A piston cylinder device has a volume of 0.04 m3 and initially contains air at 293 K and 1 bar.  This device is used to perform a cycle in which the gas is heated at a constant volume until the temperature reaches 1000 K.  The air is allowed to expand following an isothermal process until the volume is 3.5 times the original volume.  It is then cooled at a constant volume process.  The completion of the cycle is a PV1.36 = constant process back to the original state.  For the air, the specific heat is cv =0.79 kJ/(Kg K) = constant and its gas constant is RG=0.287 kJ/(Kg K).         Calculate the net work produced by this cycle, the required heat input to the cycle and its thermal efficiency. How much heat is removed from the system during the cycle? Could the heat removed from this cycle be used to heat or partial heat the water that is at an initial temperature of 298 K?  Would you recommend designing a heat recovery for this purpose?

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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.