Vapor-compression desalination (VC) refers to a distillation process where the evaporation of sea or saline water is obtained by the application of heat delivered by compressed vapor.
The first method utilizes an ejector system motivated by steam at manometric pressure from an external source in order to recycle vapor from the desalination process.
Using the second method, water vapor is compressed by means of a mechanical device, electrically driven in most cases.
The resulting fresh water is moved to storage while the heat removed during condensation is transmitted to the remaining feedstock.
[1] As the system is electrically driven, it is considered a "clean" process, it is highly reliable and simple to operate and maintain.