Increasing Efficiency of the Floating Electricity Power Generation with Variable Speed Reciprocating Engines

The problem of the cost efficient electricity generation on the floating power plants on the base of the oil and gas fuels. Software package developed at the CEAS Engine calculations department of MAN B&W was exercised for engine's parameters estimation. The internal combustion engine model provides the relationship between the set of boundary parameters and the set of design parameters, identifies working fluids and energy carriers: air, exhaust gases, coolant and fuel. High efficiency of floating facility is reaching due to extremely low specific gas fuel consumption of the main engines. The next step is the usage variable speed diesels for electricity generation into wide load modes. It allows increasing engine's fuel efficiency due to operation at rational modes at reducing power. This way needs special electrical and mechanical equipment. Efficient is solution with an eltctronical power converter connected to the diesel-driven generator. Instance, MAN B&W marine diesel engine 12G95ME-C10.6-LPSCR has the following main indexes: specified maximum continuous rating 82.4 MW and specific fuel oil consumption in specified mode 161.5 g/kWh. The main indexes of this engine and facilities on its base in standard ISO, tropical and specified ambient conditions were determined. Low-grade heat sources can be converted into electricity production and increased one engine power up to 95.2 MW. In this case specific fuel oil consumption is decreasing to 141 g/kWh or 13%, approximately.