地源热泵竖直地埋管动态负荷下换热特性解析分析方法
Analytical method for heat transfer characteristics of vertical ground heat exchangers in ground-source heat pump under dynamic load
摘要：
基于无限长线热源模型和负荷叠加原理，建立了竖直地埋管动态负荷下换热特性二维解析计算模型，预测了地埋管全年运行进、出口流体温度及周围岩土温度的分布，与已建立的地埋管全尺寸三维数值计算模型的计算结果进行了比较。结果表明，两种模型的计算结果基本吻合。
关键词：地埋管换热器,动态负荷,换热特性,解析计算,数值计算,无限长线热源模型,流体温度,岩土温度
Abstract：
Based on the infinite-length linear source model and the principle of load superposition, establishes a two-dimensional analytical model for heat transer characteristics under dynamic load to predict the whole year dynamic inlet and outlet temperature of a ground heat exchanger and the temperature distribution of the surronding soil. The predicted results are compared with those of a full scale three-dimensional CFD simulation developed perviously. The results show that the results of the two models are basically consistent.
Keywords:ground heat exchanger,dynamic load,heat transfer characteristic,analytical calculation,numerical calculation,infinite-length linear source model,fluid temperature,soil temperature