Patent ID: 6367429
Filing Date: 2002-04-09
Classification: F17C,F28D

Abstract:
An intermediate fluid type vaporizer comprising:a shell containing an intermediate fluid therein; a heat source tube formed by first and second pluralities of straight tubes, which are provided in said shell, and allowing a heat source fluid to flow through said heat source tube for evaporating the intermediate fluid in a liquid phase with heat exchange between the heat source fluid and the liquid intermediate fluid; a return chamber connecting said first and second pluralities of straight tubes to each other; and a heat transfer tube provided in said shell and allowing liquefied gas to be introduced to and flow through said heat transfer tube for heat exchange between the evaporated intermediate fluid and the liquefied gas, wherein said first plurality of straight tubes is operatively connected to receive the heat source fluid at an inlet side of said shell, said second plurality of straight tubes is operatively connected to output the heat source fluid through an outlet side of said shell, and said first and second pluralities of straight tubes and horizontally spaced from each other so as to generate a temperature differential between the first and second pluralities of straight tubes, whereby convection within said shell is accelerated.