Progas 2007 - Calculation Tool for Caloric and Dynamic Properties of Mixtures of Real Natural Gases
Calculation FeaturesAbout the Tool
Validation
Sample Input File
Sample Output File
License and Downloads
Copyright
Liability
Userguide
Calculation Features
- Composition of components in Mole %, Volume %, Weight % normative and ultimate Weight % for C-H-N-O-S-He-Ar
- Molar mass & gas constant according to DIN 1871-1999, ISO 6976-1995, ASTM D3588-1998, extendable
- Low & high heat value according to ISO 6976-1995 (0°C 15°C 25°C), ASTM D3588-1998 extendable
- Caloric properties according to AGA8-DC92 (ISO 12213-2) and ISO 20765-1-2005 (Helmholtz free energy approach). The method is applicable to pipeline-quality gases within the ranges of pressure and temperature at which transmission and distribution operations normally take place.
- Density
- Compression
- Inner energy
- Enthalpy
- Entropy
- Heat capacity cp & cv
- Isentropic exponent
- Joule Thomson coefficient
- Speed of sound
- Transport Properties according to Schley VDI Reihe 7 No. 418-2001
- Dynamic viscosity
- Heat circuit capacity
- Optional flow Calculation all devices in ISO 5167-2003
- Orifice with Corner Tapping
- Orifice with Flange Tapping
- Orifice with D & D/2 Tapping
- ISA 1932 Nozzle
- Long Radius Nozzle
- Venturi Nozzle
- Classical Venturi Tube with »as cast« convergent section
- Classical Venturi Tube with machined convergent section
- Classical Venturi Tube with rough-welded sheet-iron convergent section
- Calibrated or standard discharge coefficient
- Diameter correction for temperature
About the tool
I developed this tool to have a light-weight, easy to use and fast calculation for real gas properties. The tool is compiled from FORTRAN code and runs on any DOS or WINDOWS based computer. There is no installation required, the application runs out of the box and does not touch the system's registry. Input and Output files are ASCII Text.
For handling the input file a comfortable text editor with overwrite option is recommended e.g. Notepad2.
Validation
The main feature of the tool is ISO 20765, which is state of the art calculation for real natural gas mixtures. The tool can be validated versus published example calculations provided in Annex G of ISO 20765-1:2005
The Sample Output File meets the therein published numbers for Gas 4 at 10 MPa and 350 K. I have chosen this gas because it contains all 21 components used in the code. The results can be directly compared, with exception of entropy, because a different reference is used. To validate entropy it is necessary to run 2 calculations and compare the differences in entropy.
Heat values and flow calculations have been validated and can be checked with published example calculations or little manual effort.
Send me your gas composition if you would like to have your own example calculation.
Sample Input File
GAS 4 ISO 20765-1 2005(E)
100.0 ,'= gas pressure.................................................[bar absolut]'
76.85 ,'= gas temperature....................................................[deg C]'
0.432 ,'= pressure drop across flow element.....0.0 skip flow calculation......[bar]'
0.2025 ,'= pipe diameter..........................................................[m]'
22.3 ,'= pipe diameter reference temperature................................[deg C]'
11 ,'= pipe material 10NOcorr 11steel1 12steel2 13steel3 14steel4 15steel5....[-]'
0.1229 ,'= flow element diameter orifice/nozzle/venturi nozzle/venturi tube.......[m]'
8.33 ,'= flow element diameter reference temperature........................[deg C]'
15 ,'= flow element material 16steel6 17SnBz4 18E-Cu 19Rg9 20Ms63 21Ni 22HaC..[-]'
0.6231 ,'= discharge coefficient 1 from calibration.....0.0 skip calibration......[-]'
0.6255 ,'= discharge coefficient 2 from calibration...............................[-]'
0.62345D5 ,'= reynoldsnumber 1 from calibration with pipe diameter...................[-]'
0.62345D7 ,'= reynoldsnumber 2 from calibration with pipe diameter...................[-]'
ISO00.DTA ,'= data filename for heat values and molar masses.........................[-]'
0 ,'= gas composition given in..........................0[mol%] 1[vol%] 2[wght%]'
3 ,'= flow element 1ORcor 2ORfla 3ORdd2 4NOisa 5NOlra 6VEnoz 7VTasc 8VTmac 9VTrw'
9.5 ,'= (1) ,%,H2...........hydrogen '
0.02 ,'= (2) ,%,He...........helium '
0.01 ,'= (3) ,%,H2O..........water vapor '
1.0 ,'= (4) ,%,CO...........carbon monoxide '
10. ,'= (5) ,%,N2...........nitrogen '
0.01 ,'= (6) ,%,O2...........oxygen '
0.01 ,'= (7) ,%,H2S..........hydrogen sulfide '
0.01 ,'= (8) ,%,Ar...........argon '
1.6 ,'= (9) ,%,CO2..........carbon dioxide '
73.50 ,'= (10) ,%,CH4..........methane '
3.3 ,'= (11) ,%,C2H6.........ethane '
0.74 ,'= (12) ,%,C3H8.........propane '
0.08 ,'= (13) ,%,i-C4H10......iso-butane '
0.08 ,'= (14) ,%,n-C4H10......n-butane '
0. ,'= (15) ,%,neo-C5H12....neo-pentane '
0.04 ,'= (16) ,%,i-C5H12......iso-pentane '
0.04 ,'= (17) ,%,n-C5H12......n-pentane '
0.02 ,'= (18) ,%,n-C6H14......n-hexane '
0.01 ,'= (19) ,%,n-C7H16......n-heptane '
0.01 ,'= (20) ,%,n-C8H18......n-octane '
0.01 ,'= (21) ,%,n-C9H20......n-nonane '
0.01 ,'= (22) ,%,n-C10H22.....n-decane '
0. ,'= (23) ,%,SO2..........sulfur dioxide '
0. ,'= (24) ,%,c-C5H10......cyclopentane '
0. ,'= (25) ,%,c-C6H12......cyclohexane '
0. ,'= (26) ,%,CH3-C5H9.....methylcyclopentane '
0. ,'= (27) ,%,CH3-C6H11....methylcyclohexane '
0. ,'= (28) ,%,2,2-i-C6H14..2,2-dimethylbutane '
0. ,'= (29) ,%,2,3-i-C6H14..2,3-dimethylbutane '
0. ,'= (30) ,%,C6H6.........benzene '
0. ,'= (31) ,%,C7H8.........toluene '
0. ,'= (32) ,%,o-C8H10......o-xylene '
Screen-shot DOS Window - The calculation terminated successfully
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Sample Output File
PROGAS (Version 15-Mar-2007) Calculation for Mixtures of Real Gases 20-Apr-2008 15:32:22
GAS 4 ISO 20765-1 2005(E) Annex G Results for Comparison
Actual Gas Conditions
Pressure 100.00 bar a =1450.38 psia
Temperature 76.85 degC = 170.33 degF
Sum of Given Gas Composition = 100.0000 Mol%
Results Mol% Vol% Wght%
Hydrogen.....................H2 9.5000 9.5310 1.1059
Helium.......................He 0.0200 0.0201 0.0046
Water Vapor.................H2O 0.0100 0.0093 0.0104
Carbon Monoxide..............CO 1.0000 1.0020 1.6175
Nitrogen.....................N2 10.0000 10.0216 16.1769
Oxygen.......................O2 0.0100 0.0100 0.0185
Hydrogen Sulfide............H2S 0.0100 0.0099 0.0197
Argon........................Ar 0.0100 0.0100 0.0231
Carbon Dioxide..............CO2 1.6000 1.5935 4.0663
Methane.....................CH4 73.5000 73.5185 68.0926
Ethane.....................C2H6 3.3000 3.2757 5.7303
Propane....................C3H8 0.7400 0.7263 1.8844
iso-Butane..............i-C4H10 0.0800 0.0768 0.2685
n-Butane................n-C4H10 0.0800 0.0768 0.2685
neo-Pentane...........neo-C5H12 0.0000 0.0000 0.0000
iso-Pentane.............i-C5H12 0.0400 0.0376 0.1667
n-Pentane...............n-C5H12 0.0400 0.0368 0.1667
n-Hexane................n-C6H14 0.0200 0.0179 0.0995
n-Heptane...............n-C7H16 0.0100 0.0083 0.0579
n-Octane................n-C8H18 0.0100 0.0074 0.0660
n-Nonane................n-C9H20 0.0100 0.0061 0.0741
n-Decane...............n-C10H22 0.0100 0.0044 0.0822
Sulfur Dioxide..............SO2 0.0000 0.0000 0.0000
Cyclopentane............c-C5H10 0.0000 0.0000 0.0000
Cyclohexane.............c-C6H12 0.0000 0.0000 0.0000
Methylcyclopentane.....CH3-C5H9 0.0000 0.0000 0.0000
Methylcyclohexane.....CH3-C6H11 0.0000 0.0000 0.0000
2,2-Dimethylbutane..2,2-i-C6H14 0.0000 0.0000 0.0000
2,3-Dimethylbutane..2,3-i-C6H14 0.0000 0.0000 0.0000
Benzene....................C6H6 0.0000 0.0000 0.0000
Toluene....................C7H8 0.0000 0.0000 0.0000
o-xylene................o-C8H10 0.0000 0.0000 0.0000
Sum 100.000 100.000 100.000
Ultimate Analysis in Weight%
C=59.9415 H=19.9273 O= 3.9081 N=16.1769 S= 0.0185 HE= 0.0046 AR= 0.0231
C+H+O+N+S+HE+AR = 100.0001
Molar Mass = 17.3170 kg/kmol
Gas Constant = 480.135 J/(kg*K)
Low Heat Value = 39.729 MJ/kg = 17081. BTU/lb
High Heat Value = 44.185 MJ/kg = 18996. BTU/lb
Pressure 1.013bar 1.013bar 1.013bar 14.73psi Actual
Temperature 0. degC 15. degC 25. degC 60. degF Actual
------------------------------------+---------+---------+---------+---------+
Low Heat Value MJ/m3 30.755 29.144 28.161 29.155 2480.543
Low Heat Value BTU/ft3 825.4 782.2 755.8 782.5 66575.3
High Heat Value MJ/m3 34.204 32.412 31.319 32.425 2758.736
High Heat Value BTU/ft3 918.0 869.9 840.6 870.2 74041.7
Density kg/m3 0.7741 0.7336 0.7088 0.7338 62.4360
Density lb/ft3 0.0483 0.0458 0.0443 0.0458 3.8979
Relative Density 0.5987 0.5986 0.5985 0.5986
Compression Factor 0.99803 0.99839 0.99859 0.99840 0.95309
Inner Energy kJ/kg -182.385 -159.342 -143.749 -158.483 -106.063
Enthalpy kJ/kg -51.494 -21.214 -0.799 -20.087 54.101
Entropy kJ/(kg*K) -0.1796 -0.0716 -0.0020 -0.0688 -1.9967
Heat Capacity cp kJ/(kg*K) 2.0058 2.0321 2.0512 2.0331 2.5087
Heat Capacity cv kJ/(kg*K) 1.5206 1.5475 1.5671 1.5486 1.7374
Isentropic Exponent 1.3165 1.3110 1.3071 1.3108 1.4123
Joule Thomson Coeff. K/bar 0.4627 0.4137 0.3845 0.4120 0.1996
Speed of Sound m/s 415.105 425.537 432.263 425.915 475.610
Dynamic Viscosity Pa*s*E-6 10.954 11.477 11.821 11.496 15.329
HeatCircuitCapacityW/(m*K) 0.0286 0.0306 0.0320 0.0307 0.0462
ISO6976-1995 for Molar Mass & Calorific Values @0degC
ISO 20765-1 2005 for Thermodynamic Properties
Flow Element Diameter 123.05 mm (122.90 mm at 8.33 degC Steel 5)
Pipe Diameter 202.64 mm (202.50 mm at 22.30 degC Steel 1)
Diameter Ratio 0.6072
Pressure Difference Across Flow Element 432.00 mbar = 6.27 psi
Calibrated Discharge Coefficient
Calibration Differs from ISO standard formulae by 3.40 %
Mass Flow alpha Flow C Discharge Expansion RE Reynolds Kinematic Mach
Coefficient Coefficient Factor # (dPipe) Viscosity
-----------+-----------+-----------+-----------+-----------+----------------+---------+
18.577 kg/s 0.67348 0.62604 0.99877 0.76149E+07 0.24551E-06 m2/s 0.0526
Orifice with d&d/2 Tapping
ISO5167-2003 for Flow Calculation
Application developed by Axel Ebert, Germany & Switzerland
License and Downloads
permission to distribute within the purchasing organisation
permission to modify and distribute within the purchasing organisation
The license fee can be paid into a Swiss or German bank account. Details will be given with the order. The executable [EXE 496 kB] will be sent via e-Mail.
Axel Ebert
Kirchweg 43A
5415 Nussbaumen AG
Switzerland
Contact Form
Copyright
Axel Ebert is the developer and exclusive copyright holder of PROGAS-2007 documents and software (the Materials). The copyright holder reserves all rights.
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Liability
Axel Ebert, the developer and exclusive copyright holder of PROGAS-2007 documents and software (the Materials) has made his best effort to deliver a reliable version of this software and to verify the calculations contained herein on the basis of sound scientific judgment.
However, the developer does not warrant or assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, text, graphics, product, process or other items contained within these Materials disclosed. The developer will not be liable for any direct, indirect, special or consequential damages arising out of any use of the software or documentation.
The developer may make changes to these Materials, or to the products described therein, at any time without notice. The developer makes no commitment to update the Materials.