Five kilogram per second of steam at 6 MPa and 500oC expand to 1.0 MPa in a polytropic process where pV1.26 = C. Find (a) x2 and t2,  ΔS, ΔU and ΔH, (b) W for nonflow, and (c) W for steady flow if ΔK = - 40 kJ/s. (d) Find Q from steady flow and also from nonflow energy equation.

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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.