


HOW IS IT USED? 
Explanation 
User Interface 
Excel in Windows 
Customizable by User? 
Yes 
Suggested User Level 
Engineer / Supervisor 
English and SI Units 
Yes 


STANDARDS COVERED 

AGA Report No. 8 
Yes 
AGA Report No. 10 
Yes 


CALCULATION 
Common Applications 
Speed of Sound 
Ultrasonic meter verification calculations 
Critical Flow Factor 
Critical flow prover calculations 
Isentropic Exponent
Kappa 
Calculations of isentropic compression and expansion of
gas 
Specific Enthalpy 
Heat exchanger calculations 
Specific Entropy 
Compressor calculations 
Molar Density D at Tf,Pf 
Conversion of volume flow rate at Tf,Pf to molar flow
rate 
Mass Density Rho at Tf,Pf 
Conversion of mass flow rate to volume flow rate at Tf,Pf 
Relative Density (ideal
gas) Gr (ideal gas) 
Molecular weight of gas divided by molecular weight of
air 
Relative Density (real
gas) Gr (real gas) 
Density of gas divided by density of air at Tb,Pb 
Zb Compressibility Factor
at Tb,Pb 
Flow rate conversions from flowing to base conditions 
Zf Compressibility Factor
at Tf,Pf 
Flow rate conversions from flowing to base conditions 
Square Root of (Zb/Zf)
Supercompressibility 
Orifice meter flow rate equation factor 
Molecular Weight Molar
Mass 
Moles to mass units conversion factor (mass/mole) 
Cp (ideal) Ideal Gas
Const. P, Heat Capacity 
Calculation of ideal gas enthalpy changes 
Cp Const. Pres. Heat
Capacity 
Calculation of enthalpy changes at constant pressure 
Cv Const. Vol. Heat
Capacity 
Calculation of enthalpy changes at constant volume 
Cp/Cv Heat Capacity Ratio 
Used for adiabatic process calculations (no heat
transferred) 
Specific Enthalpy (ideal
gas) 
Calculation of ideal gas enthalpy changes 
Molar Density at TbPb 
Conversion of volume flow rate at Tb,Pb to molar flow
rate 
Mass Density at TbPb 
Conversion of mass flow rate to volume flow rate at Tb,Pb 
JouleThomson Coefficient 
Temperature drop for regulator and valve calculations. 

