Chemical Engineering :: Heat Transfer
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If average heat transfer co-efficient is ha and the local coefficient at the end of the plate is hl then in case of heat transfer to a fluid flowing over a flat plate, heated over its entire length
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jH factor for heat transfer is not a function of the __________ number.
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The Fourier number (defined as a.t/L2) is used in the analysis of problem involving heat transfer by
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The energy radiated from a surface Q at absolute temperature T is related as
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Baffles are provided in heat exchangers to increase the
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200 kg of solids (on dry basis) is subjected to a drying process for a period of 5000 seconds. The drying occurs in the constant rate period with the drying rate as, Nc = 0.5 x 10-3 kg/m2.s. The initial moisture content of the solid is 0.2 kg moisture/kg dry solid. The interfacial area available for drying is 4 m2/1000 kg of dry solid. The moisture content at the end of the drying period is (in kg moisture/kg dry solid)
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In case of a vertical tube evaporator, with increase in the liquor level, the
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The ratio of total radiating power to the absorptivity of the body depends upon the __________ as per Kirchoffs law.
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For gases, the thermal conductivity increases with temperature rise. For liquids, with increase in concentration, its thermal conductivity generally
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