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20 February, 19:55

Saturated steam coming off the turbine of a steam power plant at 30 °C condenses on the outside of a 3-cm-outer-diameter, 35-m-long pipe at a rate of 45 kg/h. Determine the rate of heat transfer from the steam to the cooling water flowing through the pipe.

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  1. 20 February, 23:22
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    The answer 30.07J/sec

    Explanation:

    GIVEN dа ta:

    temperature of steam = 40 degree celcius

    mass flow rate = 63 kg/h

    from saturated water tables,

    from temperature 40 °, enthalpy of evaporation value is 2406 kj/kg

    rate of heat transfer (Q) can be determine by using following relation

    putting all value to get Q value

    Q = 45 * 2406

    Q = 108270 kJ/h

    Q = 30.07 kJ/sec
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