Comparative Analysis of MED-TVC and MED-MVR for Seawater Desalination

Aspect MED-TVC MED-MVR Vapour Compression Method Uses Thermal Vapour Compression: High-pressure steam (motive steam) entrains and compresses vapour from the last effect using an ejector (jet compressor). Uses Mechanical Vapour Recompression: A mechanical compressor (usually centrifugal or Roots blower) recompresses the vapour mechanically to a higher pressure.

Primary Energy Source Thermal energy (steam) from an external source such as boilers, waste heat, or power plants. Electrical energy driving the mechanical compressor (electricity-driven). multi effect distillation with TVC and MVR

Driving Force Steam pressure difference; ejector entrainment efficiency governs performance. Compressor work; pressure and temperature rise achieved mechanically.

Vapour Handling Non-condensable gases and excess vapour are discharged after each stage or sent to ejector. Almost all vapour is recompressed and reused; minimal losses to atmosphere.