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An oil cooler for a lubrication system has to cool 1000 kg/h of oil (c,= 2.09 kJ/kg°C) from 80°C to 40°C by using a cooling water flow of 1000 kg/h at 30°C. (i) Give your choice for a parallel flow or counter-flow heat exchanger, with reasons. (ii) Evaluate the surface area of the heat exchanger, if the overall heat transfer coefficient is 25 W/m²ºC. Take c, of water = 4.18 kJ/kg°C. 20

An oil cooler for a lubrication system has to cool 1000 kg/h of oil (c,= 2.09 kJ/kg°C) from 80°C to 40°C by using a cooling water flow of 1000 kg/h at 30°C. (i) Give your choice for a parallel flow or counter-flow heat exchanger, with reasons. (ii) Evaluate the surface area of the heat exchanger, if the overall heat transfer coefficient is 25 W/m²ºC. Take c, of water = 4.18 kJ/kg°C. 20

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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An oil cooler for a lubrication system has to cool 1000 kg/h of oil (c,= 2.09 %3D kJ/kg°C) from 80°C to 40°C by using a cooling water flow of 1000 kg/h at 30°C. (i) Give your choice for a parallel flow or counter-flow heat exchanger, with reasons. (ii) Evaluate the surface area of the heat exchanger, if the overall heat transfer coefficient is 25 W/m2C. Take c, of water = 4.18 kJ/kg°C.
Transcribed Image Text:An oil cooler for a lubrication system has to cool 1000 kg/h of oil (c,= 2.09 %3D kJ/kg°C) from 80°C to 40°C by using a cooling water flow of 1000 kg/h at 30°C. (i) Give your choice for a parallel flow or counter-flow heat exchanger, with reasons. (ii) Evaluate the surface area of the heat exchanger, if the overall heat transfer coefficient is 25 W/m2C. Take c, of water = 4.18 kJ/kg°C.
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