Allocation of thermal vapor compressor in multi effect desalination systems with different feed configurations

摘要

Multi-Effect Desalination system with thermal vapor compression (MED-TVC) is a promising large-scale thermal water production technique. In MED, multiple evaporators are used where vapor is formed in each one using the heat generated from condensing steam/vapor in the previous effect, resulting in high Performance Ratio (PR). A thermal Vapor compressor is used with the MED system to extract a portion of the formed vapor formed in an effect and mix it with motive steam to reduce the rate of steam from a power plant and decrease the pressure in the effects. The top brine temperature of MED system is limited to a value around 65 degrees C to avoid scale formation on the outer surface of tubes in the evaporator.