1. When working on the Otto cycle with air as the working fluid, an engine has an air standard efficiency of 54.5% and rejects heat at the rate of 520 KJ/kg of air used. The engine has a single cylinder with a bore of 72 mm and a stroke of 85 mm. The pressure and temperature at the beginning of compression are 0.98 bar and 660C respectively.Determinea. The compression ratio of the engine.b. The net work done per kilogram of air.c. The pressure and temperature at the end of compression.d. The maximum pressure and temperature in the cycle.e. The mean effective pressure. 1. When working on the Otto cycle with air as the working fluid, an engine has an airstandard efficiency of 54.5% and rejects heat at the rate of 520 KJ/kg of air used. Theengine has a single cylinder with a bore of 72 mm and a stroke of 85 mm. The pressureand temperature at the beginning of compression are 0.98 bar and 66°C respectively.Determinea. The compression ratio of the engine.b. The net work done per kilogram of air.c. The pressure and temperature at the end of compression.d. The maximum pressure and temperature in the cycle.e. The mean effective pressure.

Given, η=54.5%Q2=520 kJ/kgd=72 mm=0.072 mL=85 mm=0.085 mP1=0.98 barT1=66 C=339 K

Answered: 1. When working on the Otto cycle with…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

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1. When working on the Otto cycle with air as the working fluid, an engine has an air standard efficiency of 54.5% and rejects heat at the rate of 520 KJ/kg of air used. The engine has a single cylinder with a bore of 72 mm and a stroke of 85 mm. The pressure and temperature at the beginning of compression are 0.98 bar and 660C respectively.

Determine

a. The compression ratio of the engine.

b. The net work done per kilogram of air.

c. The pressure and temperature at the end of compression.

d. The maximum pressure and temperature in the cycle.

e. The mean effective pressure.

1. When working on the Otto cycle with air as the working fluid, an engine has an air
standard efficiency of 54.5% and rejects heat at the rate of 520 KJ/kg of air used. The
engine has a single cylinder with a bore of 72 mm and a stroke of 85 mm. The pressure
and temperature at the beginning of compression are 0.98 bar and 66°C respectively.
Determine
a. The compression ratio of the engine.
b. The net work done per kilogram of air.
c. The pressure and temperature at the end of compression.
d. The maximum pressure and temperature in the cycle.
e. The mean effective pressure.

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