摘要
地埋管换热器是地源热泵系统的核心组件,文中对基于线热源理论的地埋管换热器长度计算中的关键参数计算进行了讨论。将典型气象年数据应用在确定最热月、最冷月和地表面年平均温度上。引入平衡温度的概念,计算建筑物逐时负荷。进而提出由建筑物逐时负荷和水源热泵机组性能拟合曲线,计算地源热泵系统制冷运行系数和制热运行系数的方法。给出热泵机组最高进液温度、最低进液温度、钻孔热阻和土壤热阻等地埋管长度计算关键参数的选取、计算方法。最后提出垂直U形地埋管换热器长度计算步骤。
The geothermal heat exchanger is the key component of ground-coupled heat pump systems. We discuss the key parameters method of calculating geothermal heat exchanger length based on line-source theory. Typical meteorological year data is used to determine the hottest month, the coldest month and annual average surface temperature. The building hourly load can be obtained by introducing the concept of equilibrium temperature. The cooling fraction and the heating fraction then can be calculated using building hourly load and performance parameters curve-fit of a water source heat pump unit. The method for selecting the hottest and lowest entering fluid temperature and calculating the borehole and ground thermal resistance is given. A vertical U-tube heat exchanger length calculation procedure is proposed.
出处
《土木建筑与环境工程》
CSCD
北大核心
2009年第1期110-113,124,共5页
Journal of Civil,Architectural & Environment Engineering
基金
上海市重点学科建设项目(P1401)
关键词
地埋管地源热泵系统
地埋管换热器
典型气象年
平衡温度
ground-coupled heat pump system
geothermal heat exchanger
typical meteorological year
equilibrium temperature
