Gas Stack Exit Velocity
Gas Stack Exit Velocity
(OP)
I'd like people's opinions on what the minimum design velocity of flue gas should be from the gas stack.
In the past I have used numbers between 50 and 60ft/s. I did a search online and saw a minimum of 16ft/s. I checked B&W Steam and it said that the 'typical' was 30-35ft/s.
Also, are there any serious issues with the low gas velocity? My only concern now is the low velocity we may get will require us to do a new dispersion model, plus we're being charged for a stack that is larger than it needs to be. In this particular case the vendor is recommending between 10-15 ft/s.
In the past I have used numbers between 50 and 60ft/s. I did a search online and saw a minimum of 16ft/s. I checked B&W Steam and it said that the 'typical' was 30-35ft/s.
Also, are there any serious issues with the low gas velocity? My only concern now is the low velocity we may get will require us to do a new dispersion model, plus we're being charged for a stack that is larger than it needs to be. In this particular case the vendor is recommending between 10-15 ft/s.





RE: Gas Stack Exit Velocity
RE: Gas Stack Exit Velocity
RE: Gas Stack Exit Velocity
Also most environmental permits (at least in US) include the stack height and exit velocity so you may need a permit modification for a new velocity.