Flow Rate of CH4

This sounds like a homework problem that's out of my field. So these questions and comments may be only a red herring but here goes.

• Do you intend on using the 2 meter long 1/4" ID diameter hose as the flow limiting orifice?
• Will this flow enter the air-stream before or after the throttle?
• If your diesel has a turbo will this be before or after the turbo
• For your safety and to conserve methane find a way to turn off this flow if the engine is not running. Administrative control (remembering to manually turn it off) will not be sufficient to be really safe.

• Do you intend on using the 2 meter long 1/4" ID diameter hose as the flow limiting orifice?

yes

• Will this flow enter the air-stream before or after the throttle?

the methane will be injected directly into the air intake of the engine

• If your diesel has a turbo will this be before or after the turbo

there is no turbo

• For your safety and to conserve methane find a way to turn off this flow if the engine is not running. Administrative control (remembering to manually turn it off) will not be sufficient to be really safe

I am using some check valves and needle valves for this

thank you, I got the answers I wanted from the other thread linked here.

Use the Weisbach Darcy equation for generalised pipe flow, as suggested in the earlier thread on this topic. If the answer is greater than 50psi, use bigger diameter pipe.

Nice work on the other thread PWSlack. Another GA for you. Also, I seem to have guessed correctly myself, I had no answer but at least my questions were right.