可再生能源2025，Vol.43Issue(7)：896-901,6.
加深式浅层土壤垂直埋管换热器换热效能分析
Analysis of heat exchanger efficiency of the deepened vertical ground heat exchanger in shallow soil
摘要
Abstract
To analyze the thermal short circuit degree and heat transfer efficiency of the buried pipe under different buried depths,this paper establishes a three-dimensional dynamic simulation model of the deepened buried pipe ground source heat pump system,and simulates and analyzes the heat transfer performance of the buried pipe at different burial depths.The results show that the heat exchange efficiency of the buried pipe continuously decreases along the flow direction of the circulating medium.Moreover,the decrease amplitude in the inlet pipe is greater than that in the water outlet pipe,and the decrease amplitude decreases as the buried depth increases.When the buried depth is 60～300 m,the heat exchange rate of the buried pipe decreases by an average of 0.145～0.046 kW and 0.035～0.016 kW every 20 m in the inlet and outlet pipes.The total heat exchange rate of the buried pipe increases with the increase of the buried depth,while the heat exchange rate per unit buried depth shows the opposite trend.When the buried depth increases from 60 m to 300 m with a range of 60 m,the total heat extraction rate of the buried pipe with an inlet temperature of 2℃increases by 62.94%,25.27%,11.24%,8.55%,and the heat exchange rate per unit buried depth decreases from 28.33 W/m to 23.08,19.28,16.08,13.97 W/m.Compared with a buried depth of 60 m,the thermal short circuit imbalance coefficient increases by 20.39%,43.40%,64.33%and 81.15%when the buried depth is 120,180,240 and 300 m,respectively.关键词
加深式地埋管/地源热泵/埋深/热短路/换热效能Key words
deepened buried pipe/ground source heat pump/buried depth/thermal short-circuiting/heat exchange efficiency分类
能源科技引用本文复制引用
郭新锋,王天任,王延欣,王滋樟,李昊,王令宝,卜宪标..加深式浅层土壤垂直埋管换热器换热效能分析[J].可再生能源,2025,43(7):896-901,6.基金项目
中国石化集团科技部项目(KLJP24027). （KLJP24027）
