Study On The Performance Of Liquid-gas Ejector

The lithium bromide absorption refrigerator is driven by hot source,and it has attracted more attention in recently,because of the two distinct characters:the use of environmentally friendly cryogen and the heat driving.Therefore,the lithium bromide absorption refrigeration technology has been improved greatly since the reform and opening up of our country.The lithium bromide aqueous solution absorb the water vapor in the absorber,which is the major component of an absorption refrigerator.Heat and mass transfer occur simultaneously in the absorption process,it is important for the system efficiency and the transfer area by increasing the heat and mass transfer driving force.Heat and mass transfer separation can be achieved by the liquid-gas ejector,and heat and mass transfer can be strengthened respectively.So,this type of absorber could improve the performance of absorption system.An experimental device was set up based on single-effect lithium bromide absorption refrigeration system.And the characteristics of convergent-divergent nozzles for flashing expansion of lithium bromide aqueous solution has been numerical studied Major work is as follows:1.Designing and setting the experimental device based on the single-effect lithium bromide absorption refrigeration system.2.Researching in the change of the nozzle's geometry size of the ejector which influence its flow performance.3.Studying on working parameter and the noncondensable gases which influence the pressure of inlet and the vapor frcation.