Mechanical vapor compression (MVC)‎ desalination system optimal design

Abstract EN

This work describes a mathematical model of the mechanical vapor compression system; the thermal performance of the system was investigated.

The mathematical model is developed to reach a more accurate design of the system.

Non-linear equations of the physical properties are used through the model process (heat transfer coefficients, boiling point elevation BPE, ...etc).

In this work, mass, heat, and energy balance equations are used through all stages of the model.

The main goals of this model are to reach the optimal operating conditions in order to optimize the heat transfer area, the power consumption, and minimize the process cost.

This is done through minimizing both the heat transfer area, power consumption by the compressor.

It is clear that both the required flow streams (feed, brine, and distillate) and the consumed electricity increased with the increase of the fresh demand.

Also, it is obvious that most of the cost for the MVC units is consumed in the operation and maintenance of the compressor as it is the main power consumption and the highest rotating part in the unit.

The exergy destruction for the MVC is analyzed through this work to calculate and optimize both the production cost and the driving force for the flow process.-