Modeling of MED distillation with vapor compression

Subject Areas : Optimization

ashkan hamedi ¹ , Hadi Kargar Sharifabad ²

1 - project maneger
2 - استادیار، گروه مهندسی مکانیک، واحد سمنان، دانشگاه آزاد اسلامی ، سمنان، ایران

Received: 2015-05-25 Accepted : 2015-07-01 Published : 2013-02-19

Keywords: desalination, Multi Effect, Steam Ejector, thermal vapor compression, thermoeconomic,

Abstract :

Due to the ever-increasing human need for drinking water and limitation of available drinking water resources, we always need to use salty waters of the seas and oceans for converting into purified drinking water. In the article, a variety of water treatment processes is reviewed and applied. In all the processes, energy must be used for the preparation of purified water. Since the resources for available energy are also limited, the researchers always attempt to identify the best method for water purification in terms of cost, energy consumption and the other items. Also, with thermo-economic analysis, they cause the cost of drinking water is minimized. Among a variety of Multi Effect Desalination methods, Multi Effect Desalination with Parallel Feed along with Steam Ejector is analyzed thermo-economically. Moreover, the conditions are investigated in that we can have less cost for purified water. Finally, we will observe that in Multi Effect Desalination methods, Steam Ejector reduces the cost up to 60%. In Multi Effect Desalination refineries, even if the temperature of salt water in the first stage is 70°-80°, Steam Ejector will cause to produce most purified water.