IMMERSION-TUBE HEAT EXCHANGER

摘要

In a tube-type heat exchanger which produces superheated steam directly while being of the once-through type, the tubes permit recycling of the vapor of the secondary fluid which is circulated within them. A coaxial sleeve mounted within the annular space between an intermediate tube and the pressure tube delimits an annular zone filled with heat-insulating stagnant vapor so as to isolate the vapor produced from the fluid in liquid phase.