新型槽式太阳能耦合CO_(2)跨临界朗肯循环发电系统性能研究  

PERFORMANCE STUDY OF NOVEL THROUGH SOLAR CONCENTRATOR COUPLED CO_(2) TRANSCRITICAL RANKINE CYCLE POWER GENERATION SYSTEMS

作　　者：杨俊兰 李梦希 韩一飞 王天宇 张凯钰 Yang Junlan;Li Mengxi;Han Yifei;Wang Tianyu;Zhang Kaiyu(School of Energy and Safety Engineering,Tianjin Chengjian University,Tianjin 300384,China)

机构地区：[1]天津城建大学能源与安全工程学院,天津300384

出　　处：《太阳能学报》2025年第2期488-495,共8页Acta Energiae Solaris Sinica

基　　金：天津市科技特派员项目(22YDTPJC00020);天津市教委项目(2019KJ113)。

摘　　要：为研究太阳能热在朗肯循环发电系统中的利用,将双级压缩中间再热CO_(2)跨临界朗肯循环(DSRRC)、联合抽气回热/内回热CO_(2)跨临界朗肯循环(CRIRC)以及自冷凝CO_(2)跨临界朗肯循环系统(SCRC)分别与太阳能集热与储热子系统进行耦合,建立热力学模型,分析运行参数对发电系统热力性能的影响。结合该文系统及所给条件表明,3个系统在热效率最大处存在最优汽轮机入口压力,分别为15.0、21.5和23.0 MPa;3个系统的热效率和系统效率随着汽轮机入口温度的升高而不断增大;与CRIRC和SCRC相比,DSRRC的最大净输出功率随汽轮机入口压力的增加分别提高了34.0%和68.5%;分流比从0.1增加至0.5会使DSRRC的净输出功率较CRIRC和SCRC分别提高35.4%和72.0%。In order to study the utilization of solar heat in Rankine cycle power generation systems,the two-stage compression intermediate reheat CO_(2) transcritical Rankine cycle(DSRRC),the combined pumped reheat/internal reheat CO_(2) transcritical Rankine cycle(CRIRC),and the self-condensing CO_(2) transcritical Rankine cycle system(SCRC)are coupled with the solar collector and storage subsystems,respectively,and a thermodynamic model is developed to analyze the effects of the operating parameters on the thermal performance of the power generation system.Combining the conditions given for the systems in this paper shows that there exists an optimal turbine inlet pressure at the maximum thermal efficiency for the three systems,which are 15.0,21.5,and 23.0 MPa,respectively;The thermal efficiency and exergy efficiency of the three systems increase continuously with the increase of the turbine inlet temperature;The maximum net output power of the DSRRC is increased by 34.0%and 68.5%,respectively,compared with that of the CRIRC and SCRC;And an increase of the shunt ratio from 0.1 to 0.5 increases the net output power of DSRRC by 35.4%and 72%compared to CRIRC and SCRC,respectively.

关 键 词：太阳能 热力学分析 CO_(2)跨临界循环 朗肯循环 

分 类 号：TK51[动力工程及工程热物理—热能工程]