一、引言 换热器的设计可分为性能评价(Rating)和定型(Sizing)二方面问题,然而评价方法与指标的研究不仅与性能密切有关,而且与几何尺寸及形状的定型有关,是换热器设计的首要问题。 随着“增强传热”技术的日益发展,流阻必然增大,阻力问题日益突出。热力学第二定 I. INTRODUCTION The design of heat exchangers can be divided into two aspects: performance evaluation and sizing. However, the research on evaluation methods and indexes is not only closely related to the performance but also related to the shaping of geometrical dimensions and shapes, The main problem of the design of the heater. With the “enhanced heat transfer” technology is growing, the flow resistance will inevitably increase, the problem of resistance has become increasingly prominent. The second set of thermodynamics