hello all, i am trying to convert a gas flowrate of propane to equivalent liquid volume and mass.
My consumption of propane is at 0.5 mmscfd. I have tried to do following calculation by converting gas propane to mass and then using that mass and liquid density to convert to liquid volume,. Can any experts take a review and see if this calculation looks good. or if there is any mistake
Propane Consumption = 0.5 MMSCFD= 0.5 x 10^6 / 24 = 20833 scfh
This is at 100 psig and 65°F
I convert this standard flow to actual flow using ideal gas law
Tact = 65 F = 460 + 65 = 525°R
Pact = 100 psig = 100 + 14.7 = 114.7 psia
Tstd = 60 F = 460 + 60 = 520°R
Pstd = 14.7 psia
R = 10.73 ft3 psi / lbmol °R
Pact Vact / Tact = Pstd Vstd / Tstd
Vact = Pstd Vstd / Tstd x Tact/Pact
Vact = 14.7 x 20833 / 520 x 525/114.7
Vact = 2965 ACFH
Number of moles of Propane can be found by PV = nRT
n = PV / RT
n = 114.7 x 2695 / 10.73 x 525 = 54.86 lbmol/h
Propane Mol Wt = 44.1 lb/lbmol
Propane Mass Consumption = 54.86 x 44.1 lb/h = 2419 lb/h (gas mass = liquid mass; mass conservation)
Propane Liquid Density at ambient conditions (80F ) = 30.58 lb/ft3
Propane Liquid Volume Consumption = 2419/30.58 = 79 ft3/h
My consumption of propane is at 0.5 mmscfd. I have tried to do following calculation by converting gas propane to mass and then using that mass and liquid density to convert to liquid volume,. Can any experts take a review and see if this calculation looks good. or if there is any mistake
Propane Consumption = 0.5 MMSCFD= 0.5 x 10^6 / 24 = 20833 scfh
This is at 100 psig and 65°F
I convert this standard flow to actual flow using ideal gas law
Tact = 65 F = 460 + 65 = 525°R
Pact = 100 psig = 100 + 14.7 = 114.7 psia
Tstd = 60 F = 460 + 60 = 520°R
Pstd = 14.7 psia
R = 10.73 ft3 psi / lbmol °R
Pact Vact / Tact = Pstd Vstd / Tstd
Vact = Pstd Vstd / Tstd x Tact/Pact
Vact = 14.7 x 20833 / 520 x 525/114.7
Vact = 2965 ACFH
Number of moles of Propane can be found by PV = nRT
n = PV / RT
n = 114.7 x 2695 / 10.73 x 525 = 54.86 lbmol/h
Propane Mol Wt = 44.1 lb/lbmol
Propane Mass Consumption = 54.86 x 44.1 lb/h = 2419 lb/h (gas mass = liquid mass; mass conservation)
Propane Liquid Density at ambient conditions (80F ) = 30.58 lb/ft3
Propane Liquid Volume Consumption = 2419/30.58 = 79 ft3/h