耦合太阳能集热的喷雾闪蒸海水淡化系统的热经济分析  

Thermal Economic Analysis of a Spray-flash Desalination System Coupled with Solar Heat Collection

作　　者：蔡本安 郭民承 龙城君 杜乔琛 张文超[1] 蔡伟华 CAI Ben-an;GUO Min-cheng;LONG Cheng-jun;DU Qiao-chen;ZHANG Wen-chao;CAI Wei-hua(School of Energy and Power Engineering,Northeast Electric Power University,Jilin 132012,China)

机构地区：[1]东北电力大学能源与动力工程学院,吉林吉林132012

出　　处：《节能技术》2023年第3期214-223,共10页Energy Conservation Technology

基　　金：国家自然科学基金青年项目(52206194)。

摘　　要：为进一步提高喷雾闪蒸海水淡化系统的能源效率,对耦合太阳能集热的多级喷雾闪蒸系统进行了热量和㶲经济分析,研究了太阳能热量变化对系统性能的影响。通过分析不同参数对能量变化的影响,得到相应㶲经济成本值的变化规律。研究结果表明,较高的顶值海水温度和流量增大了系统的生产率,从而提高了热回收效率,为热回收过程提供了更多的能量。生产率的变化有效地反映了太阳能辐射随季节的变化,在一年中阳光最少的一天,最小生产率约为峰值生产率的34%~38%。当运行级数为10,TBT=338 K,d=500μm,T_(cw,in)=298 K时,系统所产生的㶲损最小,其单位㶲成本值为167.63$/kJ。单位㶲损成本率越低,所产生的㶲损越大,可以通过降低冷却水的输入温度来提高系统的运行效率以减少能量的损失。In order to further improve the energy efficiency of spray flash desalination system,the heat and exergy economic analysis of multi-stage spray flash system coupled with solar heat collection is carried out,and the influence of solar heat variation on system performance is investigated.By analyzing the influence of different parameters on energy change,the variation rule of exergy economic cost value is obtained.The results show that higher top-value seawater temperature and flow rate increase the productivity of the system,thus improving the heat recovery efficiency and providing more energy for the heat recovery process.The productivity variation effectively reflects the seasonal variation of solar radiation,with the minimum productivity being about 34%~38%of the peak productivity on the least sunny day of the year.When the number of operating stages is 10,TBT=338 K,d=500μm,and T_(cw,in)=298 K,the system produces the smallest exergy loss with a unit exergy cost value of$167.63/kJ.The lower unit exergy loss cost rate is,the greater exergy loss will be,which can improve the operation efficiency of the system to reduce energy loss by reducing the input temperature of cooling water.

关 键 词：多级喷雾闪蒸 太阳能 海水淡化 热经济分析 㶲成本 

分 类 号：TK519[动力工程及工程热物理—热能工程]