A presentation on the utilisation of containerised gas engines for conversion of flare gas (associated petroleum gas) for electricity with case studies in Nigeria, Tunisia, Australia, New Zealand and Russia.
Flare Gas and Containerised Engines, Nigeria Oil & Gas Technology, Lagos, 4th June 2013
•Established 1989 in UK as aengine service company,1998 Australia•Turnover of £208m in 2012,approx $100m in Australia•800 employees worldwide•GE Jenbacher’s largestdistributor•Purpose designed office &warehouse facility in Adelaideand Auckland•Only service businessfocused 100% on gas powergeneration
• Has one product & onefocus: the GE gas enginerange• GE Jenbacher distributor& service provider in 10countries• Supplied and sold over2.7GWe of Jenbacherfacilities• Turnkey EPC contractor,responsibilities include– Control systems– Civil works– Buildings & enclosures– Acoustics & ventilation– Balance of plant– Wiring & piping• Full maintenance,operation & overhaulservices
•Advantages:–“Cross flow” cylinder head(external exhaust gasmanifolds)–Clear separation of coldmixture inlet and hotexhaust gas–Exactly defined thermalzones in the cylinder head–Long cylinder head life time–Better accessibility to theexhaust gas manifolds
• 0.3-9.5MWe per unit• Electrical efficiency up to 48.7% electrical efficiencyAdditional benefits with multi-engine approach• High fuel efficiency: engines constantly running at nominal load andefficiency• Availability and reliability: stable electrical output• Flexibility: scheduled maintenance in sequence
• Heating valueCalorific value and thermal value indicate the energy content of a gas. Theformer can be differentiated from the later only through the heat ofvaporization of the water resulting from combustion, the water is in liquidform after it has already liberated its condensation heat• Methane numberDeterminant parameter for knocking resistance of a gas. It is comparable tothe Octane Number of gasoline and indicates the percentage methanevolume ratio of a methane-hydrogen mixture which, in a test engine andunder controlled conditions, indicates the same knocking resistance as thegas to be tested.• Laminar flame speedLaminar flame speed is the speed at which the oxidation takes place. It isimportant to evaluate the gas analysis in case of high content of inertcompounds (e.g. CO2).
Flare gas featuresConstituent Chemical Symbol % compositionMethane CH4 60-90Ethane C2H6 2-20Propane C3H8 3-15Butane C4H10 2-10Feature MeasurementLower heating value 11-17 kWh/Nm3Methane number 40-65
Waha, Flare Gas Project• Waha, located 300km south of Djerba is the site of the first associatedpetroleum gas (APG) project in• Tunisia. Here gas which would ordinarily be flared is converted intoelectricity for the surrounding facilities.• The project was jointly developed by the US-based Pioneer NaturalResources and the Tunisian• Government Organisation ETAP (Enterprise Tunisienne d’ActivitiésPétroliѐres).• The area where the generators are located is subject to extremeenvironmental conditions. This led to the• enclosures being designed to resist winds of up to 180km/h, temperaturesbetween -5 C and 55 C and sand-storms.◦ ◦• The APG which is found at the site has a methane concentration of 73%which is ideally suited to GE Jenbacher gas engines.• The utilisation of the gas in engines, as opposed to flaring helps to reducecarbon emissions and improve the environmental performance of the site.
McKee &Mangahewa,New ZealandNew ZealandFlare gas2 x JGMC3202MWe
Biogas from waste2 x J320,2.0MWeLandfill GasProject, France
2 x JMC 320 GS-S.LElectrical Output:1,534 kWThermal Output:2,196 kWCommissioning 2001, installation by thirdparty
3 x JMC 320 GS-S.LElectrical Output: 3,039 kWThermal Output: 3,894 kWCommissioning: June 2003
Clarke Energy28 Joel Ogunnaike,Ikeja, GRA.Lagos.+234 1 815 6723www.clarke-energy.comWaleraphael.firstname.lastname@example.org