b)

02000CH202052001

kinematic viscosity = 5.21 x 104 2/8, thermal conductivity = 0.0364 W/m K, Pr =
0.686, Specific heat = 1.021 kJ/kg K).
A grey surface is maintained at a temperature of 827 °C. If the maximum spectral
emissive power at that temperature is 1.37 x 10'° W/m”, determine the emissivity of
the body and the wavelength corresponding to the maximum spectral intensity of
radiation.
PART ட

Answer any two questions. Each question carries 20 marks.
List out the types of evaporators. Briefly describe the construction and operation of
the long tube vertical evaporator and the plate type evaporator.
Distinguish between dropwise and film wise condensation.
Write down the Rohsenow correlation and Zuber correlation for pool boiling.
Briefly describe the factors affecting condensation.
Briefly describe various types of fins.
Define fin efficiency and effectiveness.
Write down the Nusselt equation for determination of condensation heat transfer

coefficient.

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