地埋管地源热泵地埋管管径的选取
Selection of pipe diameter for ground-source heat pump system
摘要：
详细阐述了地埋管管径对水泵能耗和地埋管换热性能的影响，在地埋管内水流量一定的情况下，选取5种不同管径进行了分析。结果显示，适当增大地埋管管径可减小流体在地埋管内流动时的沿程阻力，降低水泵运行能耗；减小地埋管管径可以增强地埋管内循环水与管壁的对流换热。应该综合考虑，确定最佳管径。
Abstract：
Analyses the influence of pipe diameter on the energy consumption of the water pump and the ground heat exchanger performance in detail. Selects five kinds of different pipe diameter to analyse on the condition of the constant water flow in pipe. The results show that an appropriate increase in pipe diameter can reduce the frictional resistance caused by water flowing in pipe, and reduce the energy consumption of the water pump; a decrease in pipe diameter can enhance the convection heat transfer between the circulating water and the pipe wall. A comprehensive consideration should be given to determining an optimal pipe diameter.
Keywords:ground-source heat pump, pipe diameter, water pump, energy consumption, heat transfer