A piston-cylinder assembly contains 5 kg of air modeled as an ideal gas with a constant specific heat ratio, k = 1.4. R for air is 0.287 kJ/kg*K. The air undergoes a power cycle Process 1-2: Isothermal expansion at 600 K from Pi = 1 MPa to p2 = 0.7 MPa. consisting of four processes in series: Process 2-3: Polytropic expansion (n = k) to p3 = 0.5 MPa. Process 3-4: Constant pressure compression to V4 = V1. Process 4-1: Constant volume heating to pi = 1 MPa Part a.) Draw the p-v diagram and label all pressures and volumes with units. Part b.) Fill in as much of the charts below as you can. Process Q (net) kJ W (net) kJ AU KJ 1-2 2-3 3-4 4-1 Cycle (Total) State T (K) P (kPa) V(m³) UlkJ) 1 2 3 4 Part c.) Determine the thermal efficiency for the cycle.

A piston-cylinder assembly contains 5 kg of air modeled as an ideal gas with a constant specific heat ratio, k = 1.4. R for air is 0.287 kJ/kg*K. The air undergoes a power cycle Process 1-2: Isothermal expansion at 600 K from Pi = 1 MPa to p2 = 0.7 MPa. consisting of four processes in series: Process 2-3: Polytropic expansion (n = k) to p3 = 0.5 MPa. Process 3-4: Constant pressure compression to V4 = V1. Process 4-1: Constant volume heating to pi = 1 MPa Part a.) Draw the p-v diagram and label all pressures and volumes with units. Part b.) Fill in as much of the charts below as you can. Process Q (net) kJ W (net) kJ AU KJ 1-2 2-3 3-4 4-1 Cycle (Total) State T (K) P (kPa) V(m³) UlkJ) 1 2 3 4 Part c.) Determine the thermal efficiency for the cycle.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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Concept explainers

Work and Heat Transfer

It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. There are various mechanisms by which, transfer of heat takes place i.e. thermal conduction, convection, radiation or by change of phase. All these mechanisms have their own specific features which sometimes occur simultaneously within the same system.

Question

A piston-cylinder assembly contains 5 kg of air modeled as an ideal gas with a constant
specific heat ratio, k = 1.4. R for air is 0.287 kJ/kg*K. The air undergoes a power cycle
Process 1-2: Isothermal expansion at 600 K from Pi = 1 MPa to p2 = 0.7 MPa.
consisting of four processes in series:
Process 2-3: Polytropic expansion (n = k) to p3 = 0.5 MPa.
Process 3-4: Constant pressure compression to V4 = V1.
Process 4-1: Constant volume heating to pi = 1 MPa
Part a.) Draw the p-v diagram and label all pressures and volumes with units.
Part b.) Fill in as much of the charts below as you can.
Process
Q (net) kJ
W (net) kJ
AU KJ
1-2
2-3
3-4
4-1
Cycle (Total)
State
T (K)
P (kPa)
V(m³)
Ulk))
3
Part c.) Determine the thermal efficiency for the cycle.

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