S-CO_(2)布雷顿循环太阳能电力淡水系统(火用)分析  

EXERGY ANALYSIS OF S-CO_(2) BRAYTON CYCLE SOLAR SYSTEM FOR ELECTRICITY AND FRESH WATER PRODUCTIONS

作　　者：王刚[1] 董博祎 姜铁骝[1] 陈则韶[2] Wang Gang;Dong Boyi;Jiang Tieliu;Chen Zeshao(School of Energy and Power Engineering,Northeast Electric Power University,Jilin 132012,China;School of Engineering Science,University of Science and Technology of China,Hefei 230027,China)

机构地区：[1]东北电力大学能源与动力工程学院,吉林132012 [2]中国科学技术大学工程科学学院,合肥230027

出　　处：《太阳能学报》2022年第7期197-202,共6页Acta Energiae Solaris Sinica

基　　金：吉林省优秀青年人才基金(20190103062JH)。

摘　　要：设计一种使用S-CO_(2)布雷顿循环的太阳能电力淡水系统,对系统的工作原理和结构组成进行介绍,并对系统开展运行性能和(火用)分析。结果表明,设计工况下系统的输出电功率为233.8 MW,布雷顿循环效率为37.5%,淡水日产量为3981.6 t。增大太阳辐照度有利于提高系统的电力输出和总的能量效率。定工况下的(火用)分析结果表明,太阳塔集热器中的(火用)损最大,为303.99 MW,对应的(火用)效率为64.45%。海水淡化换热器的(火用)效率最低,且其(火用)损值也较大。随着太阳辐照度的增加,太阳塔集热器、海水淡化系统换热器和回热器内(火用)的损均有不同幅度的增加。因此,对于该S-CO_(2)布雷顿循环太阳能电力淡水系统的后续优化而言,应重点考虑改进这些部件的性能。S-CO_(2) Brayton cycle-based solar system for electricity and fresh water productions is designed.The working principle as well as the configuration of the system is introduced.The operation performance and exergy analyses of the system are carried out.The results show that the output power and Brayton cycle efficiency of the system are 233.8 MW and 37.5%.The daily fresh water output is 3981.6 t.Increasing the solar intensity can improve the output power as well as the overall energy efficiency of the system.The exergy analysis results under the design condition reveal that the exergy loss in the solar tower is the maximum,which is 303.99 MW.Its corresponding exergy efficiency is 64.45%.The exergy efficiency in the heat exchanger of desalination device is the lowest,and the corresponding exergy loss is relatively large.With the solar intensity increased,the solar tower,heat exchanger of desalination device and two recuperators all have varying degrees of exergy loss increase.Hence,for the further optimization of the system,the performances of these components should be given priority.

关 键 词：太阳能海水淡化 布雷顿循环 太阳能发电 (火用) 超临界二氧化碳 

分 类 号：TK512[动力工程及工程热物理—热能工程]