Mechanical Engineering :: Heat Transfer,Refrigeration and Air Conditioning
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A condenser of refrigeration system rejects heat at the rate of 120 kW, while its compressor consumes a power of 30 kW. The coefficient of performance of the system will be
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In a shell and tube heat exchanger, baffles are provided on the shell side to
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The average value of thermal conductivity for water at 20° C saturate is about 0.51.
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In aqua-ammonia absorption refrigeration system, incomplete rectification leads to accumulation of water in
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The by-pass factor (B. P. F.) in case of sensible heating of air is (Where td1 = Dry bulb temperature of air entering the heating coil, td2 = Dry bulb temperature of air leaving the heating coil, and td3 = Dry bulb temperature of heating coil)
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The refrigerant used for absorption refrigerators working on heat from solar collectors is a mixture of water and
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Most air cooled condensers are designed to operate with a temperature difference of