Q6: A single cylinder four-stroke diesel engine working on Dual combustion cycle has a compression ratio of (15:1). The engine draws in air at (1 bar), (27 °C) and the maximum pressure in the cylinder is limited to (55 bar). If the heat transfer at constant volume is twice that at constant pressure, determine (a) the constant volume pressure ratio (b) the cut-off ratio, and (c) the thermal efficiency of the cycle. Assume Cp=1.005 Kj/Kg.K, C=0.718Kj/Kg.K and y=1.4. Ans (a) 1.24 (b) 1.07 (c) 66%

Elements Of Electromagnetics
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Author:Sadiku, Matthew N. O.
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Q6: A single cylinder four-stroke diesel engine working on Dual combustion cycle
has a compression ratio of (15:1). The engine draws in air at (1 bar), (27 °C) and the
maximum pressure in the cylinder is limited to (55 bar). If the heat transfer at
constant volume is twice that at constant pressure, determine (a) the constant
volume pressure ratio (b) the cut-off ratio, and (c) the thermal efficiency of the cycle.
Assume Cp=1.005 Kj/Kg.K, C=0.718Kj/Kg.K and y=1.4. Ans (a) 1.24 (b) 1.07 (c) 66%
Transcribed Image Text:Q6: A single cylinder four-stroke diesel engine working on Dual combustion cycle has a compression ratio of (15:1). The engine draws in air at (1 bar), (27 °C) and the maximum pressure in the cylinder is limited to (55 bar). If the heat transfer at constant volume is twice that at constant pressure, determine (a) the constant volume pressure ratio (b) the cut-off ratio, and (c) the thermal efficiency of the cycle. Assume Cp=1.005 Kj/Kg.K, C=0.718Kj/Kg.K and y=1.4. Ans (a) 1.24 (b) 1.07 (c) 66%
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