摘要
本文以变热流条件下的圆柱源理论为基础,并引入"形状因子"的概念,通过地下埋管换热器的出口水温关联热泵机组和埋管换热器的运行特性,建立起耦合地下埋管换热器和热泵机组运行特性的R134a垂直单U型管土壤源热泵系统模拟模型。对土壤源热泵系统夏季供冷时的间歇工况进行模拟和实验验证。结果表明:模拟值与实验值吻合度较高。此模型对土壤源热泵系统的设计以及能量分析具有指导意义。
The operation performance of the heat pump unit and underground loop heat exchanger was related through the outlet circular fluid temperatures of underground heat exchanger based on the cylindrical source theory at varied heat flux condition and the concept of ＂shape factor＂. The simulation model that coupling the operation performance of the heat pump unit and underground heat exchanger of R134a vertical single U-tube geothermal heat pump systems was built. The intermittent cooling experiment in summer was carried through on the heat pump systems and modeled utilize the established simulation model, and the result of the simulation is much close to the experimental result. The simulation model has guidance meaning on design and energy consumption analysis of the geothermal heat pump systems.
出处
《建筑热能通风空调》
2007年第4期37-40,共4页
Building Energy & Environment
基金
河北省博士基金资助项目(04547007D-3)
关键词
土壤源热泵
圆柱源理论
模拟模型
ground-coupled heat pump, cylindrical source theory, simulation model
