太阳能驱动第二类吸收式热泵海水淡化系统能量分析  

Energy and exergy analyses of seawater desalination system based on absorption heat transformer driven by solar energy

作　　者：鲁敦放 胡芃[1] LU Dunfang;HU Peng(Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 230027, China)

机构地区：[1]中国科学技术大学热科学和能源工程系,安徽合肥230027

出　　处：《中国科学技术大学学报》2020年第5期570-575,共6页JUSTC

基　　金：中央高校基本科研业务费专项资金(WK2090130016)资助.

摘　　要：第二类吸收式热泵可提升低温热能的温度,基于此提出一种基于太阳能驱动第二类吸收式热泵的海水淡化系统.该系统通过第二类吸收式热泵提升太阳能集热器热源温度对海水进行加热蒸发,再对蒸气冷凝得到淡水,同时预热海水.通过对系统中各组件进行能量分析、[火用]分析,获得了系统性能随时间变化规律,并比较了有无冷凝器预热对系统性能的影响.结果表明,通过冷凝器预热海水,系统平均热效率提高了12.9%,平均[火用]效率提高了16.2%,平均淡水产量相对提高了29.2%.The absorption heat transformer(AHT)can raise the temperature of low-temperature thermal energy.In this study,a seawater desalination system was developed based on the AHT driven by solar energy,where AHT was used to raise the temperature of the solar collector heat source to heat and evaporate the seawater and then condense the steam to obtain fresh water while preheating the seawater.Through energy and exergy analyses of each component in the system,changes in system performance with time were obtained.Comparisons were conducted between the effects of condenser preheating or its absence on system performance.The results show that the seawater preheated by the condenser can increase the average thermal efficiency of the system by 12.9%,the average efficiency by 16.2%,and the average freshwater production by 29.2%.

关 键 词：太阳能 海水淡化 模拟 第二类吸收式热泵 能量分析 

分 类 号：TK011[动力工程及工程热物理]