Engineering

Engineering, 28.11.2019 05:31, pgld7555

Aconcentric tube heat exchanger for cooling lubricating oil is comprised of a thin-walled inner tube of 25-mm diameter carrying water and an outer tube of 45-mm diameter carrying the oil. the exchanger operated in counterflow with an overall heat transfer coefficient of 60 w/m2∙k and the tabulated average properties.

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Engineering, 04.07.2019 18:20, maustin5323

Athin walled concentric tube exchanger is used to cool engine oil from 160°c to 60°c with water that is available at 25°c acting as a coolant. the oil and water flow rates are each at 2 kg/s, and the diameter of the inner tube is 0.5 m and the corresponding value of the overall heat transfer coefficient is 250 w/m2. oc. how long must the heat exchanger be to accomplish the desired cooling? cpwater=4.187 kj/kg-candcpengine el=2.035 kj/kg·°c, oil . 120]

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Chemistry, 02.08.2019 20:30, Greekfreak

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?

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Engineering, 22.08.2019 19:10, prettyswagg63oz3tyz

Acounter-flow, double-tube (shell-and-tube) heat exchanger is used to cool the lubricating oil for large industrial gas turbine engine by cooling water which enters the heat exchanger at 30°c the copper inner tubes have a diameter of 2 cm and negligible thickness, while the inner diameter of the outer annulus (the shell) is 4 cm. water flows through the tube at a rate of 0.18 kg/s, and the oil through the shell at a rate of 0.12 kg/s. the inlet and outlet temperatures of oil are 95°c and 65°c, respectively. assume the tube wall resistance, fouling factors and heat loss to the surroundings are negligible. design the heat exchanger.

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