摘要
在线热源理论的基础上,建立了土壤耦合热泵系统地下埋管换热器传热的数学模型,模拟分析了土壤的初始温度、盘管的入口水温、盘管流体流速及运行工况等因素对土壤耦合热泵系统地下埋管换热器单井埋深的影响 ;提出了以盘管内流体温度梯度和单位管长换热量为判定依据的确定地下埋管换热器单井埋深的方法。
The mathematic model of geothermal heat exchanger in ground-coupled heat pump system is estab-lished based on the line heat source theory in this paper. The factors affect the buried depth of ground heat exchanger areanalyzed and simulated. These factors include the initial temperature, inlet water temperature of pipe, the fluid velocity,the operation conditions and so on. Besides, the method according as the fluid temperature gradient in U tube and heatflux to determinate the buried depth of the ground heat exchanger is presented.
出处
《制冷空调与电力机械》
2003年第6期5-9,共5页
Refrigeration Air Conditioning & Electric Power Machinery
基金
国家自然科学基金资助项目:NO.50378024
关键词
土壤耦合热泵系统
地下埋管
换热器
数学模型
盘管
传热
ground coupled heat pump system
ground heat exchanger
equivalent diameter
fluid temperature gradient
heat flux of unit pipe length
