Image Study Diesel Power Plants - MAN Diesel & Turbo

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Image Study Plant Efficiency Lastly, a plant’s efficiency ratio provides another important indicator of its cost effectiveness. The electrical efficiency is the ratio of the generator output measured in MWe and the fuel input measured in MWth. If the net efficiency of a plant needs to be determined, Power Plant Efficiencies Plant Type Net Plant Efficiency (%) Oil-fired Plants Two-stroke Diesel engine 150 MW HFO 49 Four-stroke Diesel engine 160 MW HFO 43 Four-stroke Diesel engine 160 MW LFO 41 Four-stroke Diesel engine 160 MW LBF 41 Gas-fired Plants Aero derivative gas turbine 160 MW 38 Gas turbine combined cycle 330 MW 49 Industrial gas turbine 110 MW 31 Fossil Steam Plans Coal 500 MW 40 Nuclear Plants Nuclear 1500 MW 35 Table 5: Power Plant Efficiencies (under ISO conditions Mainly using the same examples as in the section on lifecycle costs, table 5 compares the efficiency ratios of different power plant types. The table does of course not provide a comprehensive list of all variations within a given power plant category, but provides a good selection of real life examples to better illustrate the topic. the plant’s auxiliary power consumption would have to be subtracted from the generator output first. Also to be considered are the at- site conditions that can affect a plant’s electrical output. Those conditions can be ambient temperature, altitude, part load operation mode, system deterioration, etc. Assumptions • Please note that calculations are assuming southern European conditions at the plant site (30°C ambient temperature, site at 100 m above sea level). • The values of the listed engines and gas turbines are based on the values of the products of two large international manufacturers in that field. The findings above show that the efficiency values of engine-based plants range between 40-47%. While the values of plants based aero derivative gas turbines range between 35-40%, plants based on industrial gas turbines come in between 25-35%. Comparing plants based on Diesel and gas engines shows that they have roughly the same efficiency values at the same sizes. The evaluated coal and nuclear power plants came in at 40% and 35%, respectively. The different results show that engine-based solutions have the highest efficiency ratios of 30
Image Study the alternatives compared. Please note that this assessment does not include co- generation or combined cycle power plants. Examining the different power plant types from an electrical net efficiency perspective showed that engine-based technology is highly competitive. From that point of view, sub- hypothesis 3 can be regarded a valid state- ment. 31
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Image Study Diesel Power Plants - MAN Diesel & Turbo

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