A test on a single cylinder, four stroke oil engine having a bore of 15cm and stroke 30 cm gave the following results: speed 300 rpm, brake torque 200 Nm, indicated mean effective pressure 7 bar, fuel consumption 2.4 kg/h, air fuel ratio 22, room temperature 20°C and pressure at 1 bar. The fuel has a calorific value of 42 MJ/kg and contains of 15% by weight of hydrogen. Calculate: i. indicated thermal efficiency ii. volumetric efficiency

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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A test on a single cylinder, four stroke oil engine having a bore of 15cm and
stroke 30 cm gave the following results: speed 300 rpm, brake torque 200 Nm,
indicated mean effective pressure 7 bar, fuel consumption 2.4 kg/h, air fuel ratio
22, room temperature 20°C and pressure at 1 bar. The fuel has a calorific value of
42 MJ/kg and contains of 15% by weight of hydrogen. Calculate:
i. indicated thermal efficiency
ii. volumetric efficiency
Transcribed Image Text:A test on a single cylinder, four stroke oil engine having a bore of 15cm and stroke 30 cm gave the following results: speed 300 rpm, brake torque 200 Nm, indicated mean effective pressure 7 bar, fuel consumption 2.4 kg/h, air fuel ratio 22, room temperature 20°C and pressure at 1 bar. The fuel has a calorific value of 42 MJ/kg and contains of 15% by weight of hydrogen. Calculate: i. indicated thermal efficiency ii. volumetric efficiency
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