The exhaust steam from a power station turbine is condensed in a condenser operating at 0.0738 bar(abs). the surface of the heat transfer surface is held at 20°c. what percentage change does the inclusion of the sensible heat correction term make to the estimated heat transfer condensing film coefficient?

Percentage change 5.75 %.

Explanation:Given ;

Given

 Pressure of condenser =0.0738 bar

Surface temperature=20°C

Now from steam table

Properties of steam at 0.0738 bar  

Saturation temperature corresponding to saturation pressure =40°C      

So Δh=2573.5-167.5=2406 KJ/kg

Enthalpy of condensation=2406 KJ/kg

So total heat=Sensible heat of liquid+Enthalpy of condensation

Total heat =4.2(40-20)+2406

Total heat=2,544 KJ/kg

Now film coefficient before inclusion of sensible heat

Now film coefficient after inclusion of sensible heat

                   =5.75 %

So Percentage change 5.75 %.

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