Steam expands in a steam turbine steadily at a rate of 32,000 kg/h, that enters the turbine at 7 MPa and 600 oC (look to the Fig. 1); whereas, it leaves the turbine at 25 kPa as saturated vapor. If this turbine generates a power of 6.5 MW at the ambient conditions of T0=27 oC, then, a) Write the mass balance of the fluid entering and leaving this turbine. b) Obtain the energy balance to determine the heat loss of the steam turbine, c) Find the entropy generation using the entropy balance and determine the destroyed exergy using the generated entropy, d) Find the exergy destruction using the exergy balance , e) Find the maximum possible power output, f) Determine the second-law efficiency (ηII) of the steam turbine,

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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.