热泵低温多效蒸馏海水淡化系统性能仿真研究  

Performance Study of Heat Pump Operated Low Temperature Multi-Effect Distillation Desalination System

作　　者：沈九兵 陈杨 王炳东 韦文斌 陈育平 SHEN Jiubing;CHEN Yang;WANG Bingdong;WEI Wenbin;CHEN Yuping(School of energy and power,Jiangsu University of science and technology,Zhenjiang 212103,China)

机构地区：[1]江苏科技大学能源与动力学院,江苏镇江212103

出　　处：《水处理技术》2024年第12期79-82,95,共5页Technology of Water Treatment

基　　金：国家自然科学基金项目(52006092)。

摘　　要：将压缩式热泵与低温多效蒸馏海水淡化技术相耦合,由蒸馏器回收低温蒸汽潜热,再由冷凝器替代传统热源蒸汽,能有效提高海水淡化能效,降低系统运行要求,极具市场应用前景。为优化系统设计参数,本文利用Aspen plus软件对一效至三效热泵低温多效蒸馏海水淡化系统进行仿真研究,依据仿真结果,分析讨论了蒸馏器效数、效间温差和进料海水温度对系统性能的影响,结果表明三效系统的淡水产量和造水比最优,热泵压缩机容积流量和压比会随蒸馏器效数的增加而增大;增加效间温差虽然会增大系统淡水产量,但系统造水比会减小,且热泵压缩机压比会增加;而进料海水温度的升高则使得系统淡水产量与造水比同时增加。The compressed heat pump is coupled with the low-temperature multi-effect distillation seawater desalination technology,the latent heat of low-temperature steam can be recovered by the evaporator.This reclaimed heat is then employed to replace traditional heat source of steam,resulting in a significant enhancement in the energy efficiency of seawater desalination and a reduction in system operational requirements.This integration holds substantial promise for practical applications in the market.To optimize system design parameters,this study employed Aspen Plus software to conduct simulation research on three heat pump operated low-temperature multi-effect distillation seawater desalination systems,which are from single-effect to triple-effect.Based on the simulation results,an analysis was conducted to assess the impact of the number of distillation effects,temperature differentials between each effect and the feed seawater temperature on system performance.It can be concluded that:although a triple-effect system offers the most favorable freshwater production rate and water production ratio,the heat pump compressor flow rate and pressure ratio exhibits an increasing trend with the increase of distillation effects.Elevating the temperature differential between each effect contributes to heightened freshwater production,albeit at the cost of a reduced water production ratio,accompanied by an increase in the heat pump compressor pressure ratio.Moreover,a rise in the feed seawater temperature results in a simultaneous increase in both system freshwater production and the water production ratio.

关 键 词：压缩式热泵 低温多效蒸馏 海水淡化 效间温差 造水比 

分 类 号：P747.13[天文地球—海洋科学]