摘要
地埋管换热器是地温空调的重要组成部分,由于地下水流场的存在,热量在地埋管周围岩土体中的传递不只有热传导,还存在水动力场条件下的热对流、热弥散,因此地下水的渗流作用对地埋管换热器换热的影响不容忽视。通过野外原位试验和数值模拟方法对地埋管换热器的水热耦合进行数值模拟研究。结果表明:利用Feflow软件建立的地埋管换热器水热耦合模拟模型是可靠的;通过对比试验,在渗流?无渗流条件下地埋管系统运行48h时温度差为2.31℃,且渗流型地埋管系统的换热效率较无渗流型地埋管系统的换热效率高,可以用于工程推广。
A borehole heat exchanger is one of the important parts of geothermic air-conditioner. However, so far there has been little research about the effect of borehole heat exchangers. Because of the existence of the groundwater flow field,heat transfer in the surrounding rock and soil mass is not only by the way of thermal conduction, but also by the way of thermal convection and dispersion under the hydrodynamic field. This paper studies hydro-thermal coupling of the borehole heat exchangers by using in-situ test and numerical simulation and the conclusions are： the hydro-thermal coupling model established by the FE- FLOW software is reliable; the temperature difference between the systems with and without percolation after running 48 hours is 2.31℃. The thermal efficiency of the borehole heat exchanger system with perco- lation is higher than that without percolation, and the former one can be applied in engineering.
出处
《安全与环境工程》
CAS
2015年第4期16-21,27,共7页
Safety and Environmental Engineering
基金
中国地质调查局项目(1212011120159)
