| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat exchanger showing improved durability against metallic powdering and stress corrosion. SOLUTION: In the heat exchange method consecutively cooling a first fluid by carrying out indirect heat exchange with a second fluid, the first fluid is consecutively led into at least two concentric U-shaped pipe bundles respectively dividing at least one first heating area and a second heating area, the second fluid is led into a shell side part of the U-shaped pipe bundles, the heating areas are partially separated from each other by a wall, the first heating area is a comparatively cold area, the second heating area is a comparatively hot area, the pipe bundle of the comparatively cold first heating area is made by low alloy steel, the pipe bundle of the comparatively hot second heating area is made by heat resistant and corrosion resistant alloy, and each step of drawing out the cooled second fluid and the heated second fluid is included. COPYRIGHT: (C)2006,JPO&NCIPI
|
