AGA 10

v1.0

Speed of Sound in Natural Gas and Other Related Hydrocarbon Gases

This standard calculates several thermodynamic and physical properties including the speed of sound in the gas at flowing conditions.

Configuration

Option	Setting
Calculate Critical Flow Factor	No Yes
Neo-Pentane Options	Add to iPentane Add to nPentane Neglect
Enforce Composition Limits	No Yes

Inputs

Field Name	Units	Value
Methane (Normalised)	mol%
Ethane (Normalised)	mol%
Propane (Normalised)	mol%
iButane (Normalised)	mol%
nButane (Normalised)	mol%
iPentane (Normalised)	mol%
nPentane (Normalised)	mol%
neoPentane (Normalised)	mol%
Hexane (Normalised)	mol%
Heptane (Normalised)	mol%
Octane (Normalised)	mol%
Nonane (Normalised)	mol%
Decane (Normalised)	mol%
Hydrogen (Normalised)	mol%
Nitrogen (Normalised)	mol%
Carbon Dioxide (Normalised)	mol%
Hydrogen Sulphide (Normalised)	mol%
Water (Normalised)	mol%
Helium (Normalised)	mol%
Oxygen (Normalised)	mol%
Carbon Monoxide (Normalised)	mol%
Argon (Normalised)	mol%
Upstream Temperature (t1)	°C °F K °R
Upstream Pressure (p1)	mbar mbar g bar bar g Pa Pa g kPa kPa g MPa MPa g GPa GPa g psi psi g inH2O @ 60°F
Standard Temperature	°C °F K °R
Standard Pressure	mbar mbar g bar bar g Pa Pa g kPa kPa g MPa MPa g GPa GPa g psi psi g inH2O @ 60°F

Results

Description	Units	Actual
Upstream Density	kg/m³ g/m³ mg/m³ lb/ft³
Upstream Compression Factor	-
Stream Molar Density	mol/m³ kmol/m³ Mmol/m³
Standard Density	kg/Sm³ g/Sm³ mg/Sm³ lb/Sft³
Standard Compression Factor	-
Standard Molar Density	mol/m³ kmol/m³ Mmol/m³
Supercompressibility	-
Molecular Weight	kg/kmol
Relative Density Ideal	-
Relative Density Real	-
Ideal Gas Specific Enthalpy	J/kg KJ/kg
Real Gas Specific Enthalpy	J/kg KJ/kg
Real Gas Specific Entropy	J/(kg.K) KJ/(kg.K)
Ideal Constant Pressure Heat Capacity	J/(kg.K) KJ/(kg.K)
Real Constant Pressure Heat Capacity	J/(kg.K) KJ/(kg.K)
Real Constant Volume Heat Capacity	J/(kg.K) KJ/(kg.K)
Heat Ratio	-
Speed of Sound	m/s
Isentropic Exponent	-