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Metadata
Discussion

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.

Query	`https://api.energidataservice.dk/datastore_search`
Query (via SQL)	`https://api.energidataservice.dk/datastore_search_sql`

Organization

TSO Gas

TSO Gas is part of Energinet Group. TSO Gas is responsible for operation and maintenance of the Danish gas transmission system and development of the gas market.

Energinet is an independent public enterprise owned by the Danish Ministry of Energy, Utilities and Climate.

Go to organization page

Additional Info

Author: Energinet
Alias: gascomposition
Unique key: HourUTC
Resolution: One hour (PT1H)
Update frequency: PT1H
Dataset created: 4 years ago

License

Conditions for use of Danish public sector 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
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
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]
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]
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]
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]
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]
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]
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]
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]
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]
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]
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]
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]
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]
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]
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]
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]
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]
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]
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]
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]
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]
Validation rules	[0;50]