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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。
Introduced the characteristics of ground source heat pump and its development prospects, analyzed the limitations of the existing heat transfer model. Based on the V.C.Mei heat transfer model, the heat transfer model of the bushing heat exchanger is established based on the system energy equation and heat conduction equation. The temperature field around the pipe was numerically calculated by finite element method and finite difference method. The comparison with the measured data shows that the heat transfer model can better reflect the true heat transfer process and heat transfer mechanism.