A plate heat exchanger, a heat exchanging plate and a method of treating a feed such as sea water

A method of manufacturing a heat exchanger for treating a feed such as sea water, the method comprising:

• providing a plurality of heat exchanging plates, each heat exchanging plate defines a first thermal interface, a second thermal interface and at least one further thermal interface, and
• forming a plate package by arranging the plurality of heat exchanging plates in a successive order, wherein the plate package define a heating volume for receiving a heating medium, a cooling volume for receiving a cooling medium and a plurality of process volumes, each of the volumes being fluidly separated from each other in the plate package, each of the process volumes includes:
• an evaporation section being arranged to permit evaporation of at least a part of the feed,
• a separation section being arranged to separate a non-evaporated part of the feed from an evaporated part of the feed, and
• a condensation section being arranged to condense the evaporated part of the feed,
• wherein the first thermal interface is defined between the heating volume and the evaporation section of a first process volume of the plurality of process volumes, the second thermal interface is defined between the cooling volume and the condensation section of a second process volume of the plurality of process volumes, and the at least one further thermal interface is defined between an evaporation section and a condensation section of two adjacent process volumes.

A plate for a plate heat exchanger for treatment of a feed such as sea water, the plate heat exchanger including a plate package comprising a plurality of heat exchanging plates arranged in a successive order, the plate package defines a heating volume for receiving a heating medium, a cooling volume for receiving a cooling medium and a plurality of process volumes, each of the volumes being fluidly separated from each other in the plate package, each of the process volumes includes:

• an evaporation section being arranged to permit evaporation of at least a part of the feed,
• a separation section being arranged to separate a non-evaporated part of the feed from an evaporated part of the feed, and
• a condensation section being arranged to condense the evaporated part of the feed,
• wherein each heat exchanging plate defines a first thermal interface between the heating volume and the evaporation section of a first process volume of the plurality of process volumes, a second thermal interface between the cooling volume and the condensation section of a second process volume of the plurality of process volumes, and at least one further thermal interface between an evaporation section and a condensation section of two adjacent process volumes.