MAN Completes First Dual-Fuel Retrofit
MAN Diesel announced that it recently completed the first retrofit of its advanced dual-fuel technology on an existing heavy fuel engine in a stationary application. Executed by MAN Diesel’s rapidly expanding PrimeServ after-sales organisation, a 12-cylinder, Vee-configuration 48/60 engine operating in an industrial cogeneration plant in Portugal was converted to full 51/60DF specification. In over 11 years of operation the 48/60 engine had logged over 88 000 hours in grid parallel baseload mode at the cogeneration plant, where its thermal output is used to raise process steam for the textile works.
“We recently handed over the converted 51/60DF engine to operator Têxtil Manuel Gonçalves, Sociedade de Producao de Electricidade e Calor S.A. (TMG SPE) which runs an adjacent textile works in the town of Vila Nova de Famalicão,” notes Manfred Gallersdörfer, leader of the 51/60DF retrofit team at PrimeServ, which handles all engine and turbocharger upgrades.
In gaseous fuel mode, the gas engine readily achieves emissions of oxides of nitrogen (NOx) of 500 mg /mn3 at 5% O2 and hence complies with emissions legislation based on Germany’s TA Luft clean air code and the World Bank Pollution Prevention and Abatement Handbook.
In the TMG SPE application the output of the retrofitted 51/60DF is adapted to a local gas supply with a nominal methane number of 75, the thermal-versus-electrical energy requirements of the specific 50Hz cogeneration application and ambient air conditions. It equates to 950 kW/cyl under ISO conditions.
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