A piston-cylinder device contains 5kg of steam at 100 degrees C with a quality of 40%. The steam undergoes the following processes: 1-2 Heat is transferred to the steam in a reversible manner while the temperature is held constant until the steam becomes a saturated vapor. 2-3 The steam expands in an adiabatic, reversible process until the pressure is 40 kPa. Sketch these processes with repect to the saturation lines on a single T-s diagram. Determine the amount of heat transferred to the steam in process 1-2. Determine the work done by the steam in proccess 2-3.

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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.