基于LNG冷能的冷冻淡化与蓄冷系统  

Freezing Desalination with Thermal Energy Storage System Based on LNG Cold Energy

作　　者：兰文超 刘曦 叶楷 陈龙祥 LAN Wenchao;LIU Xi;YE Kai;CHEN Longxiang(Quanzhou Institute of Equipment Manufacturing,Haixi Institutes,Chinese Academy of Sciences,Jinjiang 362200,China;College of Chemical Engineering,Fuzhou University,Fuzhou 350116,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院海西研究院泉州装备制造研究中心,泉州362200 [2]福州大学石油化工学院,福州350116 [3]中国科学院大学,北京100049

出　　处：《工程热物理学报》2024年第11期3239-3242,共4页Journal of Engineering Thermophysics

基　　金：福建省科技计划项目(No.2021H0045,No.2023H0035);中国科学院青年创新促进会(No.2023315)。

摘　　要：本文提出了一套LNG冷能回收冷冻淡化蓄冷耦合系统,LNG冷能驱动有机朗肯循环做功的同时,实现海水的冷冻离心淡化后,将离心的脱盐冰作为蓄冷介质储存,并对系统展开热力学和经济性分析。结果表明,系统的淡水日产量为119.66 t,对外输出净功为52.10 kW,投资回收期为3.23年。新型耦合系统的淡化成本为0.48 USD·t^(−1),远低于传统的反渗透膜淡化成本。This work proposes a LNG cold energy recovery-freezing desalination-thermal storage coupling system,where the LNG cold energy drives an organic Rankine cycle to generate power.Simultaneously,seawater is subjected to cryogenic centrifugal desalination,and the desalinated ice produced is stored as a thermal storage medium.The thermodynamic and economic analyses of the system are conducted.The results show that the daily freshwater production of the system is 119.66 t,with a net output power of 52.10 kW.The investment payback period is 3.23 years,and the desalination cost is 0.48 USD·t^(−1),significantly lower than the cost of traditional reverse osmosis desalination.

关 键 词：海水淡化 LNG冷能回收 蓄冷 经济性分析 

分 类 号：TK115[动力工程及工程热物理—热能工程]