An Otto cycle with a compression ratio of 8 begins its compression at 94 kPa, and 10°C. The maximum temperature and minimum volume within the cycle is 900°C and 150 cm3 , respectively. Utilizing air-standard assumptions, determine the (a) mean effective pressure, in kPa. Consider the cycle as a model of the processes in each cylinder of a spark-ignition engine. Determine the (b) net power output, in kW, if the engine has four cylinders and the cycle is repeated 1200 times per minute in each cylinder. Show the T-s and P-? diagrams when solving. Note that the specific heats are NOT constant Use g = 9.81 m/s2 or 32.2 ft/s2 , T(K)=T(°C)+273 and T(R)=T(°F)+460, where applicable
An Otto cycle with a compression ratio of 8 begins its compression at 94 kPa, and 10°C. The maximum temperature and minimum volume within the cycle is 900°C and 150 cm3 , respectively. Utilizing air-standard assumptions, determine the (a) mean effective pressure, in kPa. Consider the cycle as a model of the processes in each cylinder of a spark-ignition engine. Determine the (b) net power output, in kW, if the engine has four cylinders and the cycle is repeated 1200 times per minute in each cylinder. Show the T-s and P-? diagrams when solving. Note that the specific heats are NOT constant Use g = 9.81 m/s2 or 32.2 ft/s2 , T(K)=T(°C)+273 and T(R)=T(°F)+460, where applicable
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 Otto cycle with a compression ratio of 8 begins its compression at 94 kPa, and 10°C. The maximum temperature and minimum volume within the cycle is 900°C and 150 cm3 , respectively. Utilizing air-standard assumptions, determine the
(a) mean effective pressure, in kPa. Consider the cycle as a model of the processes in each cylinder of a spark-ignition engine. Determine the (b) net power output, in kW, if the engine has four cylinders and the cycle is repeated 1200 times per minute in each cylinder.
Show the T-s and P-? diagrams when solving.
Note that the specific heats are NOT constant
Use g = 9.81 m/s2 or 32.2 ft/s2 , T(K)=T(°C)+273 and T(R)=T(°F)+460, where applicable
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