Water distillation system

A water distillation system comprising:

• a water evaporator, a water condenser and a water storage tank, the evaporator, condenser and tank being connected in series so that water passes from the evaporator to the tank via the condenser;
• a water inlet to deliver feed water to the evaporator;
• a water outlet from said tank;
• degassing means interposed between said water inlet and said evaporator for removing dissolved gasses in said feed water and for maintaining a predetermined level of said feed water in said evaporator;
• means for reducing pressure in said evaporator and condenser relative to atmospheric pressure, wherein said means for reducing pressure includes an entrainment device and a circulation pump to pump water from said water storage tank around a circulation pipe, and wherein said pump receives water from said water storage tank and outputs water to a through input of said entrainment device, a through output of said entrainment device returning water to said water storage tank, said entrainment device further including a transverse port interconnected to an outlet of said condenser to entrain, under vacuum, condensate from said condenser to water passing to said water storage tank;
• and
• a single refrigerant circuit, said refrigerant circuit including:
• a refrigerant condenser in said water evaporator;
• a refrigerant evaporator in said water condenser;
• a throttle device through which refrigerant from said refrigerant condenser passes to said refrigerant evaporator;
• a refrigerant compressor to circulate said refrigerant around said circuit;
• desuperheater means, through which the refrigerant passes, to cool the refrigerant, said desuperheater means being positioned operatively after said compressor and before said refrigerant condenser;
• and
• a heat exchanger, through which the refrigerant passes, located in said water storage tank to cool water located in said tank, said heat exchanger being positioned in said circuit after said throttle means and before said compressor relative to the direction of flow of the refrigerant about said circuit.