微肋管内制冷剂流动沸腾换热研究进展

A Review of Flow Boiling Heat Transfer in Microfin Tubes

内微肋管是增强管内凝结与沸腾换热的重要技术之一,在制冷空调领域有着广泛的应用。本文基于对近年文献回顾,从实验和计算关联式两方面综述了微肋管中沸腾换热的研究现状,总结了质量流速、热流密度、干度、管道结构、润滑油等对换热系数和压降的影响,讨论了现有的沸腾换热关联式的适用性和准确性,并指出了需要进一步研究的问题。

Microfin tubes widely used in the refrigeration and air conditioning play an important role in enhancing the condensation and e- vaporation heat transfer. Experimental research and empirical correlations of flow boiling heat transfer in microfin tubes was reviewed based on the published papers. Effects of mass flow rate, heat flux, vapor quality, tube construction and lubricants on heat transfer coefficients and pressure drops were showed through analyzing the experimental resuhs in previous studies. The applicability and accuracy of boiling heat transfer correlations in microfin tubes are discussed in the paper. Moreover, further research work for boiling heat transfer is pro- posed.