Heat exchanger

Abstract

Provided is a heat exchanger in which heat exchange between a low-temperature cooling medium and brine and heat exchange between brine and hydrogen gas can be efficiently performed and downsizing of cooling facilities or reduction in facility cost can be attained. The heat exchanger comprises: a vacuum insulated container 12 which is filled with brine, a lid 13 closing an upper portion opening of the container, a rotation axis 14 arranged in the axis direction of the container, a propeller 15 provided on the rotation axis, a helical hydrogen gas cooling tube 16, 17 provided in a vertically two-stage structure around the rotation axis and the propeller, and a cooling medium tube 18 for cooling brine which is arranged around the hydrogen gas cooling tubes.

1 . A heat exchanger which cools hydrogen gas with brine cooled by a low-temperature cooling medium characterized by comprising:
 a vacuum insulated container with which brine is filled;   a lid which closes the upper portion opening of the container;   a rotation axis arranged in the axis direction of the container;   a propeller provided along the rotation axis;   a helical hydrogen gas cooling tube arranged around the rotation axis and the propeller; and   a cooling medium tube for cooling brine arranged around the hydrogen gas cooling tube.   
     
     
         2 . The heat exchanger according to  claim 1 , wherein the hydrogen gas cooling tube is provided with a plurality of hydrogen gas cooling tubes having a vertically multistage structure. 
     
     
         3 . The heat exchanger according to  claim 1 , wherein the upper end and the lower end of the cooling medium tube are communicatively connected to an annular upper portion manifold and an annular lower portion manifold, respectively, and a cooling medium is circulated in the cooling medium tube from the lower end to the upper end direction. 
     
     
         4 . The heat exchanger according to  claim 1 , wherein a gas-phase portion between the inner surface of the lid and the liquid surface of brine in the container is supplied with a dry gas. 
     
     
         5 . The heat exchanger according to  claim 1 , wherein a bottom portion of the container is provided with a drain for discharging brine with which the container is filled. 
     
     
         6 . The heat exchanger according to  claim 1 , wherein the container has a vertically long bottomed cylindrical shape and a lower portion of the container is supported with three or more support legs, and the container can be stood by itself with its axis vertical. 
     
     
         7 . The heat exchanger according to  claim 1 , wherein that the low-temperature cooling medium is a low-temperature cooling medium for refrigerators using a refrigeration cycle. 
     
     
         8 . A heat exchanger which cools hydrogen gas by brine which is cooled by a low-temperature cooling medium characterized by comprising a vacuum insulated double walled vertically long bottomed cylindrical container which is filled with brine, a disk-shaped lid closing an upper portion opening of the container, a rotation axis which penetrates the center of the lid to be arranged in the axis direction of the container, a propeller provided on the rotation axis, a helical hydrogen gas cooling tube provided around the rotation axis and the propeller, and a plurality of cooling medium tubes for cooling brine which are arranged around the hydrogen gas cooling tube, whose upper ends and lower ends are communicatively connected to an annular upper portion manifold and an annular lower portion manifold, respectively, and through which a cooling medium supplied from a cooling medium inlet pipe communicating the lower portion manifold is discharged from a cooling medium outlet pipe communicating the upper portion manifold, wherein the rotation axis, the hydrogen gas cooling tube, the plurality of cooling medium tubes for cooling brine and the container are concentrically arranged centering on the rotation axis in a planar view in the order from inside mentioned below: the propeller, the hydrogen gas cooling tube, the plurality of cooling medium tubes for cooling brine and the container. 
     
     
         9 . A heat exchanger according to  claim 8 , wherein the low-temperature cooling medium is a low-temperature cooling medium tier refrigerators using a refrigeration cycle.