A concentric tube heat exchanger for cooling lubricating oil is comprised of a thin-walled inner tube of 25mm diameter carrying water and an outer tube of 45mm diameter carrying the oil. The exchanger operates in counterflow with an overall heat transfter coefficient of 60 W/m2K and tabulated average properties. a.
If the outlet temperature of the oil is 60, determine the total heat transfer and the outlet temperature of the water. b. Determine the length required for the heat exchanger.
(풀이) LM...
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열전달
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