GATE ME 2015 Set 1 — Question 21
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Thermodynamics → IC Engines → Mean Effective Pressure & Efficiency
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Question
Air enters a diesel engine with a density of . The compression ratio is 21. At steady state, the air intake is and the net work output is . The mean effective pressure (in kPa) is ___________
Correct answer
525 to 525
Solution
Mean Effective Pressure (MEP) is defined as:where is the swept volume.
1.Calculate the volume flow rate at intake (state 1):
2.Relate swept volume to intake volume using the compression ratio :
3.Calculate the swept volume flow rate:
4.Calculate MEP:
Therefore, the mean effective pressure is .Continue learning with Success Tracker
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