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Find the brake thermal efficiency of a diesel engine having a Mass flow rate of fuel 10 kg / hr and brake power 50 Hp.

Find the brake thermal efficiency of a diesel engine having a Mass flow rate of fuel 10 kg / hr and brake power 50 Hp. Correct Answer 29%

ηbth = B.P / rate of heat supply = B.P / Mf * Cv = 50 * 745.6 / 0.0027 * 45500 = 0.2949 = 29.49% Where B.P – brake power, ηbth – brake thermal efficiency, Cv of diesel – 45500 KJ / kg

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