PURPOSE: To provide an open rack type vapourization device for liquefied low temperature gas, in which ice does not attach to the outside of a heat-transfer tube acting as the heat source side, mounting of heat insulating material in the heat-transfer tube is not necessary, and thermal stress of the heat-transfer tube can be much decreased.
CONSTITUTION: A heat-transfer tube 12 for constituting a heat exchange panel is formed in a triple tube structure, an annular spaces 19 between an inner tube 13 and an intermediate tube 14 and an annular space 20 between the intermediate tube 14 and an outer tube 15 are made channels, and respective return parts 16, 17 are provided on the upper part of the channel of the inner tube 13 and the intermediate tube 14 and on the lower part of the channel of the intermediate tube 14 and the outer tube 15.
KONISHI KEIZO
UENO KOICHI
TSUKAMOTO AKIO
