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An engine is required to take a load of 50 kW at 4000 rev/m. It may be assumed to have a mechanical efficiency of 84% and a volumetric efficiency of 87%, and it will produce an IMEP of 1100 kPa on an air/fuel ratio of 15 to 1. The calorific value of the fuel is 42 MJ/kg. Calculate the displacement of the required engine and its brake thermal efficiency

The calorific value of the fuel is 42 MJ/kg. and it is four stroke engine so the value of the k is considered to be 0.5.

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