采集凝固热热泵技术凝固及换热性能的理论分析

介绍了一种新型的采集凝固热热泵技术,建立了凝固热采集装置中层流流动水在常壁温条件下的管内凝固问题的数学模型。采用准稳态近似方法进行了凝固特性的分析,使用当量平均表面换热系数和潜热显热比两个参数讨论了冰层对换热性能的影响。计算结果与所得结论对凝固热采集装置的设计和热泵系统性能的改善有一定指导作用。

THEORETICAL ANALYSIS ON CHARACTERISTICS OF FREEZING AND PERFORMANCE OF HEAT TRANSFER IN HEAT PUMP SYSTEM WITH FREEZING LATENT HEAT COLLECTION

A new heat pump system with freezing heat collection was brought forward.Theoretical model on the freezing of laminar flow in the pipe at constant wall temperature were presented for the freezing heat collection device.On the basis of quasi-steady approximate method,the problem of freezing was analyzed,and the influence of the ice to the heat transfer performance was discussed by the two parameters which are the equivalent average surface heat transfer coefficient and the ratio of latent heat to sensible heat.The results and conclusions are useful to the design of the freezing heat collection de- vice and the improvement of system performance.