Q2: A compression-ignition engine has a compression ratio of 15, which can be analysed based on the diesel air-standard cycle. The pressure and temperature at the beginning of compression are 1 bar and 18 °C, and the air-fuel ratio is 28:1; and the calorific value of the fuel is 44 MJ/kg. Find the maximum pressure (kPa) and temperature (K); the cut-off ratio; the thermal efficiency (%); the work done (kJ/kg) and the imep (kPa) of the engine. Assume: Cp = 1.01 kJ/kg.K ; R= 0.287 kJ/kg.K %3D and k= 1,4.

Q2: A compression-ignition engine has a compression ratio of 15, which can be analysed based on the diesel air-standard cycle. The pressure and temperature at the beginning of compression are 1 bar and 18 °C, and the air-fuel ratio is 28:1; and the calorific value of the fuel is 44 MJ/kg. Find the maximum pressure (kPa) and temperature (K); the cut-off ratio; the thermal efficiency (%); the work done (kJ/kg) and the imep (kPa) of the engine. Assume: Cp = 1.01 kJ/kg.K ; R= 0.287 kJ/kg.K %3D and k= 1,4.

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

Q2: A compression-ignition engine has a compression ratio of 15, which can be
analysed based on the diesel air-standard cycle. The pressure and temperature at the
beginning of compression are 1 bar and 18 °C, and the air-fuel ratio is 28:1; and the
calorific value of the fuel is 44 MJ/kg. Find the maximum pressure (kPa) and
temperature (K); the cut-off ratio; the thermal efficiency (%); the work done (kJ/kg)
and the imep (kPa) of the engine. Assume: Cp = 1.01 kJ/kg.K ; R= 0.287 kJ/kg.K
and k= 1.4.

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