superheater

[ww2]

Whit regards to superheater coil design I have two questions
1- What is the linear velocity of the steam through the tubes of a superheater coil and its relation to the linear velocity of the same steam through the in and outlet collectors.
2- What are the ratio limits wherein both velocities should operate in order to assure a good steam distribution between the superheater coil tubes. The Perry advices a ratio of 10

 

[davefitz]

For the discussion on sizing headers for equal flow distribution see thread378-53583, or see articles by RA Bajura, such as Trans ASME V93 series A no. 1 pp7-12 Jan 1971

 

[ww2]

Thank you davefitz, your advise and data will keep me occupied for a while ;-) I suppose now one has a handy spreadsheet on the subject?