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An engine operates on the Otto cycle and has a compression ratio of 8. Fresh air enters the engine at 27°C and 100 kPa. The amount of heat addition is 700 kJ/kg. The amount of air mass in the cylinder is 0.01 kg. Determine the pressure and temperature at the end of the combustion, the pressure and temperature at the end of the expansion, MEP, efficiency and work output per kilogram of air. [ANSWERS: p=4441 kPa and T=1393°C (at the end of the combustion), p=241.6 kPa and T=452.1°C (at the end of the expansion), MEP=525.0 kPa, n=56.47% and Wnet-3.95 kJ]

An engine operates on the Otto cycle and has a compression ratio of 8. Fresh air enters the engine at 27°C and 100 kPa. The amount of heat addition is 700 kJ/kg. The amount of air mass in the cylinder is 0.01 kg. Determine the pressure and temperature at the end of the combustion, the pressure and temperature at the end of the expansion, MEP, efficiency and work output per kilogram of air. [ANSWERS: p=4441 kPa and T=1393°C (at the end of the combustion), p=241.6 kPa and T=452.1°C (at the end of the expansion), MEP=525.0 kPa, n=56.47% and Wnet-3.95 kJ]

Elements Of Electromagnetics
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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An engine operates on the Otto cycle and has a compression ratio of 8. Fresh air enters the engine at 27°C and 100 kPa. The amount of heat addition is 700 kJ/kg. The amount of air mass in the cylinder is 0.01 kg. Determine the pressure and temperature at the end of the combustion, the pressure and temperature at the end of the expansion, MEP, efficiency and work output per kilogram of air. [ANSWERS: p=4441 kPa and T=1393°C (at the end of the combustion), p=241.6 kPa and T=452.1°C (at the end of the expansion), MEP=525.0 kPa, n=56.47% and Wnet-3.95 kJ]
Transcribed Image Text:An engine operates on the Otto cycle and has a compression ratio of 8. Fresh air enters the engine at 27°C and 100 kPa. The amount of heat addition is 700 kJ/kg. The amount of air mass in the cylinder is 0.01 kg. Determine the pressure and temperature at the end of the combustion, the pressure and temperature at the end of the expansion, MEP, efficiency and work output per kilogram of air. [ANSWERS: p=4441 kPa and T=1393°C (at the end of the combustion), p=241.6 kPa and T=452.1°C (at the end of the expansion), MEP=525.0 kPa, n=56.47% and Wnet-3.95 kJ]
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