【摘要】 讨论垂直埋管地源热泵地热换热器的传热模型 ,给出了一维圆柱面模型的解析解。将该解析解与目前常用的线源模型解做了比较 ,指明了线源模型的适用条件 ;与常热流半无限大平壁解的比较 ,得到了小傅里叶数时该解析解的近似公式。更多还原

【Abstract】 The heat transfer of a vertical borehole is discussed for geothermal heat exchangers.An explicit analytical solution is given in terms of the one-dimensional cylinder model.The solution of the simplified line-source model is compared with that of the cylinder model,and the limitation for its application has been determined.In comparison with the semi-infinite plate model,another approximate expression of the cylinder model has been obtained,which is simple and suited better to short times.更多还原