基于层换热理论的竖直地埋管换热器设计方法
Design of vertical ground heat exchangers based on a layer heat transfer theory
摘要：
建立了地源热泵竖直地埋管换热器的三维传热温度场数学模型，模拟计算了不同季节不同工况下地埋管换热器内的水温分布。提出了层换热理论，竖直地埋管换热器及其周围岩土可以分为三个换热层——饱和换热层、换热层、未换热层。通过实测验证了该层换热理论。介绍了地埋管换热器埋深的确定、出水管的保温及流量的确定等。
Abstract：
Establishes a mathematic model for threedimensional heat transfer temperature field of vertical ground heat exchanger of ground source heat pump systems. Simulates water temperature distribution in the ground heat exchanger under different conditions and seasons. Presents the layer heat transfer theory, in which the vertical ground heat exchanger and surrounding earth rock are divided into three heat transfer layers—full heat transfer layer, heat transfer layer and none heat transfer layer. Experimentally validates the layer heat transfer theory. Based on the theory, presents the design method of vertical ground heat exchangers including the determination of burial depth and flow rate and insulation of outflow tube.
Keywords:ground source heat pump, vertical ground heat exchanger, layer heat transfer theory, threedimensional heat transfer