地源热泵垂直套管式换热器传热研究

介绍了地源热泵的特性及其发展前景，分析了现有传热模型的局限性。在V．C．Mei传热模型的基础上，结合系统能量方程和热传导方程建立了套管式换热器的传热模型。采用有限元法和有限差分法对埋管周围的温度场进行了数值计算。通过与实测值的对比表明该传热模型能更好地反映出真实的传热过程和传热机理。

Research on heat transfer of double-pipe heat exchanger for ground-source heat pumps

Presents the characteristics and prospects of ground-source heat pumps and analyses the limitation of existed heat transfer models. Based on the V. C. Mei model,together with the energy conservation equation and heat transfer equation,establishes the heat transfer model of double-pipe heat exchangers. Numerically calculates the temperature field around buried pipes using the finite element method and finite difference method. It is found that the heat transfer model accords with the real heat transfer process and mechanism better by comparing the calculating results with the test data.