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.

Question

Tomas Diaz

Engineering

26 December, 13:13

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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Answers (1)

Know the Answer?

Alonso Rose · Answer 1

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