oper air-standard Otto cycle are 60°C and 98 kPa. The engine has a compression ratio and uses gasoline with AF = 15.5. Combustion efficiency is 96%, and it can be as that there is no exhaust residual. Heating value of the fuel is about 44MJ/kg. Calculate: (a) Temperature at all states in the cycle. [°C] (b) Pressure at all states in the cycle. [kpa] (c) Specific work done during power stroke. [kJ/kg] (d) Heat added during combustion. [kJ/kg] (e) Net specific work done. [kJ/kg] 104

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answer d, e, and f only
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1. Cylinder conditions at the start of compression in an SI engine operating at WOT on an
air-standard Otto cycle are 60°C and 98 kPa. The engine has a compression ratio of 9.5:1
and uses gasoline with AF = 15.5. Combustion efficiency is 96%, and it can be assumed
that there is no exhaust residual. Heating value of the fuel is about 44MJ/kg.
Calculate: (a) Temperature at all states in the cycle. [°C]
(b) Pressure at all states in the cycle. [kpa]
(c) Specific work done during power stroke. [kJ/kg]
(d) Heat added during combustion. [kJ/kg]
(e) Net specific work done. [kJ/kg]
(f) Indicated thermal efficiency. [%]
Transcribed Image Text:1. Cylinder conditions at the start of compression in an SI engine operating at WOT on an air-standard Otto cycle are 60°C and 98 kPa. The engine has a compression ratio of 9.5:1 and uses gasoline with AF = 15.5. Combustion efficiency is 96%, and it can be assumed that there is no exhaust residual. Heating value of the fuel is about 44MJ/kg. Calculate: (a) Temperature at all states in the cycle. [°C] (b) Pressure at all states in the cycle. [kpa] (c) Specific work done during power stroke. [kJ/kg] (d) Heat added during combustion. [kJ/kg] (e) Net specific work done. [kJ/kg] (f) Indicated thermal efficiency. [%]
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