ORC驱动RO海水淡化不同能量回收方式性能分析  

Performance Analysis of an ORC-RO Desalination System with Different Energy Recovery Methods

作　　者：刘秀龙[1] 曹泷 徐进良[1] 谢学旺 赵晓利[2] LIU Xiulong;CAO Shuang;XU Jinliang;XIE Xuewang;ZHAO Xiaoli(l. Beijing Key Laboratory of Multiphase Flow and Heat Transfer for Low Grade Energy, North China Electric Power University, Beijing 102206, China;Hebei Electric Power Design and Research Institute, Shijiazhuang 050031, China)

机构地区：[1]华北电力大学低品位能源多相流与传热北京市重点实验室,北京102206 [2]河北省电力勘测设计研究院,石家庄050031

出　　处：《动力工程学报》2018年第4期329-336,共8页Journal of Chinese Society of Power Engineering

基　　金：国家自然科学基金国际合作与交流资助项目(51210011)

摘　　要：建立了有机朗肯循环(ORC)驱动反渗透(RO)海水淡化复合系统计算模型,以混合工质R600a/R601a为有机工质,海水淡化所用海水经过冷凝器以提高淡水产量,并对使用不同能量回收装置的ORC-RO复合系统的性能进行比较。结果表明:BASIC系统、PWT能量回收系统和PES能量回收系统R600a/R601a的最佳混合比例分别为0.7/0.3、0.8/0.2和0.9/0.1;在渤海年平均水温12℃时,BASIC系统的最大淡水产量为5.04kg/s,采用PWT能量回收系统能使淡水产量提高38.69%,采用PES能量回收系统能使产水量提高130.36%;相同功耗下,3个系统比采用电驱动RO海水淡化的系统淡水产量分别提高80.96%、39.44%和19.57%;随着冷凝器进水温度的升高,PES系统的产水优势减弱,混合工质相比于纯工质的产水优势更加明显,可见复合系统的设计需要考虑冷凝器进水温度的影响。A model of reverse osmosis（RO）desalination system driven by organic Rankine cycle（ORC）was designed.Taking R600 a/R601 aas the organic working fluid,with the seawater passing through a condenser to improve the fresh water production,a comparison was carried out on the performance of an ORC-RO desalination system with different energy recovery methods.Results show that the best mixing ratio of R600 a/R601 afor the BASIC system,PWT energy recovery system and PES energy recovery system are respectively 0.7/0.3,0.8/0.2 and 0.9/0.1.At the average temperature 12 ℃ of Bohai sea,the fresh water production of BASIC system is 5.04 kg/s,which can be increased by 38.69% and 130.36%when PWT system and PES system are used respectively.For the same power consumption,the fresh water production of above three systems is respectively 80.96%,39.44% and 19.57% higher than the RO desalination system driven by electricity.With the increase of inlet water temperature of the condenser,the advantages of PES system in water production reduce,and zeotropic mixture is proved to be superior to pure fluid.Clearly,it is necessary to consider the influence of seawater temperature in the design of similar composite systems.

关 键 词：有机朗肯循环 反渗透海水淡化 混合工质 能量回收 淡水产量 进水温度 

分 类 号：P747[天文地球—海洋科学]