地埋管井群全年非稳态换热特性研究  

Research on Unsteady Operating Characteristics of the Ground Source Heat Pump System

作　　者：王俊清[1] 袁艳平[1] 曹晓玲[1] 秦萍[1] 孙亮亮[1] 

机构地区：[1]西南交通大学机械工程学院,成都6100311

出　　处：《制冷与空调（四川）》2017年第3期317-323,共7页Refrigeration and Air Conditioning

基　　金：建筑环境与能源高效利用四川省青年科技创新研究团队项目(2015TD0015)

摘　　要：采取数值与解析计算相结合的方法,在构建井群地埋管换热器与地上热泵机组耦合模型的基础上,研究了动态负荷下土壤源热泵系统全年运行的非稳态特性。研究结果表明:各井换热量随空调冷/热负荷变化而上下波动,空调季各井平均壁温总体逐渐升高,采暖季各井平均壁温总体逐渐降低,但各井间存在一定差值;在过渡季各井平均壁温得到一定程度恢复,秋季至少恢复了8.5℃;机组COP随运行时间的持续,先是逐渐减小后趋于平稳;经过一年运行各井平均壁温最大温升为1.76℃,井群平均地温升高了0.93℃。Combining numerical and analytical calculation method, and on the basis of the establishment of wells buried tube heat exchanger and the heat pump coupling model to study the unsteady characteristics of ground source heat pump system under dynamic load throughout the year to run. Research indicates, heat exchange of all wells along with the air conditioning cold/heat load change and fluctuate, the average wall temperature of all wells increased in the air-conditioning season, the average wall temperature of each well of heating season reduce gradually, but there is a difference between the wells; the average wall temperature of each well in the transition season was recovered to some extent, and fall back to at least 8.5 ℃; the COP with the running time of the last, the first is gradually reduced, and then stabilized; after a year of operation, the maximum temperature rise of average wall temperature of each well is 1.76 ℃, the average temperature of well group increased by 0.93 ℃.

关 键 词：土壤源热泵 井群 地埋管传热模型 换热量 井壁温度 COP 

分 类 号：TK523[动力工程及工程热物理—热能工程]