中深层U形地埋管地源热泵系统运行优化研究  

Operation optimization on middle-deep U-type buried pipe ground source heat pump systems

作　　者：申君豪 罗勇强 宋一笑 田志勇 邓杰文 郝峰 王健 Shen Junhao;Luo Yongqiang;Song Yixiao;Tian Zhiyong;Deng Jiewen;Hao Feng;Wang Jian(School of Environmental Science and Engineering,Huazhong University of Science and Technology;Shandong Huayi Green Ecology Development Co.,Ltd.)

机构地区：[1]华中科技大学环境科学与工程学院 [2]山东华翼绿色生态发展有限公司

出　　处：《制冷与空调》2024年第8期89-95,103,共8页Refrigeration and Air-Conditioning

摘　　要：建立中深层U形地埋管换热器的解析解模型,提出综合考虑建筑动态热负荷和地埋管换热器动态换热过程的中深层U形地埋管地源热泵系统运行优化模型,并利用该模型分析运行参数对地源热泵系统性能的影响。结果表明:在保证系统供热量相同的前提下,与定流量(110m^(3)/h)运行方式相比,采用变流量的运行方式可使热泵机组和循环水泵在2112h内的总耗电量由288423kW·h下降到224592kW·h,减少22.1%;随着回填材料导热系数增大,供热不足的情况出现的频率有所减小,供热保障率增大;垂直管段长度从2300m增大到2500 m,系统平均供热保障率从95.7%增大为98.8%,热泵机组平均COP从4.929增大为5.135;建筑热负荷的增大会使热泵机组COP近似线性减小,总耗电量增加。The analytical model for middle-deep U-type buried pipe heat exchangers is established.An operation optimization model is presented for middle-deep U-type buried pipe ground source heat pump systems,which comprehensively considers the dynamic heating loads of buildings and the dynamic heat transfer process of buried pipe heat exchanger.Using this model,the influence of operation parameters on the performance of ground source heat pump system is analyzed.The results show that under the premise of the same heating capacity of system,compared with the constant-flow-rate(110 m^(3)/h)operation mode,the variable-flow-rate operation mode reduces the total power consumption of the heat pump unit and water pump by 22.1%from 288423 kW.h to 224592 kW.h during 2112 hours of operation.As the thermal conductivity of backfill material increases,the frequency of heating shortage decreases,and the ratio of heating supply(RHS)increases.When the vertical pipe length increases from 2300 m to 2500 m,the average RHS of system increases from 95.7%to 98.8%,and the average COP of the heat pump unit increases from 4.929 to 5.135.With the increase of heating load of the building,the COP of the heat pump unit decreases linearly,while the total power consumption increases.

关 键 词：地源热泵 地埋管换热器 变流量 性能系数 解析解模型 

分 类 号：TB6[一般工业技术—制冷工程]