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help asap A concentric tube heat exchanger for cooling lubraicating hot oil is c

ID: 1860219 • Letter: H

Question

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A concentric tube heat exchanger for cooling lubraicating hot oil is comprised of thin-walled inner tube of 25-mm diameter carring water and a outer of 45-mm diameter carring the oil. The exchanger operates in counterflow with an overall heat transfer coefficient of 60 w/m2k.Mass flow rates of water and oil are the same,both equal to 0.1 Kg/s; water inlet temperature is 30 degree C,oil inlet temperature find the heat transfer rate find the water outlet temperature what is the length required as a counter flow heat exchanger? Keep all parameters unchanged, just swith the direction of one flow so the heat exchanger, what is the length required for this new configuration?

Explanation / Answer

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