The working gas of a thermodynamic cycle is air. The gas originally starts at 100kPa, 1m³ and 27°C First, the pressure of the gas is doubled keeping the volume fixed. ● Second, the volume of the gas is doubled at constant pressure. Third, the gas undergoes an adiabatic expansion. ● Fourth, the gas undergoes an isothermal contraction back to its original state a) Make a table of the pressure, volume, and temperature at the start of each process. b) Make a table of the change in internal energy, heat flow, work done, change in enthalpy and change in entropy during each leg of the cycle. ● c) Draw P-v and T-s diagrams, indicating P, V & T at the start of each process & AU, Q, W, AH & AS for each leg. d) Calculate the thermal efficiency of the cycle.

The working gas of a thermodynamic cycle is air. The gas originally starts at 100kPa, 1m³ and 27°C First, the pressure of the gas is doubled keeping the volume fixed. ● Second, the volume of the gas is doubled at constant pressure. Third, the gas undergoes an adiabatic expansion. ● Fourth, the gas undergoes an isothermal contraction back to its original state a) Make a table of the pressure, volume, and temperature at the start of each process. b) Make a table of the change in internal energy, heat flow, work done, change in enthalpy and change in entropy during each leg of the cycle. ● c) Draw P-v and T-s diagrams, indicating P, V & T at the start of each process & AU, Q, W, AH & AS for each leg. d) Calculate the thermal efficiency of 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

The working gas of a thermodynamic cycle is air. The gas originally starts at 100kPa, 1m³ and 27°C
First, the pressure of the gas is doubled keeping the volume fixed.
Second, the volume of the gas is doubled at constant pressure.
Third, the gas undergoes an adiabatic expansion.
Fourth, the gas undergoes an isothermal contraction back to its original state
a) Make a table of the pressure, volume, and temperature at the start of each process.
b) Make a table of the change in internal energy, heat flow, work done, change in enthalpy and change in entropy during
each leg of the cycle.
●
●
c) Draw P-v and T-s diagrams, indicating P, V & T at the start of each process & AU, Q, W, AH & AS for each leg.
d) Calculate the thermal efficiency of the cycle.

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