结合闪蒸循环的有机朗肯循环以提升循环性能研究  

STUDY OF ORGANIC RANKINE CYCLE COMBINED WITH FLASH CYCLE TO IMPROVED CYCLE PERFORMANCE

作　　者：李新国[1] 高冠怡 吴晓松 弭慧惠 Li Xinguo;Gao Guanyi;Wu Xiaosong;Mi Huihui(School of Mechanical Engineering,Tianjin University,Tianjin 300350,China;CISDI Group Co.Ltd.,Chongqing 401122,China)

机构地区：[1]天津大学机械工程学院,天津300350 [2]中冶赛迪集团有限公司,重庆401122

出　　处：《太阳能学报》2021年第12期22-28,共7页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(51276122)。

摘　　要：以提高热源利用率,提升有机朗肯循环(ORC)的做功能力为目标,该文构建一种ORC的新构型——结合闪蒸循环的有机朗肯循环(ORFC)和结合喷射-闪蒸循环的有机朗肯循环(EORFC)。新构型循环相当于在ORC基础上,增加闪蒸循环,构成ORC+闪蒸循环的叠加循环。新构型中,通过增加(或调节)工质流量,以调节加热过程中的传热窄点(位置),从而提高从热源的吸热量并提高循环的输出功。结果表明:新构型循环的优化工况得到延伸,循环性能得到提高;ORFC和EORFC优化工况下的净输出功比ORC分别提高16.13%和33.18%,二者的加热量和效率均高于ORC。For improving the net power output of the organic Rankine cycle(ORC)by increasing the heat addition from heat source,this paper proposed the new configurations of ORC(organic Rankine cycle)combined with flash cycle(ORFC)and organic Rankine cycle combined with flash cycle with ejector(EORFC). By adding flash cycle to the ORC,combined cycles of ORC with flash cycle are built. In ORFC and EORFC,the mass flow rate of working fluids can be increased(or adjusted)to adjust the locations of the pinch point of heat transfer,and therefore,the heat addition from the heat source and the net power output of the cycle are increased. Simulation results show that the optimum conditions of the new configured cycles are extended and the performance is improved. The maximum net power output in the optimum conditions of ORFC and EORFC is 16.13% and 33.18% higher than that of the ORC,respectively. The heat addition rate and exergy efficiency of the new cycles are also higher than that of the ORC.

关 键 词：热力学 发电 余热利用 结合闪蒸循环的有机朗肯循环 结合喷射-闪蒸循环的有机朗肯循环 传热窄点调节 

分 类 号：TK115[动力工程及工程热物理—热能工程]