A countercurrent heat exchanger was designed with an overall heat transfer coefficient of 900 kcal/hr-m-°C. The heat transfer area of a newly designed heat exchanger is 7 m². Over a period of time, its overall heat transfer coefficient has fallen to 450 kcal/hr mt²°C due to fouling. Given: Specific heat of hot fluid = 1 kcal/kg °C Hot fluid entering temperature = 90°C Hot fluid leaving temperature = 65°C Cold fluid entering temperature = 25°C Cold fluid leaving temperature = 40°C Required: How much additional area is to be added to maintain the same rate of heat transfer? Need asap pls
Heat Exchangers
Heat exchangers are the types of equipment that are primarily employed to transfer the thermal energy from one fluid to another, provided that one of the fluids should be at a higher thermal energy content than the other fluid.
Heat Exchanger
The heat exchanger is a combination of two words ''Heat'' and ''Exchanger''. It is a mechanical device that is used to exchange heat energy between two fluids.
A countercurrent heat exchanger was designed with an overall heat transfer coefficient of 900 kcal/hr-m-°C. The heat transfer area of a newly designed heat exchanger is 7 m². Over a period of time, its overall heat transfer coefficient has fallen to 450 kcal/hr mt²°C due to fouling.
Given:
Specific heat of hot fluid = 1 kcal/kg °C
Hot fluid entering temperature = 90°C
Hot fluid leaving temperature = 65°C
Cold fluid entering temperature = 25°C
Cold fluid leaving temperature = 40°C
Required: How much additional area is to be added to maintain the same rate of heat transfer?
Need asap pls
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