A steam power plant operates essentially under steady state conditions in which steam is at a temperature of 250 C and pressure is 0.3 MPa. The steam is cooled at constant volume. (a) Find at what temperature, the steam becomes a saturated vapor. (b) What will be its quality at 80 •C? (c) What is the heat transfer per kg of steam by cooling it from 250 •C to 80 •C?

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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.