Wobbe index


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Wobbe index

[′wä·bə ‚in‚deks]
(thermodynamics)
A measure of the amount of heat released by a gas burner with a constant orifice, equal to the gross calorific value of the gas in British thermal units per cubic foot at standard temperature and pressure divided by the square root of the specific gravity of the gas.
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Hospital 53b, a toll number N000042, pipeline networks at a pressure of not less than 100 kPa, calorific value of not less than 34 MJ / mA, the calorific value of not less than 31 MJ / mA with a minimum of Wobbe index of 50 MJ / mA, the content of hydrogen sulfide to 7 mg / mA, total sulfur content to 40 mg / mA of mercury vapors to 30 mg / mA.
A maximum variation of [+ or -] 4% in the Wobbe Index (WI) from the local historical average gas or, alternatively, the established adjustment or target gas for the service territory.
For the conditioning of natural gas streams, Osorb has demonstrated the ability to capture heavier hydrocarbon components, thus lowering the dew point caused by those components as well as reducing the Wobbe Index, or heating value, of the stream.
From this effective gas mixture the system uses the standard ISO6976 to calculate the gas quality characteristics, Calorific Value (CV), Wobbe Index (WI), Relative Density (RD) and Compression Factor (Z).
Construction: - the Project can well boast of carrying out routine complex works as part of the scope related to Topsides such as the fabrication and installation of the 600 tonnes, 25 m high external turret and turret mooring system, installation of the prototype four loading arms 75 MT each, lifting, installation and tie-ins for the 2100 MT re-gasification T-16 and the 400 MT T-20 wobbe index modules.
Moreover, tests with increased amounts of nitrogen were conducted on the DLE system - The results verifying that the Wobbe index range for diluted natural gases has now been expanded to 22-53 MJ/NmA.
SNAM RETE and ENAGAS will be testing the device for accuracy in measuring Calorific Value (CV), Wobbe Index, Relative Density (RD), and other criteria.
High C2+ gases can cause serious problems for gas-fired electric generators by impairing the functionality of gas turbines and possibly waiving the warranty on the turbines, particularly if the C2+ gas levels exceed 12%, the heating value exceeds 1110 Btu, and the Wobbe Index Number (a measure of gas interchangeability) exceeds 1400.
Some of this upgraded biogas will be delivered to the natural gas distribution grid, which give us the need to calculate/measure the calorific value, and in some cases also wobbe index, density and gas composition in smaller districts than today.
While the Vergence Technology allows the natural gas operator to quickly and accurately obtain Calorific Value (CV), Wobbe Index (WI), Relative Density (RD), and Compression Factor (Z) in less than three seconds; that analysis takes place after an 8 to 10 minute delay in capturing the natural gas sample from the pipeline.
From these measurements it infers an effective gas mixture comprising four components -- methane, propane, nitrogen, and measured carbon dioxide -- and then uses ISO6976 to calculate the gas quality characteristics of calorific value (CV), Wobbe index (WI), relative density (RD), and compression factor (Z).
It then uses ISO6976 to calculate the gas quality characteristics of calorific value, Wobbe index, relative density and compression factor.