Heat-exchanger made of concentric tubes - has gas flowing in spiral in annular chamber round inner tube

摘要

The heat exchanger comprises three or more concentric tubes one inside the other, so as to form annular chambers between them. The gaseous heat transfer medium flows through the inner of these chambers, and the liq. to be heated through the outer one. The gaseous medium in the inner chamber (8) flows round the inner tube (3) in a spiral path (19). There can be four concentric tubes formingm three annular chambers, the gas flowing through the middle one. USE/ADVANTAGE - Heat-exchanger gives max. efficiency and is . simple to produce.