Performance Characteristics of Vapor-Liquid Injector Pressurized Organic Rankine Cycle
To address the issues of low efficiency and high power consumption of working fluid pumps used in small-scale organic Rankine cycle,the working fluid pump was replaced with a vapor-liquid injector as the pressurized equipment and a thermodynamic model of the vapor-liquid injector pressurized organic Rankine cycle(IORC)was established based on the one-dimensional model of the injector.Using 140℃ medium-low temperature heat source as the driving force and R245fa as the working fluid,the effects of three parameters,namely entrainment ratio of the injector,area ratio of the injector,and subcooling of the condenser outlet,on the performance of IORC were investigated,and the thermal performance of IORC was compared with that of basic organic Rankine cycle(BORC).The results showed that an optimal entrainment ratio and subcooling exist,which maximize the net power of IORC.The increase in entrainment ratio and area ratio will decrease the pressure lift of the injector,while the increase in subcooling will increase the pressure lift.The increase of these three parameters will lead to a decrease in the exergy efficiency of the injector and the heat exchanger economy.The heat exchanger economy of IORC is better than that of BORC,and when the working fluid pump efficiency is below 52％,IORC has more advantages in net power.
medium-low temperature heat sourcepower generationorganic Rankine cyclevapor-liquid injectorcycle characteristic
万方数据
维普
