基于S-CO_(2)布雷顿循环的太阳能发电储能一体化系统性能分析  

Performance Analysis of an Integrated Solar Power Generation and Storage System Based on the S-CO_(2)Brayton Cycle

作　　者：张学镭[1] 梁建雄 王普 赵哲[1] 贾程广 ZHANG Xuelei;LIANG Jianxiong;WANG Pu;ZHAO Zhe;JIA Chengguang(Hebei Key Laboratory of Low Carbon and High Efficiency Power Generation Technology,North China Electric Power University,Baoding 071003,Hebei Province,China)

机构地区：[1]华北电力大学河北省低碳高效发电技术重点实验室,河北保定071003

出　　处：《动力工程学报》2024年第8期1205-1215,共11页Journal of Chinese Society of Power Engineering

基　　金：国家重点研发计划资助项目(2018YFB0604302)。

摘　　要：设计了一种以S-CO_(2)和石英石为储能介质、再压缩S-CO_(2)布雷顿循环为动力循环的塔式太阳能热发电储能一体化系统。基于Gensystem计算平台,建立了动力循环、太阳能集热系统、S-CO_(2)斜温层储热罐的数学模型,研究了集热系统性能和S-CO_(2)斜温层储热罐的储、释热动态特性。在此基础上,分析了一体化系统的热力性能和经济性能。结果表明:经过13次循环储、释热过程,斜温层储热罐出口温度趋于稳定。释热结束时,斜温层储热罐热流体出口温度下降了63 K,储热结束时,冷流体出口温度升高了46 K。与配置双储热罐的塔式太阳能热发电系统相比,一体化系统夏至日和冬至日日均发电效率分别提高了1.8%和1.7%,系统总投资降低了9.46%,平准化度电成本下降了9.45%,投资回收期缩短了1.8 a。This paper proposed an integrated system which includes a tower-type solar thermal power system and energy storage system,employing S-CO_(2)and quartz as the storage media and a re-compressed S-CO_(2)Brayton cycle as the power cycle.Based on the Gensystem platform,mathematical models of the power cycle,solar heat collection system,and S-CO_(2)thermocline storage tank were developed to investigate the performance of the heat collection system and the dynamic characteristics of heat storage and release in the S-CO_(2)thermocline storage tank.This foundation facilitated an analysis of the integrated system's thermodynamic and economic performance.Results show that after 13 cycles of heat storage and release,the temperature at the outlet of the thermocline storage tank tends to be stable.At the conclusion of heat release,the temperature of the thermal fluid exiting the tank is decreased by 63 K,while at the end of heat storage,the temperature of the cold fluid exiting is increased by 46 K.Compared with a dual storage tank tower solar thermal power system,the average daily power generation efficiency on the summer solstice and winter solstice is enhanced by 1.8%and 1.7%,respectively.The total system investment is reduced by 9.46%,the levelized cost of electricity is reduced by 9.45%,and the investment payback period is shortened by 1.8 years.

关 键 词：太阳能 布雷顿循环 斜温层 超临界二氧化碳 储能 

分 类 号：TK2[动力工程及工程热物理—动力机械及工程]