| 摘要 |
PURPOSE:To eliminate non-effective cooling tubes which are liable to exist near the inner peripheral surface of cooling tube groups by a method wherein the cooling tube groups are divided into multiple stages and are arranged in divided groups around an air extracting tube so as to obtain predetermined spaces between each cooling tube groups. CONSTITUTION:Steam, discharged out of a turbine, flows into a cylinder 1 through a steam inlet duct 2 and arrives at the outer periphery of first cooling tube group 9a. Then, it flows the area of the first cooling tube group 9a toward the second cooling tube group 9b. Further, it flows into the second cooling tube group 9b through the space between the first cooling tube group 9a and the second cooling tube group 9b toward the air extracting tube 12. The amount of non-condensed steam, flowed out of the first cooling tube group 9a, becomes bigger, since the second cooling tube group 9b is equipped, therefore, some amount of steam flows out of other inner peripheral surface even though a big amount of steam flows out of a part of the inner peripheral surface of the first cooling tube group 9a. As a result, the non-effective cooling tubes will not exist in the first cooling tube group 9a. |
