This program calculates various parameters useful in sizing compressors. A normal compressor design uses enough stages to keep the compression ratio (R) below XX. Also, as the gas is compressed, the temperature will increase. The greater the amount of compression, the greater the temperature increase.
R= (Pd/Ps)^(1/n)
BHP = .0857*zavg^(1/k)*zs^((k-1)/k)*Ts*k/(E*(k-1))*(R^((k-1)/k)-1)
Td = Ts*R^((k-1)/k
Where:
R = Compression Ratio
Pd = Discharge Pressure, psia
Ps = Suction Pressure, psia
n = number of stages
BHP = Brake Horsepower per stage per MMCF
zavg = (zs+zd)/2
zd = discharge compressibility factor
zs = suction compressibility factor
k = ratio of specific heat, Cp/Cv
Ts = Suction temperature, R
Td = Discharge temperature, R
E = Efficiency, 70% for high speed recips
Program Input Notes:
Suction Pressure range is 1 - 1000 psi
Discharge Pressure range is 100-5000 psi
Ps<Pd