Calculate time to pressurise tank?
Calculate time to pressurise tank?
(OP)
Hi I would like to know what equation I should use to determine time to pressurise tank from nitrogen supply.
Tank volume 2000 litres
Nitrogen supplied at 15 psig with a flow rate of 40 standard litres per min
How do I calculate the length of time taken to increase tank pressure to 15 psig?
Tank volume 2000 litres
Nitrogen supplied at 15 psig with a flow rate of 40 standard litres per min
How do I calculate the length of time taken to increase tank pressure to 15 psig?





RE: Calculate time to pressurise tank?
That assumes that you start with an absolute vacuum in the tank, that the flow rate is absolutely unchangeable regardless of backpressure from the tank, that the nitrogen doesn't change temperature as it passes through various valves, fittings, etc., and that a "standard liter" is measured at the same conditions that it's being stored at, as opposed to atmospheric pressure or something.
In real life, it would get more complicated.
RE: Calculate time to pressurise tank?
RE: Calculate time to pressurise tank?
RE: Calculate time to pressurise tank?
RE: Calculate time to pressurise tank?
I made an error in my original post Im trying to calculate how long it will take to pressurise the tank to a pressure of 10 psig.
Tank will initially contain nitrogen at atmospheric pressure.
Nitrogen will be delivered to the tank at a pressure of 15 psig and flow rate of 40 standard litres per min.
RE: Calculate time to pressurise tank?
You have a flow rate of 40 standard litres per min so you can calculate a molar flow rate. The time required drops out of that.
RE: Calculate time to pressurise tank?
RE: Calculate time to pressurise tank?
RE: Calculate time to pressurise tank?
I agree with TD2K.
If you can ignore temperature effects, then it'll take approx 33 minutes (=10/15*50mins).
RE: Calculate time to pressurise tank?
Thanks for the help, 33 mins will be acceptable time.
Cheers again
RE: Calculate time to pressurise tank?
I guess the analogy would be the electrical system on a car. If you have a battery rated for 600 cold-cranking amps, how long does it take to charge your cell phone?