| 摘要 |
PROBLEM TO BE SOLVED: To provide a double tube type heat exchanger capable of increasing heat transfer area and reducing flow passage cross sectional area to improve heat transferring so as to improve heat exchange efficiency. SOLUTION: In this double tube type heat exchanger, heat is recovered by heat transfer in a heat transfer inner tube inserted into a heat transfer outer tube that is heated to high temperature to have an interval distance from it. The heat transfer outer tube comprises a sintered body using dense silicon carbide. The heat transfer inner tube comprises dense silicon carbide, dense ceramic, or metal. Both ends of it are opened, and the interval distance is 5-20 mm. COPYRIGHT: (C)2005,JPO&NCIPI
|
