kingoftime

02.08.2019 • 

Chemistry

Acounterflow concentric heat tube heat exchanger is used to cool the lubricating oil for a large industrial gas turbine engine. the flow rate of cooling water through the inner tube (di= 2.5 cm) is 0.2 kg/s while the flow rate of oil through the outer annulus (do= 4.5 cm) is 0.1 kg/s. consider the uvalue to be equal to 38.1 w/(m2. k). the oil and water enter at temperatures of 100 and 30oc respectively. how long must the tube be made if the outer temperature of the oil is to be 60oc?

Ответ:

alexabdercmur

02.04.2021

Chemistry

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I believe ur answer is b. Is not stored in vesicles but is made on demand.
 hope this helps.

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