EXAMIANS
Absorptivity and refletivity of a perfect black body are respectively
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A 10 cm dia steam pipe, carrying steam at 180°C, is covered with an insulation (conductivity = 0.6 W/m.°C). It losses heat to the surroundings at 30°C. Assume a heat transfer co-efficient of 0.8 W/m².°C for heat transfer from surface to the surroundings. Neglect wall resistance of the pipe and film resistance of steam. If the insulation thickness is 2 cms, the rate of heat loss from this insulated pipe will be
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Radiation energy is emitted by all the substances, which are above
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What is the steam economy in case of a single effect evaporator system?
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At what value of Prandtl number, the hydrodynamic and thermal boundary layers are identical?
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Evaporation by thermocompression results in the
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In a parallel flow heat exchanger, if the outlet temperature of hot and cold fluids are the same, then the log mean temperature difference (LMTD) is
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LMTD can't be used as such without a correction factor for the
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The separation of liquid droplets from the vapor is done by a/an __________ , in the evaporators.
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For a cold dilute feed to produce thick viscous liquor, backward feeding as compared to forward feeding results in
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