| 摘要 |
PROBLEM TO BE SOLVED: To increase a heat transfer amount from combustion gas at low cost.SOLUTION: A radiant tube type heating device 1 includes a heat transfer promotion body 5 arranged on the inner wall surface of a radiant tube 2 opposite to a recuperator 4, and configured to suppress heat input from combustion gas to the radiant tube 2. Consequently, a heat transfer amount from combustion gas can be increased at low cost. On the surface of the heat transfer body 5, a high-reflection coating is preferably coated. Also, the heat transfer promotion body 5 is preferably formed by a material having a heat conductivity lower than that of a material forming the radiant tube 2.SELECTED DRAWING: Figure 1 |
