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The volume ratios of compression and expansion for a diesel engine as measured from an indicator diagram are 16 and 8 respectively. The pressure and temperature at the beginning of the compression are 1 bar and 28°C. Assuming an ideal engine, determine the mean effective pressure, the ratio of maximum pressure to mean effective pressure and cycle efficiency. Also find the fuel consumption per kWh if the indicated thermal efficiency is 0.5 of ideal efficiency, mechanical efficiency is 0.8 and the calorific value of oil 42000 kJ/kg. Assume for air : cp = 1.005 kJ/kg K ; cv = 0.718 kJ/kg K, ã = 1.4. Please also draw the PV diagram.

The volume ratios of compression and expansion for a diesel engine as measured from an indicator diagram are 16 and 8 respectively. The pressure and temperature at the beginning of the compression are 1 bar and 28°C. Assuming an ideal engine, determine the mean effective pressure, the ratio of maximum pressure to mean effective pressure and cycle efficiency. Also find the fuel consumption per kWh if the indicated thermal efficiency is 0.5 of ideal efficiency, mechanical efficiency is 0.8 and the calorific value of oil 42000 kJ/kg. Assume for air : cp = 1.005 kJ/kg K ; cv = 0.718 kJ/kg K, ã = 1.4. Please also draw the PV diagram.

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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The volume ratios of compression and expansion for a diesel engine as

measured from an indicator diagram are 16 and 8 respectively. The pressure and temperature

at the beginning of the compression are 1 bar and 28°C.

Assuming an ideal engine, determine the mean effective pressure, the ratio of maximum

pressure to mean effective pressure and cycle efficiency.

Also find the fuel consumption per kWh if the indicated thermal efficiency is 0.5 of ideal

efficiency, mechanical efficiency is 0.8 and the calorific value of oil 42000 kJ/kg.

Assume for air : cp = 1.005 kJ/kg K ; cv = 0.718 kJ/kg K, ã = 1.4.

Please also draw the PV diagram.

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