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A super charged six-cylinder four-stroke cycle Diesel engine of 10.48 cm bore and 12.7cm stroke has a compression ratio of 15. When it is tested on a dynamometer with a 53.34 cm arm at 2500 rpm the scale reads 81.65 kg, 2.86 kg of fuel of 45,822 kJ/ kg heating value are burned during a 6 minute test, and air metered to the cylinders at the rate of 0.182 kg/s. Find the brake thermal efficiency.
A super charged six-cylinder four-stroke cycle Diesel engine of 10.48 cm bore and 12.7cm stroke has a compression ratio of 15. When it is tested on a dynamometer with a 53.34 cm arm at 2500 rpm the scale reads 81.65 kg, 2.86 kg of fuel of 45,822 kJ/ kg heating value are burned during a 6 minute test, and air metered to the cylinders at the rate of 0.182 kg/s. Find the brake thermal efficiency.