Investigation on low temperature flash vaporization for desalination

Abstract

A new concept for sea water desalination where warm ocean water from the upper strata of the ocean in the ambient temperature is injected into a flash evaporator at a low pressure and the resulting water vapour is condensed in a condenser using the cold ocean water taken from the depth of the ocean The low pressure in the vaporizer and condenser is maintained by means of vacuum pumping system and barometric seals The barometric seal provided by the long duct connecting the vaporizer to the ocean enables to maintain the vacuum in vaporizer and also to discharge large volume of water which is not vaporized in the vaporizer without any pump Similarly the barometric seal provided by another duct connecting the condensate side of the condenser to the fresh water collection reservoir enables to maintain the vacuum in condenser and also to discharge all condensed fresh water from the condenser without any pump newline newline