An insulated pipe of inside diameter 50 mm contains steam of specific enthalpy 2·794 MJ/kg and specific volume 0·0394 m3 /kg. The pipe then reduces to 25 mm diameter, and the specific enthalpy is then 2·786 MJ /kg and the specific volume is 0·1043 m/kg. Determine the mass flow rate of the steam and its velocity in both sections of the pipe

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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.