| 摘要 |
PURPOSE:To improve the heat transmitting rate to the outside of pipes as well as to make easy of the manufacturing of pipes by a method wherein a heat transmitting pipe is made straight and a guide pipe is provided around a center pipe which is constructed as a double pipe. CONSTITUTION:The guide pipe 15 is provided around the outside pipe 8 of the center pipe and primary fluid is flowed into a gap 16 which is formed between said guide pipe 15 and the outside pipe 8 of the center pipe from the lower end of the openning of the guide pipe 15, and the fluid is made to rise in the gap 16. A guide pipe 18 is also provided around a heat transmitting pipe 4 and primary fluid is made to flow through a gap 13 which is formed between these two pipes. Hereby, the speed of primary fluid increases and the heat transmitting rate to the outside of the heat transmitting pipe 4 can be improved. The heat transmitting pipe 4 and the guide pipe 18 which surrounds the heat transmitting pipe 4 are manufactured easily because these pipes are made straight. |
