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     EduGorilla 
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    In a counter-flow double pipe heat exchanger, oil (m = 2 kg/s, Cp = 2.1 kJ/kgo C) is cooled from 90˚C to 40˚C by water (m = 1 kg /s, CP = 4.2 kJ /kg˚C) which enters the inner tube at 10˚C. The radius of the inner tube is 3 cm and its length is 5 m. Neglecting the wall resistance, the overall heat transfer coefficient based on the inner radius in (kW/m2 .K) is

    Options :-

    1. 0.743
    2. 7.43
    3. 74.3
    4. 2475
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Reply To: In a counter-flow double pipe heat exchanger, oil (m = 2 kg/s, Cp = 2.1 kJ/kgo C) is cooled from 90&….
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