A six cylinder 1.8 litre spark ignition engine is required to develop an output of 75 kW at 3500 rev/min. The compression ratio of the engine is 10:1. The operating cycle of the engine follows the ideal Otto cycle, the pressure and temperature before isentropic compression is 1 bar and 15°C respectively, determine; a) Efficiency based on the Otto cycle b) Required rate of heat addition c) Mean effective pressure d) Maximum temperature of the cycle Note: Otto cycle efficiency 7 = 1. 1 py-1 Sup tos fius noveour aumenysor Assume cv =0.718 kJ/(kg K), y = 1.4, R = 0.287 kJ/ (kg K)
A six cylinder 1.8 litre spark ignition engine is required to develop an output of 75 kW at 3500 rev/min. The compression ratio of the engine is 10:1. The operating cycle of the engine follows the ideal Otto cycle, the pressure and temperature before isentropic compression is 1 bar and 15°C respectively, determine; a) Efficiency based on the Otto cycle b) Required rate of heat addition c) Mean effective pressure d) Maximum temperature of the cycle Note: Otto cycle efficiency 7 = 1. 1 py-1 Sup tos fius noveour aumenysor Assume cv =0.718 kJ/(kg K), y = 1.4, R = 0.287 kJ/ (kg K)
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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Transcribed Image Text:A six cylinder 1.8 litre spark ignition engine is required to develop an output of 75
kW at 3500 rev/min. The compression ratio of the engine is 10:1. The operating
cycle of the engine follows the ideal Otto cycle, the pressure and temperature
before isentropic compression is 1 bar and 15°C respectively, determine;
a) Efficiency based on the Otto cycle
b) Required rate of heat addition
c) Mean effective pressure
d) Maximum temperature of the cycle
Note:phs Otto cycle efficiency 7 = 1
1
۲۷-۱
Assume cv =0.718 kJ/(kg K), y = 1.4, R = 0.287 kJ/ (kg K)
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