Dual-Fuel Power For Gabon: Gabon government to receive four gen-sets, engine-related plant auxiliaries  by DJ Slater

MAN Diesel & Turbo and Telemenia, the Israeli power engineering company, have signed a contract for the supply of four generator sets and engine-related auxiliaries to the Gabon
government in Africa. The generator sets are powered by MAN Diesel & Turbo’s 18V 51/60DF engines, which are MAN’s first dualfuel engines in the region, said the company. The engines are available in a nine-cylinder, inline version as well as vee-configuration versions with 12, 14 and 18 cylinders.

The Gabonese government has ordered four generator sets driven by MAN Diesel & Turbo’s 51/60DF dual-fuel engines. The gen-sets are rated from 8.5 to 17.5 MW.

The engines come with a fourstroke cycle and a constant pressure turbocharging system. They are rated at 1 MW per cylinder for 60 Hz power generation and 975 kW for 50 Hz applications. These ratings give the generator sets a rating range from 8.5 to 17.5 MW. The total output of the four engines is about 70 MW.

Each engine features a 510 mm bore with a 600 mm stroke. Cooling is provided by a freshwater, singlestage cylinder cooling system and a two-stage charge-air cooler. The engines run on natural gas with a fuel-oil mode acting as a backup in case the gas supply is disrupted. The engine’s fuel flexibility allows it to switch between gas and liquid fuel at full-rated output, according to MAN Diesel & Turbo.

In the gas-fuel mode, an air-gas mixture gets ignited by injecting distillate diesel fuel. The liquid fuel micropilot amounts to 1% of the quantity of liquid fuel needed to obtain its fullrated output. The mixture is injected through a common rail system that allows a flexible setting of injection timing, duration a