The passive system that generate vacuum is a reliable systems and could allow heat pumps that uses traditional
refrigerant to be used in seawater distillation process. This could be done by reducing the saturation temperature
of seawater to be matched with the operating temperature ranges of these refrigerants. A proposed system uses
heat pump for seawater evaporation and condensation. The suggested system is suitable for remote areas and
could be designed and installed in the various sizes. Also the compressor could be run with solar PV panels.
The followings are a detailed description of systemwith thermal analysis and energy consumption. It also represents
an energy comparison of the proposed systemwith the other desalination methods. The comparison shows
that the system gives promising competitive energy consumption