2004-10-11

hydrocarbon species such as ethane and propane have a higher Wobbe Index than pipeline quality natural gas so a reduced fuel volume is required.

The volume flow through an orifice is basically related to the formula for velocity pressure in the hole and the heat release of the eventual flame is the calorific value x the volumetric flow. The Wobbe Index is sometimes called the Interchangeability Factor.¹ Symbol, WN or WI.² . The Wobbe number is named for the Italian engineer Goffredo Wobbe, who in 1926 published a paper³ defining a measure of fuel gas “quality”, with the idea that fuels of the same quality would be interchangeable. Only gases that have the same Wobbe index are interchangeable. For LPG to have the same Wobbe index as CNG, it has to be mixed with air. A 60:40 ratio for LPG:air mixing is common but it depends upon the composition of LPG because LPG itself is a mixture of propane and butane. Therefore, the most common applications for LHV Wobbe Index systems are: (Petro) Chemical plants Blast-furnace and cokery plants Cogeneration power plants Fuel gas control for burners and ovens Gas bottles production Gas turbines & gas engines Glass and porcelain factories (furnaces & ovens control) The GA500™ burns a sample of the LPG/Air mixture to provide an accurate measurement of the Wobbe Index.

Lpg wobbe index

Abstract [en]. In this report, the technical and economical feasibility to produce pressure, temperature, density, dynamic viscosity, energy flow, Wobbe index, Promag, Promass 100, CNG-, LNG-, LPGmass, Promag 400 Index C, Proline Bio-Propane from glycerol for biogas addition2008Rapport (Övrigt vetenskapligt). Abstract [en]. In this report, the technical and economical feasibility to produce ethane, propane, butane, mainlyeffecting knock resistance leading to engine in the methane gas: Higher heating value Lower heating value Wobbe index.

For safety reasons, LPG has a special odour added to help detect leaks.

Man måste bara rätta till lambdamätningen med CNG Wobbe index om bildatorn inte gör det själv. Men jag har ingen OBD-läsare, och kanske

Umeå. LPG is used to heat drying furnaces and 5.3 Wobbeindex .

pressure, temperature, density, dynamic viscosity, energy flow, Wobbe index, Promag, Promass 100, CNG-, LNG-, LPGmass, Promag 400 Index C, Proline

C4H10.

If is the higher heating value, or higher calorific value, and is the specific gravity, the Wobbe Index, , is defined as: Apparatus for measuring the combustion characteristics of a gaseous fuel. Wobbe index and calorific value are measured with a fast response time by maintaining a stoichiometric mixture in a mixer supplied with the gaseous fuel at a constant pressure together with ambient air. The pressure of ambient air is controlled by measuring the residual oxygen from combustion of the mix and employing In Europe a gas interchangeability index (the Wobbe Index) is also specified. The Wobbe Index is defined as HHV/ √Gas Specific Gravity (relative to Air) and is often more stringent than the heating value specification.
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Specific Energy, (Btu/lb). Percent Hydrogen, (by WOBBE INDEX (MJ / Nm 3 ). Gaseous Fuel propane/butane mixtures are compiled from commonly available sources and are Propane. %.

So muss man z.B.
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ether (BioDME) to existing LPG (Liquified Petroleum Gas) facility at the Volvo Cab plant in. Umeå. LPG is used to heat drying furnaces and 5.3 Wobbeindex .

The GA500™ burns a sample of the LPG/Air mixture to provide an accurate measurement of the Wobbe Index. Gas flows through a fixed orifice; there are no moving parts or complex operation which means reliability is unparalleled.

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In Europe a gas interchangeability index (the Wobbe Index) is also specified. The Wobbe Index is defined as HHV/ √Gas Specific Gravity (relative to Air) and is often more stringent than the heating value specification. British Standard 7859 provides all the details on standard conditions, component heating values, ideal vs. non-ideal

2 Thermodynamics and Transfer Phenomena Department. Simón Bolívar University. Valle de Sartenejas, Baruta, Edo. Miranda. Venezuela. AP.89000. 1. Background Wobbe index In the LNG terminal, the quality specification of the delivery gas must comply with the specifications set by pipeline transmission companies and end users to ensure operational safety, reliability, and compliance with environmental regulations.