Chemical Engineering :: Heat Transfer
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Film boiling occurs at __________ pressure.
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Heat flux through several resistances in series in analogous to the current flowing through several
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Extended heat transfer surface like fins are used to increase the heat transfer rate. Fin efficiency is defined as the ratio of heat transferred across the fin surface to the theoretical heat transfer across an equal area held at the
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Vacuum is generally maintained in the vapour space of an evaporator mainly to
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Double pipe heat exchangers are used
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Nusselt number (for forced convection heat transfer) is a function of the __________ number.
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Pick out the wrong statement.
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Which type of heat exchanger is preferred for heavy heat loads ?
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Pick out the wrong statement.
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A.
Heat transfer by radiation can not occur across an absolute volume.
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B.
In case of a shell and tube heat exchanger, the pressure drop through the shell is proportional to the number of times the fluid crosses the bundle between baffles.
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C.
Propagation velocity for travel of heat radiation through vacuum is equal to the velocity of the light.
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D.
The amount of heat involved in the condensation or vaporisation of 1 kg of a fluid is the same.
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