9-33 An ideal Otto cycle has a compression ratio of 8. At the beginning of the compression process, air is at 95 kPa and 27°C, and 750 kJ/kg of heat is transferred to air dur- ing the constant-volume heat-addition process. Taking into account the variation of specific heats with temperature, determine (a) the pressure and temperature at the end of the heat-addition process, (b) the net work output, (c) the thermal efficiency, and (d) the mean effective pressure for the cycle. Answers: (a) 3898 kPa, 1539 K, (b) 392.4 kJ/kg. (c) 52.3 percent, (d) 495 kPa

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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9-33 An ideal Otto cycle has a compression ratio of 8. At
the beginning of the compression process, air is at 95 kPa
and 27°C, and 750 kJ/kg of heat is transferred to air dur-
ing the constant-volume heat-addition process. Taking into
account the variation of specific heats with temperature,
determine (a) the pressure and temperature at the end of
the heat-addition process, (b) the net work output, (c) the
thermal efficiency, and (d) the mean effective pressure for
the cycle. Answers: (a) 3898 kPa, 1539 K, (b) 392.4 kJ/kg.
(c) 52.3 percent, (d) 495 kPa
Transcribed Image Text:9-33 An ideal Otto cycle has a compression ratio of 8. At the beginning of the compression process, air is at 95 kPa and 27°C, and 750 kJ/kg of heat is transferred to air dur- ing the constant-volume heat-addition process. Taking into account the variation of specific heats with temperature, determine (a) the pressure and temperature at the end of the heat-addition process, (b) the net work output, (c) the thermal efficiency, and (d) the mean effective pressure for the cycle. Answers: (a) 3898 kPa, 1539 K, (b) 392.4 kJ/kg. (c) 52.3 percent, (d) 495 kPa
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