AGA Flow Calc DLL Functions

With Gas Compositions Available (AGA 3 and AGA 8 Calculation) If you have Gas compositions Available then you would use this function which takes in the gas

compositions as the last parameter.

Material Type Enumeration This is the enum that is needed to specify the Pipe and Orifice Material. Support materials are StainlessSteel, Monel, and CarbonSteel. public enum MaterialType { StainlessSteel = 0, Monel = 1, CarbonSteel = 2, } Gas Compositions Object Gas compositions will have to be specified in the GasComps object. They are specified in the following way: GasComps MUST add up to 1 or it will throw an exception: (within +/- .5%) AGAFlowCalculation.GasComps gascomps = new AGAFlowCalculation.GasComps(); gascomps.Add(.9, AGAFlowCalculation.AgaConstants.GasCompositions.Nitrogen_N2); gascomps.Add(.1, AGAFlowCalculation.AgaConstants.GasCompositions.CarbonDioxide_CO2); Available Gas Compositions are as follows: public enum GasCompositions { Methane_C1 = 0, Nitrogen_N2 = 1, CarbonDioxide_CO2 = 2, Ethane_C2 = 3, Propane_C3 = 4, Water_H2O = 5, HydrogenSulfide_H2S = 6, Hydrogen_H2 = 7, CarbonMonoxide_CO = 8, Oxygen_O2 = 9, iButane_iC4 = 10, nButane_nC4 = 11, iPentane_iC5 = 12, nPentane_nC5 = 13, nHexane_C6 = 14, nHeptane_C7 = 15, nOctane_C8 = 16, nNonane_C9 = 17, nDecane_C10 = 18, Helium_He = 19, Argon_Ar = 20, }

public AGA3Result CalculateFlow(double flowTemperatureInCelcius, double pipeReferenceTemperatureInCelcius, double orificeReferenceTemperatureInCelcius, double baseTemperatureInCelcius, double staticPressureKPA, double baseStaticPressureKPA, double differentialPressureKPA, double orificeSizeMM, double pipeSizeMM, AgaConstants.MaterialType orificeMaterial, AgaConstants.MaterialType pipeMaterial, bool tapIsUpstream, GasComps gasCompositions); flowTemperatureInCelcius The flowing temperature in degrees Celsius pipeReferenceTemperatureInCelcius Specifies the reference temperature of the pipe in millimeters. orificeReferenceTemperatureInCelcius Specifies the reference temperature of the orifice in millimeters. baseTemperatureInCelcius Specifies the temperature basis for stated volumetric flow rates. staticPressureKPA The static pressure value in KPA baseStaticPressureKPA Specifies the pressure basis for stated volumetric flow rates differentialPressureKPA Specifies the differential Pressure Across the Orifice Plate orificeSizeMM Specifies the diameter of the orifice at the specified orificeReferenceTemperatureCelsuis, in Millimeters pipeSizeMM Specifies the inside diameter of the pipe at the specified reference temperature pipeReferenceTemperatureCelsuis, in Millimeters. AgaConstants.MaterialType orificeMaterial The orifice material specified with the MaterialType enumeration AgaConstants.MaterialType pipeMaterial The pipe material specified with the Material Type enumeration tapIsUpstream If the tap is upstream then set to TRUE if it is a downstream tap then set to False. gasCompositions Passing in the Gas Compositions Object as a Parameter

Without Gas Compositions Available (AGA 3 Calculation) Requires manual input of flow Compressibility, base Compressibility, and specific Gravity

flowTemperatureInCelcius The flowing temperature in degrees Celsius pipeReferenceTemperatureInCelcius Specifies the reference temperature of the pipe in millimeters. orificeReferenceTemperatureInCelcius Specifies the reference temperature of the orifice in millimeters. baseTemperatureInCelcius Specifies the temperature basis for stated volumetric flow rates. staticPressureKPA The static pressure value in KPA baseStaticPressureKPA Specifies the pressure basis for stated volumetric flow rates differentialPressureKPA Specifies the differential Pressure Across the Orifice Plate orificeSizeMM Specifies the diameter of the orifice at the specified orificeReferenceTemperatureCelsuis, in Millimeters pipeSizeMM Specifies the inside diameter of the pipe at the specified reference temperature pipeReferenceTemperatureCelsuis, in Millimeters. AgaConstants.MaterialType orificeMaterial The orifice material specified with the MaterialType enumeration AgaConstants.MaterialType pipeMaterial The pipe material specified with the Material Type enumeration tapIsUpstream If the tap is upstream then set to TRUE if it is a downstream tap then set to False. flowCompressibility - Specifies the calculated compressibility at the specified measured conditions baseCompressibility - Specifies the calculated compressibility at the specified base conditions specificGravity - Specifies the average specific gravity of the gas (ideal or real value compared to dry air). public AGA3Result CalculateFlow(double flowTemperatureInCelcius, double pipeReferenceTemperatureInCelcius, double orificeReferenceTemperatureInCelcius, double baseTemperatureInCelcius, double staticPressureKPA, double baseStaticPressureKPA, double differentialPressureKPA, double orificeSizeMM, double pipeSizeMM, AgaConstants.MaterialType orificeMaterial, AgaConstants.MaterialType pipeMaterial, bool tapIsUpstream, double flowCompressibility, double baseCompressibility, double specificGravity);

Result Object AGA result will return 5 values

public struct AGA3Result { public double BaseCompressibility_Zb; public double Compressibility_FPV; public double Flow; public double FlowingCompressibility_Zf; public double SpecificGravity; }

BaseCompressibility_Zb - Specifies the calculated compressibility at the specified base conditions. If using AGA 3 Calculation only then it will return the same value as the one inputed.

Compressibility_FPV Super compressibility correction factor

Flow The Flow in thousands of cubic meters (E3M3)

FlowingCompressibility_Zf - Specifies the calculated compressibility at the specified measured conditions. If using AGA 3 Calculation only then it will return the same value as the one inputed.

SpecificGravity - Specifies the average specific gravity of the gas (ideal or real value compared to dry air). . If using AGA 3 Calculation only then it will return the same value as the one inputed.

Example of an AGA 3 and AGA 8 Calculation 1. Create Gas Compositions Object

AGAFlowCalculation.GasComps gascomps = new AGAFlowCalculation.GasComps(); gascomps.Add(.0184, AGAFlowCalculation.AgaConstants.GasCompositions.Nitrogen_N2); gascomps.Add(0, AGAFlowCalculation.AgaConstants.GasCompositions.CarbonDioxide_CO2); gascomps.Add(.0260, AGAFlowCalculation.AgaConstants.GasCompositions.HydrogenSulfide_H2S); gascomps.Add(.7068, AGAFlowCalculation.AgaConstants.GasCompositions.Methane_C1); gascomps.Add(.1414, AGAFlowCalculation.AgaConstants.GasCompositions.Ethane_C2); gascomps.Add(.0674, AGAFlowCalculation.AgaConstants.GasCompositions.Propane_C3); gascomps.Add(.0081, AGAFlowCalculation.AgaConstants.GasCompositions.iButane_iC4); gascomps.Add(.0190, AGAFlowCalculation.AgaConstants.GasCompositions.nButane_nC4); gascomps.Add(.0038, AGAFlowCalculation.AgaConstants.GasCompositions.iPentane_iC5); gascomps.Add(.0043, AGAFlowCalculation.AgaConstants.GasCompositions.nPentane_nC5); gascomps.Add(.0026, AGAFlowCalculation.AgaConstants.GasCompositions.nHexane_C6); gascomps.Add(.0022, AGAFlowCalculation.AgaConstants.GasCompositions.nHeptane_C7);

2. Specify the Flowing Conditions double flowTemperatureInCelcius = 57; double pipeReferenceTemperatureInCelcius = 20; double orificeReferenceTemperatureInCelcius = 20; double baseTemperatureInCelcius = 15; double staticPressureKPA = 2818.09; double baseStaticPressureKPA = 101.325; double differentialPressureKPA = 10.2000; double orificeSizeMM = 9.525; double pipeSizeMM = 52.370;

3. Specify the Materials of the Orifice and Pipe AgaConstants.MaterialType orificeMaterial = AgaConstants.MaterialType.StainlessSteel; AgaConstants.MaterialType pipeMaterial = AgaConstants.MaterialType.CarbonSteel;

4. Specify the tap is upstream (true) bool tapIsUpstream = true;

5. Create AGA3 object and Execute CalculateFlow AGAFlowCalculation.Aga3 aga3calc = new AGAFlowCalculation.Aga3(); AGA3Result result = aga3calc.CalculateFlow(flowTemperatureInCelcius, pipeReferenceTemperatureInCelcius, orificeReferenceTemperatureInCelcius, baseTemperatureInCelcius, staticPressureKPA, baseStaticPressureKPA, differentialPressureKPA, orificeSizeMM, pipeSizeMM, orificeMaterial, pipeMaterial, tapIsUpstream, gascomps);

6. Resulting AGA calculations are returned in the AGA3Result object Assert.AreEqual(2.7478, result.Flow, (2.7478 * .001)); Assert.AreEqual(.7792, result.SpecificGravity, (.7792 * .001)); Assert.AreEqual(.9959, result.BaseCompressibility_Zb, (2.7478 * .001)); Assert.AreEqual(.9280, result.FlowingCompressibility_Zf, (2.7478 * .002));