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Problem 5: 1
| Calculate the ideal air standard cycle efficiency based on the Otto cycle for a gas engine with a cylinder bore of 50 mm, a stroke of 75 mm and a clearance volume of 21.3 cm3. |
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Problem 9-79
| An idealized air-standard diesel cycle has a compression ratio of 15. The energy input is idealized as a heat transfer of 700 Btu/lbm. The inlet conditions are 70 oF at 1 atm. Find the pressure and temperature at the end of each process in the cycle and determine the cycle efficiency. |
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Problem 5: 3
| An oil engine takes in air at 1.01 bar, 20 oC and the maximum cycle pressure is 69 bar. The compressor ratio is 18:1. Calculate the air standard thermal efficiency based on the dual-combustion cycle. Assume that the heat added at constant volume is equal to the heat added at constant pressure. |
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