Experimental Study of Low Temperature Waste Heat Power Generation System Based on R600a

Heat transfer efficiency is an important indicator of the waste heat power generation system and how to improve it is the focus of waste heat power generation system.In consideration of project actual situation,an organic refrigerant R600a is selected as working fluid of the waste heat power generation system in dealing with low temperature waste heat below 350 ℃ and then a low-temperature waste heat power generation system is build.Theoretical analysis indicates that there exists an optimum superheat value of the working fluid.When the fluid is working at the best superheat value,the maximum heat transfer efficiency will be reached.And method to control the superheat of the working fluid is found.By changing the frequency of refrigerant pump,the superheat of the working fluid,the variation of evaporator pressure,turbine speed and the voltage and current of generator are observed.The frequency corresponding to the best superheat value,which leads to the maximum heat transfer efficiency,is acquired in experiment.