Norm

NEN-EN-ISO 6976:2016 en

Aardgas - Berekening van de verbrandingswarmte, de stookwaarde, de dichtheid, de relatieve dichtheid en de Wobbe-index uit de samenstelling

161,21

Over deze norm

Status Definitief
Aantal pagina's 57
Gepubliceerd op 01-09-2016
Taal Engels
NEN-EN- ISO 6976 specifies methods for the calculation of gross calorific value, net calorific value, density, relative density, gross Wobbe index and net Wobbe index of natural gases, natural gas substitutes and other combustible gaseous fuels, when the composition of the gas by mole fraction is known. The methods specified provide the means of calculating the properties of the gas mixture at commonly used reference conditions. Mole fractions by definition sum to unity. Guidance on the achievement of this requirement by chromatographic analysis is available in ISO 6974-1 and ISO 6974-2. The methods of calculation require values for various physical properties of the pure components; these values, together with associated uncertainties, are provided in tables and their sources are identified. Methods are given for estimating the standard uncertainties of calculated properties. The methods of calculation of the values of properties on either a molar, mass or volume basis are applicable to any natural gas, natural gas substitute or other combustible fuel that is normally gaseous, except that for properties on the volume basis the method is restricted to mixtures for which the compression factor at reference conditions is greater than 0,9.

Details

ICS-code 75.060
Nederlandse titel Aardgas - Berekening van de verbrandingswarmte, de stookwaarde, de dichtheid, de relatieve dichtheid en de Wobbe-index uit de samenstelling
Engelse titel Natural gas - Calculation of calorific values, density, relative density and Wobbe indices from composition
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