Natural Gas Mains

[jules43]

Can anyone help me out please? I have to size a gas main for a burner capacity of 2,750,000 BTU/Hr. Does anyone out there have any links to where I can get my hands on how to go about it.

It's a one off calculation, so I don't want to spend money on purchasing software etc and cannot find anything on the internet which helps.

 

[gmatov]

Can you do a calculation for 2,750 CFM at your burner pressure?

Normally 1,000 BTU per cubic foot of natural gas. Hi-lo BTU gases are "blended" to this standard. Ditto if you are using waste gas, as we use coke oven gas blended with natural gas. Flow rate has to increase as the coke gas is lower BTU, to my understanding, but more economical to use it than to flare it off.

Cheers,

George

 

[dvd]

http://www.psdmagazine.com/pdf/May_Jun_03/34-38.pdf

The article is pretty good. Depending on the gas pressure and whether you are regulated down to low enough pressure the Spitzglass equation works adequately for simple stuff.

The Combustion Handbook (book 1)published by North American is worth the money if you are looking to buy a good reference text on burner related topics.

 

[joecontrol]

Well,

Take the btu's and/ 1000 = NatGas needed in scfh

I usally expect the supply to be between 2 to 5 psi but be sure what the combustion system designer asked for in the burner info.

I would also add 10 to 15% to the amount caculated for a volume safty factor somtimes you may need to run the burner harder to get the process completed.


Good luck,Joe