Gas composition and quality for transmission

The dataset contains the hourly unvalidated gas composition and other gas quality parameters for the Danish Transmission as measured at Energinet’s gas quality measuring station in Egtved.

The values listed are for informational purposes only and are not suited for settlement purposes. Though Energinet consider the numbers to be true, we cannot guarantee the accuracy of the values. Energinet has neither verified nor approved the information.

The information can be auto validated by the user with the validation rules written for each factor in Meta Data.


Hour UTC

Description

A date and time (interval), shown in UTC time zone, where the values are valid. 00:00 o\u2019clock is the first hour of a given day interval 00:00 - 00:59 and 01:00 covers the second hour (interval) of the day and so forth. Please note: The naming is based on the length of the interval of the finest grain of the resolution.

Comment

Please note that the format shown in the example applies to data download as JSON, XML or fetched through the API and is in accordance with the ISO 8601 standard. The format is slightly different when it is shown on screen or downloaded manually as CSV or XLSX. This is mainly due to readability and consideration for Excel users.

In preview (in the GUI) all timestamps are shown as (display convention) YYYY-MM-DD hh:mmZ e.g. 2017-07-14 08:00Z. The Z will remind viewers that this is UTC.

In download (CSV and XLSX) the date time are exported as YYYY-MM-DD hh:mm e.g. 2017-07-14 08:00. That is without the \u201cT\u201d and the \u201cZ\u201d and the seconds. Excel will recognize it as date-time. The user must remember the convention about time zones.

In download (JSON and XML) the full format is used YYYY-MM-DDThh:mmZ e.g. 2017-07-14T08:00Z.

Name

HourUTC

Type

datetime

Unit
Size

17

Example

2017-07-14T08:00Z

Format
Property constraint
Validation rules

Always full hours, i.e. minutes are 00

Hour DK

Description

A date and time (interval), shown in Danish time zone, where the values are valid. 00:00 o\u2019clock is the first hour of a given day, interval 00:00 - 00:59, and 01:00 covers the second hour period (interval) of the day and so forth.

Comment

On one normal day there will be 24 intervals.

When daylight saving times shifts there will be either 23 or 25 intervals.

Please note that the format shown in the example applies to data download as JSON, XML or fetched through the API and is in accordance with the ISO 8601 standard. The format is slightly different when it is shown on screen or downloaded manually as CSV or XLSX. This is mainly due to readability and consideration for Excel users.

In preview (in the GUI) all timestamps are shown as (display convention) YYYY-MM-DD hh:mm e.g. 2017-07-14 08:00. Please note that is no time zone indicator, showning that this is local (Danish) time.

In download (CSV and XLSX) the date time are exported as YYYY-MM-DD hh:mm e.g. 2017-07-14 08:00. That is without the \u201cT\u201d and the seconds. Excel will recognize it as date-time. The user must remember that this is local (Danish) time.

In download (JSON and XML) the format used is YYYY-MM-DDThh:mm e.g. 2017-07-14T08:00.

Name

HourDK

Type

datetime

Unit
Size

17

Example

2017-07-14T08:00

Format
Property constraint
Validation rules

Always full hours, i.e. minutes are 00

Methane

Description

Methane content of the natural gas

Comment
Name

Methane

Type

number

Unit

mole - %

Size

9.2

Example

90

Format

([0-9]*[,])[0-9][0-9]

Property constraint
Validation rules

[0;100]

Ethane

Description

Ethane content of the natural gas

Comment
Name

Ethane

Type

number

Unit

mole - %

Size

9.2

Example

5.00

Format

([0-9]*[,])[0-9][0-9]

Property constraint
Validation rules

[0;100]

Propane

Description

Propane content of the natural gas

Comment
Name

Propane

Type

number

Unit

mole - %

Size

9.2

Example

2.00

Format

([0-9]*[,])[0-9][0-9]

Property constraint
Validation rules

[0;100]

I-Butane

Description

I-butane/isobutane content of the natural gas

Comment
Name

I-Butane

Type

number

Unit

mole - %

Size

9.2

Example

0.39

Format

([0-9]*[,])[0-9][0-9]

Property constraint
Validation rules

[0;100]

N-Butane

Description

N-butane content of the natural gas

Comment
Name

N-Butane

Type

number

Unit

mole - %

Size

9.2

Example

0.05

Format

([0-9]*[,])[0-9][0-9]

Property constraint
Validation rules

[0;100]

I-Pentane

Description

I-pentane/isopentane content of the natural gas

Comment
Name

I-Pentane

Type

number

Unit

mole - %

Size

9.2

Example

0.2

Format

([0-9]*[,])[0-9][0-9]

Property constraint
Validation rules

[0;100]

N-Pentane

Description

N-pentane content of the natural gas

Comment
Name

N-Pentane

Type

number

Unit

mole - %

Size

9.2

Example

0.11

Format

([0-9]*[,])[0-9][0-9]

Property constraint
Validation rules

[0;100]

Hexane+

Description

Hexane and higher hydrocarbons content of the natural gas

Comment
Name

Hexane_plus

Type

number

Unit

mole - %

Size

9.2

Example

0.04

Format

([0-9]*[,])[0-9][0-9]

Property constraint
Validation rules

[0;100]

Carbon dioxide

Description

Carbon dioxide content of the natural gas

Comment
Name

CarbonDioxide

Type

number

Unit

mole - %

Size

9.2

Example

1.0

Format

([0-9]*[,])[0-9][0-9]

Property constraint
Validation rules

[0;100]

Nitrogen

Description

Nitrogen content of the natural gas

Comment
Name

Nitrogen

Type

number

Unit

mole - %

Size

9.2

Example

0.3

Format

([0-9]*[,])[0-9][0-9]

Property constraint
Validation rules

[0;100]

Oxygen

Description

Oxygen content of the natural gas

Comment
Name

Oxygen

Type

number

Unit

mole - %

Size

9.2

Example

0.1

Format

([0-9]*[,])[0-9][0-9]

Property constraint
Validation rules

[0;100]

Gross Calorific Value

Description

A term describing the amount of heat developed 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.

Comment
Name

GrossCalorificValue-MJ_per_Nm3

Type

number

Unit

MJ/Nm\u00b3

Size

9.4

Example

43.8149

Format

([0-9]*[,])[0-9][0-9][0-9][0-9]

Property constraint
Validation rules

[35:55]

Net Calorific Value

Description

A term describing the amount of heat generated, when the tem-perature of the combustion air and the natural gas prior to com-bustion 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.

Comment
Name

NetCalorificValue-MJ_per_Nm3

Type

number

Unit

MJ/Nm\u00b3

Size

9.4

Example

39.6757

Format

([0-9]*[,])[0-9][0-9][0-9]

Property constraint
Validation rules

[30;50]

Wobbe Index

Description

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.

Comment
Name

WobbeIndex-MJ_per_Nm3

Type

number

Unit

MJ/Nm\u00b3

Size

9.4

Example

54.8543

Format

([0-9]*[,])[0-9][0-9][0-9][0-9]

Property constraint
Validation rules

[45;60]

Normal Density

Description

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.

Name

NormalDensity

Type

number

Unit

kg/Nm\u00b3

Size

9.4

Example

0.8241

Format

([0-9]*[,])[0-9][0-9][0-9][0-9]

Property constraint
Validation rules

[0.5;1]

Relative Density

Description

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.

Comment
Name

RelativeDensity

Type

number

Unit

kg/Nm\u00b3

Size

9.2

Example

0.63

Format

([0-9]*[,])[0-9][0-9]

Property constraint
Validation rules

[0.5;1]

Methane Number

Description

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.

Comment

Per definition pure methane has a methane number of 100 and pure hydrogen a methane number of 0. A content of higher hydrocarbons than methane reduces the methane number while the CO2 content increases the methane number.

Currently not available

Name

MethaneNumber

Type

number

Unit

Number

Size

3.1

Example

71

Format

([0-9]*[,])[0-9]

Property constraint
Validation rules

[50;120]

Water dew point

Description

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

Comment
Name

WaterDewPoint

Type

number

Unit

\u00b0C

Size

9.2

Example

-8

Format

([0-9]*[,])[0-9][0-9]

Property constraint
Validation rules

Hydrocarbon dew point

Description

The temperature for precipitation of liquid hydro carbons measured at the pressure with the highest hydrocarbon dew point.

Comment
Name

HydrocarbonDewPoint

Type

number

Unit

\u00b0C

Size

9.2

Example

-8

Format

([0-9]*[,])[0-9][0-9]

Property constraint
Validation rules

Hydrogen sulphide

Description

Hydrogen Sulphide content of the natural gas

Comment

The Hydrogen Sulphide is measured as mg Sulphur/Nm3

Name

HydrogenSulphide

Type

number

Unit

mg/Nm\u00b3

Size

9.2

Example

3.0

Format

([0-9]*[,])[0-9][0-9]

Property constraint
Validation rules

[0;30]

Total sulphur

Description

Total Sulphur content of the un-odorized natural gas.

Comment

Given as mg Sulphur /Nm3

Name

TotalSulphur

Type

number

Unit

mg/Nm\u00b3

Size

9.2

Example

5.0

Format

([0-9]*[,])[0-9][0-9]

Property constraint
Validation rules

[0;50]