Experimental study of the effects of alcohol additives in lithium bromide water pool absorbers.

摘要

It is well known that interfacial turbulence enhances the transport of mass across vapor-liquid or liquid-liquid interfaces. In absorption heat pumps and air conditioners, mass transfer processes occur in the absorber and in the generator. The coefficients of performance and capacities of these machines depend in large part on the efficiency of the absorber component of the cycle. It is common practice to include chemical additives in the charge of these machines. Some additives control corrosion, and others enhance heat and mass transfer in the absorber size. Compared with other enhancement techniques, additives are one of the most cost-effective ways to increase absorber capacity. Although the effectiveness of some additives is beyond doubt the degree to which they are effective, the time period within which they remain effective, and the reasons for their positive effect on absorber performance are not well established. Two possible explanations for this state of affairs are that the data presented in the literature are few and that the effects of some important parameters are not systematically studied. The objective of this work is to investigate the effects of some of these parameters, such as how the initial concentration of the LiBr solution affects the mass absorption, and how four alcohol additives affect absorption enhancement. 4 refs., 6 figs.