A control mass system undergoes a three-process power cycle with air as the working fluid. Air at initial condition of P=0.1 MPa and T=20 °C is compressed isothermally to 0.6 MPa. It is heated at constant pressure and finally it is expanded in a polytropic with Pv=constant, where k=cp/cv (cp=1.005kJ/kg.K and cv= 0.718KJ/kg.K) process back to its initial state. a. Calculate pressure, temperature and specific volume at the 3 states b. Determine the heat transfer per unit mass q, and work per unit mass, w for each process c. Draw these process cycles on P-v diagram, label the points

Refrigeration and Air Conditioning Technology (MindTap Course List)
8th Edition
ISBN:9781305578296
Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Chapter45: Domestic Refrigerators And Freezers
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2. A control mass system undergoes a three-process power cycle with air as the working
fluid. Air at initial condition of P=0.1 MPa and T=20 °C is compressed isothermally
to 0.6 MPa. It is heated at constant pressure and finally it is expanded in a polytropic
process with Pv*=constant, where k=cp/cv (cp=1.005KJ/kg.K and cv= 0.718KJ/kg.K)
back to its initial state.
a. Calculate pressure, temperature and specific volume at the 3 states
b. Determine the heat transfer per unit mass q, and work per unit mass, w for
each process
c. Draw these process cycles on P-v diagram, label the points
Transcribed Image Text:2. A control mass system undergoes a three-process power cycle with air as the working fluid. Air at initial condition of P=0.1 MPa and T=20 °C is compressed isothermally to 0.6 MPa. It is heated at constant pressure and finally it is expanded in a polytropic process with Pv*=constant, where k=cp/cv (cp=1.005KJ/kg.K and cv= 0.718KJ/kg.K) back to its initial state. a. Calculate pressure, temperature and specific volume at the 3 states b. Determine the heat transfer per unit mass q, and work per unit mass, w for each process c. Draw these process cycles on P-v diagram, label the points
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