I am having trouble trying to figure out in a ballpark way, how to determine what flow rate of air is needed to pressurize a vessel to a known pressure, in a set time. I.e, a 8,500 ft3 vessel to 5 psig in 30 min. The inlet line size will be determined at a later date. I vaguely remember from school a couple simple equations that can be used, but all I can think of at the moment is Q=(rho)*A*V, and that doesn't help, since it doesn't deal with pressure. I appreciate your help.
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