12800 t江海直达船舶LNG冷能利用方案设计与优化  

Design and optimization of LNG cold energy utilization for the 12 800 t ship

作　　者：刘锐 沈妍 胡寅[2] 姚寿广 谷家扬[3] LIU Rui;SHEN Yan;HU Yin;YAO Shou-guang;GU Jia-yang(School of Energy and Power Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,China;School of Mechatronics and Power Engineering,Jiangsu University of Science and Technology,Zhangjiagang 215600,China;Marine Equipment and Technology,Jiangsu University of Science and Technology,Zhenjiang 212003,China)

机构地区：[1]江苏科技大学能源与动力工程学院,江苏镇江212003 [2]江苏科技大学机电与动力工程学院,江苏张家港215600 [3]江苏科技大学海洋装备研究院,江苏镇江212003

出　　处：《舰船科学技术》2020年第11期55-58,共4页Ship Science and Technology

基　　金：国家重点研发计划资助项目(2018YFC0310400)。

摘　　要：针对12 800 t LNG运输船,在满足该船发电、冷库、海水淡化以及空调冷量的需求前提下,将剩余冷量进行蓄冷利用,并合理地选择系统所需冷媒,构建设计了LNG冷能梯级综合利用系统方案。通过Aspen HYSYS对方案进行过程模拟与分析,并对系统方案进行详细的流程及工质优化。最后采用遗传算法进一步对系统关键参数进行参数匹配优化,提高系统的?效率。结果表明,诸多方案中,以"发电+冷库+海水淡化+蓄冷"的方案最优,?效率为40.04%。For a 12 800 t LNG carrier, a comprehensive LNG cold energy cascade utilization system is developed according to the ship’s power generation, the cold storage, the seawater desalination and the air conditioning cooling capacity requirements. Besides, the remaining cooling capacity is further utilized for the cold storage design by reasonably selecting the refrigerant. The processes and circulating working mediums and parameters are optimized by the Aspen HYSYS process simulation. Finally, the genetic algorithm is used to further optimize the key parameters of the system to improve the exergy efficiency of the system. The results show that among the many schemes, the scheme of power generation + cold storage +seawater desalination + cold storage is the best scheme, with the exergy efficiency of 41.01%.

关 键 词：LNG冷能 发电循环 遗传算法 [火用]分析 

分 类 号：U674.13[交通运输工程—船舶及航道工程]