行模式下的换热量和钻孔壁面平均温度恢复最好.A heat transfer model for heat exchanger was derived to investigate the effects of intermittent operations on the thermal performance of a heat exchanger with U shape buried pipes.In the model,the calculation area was divided into two parts,one in the borehole and the other outside the borehole,with the borehole wall as the boundary,a steady heat transfer model and a numerical unsteady heat transfer model were applied respectively.Three intermittent operation modes were defined as those of office building,shopping mall and residential building.The calculation results indicated that after one month operation,the heat fluxes under the three modes increased by 45.57%,58.43% and 88.05%,respectively,compared with a continuous operation mode,and the largest restoration of heat flux and average temperature were under the residential building mode.

关 键 词：地源热泵 U形地埋管换热器 间歇运行 恢复特性 

分 类 号：TK529[动力工程及工程热物理—热能工程]