Loading...

Gas composition and quality for transmission, monthly Data

Total number of rows: 1,495


2020-05 Wobbe Index MJ/Nm³ 53.469 53.388 54.832
2020-05 Wobbe Index kWh/Nm³ 14.852 14.830 15.231
2020-05 Water Dew Point °C -21.500 -22.900 -20.600
2020-05 Total Sulphur mg/Nm³ None None None
2020-05 Relative Density [-] 0.578 0.575 0.643
2020-05 Propane mole - % 0.160 0.050 2.800
2020-05 Normal Density kg/Nm³ 0.747 0.744 0.832
2020-05 Nitrogen mole - % 0.290 0.260 0.330
2020-05 Net Calorific Value MJ/Nm³ 36.668 36.526 39.784
2020-05 Net Calorific Value kWh/Nm³ 10.186 10.146 11.051
2020-05 N-pentane mole - % 0.000 0.000 0.080
2020-05 N-butane mole - % 0.030 0.010 0.600
2020-05 Methane Number [-] 71.500 71.500 71.500
2020-05 Methane mole - % 96.060 88.030 96.430
2020-05 I-pentane mole - % 0.010 0.000 0.080
2020-05 I-butane mole - % 0.050 0.040 0.220
2020-05 Hydrogen Sulphide mg/Nm³ 2.400 1.600 2.700
2020-05 Hydro Carbon Dew Poi °C -6.300 -17.700 -4.500
2020-05 Hexane+ mole - % 0.020 0.020 0.050
2020-05 Gross Calorific Valu MJ/Nm³ 40.650 40.500 43.978
2020-05 Gross Calorific Valu kWh/Nm³ 11.292 11.250 12.216
2020-05 Ethane mole - % 2.970 2.690 6.740
2020-05 Carbon dioxide mole - % 0.420 0.370 1.070
2020-04 Wobbe Index MJ/Nm³ 53.477 53.388 54.011
2020-04 Wobbe Index kWh/Nm³ 14.855 14.830 15.003
2020-04 Water Dew Point °C -22.800 -23.800 -21.800
2020-04 Total Sulphur mg/Nm³ 1.400 None None
2020-04 Relative Density [-] 0.579 0.575 0.604
2020-04 Propane mole - % 0.180 0.040 1.220
2020-04 Normal Density kg/Nm³ 0.748 0.744 0.781
2020-04 Nitrogen mole - % 0.290 0.250 0.320
2020-04 Net Calorific Value MJ/Nm³ 36.691 36.526 37.908
2020-04 Net Calorific Value kWh/Nm³ 10.192 10.146 10.530
2020-04 N-pentane mole - % 0.010 0.000 0.030
2020-04 N-butane mole - % 0.030 0.010 0.250
2020-04 Methane Number [-] 0.000 0.000 0.000
2020-04 Methane mole - % 96.000 92.840 96.450
2020-04 I-pentane mole - % 0.010 0.000 0.030
2020-04 I-butane mole - % 0.050 0.040 0.110
2020-04 Hydrogen Sulphide mg/Nm³ 1.400 0.700 3.000
2020-04 Hydro Carbon Dew Poi °C -8.000 -17.600 -4.900
2020-04 Hexane+ mole - % 0.020 0.020 0.030
2020-04 Gross Calorific Valu MJ/Nm³ 40.674 40.496 41.976
2020-04 Gross Calorific Valu kWh/Nm³ 11.298 11.249 11.660
2020-04 Ethane mole - % 2.990 2.700 4.500
2020-04 Carbon dioxide mole - % 0.420 0.370 0.690
2020-03 Wobbe Index MJ/Nm³ 53.508 53.413 54.382
2020-03 Wobbe Index kWh/Nm³ 14.863 14.837 15.106
2020-03 Water Dew Point °C -22.100 -23.200 -21.300
2020-03 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\u00b0C, 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\u00b0C 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\u00b0C, when the combustion products (flue gas) are cooled to 25\u00b0C, and when the water produced during combustion is present in the form of steam. The reference conditions for normal cubic metres are 0\u00b0C 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\u00b0C 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 string
Size 20
Format Regex
Validation Rules

Unit

Name Unit
Description

Unit for the gas quality values. Possible values are:

  • mole - %
  • kWh/Nm\u00b3
  • MJ/Nm\u00b3
  • kg/Nm\u00b3
  • [-]
  • \u00b0C
  • mg/Nm\u00b3
  • kg/GJ
Comment
Example kWh/Nm\u00b3
Unit text
Field Unit
Property Constraint
Type string
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 number
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 number
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 number
Size 7.3
Format Regex
Validation Rules