Question

1. The pressure and temperature at the beginning of compression of an air-standard Diesel cycle are 95 kPa and 300 K , respectively. At the end of the heat addition, the pressure is 7.2 MPa and the temperature is 2150 K . Using cold air-standard basis with variable specific heats, Determine: a. the compression ratio. b. the cutoff ratio. c. the thermal efficiency of the cycle. d. the mean effective pressure, in kPa .

          1. The pressure and temperature at the beginning of compression of an air-standard Diesel cycle are 95 kPa and 300 K , respectively. At the end of the heat addition, the pressure is 7.2 MPa and the temperature is 2150 K . Using cold air-standard basis with variable specific heats, Determine:
a. the compression ratio.
b. the cutoff ratio.
c. the thermal efficiency of the cycle.
d. the mean effective pressure, in kPa .

1. The pressure and temperature at the beginning of compression of an air-standard Diesel cycle are 95 kPa and 300 K , respectively. At the end of the heat addition, the pressure is 7.2 MPa and the temperature is 2150 K . Using cold air-standard basis with variable specific heats, Determine:
a. the compression ratio.
b. the cutoff ratio.
c. the thermal efficiency of the cycle.
d. the mean effective pressure, in kPa .

Added by Karen F.

Fundamentals of Engineering Thermodynamics SI VERSION

Michael J. Moran, Howard N. Shapiro 5th Edition

Chapter 9

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1. The pressure and temperature at the beginning of compression of an air-standard Diesel cycle are 95 kPa and 300 K , respectively. At the end of the heat addition, the pressure is 7.2 MPa and the temperature is 2150 K . Using cold air-standard basis with variable specific heats, Determine: a. the compression ratio. b. the cutoff ratio. c. the thermal efficiency of the cycle. d. the mean effective pressure, in kPa .