MAN Engines will be unveiling their new E3262 E302 natural-gas engine for co-generation plants at this year’s ‘EnergyDecentral’ trade fair. Thanks to stoichiometric combustion (λ=1), a three-way catalytic converter is all that is needed to reduce nitrogen oxides and carbon monoxide on this twelve-cylinder engine. “Avoiding the use of an SCR system has resulted in a highly efficient and, above all, cost-effective exhaust gas aftertreatment system that enables even very low local emissions limits to be met,” says, Hubert Gossner, Head of Power MAN Engines.
In other words, the MAN engine, in combination with suitable exhaust gas aftertreatment systems, is an effective way of meeting all currently applicable emissions guidelines around the world. Furthermore, the MAN E3262 E302 achieves a carbon monoxide value of < 100 mg/Nm3, which lies below the limits currently being discussed for the amendment to the Technical Instructions on Air Quality Control (‘TA Luft’).
Achieving an output of 275 kWmech at 1500 rpm (50 Hz), the twelve-cylinder engine outperforms its predecessor, the E2842 E312 naturally-aspirated engine, by ten percent. MAN engineers were able to increase output by enlarging the bore to 132 mm, which has increased cubic capacity to 25.8 L. Optimised combustion and a cylinder head with four-valve technology, meanwhile, have helped to increase overall efficiency to 93.6%. Contributing to the latter are a thermal efficiency of 54% and an outstanding mechanical efficiency of 39.6% representing improvements of more than six percent and 2.4 percent respectively.
Increased output and improved efficiency aside, the latest naturally-aspirated engine from MAN Engines also provides extra convenience:
The E3262 E302 is available ex-works with a data logger, with standardised sensors and sensor positions, as well as a built-in cable harness. Via a CAN interface, important engine parameters such as exhaust gas temperature, oil pressure/temperature, mixture and coolant temperature, as well as the charge pressure, can be retrieved and provided for the system controls with minimum effort.