Effect of Charge Air Temperature on Specific Fuel Consumption in Intercooled Direct Injection Diesel Engines Used for Power Generation


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Abstract


This paper presents the results of a study carried out to determine the variations of Specific Fuel Consumption (SFC) and fuel efficiency in day time and night time operation of an intercooled direct injection diesel engine of 17MW used for electrical power generation. In the study pressure development curves for 18 cylinders were obtained and the Mean Indicated Pressure (MIP) and crank positions for the Peak Pressure, Kinetic Burning (KB), and Diffusive Burning (DB) points were analyzed. The results showed a reduction of 1.9% in SFC in the night time operation in which the charge air temperature was lower and relative humidity was higher than those of day time. The reasons for changes in SFC are explained with the changes in the in-cylinder pressure curves. Further, the fuel efficiency was found to be increased in the night time by 0.8%.
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Keywords


Specific Fuel Consumption; Diesel Engines; Mean Indicated Pressure

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