Falling film evaporation type heat exchanger
AssigneeHitachi, Ltd.
InventorsTadakatsu Nakajima, Wataru Nakayama, Takahiro Daikoku
Life of this patent
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Abstract
A falling film evaporation type heat exchanger of the shell-tube type which includes an outer shell or main body portion and a plurality of individual heat transfer tubes disposed therein, with the heat transfer tubes extending substantially in a vertical direction. A liquid refrigerant is caused to freely fall from upper portions of the heat transfer tubes along the outer peripheral surfaces of the tubes and the evaporation of the thin refrigerant film, formed on the outer peripheral surface of the heat transfer tubes effects the transfer.
Claims18
A heat exchanger comprising an outer shell, a plurality of heat transfer tube means disposed substantially vertically in said outer shell, means for supplying a fluid to said heat tranfer tube means, means for supplying a liquid refrigerant, liquid refrigerant distributor means disposed at least at an upper and intermediate portion of the respective heat transfer tube means communicating with said liquid refrigerant supplying means for causing a liquid refrigerant to freely fall as a film of refrigerant along an outer peripheral surface of each of said heat transfer tube means, and vapor discharge means and liquid refrigerant discharge means disposed in a side wall of said outer shell so as to enable an evaporation of said film of refrigerant and discharge of liquid refrigerant whereby a heat exchange is effected between said fluid flowing through said heat transfer tube means and the film of refrigerant.
Dependencies are inferred from the claim text.