Gas composition and quality for transmission

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.

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.

HourUTC

datetime

17

2017-07-14T08:00Z

Always full hours, i.e. minutes are 00

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.

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.

HourDK

datetime

17

2017-07-14T08:00

Always full hours, i.e. minutes are 00

Methane content of the natural gas

Methane

number

mole - %

9.2

90

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

[0;100]

Ethane content of the natural gas

Ethane

number

mole - %

9.2

5.00

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

[0;100]

Propane content of the natural gas

Propane

number

mole - %

9.2

2.00

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

[0;100]

I-butane/isobutane content of the natural gas

I-Butane

number

mole - %

9.2

0.39

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

[0;100]

N-butane content of the natural gas

N-Butane

number

mole - %

9.2

0.05

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

[0;100]

I-pentane/isopentane content of the natural gas

I-Pentane

number

mole - %

9.2

0.2

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

[0;100]

N-pentane content of the natural gas

N-Pentane

number

mole - %

9.2

0.11

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

[0;100]

Hexane and higher hydrocarbons content of the natural gas

Hexane_plus

number

mole - %

9.2

0.04

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

[0;100]

Carbon dioxide content of the natural gas

CarbonDioxide

number

mole - %

9.2

1.0

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

[0;100]

Nitrogen content of the natural gas

Nitrogen

number

mole - %

9.2

0.3

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

[0;100]

Oxygen content of the natural gas

Oxygen

number

mole - %

9.2

0.1

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

[0;100]

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.

GrossCalorificValue-MJ_per_Nm3

number

MJ/Nm\u00b3

9.4

43.8149

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

[35:55]

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.

NetCalorificValue-MJ_per_Nm3

number

MJ/Nm\u00b3

9.4

39.6757

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

[30;50]

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.

WobbeIndex-MJ_per_Nm3

number

MJ/Nm\u00b3

9.4

54.8543

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

[45;60]

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.

NormalDensity

number

kg/Nm\u00b3

9.4

0.8241

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

[0.5;1]

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.

RelativeDensity

number

kg/Nm\u00b3

9.2

0.63

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

[0.5;1]

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.

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

MethaneNumber

number

Number

3.1

71

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

[50;120]

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

WaterDewPoint

number

\u00b0C

9.2

-8

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

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

HydrocarbonDewPoint

number

\u00b0C

9.2

-8

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

Hydrogen Sulphide content of the natural gas

The Hydrogen Sulphide is measured as mg Sulphur/Nm3

HydrogenSulphide

number

mg/Nm\u00b3

9.2

3.0

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

[0;30]

Total Sulphur content of the un-odorized natural gas.

Given as mg Sulphur /Nm3

TotalSulphur

number

mg/Nm\u00b3

9.2

5.0

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

[0;50]