Chemical Engineering :: Heat Transfer
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Hot water (0.01 m3 /min) enters the tube side of a counter current shell and tube heat exchanger at 80°C and leaves at 50°C. Cold oil (0.05 m3/min) of density 800 kg/m3 and specific heat of 2 kJ/kg.K enters at 20°C. The log mean temperature difference in °C is approximately
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In a heat exchanger, floating head is provided to
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Leidenfrost point is a term concerned with the
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A process stream of dilute aqueous solution flowing at the rate of10 Kg.s-1 is to be heated. Steam condensate at 95°C is available for heating purpose, also at a rate of 10 Kg.s-1. A 1 - 1 shell and tube heat exchanger is available. The best arrangement is
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Heat produced when a steady state current, I passes through an electrical conductor having resistance, 'R' is
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Pick out the wrong statement.
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Convective heat transfer co-efficient in case of fluid flowing in tubes is not affected by the tube length/diameter ratio, if the flow is in the __________ zone.
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The actual temperature drop across the heating surface in an evaporator depends on the
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Which of the following is not used as a medium for high temperature heating ?
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Presence of a non-condensing gas in a condensing vapour
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A.
Orifice baffles are never used in a shell and tube heat exchanger.
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B.
Pressure drop on the shell side of a heat exchanger depends upon tube pitch also.
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C.
In a horizontal tube evaporator, surface blanketing by air is avoided.
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D.
Split ring type and pull through type floating heads are two commonly used floating heads is heat exchangers.
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