In a C.I. engine working on the dual combustion cycle the compression ratiois 12.5:1. Air at 101.3kPa and 35°C is compressed adiabatically.Fuel is then added until the pressure reaches 4000kPa, then at constantpressure to a temperature of 1425°C.After adiabatic expansion to the initial volume exhaust takes place.Calculate:(a). work done/kg air(b). thermal efficiency

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Answered: In a C.I. engine working on the dual…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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At the beginning of compression, Otto cycle works on 0.2 lb/s of air at 14 psia and 130°F. The temperature at the completion of combustion is 4500°R, the compression ratio is 5.5, and the hot- air standard is k = 1.3. a. Find V1 , P2 , T2 , P3 , V3 , T4 b. Compute the heat added (QA), Qin W out heat rejected (QR), work (W) and the cycle efficiency (e). T W in Qout 1 S 3.
A 4 cylinder, 4 liter compcompression-ignition engine operates on the air standard dual cycle. It uses light duel fuel at air fluid ratio of 18. The compression ratio of the engine is 16:1 and cylinder bore diameter is 10cm. At the start of the compression state, conditions in the cylinders are 60°C and 100kPa with a 2% exhaust residual. It can be assumed that half of the heat input from combustion is added at constant volume and half at constant pressure. Calculate: 1. Temperature and pressure at each state of the cycle. 2. Indicated thermal efficiency 3. Exhaust temperature 4. Air temperature in intake manifold 5. Engine volumetric deficiency
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The pressure and temperature at the beginning of compression of an air standard diesel cycle are 80Kpa and 300K. At the end of the heat addition the pressure is 6821Kpa and temperature 2150K. Caluclate 1. Compression ratio 2 cuttoff ratio 3. Thermal Efficiency 4.Mean Effective Pressure

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