摘要
为确定地下水渗流对土壤源热泵地埋管换热器周围温度场的影响,以U型地埋管换热器传热系统为例,构建了等效当量直径的单管圆柱换热器传热物理和数学模型,并用多物理场耦合分析软件COMSOLMultiphysics 4.2a对夏季工况下地埋管换热器周围温度场进行数值模拟计算,通过有无渗流条件下不同导热系数、孔隙率土壤温度场变化的对比分析,确定引起温度场变化的主导因素,为下一步试验提供了重要依据。
Taking U-type ground heat exchanger system for an example, physical and mathematical models of single tube cylindrical heat exchanger with equivalent diameter are establish to determine the impact of groundwater seepage on ambient temperature field of buried penstock geothermal heat pump exchanger. Under summer operating condition, ambi- ent temperature field of buried penstock heat exchanger is simulated by using the tool of COMSOL Multiphysics 4.2a. Comparative analysis of different thermal conductivity and soil temperature field variation of porosity with and without seepage, the dominant factors of temperature field variation is determined and the theoretical basis for further experiment is provided.
出处
《水电能源科学》
北大核心
2012年第12期117-119,110,共4页
Water Resources and Power
关键词
地下水渗流
土壤源热泵
地埋管换热器
周围温度场
热渗耦合
groundwater seepage
ground source heat pump
geothermal heat exchanger
ambient temperature field
coupled thermal seepage
