EXAMIANS
In an interphase heat transfer process, the equilibrium state corresponds to equality of temperature in the two phases, while the condition for equilibrium in an interphase mass transfer process is equality of
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At what value of Prandtl number, conduction is negligible in the turbulent core of a fluid flowing through a heated pipe?
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Heat transfer occurs by natural convection because change in temperature causes difference in
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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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Heat transfer by conduction in the turbulent core of a fluid flowing through a heated pipe is negligible, if the value of Prandtl number is
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In a single evaporator system, the steam economy __________ by creating vacuum in the evaporator.
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The purpose of providing expansion bellows in the shell of tubular exchanger is to
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The unit of heat transfer co-efficient in SI unit is
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Rate of crystallisation does not depend upon the
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The overall resistance for heat transfer through a series of flat resistance, is the __________ of the resistances.
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