The compression ratio for a six cylinder, 4-stroke, Diesel engine is 15:1. The bore is 130 mm and stroke 150 mm. The indicated thermal efficiency is 0.41 and the A/F is 18.5. The lower heating value of the fuel is 44 MJ/kg. The volumetric eff. for engine is 0.9. The mechanical friction power for engine is equivalent to 12.5% of the indicated power. The engine operates at 900 rpm and the atmospheric pressure and temperature are 100 kPa absolute and 25 °C respectively. Take (k=1.4, specific heat at constant pressure = 1 kJ/kgK) Determine: a)Brake power for the engine. b) Brake specific fuel consumption. c) Brake thermal efficiency

The compression ratio for a six cylinder, 4-stroke, Diesel engine is 15:1. The bore is 130 mm and stroke 150 mm. The indicated thermal efficiency is 0.41 and the A/F is 18.5. The lower heating value of the fuel is 44 MJ/kg. The volumetric eff. for engine is 0.9. The mechanical friction power for engine is equivalent to 12.5% of the indicated power. The engine operates at 900 rpm and the atmospheric pressure and temperature are 100 kPa absolute and 25 °C respectively. Take (k=1.4, specific heat at constant pressure = 1 kJ/kgK) Determine: a)Brake power for the engine. b) Brake specific fuel consumption. c) Brake thermal efficiency

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

IC engines

The term "engine" indicates a mechanical device/machine used to convert input energy to a specific mechanical output. The input energy may be in the form of chemical energy, thermal energy, or so on and mechanical output is in the form of mechanical energy (work done). Generally, the engines classify into two groups which are internal combustion type and external combustion type, and further, these two types can be classified into two types that are reciprocating and rotary engines.

Question

The compression ratio for a six cylinder, 4-stroke, Diesel engine is 15:1. The bore is 130 mm and
stroke 150 mm. The indicated thermal efficiency is 0.41 and the A/F is 18.5. The lower heating value
of the fuel is 44 MJ/kg. The volumetric eff. for engine is 0.9. The mechanical friction power for
engine is equivalent to 12.5% of the indicated power. The engine operates at 900 rpm and the
atmospheric pressure and temperature are 100 kPa absolute and 25 °C respectively. Take (k=1.4,
specific heat at constant pressure = 1 kJ/kgK) Determine:
a)Brake power for the engine.
b) Brake specific fuel consumption.
c) Brake thermal efficiency

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