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Gas composition and quality for transmission, monthly Data

Total number of rows: 1,311


2019-09 Wobbe Index MJ/Nm³ 54.425 53.420 55.116
2019-09 Wobbe Index kWh/Nm³ 15.118 14.839 15.310
2019-09 Water Dew Point °C -19.400 -23.200 -15.600
2019-09 Total Sulphur mg/Nm³ None None None
2019-09 Relative Density [-] 0.610 0.576 0.653
2019-09 Propane mole - % 1.270 0.040 3.120
2019-09 Normal Density kg/Nm³ 0.788 0.744 0.844
2019-09 Nitrogen mole - % 0.290 0.250 0.600
2019-09 Net Calorific Value MJ/Nm³ 38.393 36.565 40.248
2019-09 Net Calorific Value kWh/Nm³ 10.665 10.157 11.180
2019-09 N-pentane mole - % 0.050 0.000 0.090
2019-09 N-butane mole - % 0.350 0.010 0.680
2019-09 Methane Number [-] 73.500 69.700 79.900
2019-09 Methane mole - % 92.500 86.920 96.340
2019-09 I-pentane mole - % 0.120 0.000 0.200
2019-09 I-butane mole - % 0.300 0.040 0.480
2019-09 Hydrogen Sulphide mg/Nm³ 1.600 0.500 3.600
2019-09 Hydro Carbon Dew Poi °C -10.600 -13.500 -6.600
2019-09 Hexane+ mole - % 0.050 0.020 0.080
2019-09 Gross Calorific Valu MJ/Nm³ 42.496 40.540 44.474
2019-09 Gross Calorific Valu kWh/Nm³ 11.804 11.261 12.354
2019-09 Ethane mole - % 4.570 2.870 7.230
2019-09 Carbon dioxide mole - % 0.510 0.150 1.160
2019-08 Wobbe Index MJ/Nm³ 54.896 54.626 55.181
2019-08 Wobbe Index kWh/Nm³ 15.249 15.174 15.328
2019-08 Water Dew Point °C -18.900 -35.900 -16.200
2019-08 Total Sulphur mg/Nm³ 1.600 None None
2019-08 Relative Density [-] 0.637 0.624 0.659
2019-08 Propane mole - % 2.310 1.820 3.140
2019-08 Normal Density kg/Nm³ 0.823 0.806 0.852
2019-08 Nitrogen mole - % 0.300 0.280 0.340
2019-08 Net Calorific Value MJ/Nm³ 39.620 39.380 40.162
2019-08 Net Calorific Value kWh/Nm³ 11.006 10.939 11.156
2019-08 N-pentane mole - % 0.090 0.070 0.110
2019-08 N-butane mole - % 0.620 0.550 0.730
2019-08 Methane Number [-] 71.800 69.600 73.000
2019-08 Methane mole - % 89.440 86.600 91.130
2019-08 I-pentane mole - % 0.160 0.120 0.190
2019-08 I-butane mole - % 0.420 0.370 0.460
2019-08 Hydrogen Sulphide mg/Nm³ 2.700 1.700 3.800
2019-08 Hydro Carbon Dew Poi °C -9.400 -11.400 -7.600
2019-08 Hexane+ mole - % 0.060 0.040 0.080
2019-08 Gross Calorific Valu MJ/Nm³ 43.806 43.556 44.374
2019-08 Gross Calorific Valu kWh/Nm³ 12.168 12.099 12.326
2019-08 Ethane mole - % 5.730 5.110 6.880
2019-08 Carbon dioxide mole - % 0.860 0.320 1.650
2019-07 Wobbe Index MJ/Nm³ 54.913 54.601 55.134
2019-07 Wobbe Index kWh/Nm³ 15.253 15.167 15.315
2019-07 Water Dew Point °C -13.700 -27.900 -7.100
2019-07 Total Sulphur mg/Nm³ None None None

Data Dictionary

Column Type Label Description
Month date
Qualityvalue text
Unit text
Average float8
Min float8
Max float8

Month

Name Month
Description

Year and month

Comment
Example 2017-01
Unit Months
Field Month
Property Constraint
Type date
Size 7
Format Regex
Validation Rules

Gas quality parameter

Name Gas quality parameter
Description

For each month there are 20 rows with average, min. and max. values for the following gas quality parameters:

Methane, Ethane, Propane, I-butane, N-butane, I-pentane, N-pentane, Hexane+, Carbon dioxide, Nitrogen, and Oxygen. All of these are components of the natural gas and have mole % as unit.

The remaining of the 20 gas quality parameters are described in greater detail below

Gross Calorific Value: A term describing the amount of heat de-veloped by combustion of one cubic metre of gas at constant pressure when the gas and air for the combustion have a temperature of 25°C, the combustion products being brought to that temperature and the water formed by the combustion being present in liquid state. The reference conditions for normal cubic metres are 0°C and 1 atm.

Net Calorific Value: A term describing the amount of heat generated, when the temperature of the combustion air and the natural gas prior to combustion is 25°C, when the combustion products (flue gas) are cooled to 25°C, and when the water produced during combustion is present in the form of steam. The reference conditions for normal cubic metres are 0°C and 1 atm.

Wobbe Index: The Wobbe index offers information about the heating effect a burner is exposed to during combustion of a fuel. The greater the Wobbe index, the greater the heating effect and thereby the greater the load on the burner. The load on a burner is thus directly proportional to the Wobbe index. Different gases with the same Wobbe index will impose the same load on the burner. The Wobbe index can be calculated as the gross calorific value divided by the square root of the relative density.

Normal Density: Normal density is the mass of a normal cubic meter of gas. The reference conditions for normal cubic metres are 0°C and 1 atm. Relative Density: The relative density aka the specific gravity is the density of natural gas divided by the density of air at the same pressure and temperature, and is an expression of the amount of heavier hydrocarbons that are in the natural gas.

Methane Number: A methane number characterises the gas's knock tendency as a fuel for gas engines. It can be compared to the octane number for petrol.

Water Dew Point: Water content of gas described as dew point at the absoluite pressure of 70 bar.

Hydro Carbon Dew Point: The temperature for precipitation of liquid hydro carbons measured at the pressure with the highest hydrocarbon dew point.

H2S: Hydrogen Sulphide content of the natural gas

Total Sulphur: Total Sulphur content of the un-odorized natural gas.

H2S and total sulphur are given as the measurement in Nybro.

Comment
Example Methane
Unit text
Field Qualityvalue
Property Constraint
Type text
Size 20
Format Regex
Validation Rules

Unit

Name Unit
Description

Unit for the gas quality values. Possible values are:

  • mole - %
  • kWh/Nm³
  • MJ/Nm³
  • kg/Nm³
  • [-]
  • °C
  • mg/Nm³
  • kg/GJ
Comment
Example kWh/Nm³
Unit text
Field Unit
Property Constraint
Type text
Size 20
Format Regex
Validation Rules

Gas quality average

Name Gas quality average
Description

Average value for the gas quality parameters.

Comment
Example 43.792
Unit Number
Field Average
Property Constraint
Type float
Size 7.3
Format Regex
Validation Rules

Min

Name Min
Description

Montly minimum value for the gas quality parameters.

Comment
Example 41.609
Unit Number
Field Min
Property Constraint
Type float
Size 7.3
Format Regex
Validation Rules

Max

Name Max
Description

Monthly maximum value for the gas quality parameters.

Comment
Example 44.111
Unit Number
Field Max
Property Constraint
Type float
Size 7.3
Format Regex
Validation Rules