开路热管海水淡化的热力学第2效率分析  

Exergy Analysis of Open Loop Heat Pipe Desalination

作　　者：章先涛 闻心怡[1] 孙海军 胡雪蛟[2] ZHANG Xiantao;WEN Xinyi;SUN Haijun;HU Xuejiao(Wuhan Second Ship Design and Research Institute,430044;School of Power and Mechanical Engineering of Wuhan University,430072： Wuhan,China)

机构地区：[1]武汉第二船舶设计研究所,430044 [2]武汉大学动力与机械学院,湖北武汉430072

出　　处：《水处理技术》2018年第11期41-44,共4页Technology of Water Treatment

基　　金：湖北省自然科学基金(2018CFB337)

摘　　要：基于平衡分析方法对利用毛细力驱动耦合低品位余热的开路热管海水淡化装置中关键节点处焓、熵、进行热力学计算和分析。结果表明,在环境温度28℃、蒸发温度40℃时,淡化过程最小分离功为2.09 J/g,系统整体效率为1.54%。损失最大过程是蒸汽冷凝成淡水,为系统总输入的67.1%,是影响开路热管海水淡化系统能效水平的关键因素。说明开路热管海水淡化过程中存在很大的不可逆程度,在提高系统热力学完善程度方面仍具备相当大的潜力。Based on the exergy equilibrium analysis method, the enthalpy, entropy and exergy of the key nodes in the open loop heat pipe （OLHP） desalination system which drove by capillary force were calculated and analyzed thermodynamically. The results showed that, the minimum separation power was 2.09 J/g at the ambient temperature was 28 ℃ and the evaporation temperature was 40 ℃, and the overall efficiency of the system was only 1.54%. The maximum loss was occurred where steam was condensed into flesh water, accounting for 67.1% of the total input of the system, which was a key factor affecting the energy efficiency of the open-loop heat pipe,desalination system. It showed that there is a large degree ofirreversibility in the process of seawater desalination, and it still has considerable potential to improve the system exergy efficiency.

关 键 词：开路热管 海水淡化 [火用]平衡法 [火用]效率 

分 类 号：P747.7[天文地球—海洋科学]