Study On Dynamic Character Of Libr Absorption Refrigeration Cycle Driven By Solar Energy

It is well known that the dynamic characteristic is the basic character of lithium-bromide absorption chiller and it is also of the main contents of controlling system,the unsteady condition of absorption chiller is that kind of condition ,which departs from the rated point with a little disturbing factor.Therefore,the research aim of the dynamic characteristics of absorption chiller should be the disturbing characteristics induced from steady congdition.Besides this ,the characteristics parameters for unit control of each parameter under all kinds of disturbing factor should be another aim,so that the designing reasons of controlling system can be provided.In this paper,the disturbing characteristic of absorption chiller driven by solar energy have been researched,It can be classified into two aspects:Firstly,the mass&heat coupling relationships among six components of absorption chiller driven by solar energy are analyzed.The dynamic mathematical models of each components have been construsted,and their detailed solution methods are presented,Based upon above ideas ,the dynamic model of the whole system of absorption chiller driven by solar energy is constructed.and is solved numerically. It have been analyzed that the characteristic 0f flow rate&inlet tempreture of cooling waterand cold water and the characteristic of the tempeture of the heat resourse,which are the effects on all components and the whole unit.According to the analysis ,the trend and of each parameter under all those disturbing factors have been presented .Secondly ,in order to validate the calculated data,the dynamic characteristic experimental setup was constructed using a single-effect absorption chiller to investigate its start-up &close .And the effect on the whole unit ang all components of cold water pump, the degree of vacuumAnd the tempeture of heat resourse and the flow rate&inlet tempeture of cooling water and cold water.The experimental results show that the experimental results accord with the result of simulation.