表面活性剂对溴化锂吸收式制冷机吸收过程强化机理的研究概况

吸收式制冷技术具有环保、节电和利用余热等不可替代的优点，在我国应用广范。溴化锂机组的吸收器是系统中换热面积最大、成本最高的换热部件，采用添加剂强化吸收器传热传质是一种不可缺少的手段。但是添加剂的强化机理却一直没有研究清楚，各国对添加剂的强化机理的研究很重视，已经有了不少研究成果，本文对国外添加剂对溴化锂制冷机吸收器的强化机理的研究进行简要介绍和分析。

THE STUDY REVIEW OF HEAT AND MASS TRANSFER MECHANISM ENHANCEMENT BY ADDITIVE IN ABSORPTION REFRIGERATION ABSORBER

The most crucial and expensive component in commercial absorption machines is the absorber, where the water vapor is absorbed into aqueous lithium bromide solution, a fundmental step in absorption refrigeration. When the liquid film is laminar, the heat and mass transfer coefficient is low. Some additive can significantly improve the heat and mass transfer coefficient, so it is widely used in commercial absorption machines. The additives can induce Marangoni convection which can be observed in many experiments, but the flow activety has never been satisfactorily explained. The study of the mechnism of additives is studied by scientists from many contries, they have put forward different theories to explain this machanism. In this paper, some these theories are introduced to help the designing and study of refrigeration.