A performance test is being conducted on a doublepipe counter-flow heat exchanger that carries engine oil and water at a flow rate of 2.5 kg/s and 1.75 kg/s, respectively. Since the heat exchanger has been in service over a long period of time, it is suspected that the fouling might have developed inside the heat exchanger that might have affected the overall heat transfer coefficient. The test to be carried out is such that, for a designed value of the overall heat transfer coefficient of 450 W/m2·K and a surface area of 7.5 m2, the oil must be heated from 25°C to 55 °C by passing hot water at 100°C (cp = 4206 J/kg·K) at the flow rates mentioned above. Determine if the fouling has affected the overall heat transfer coefficient. If yes, then what is the magnitude of the fouling resistance?
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 performance test is being conducted on a doublepipe
counter-flow heat exchanger that carries engine oil and
water at a flow rate of 2.5 kg/s and 1.75 kg/s, respectively.
Since the heat exchanger has been in service over a long
period of time, it is suspected that the fouling might have
developed inside the heat exchanger that might have affected
the overall heat transfer coefficient. The test to be carried out
is such that, for a designed value of the overall heat transfer
coefficient of 450 W/m2·K and a surface area of 7.5 m2, the
oil must be heated from 25°C to 55 °C by passing hot water at
100°C (cp = 4206 J/kg·K) at the flow rates mentioned above.
Determine if the fouling has affected the overall heat transfer
coefficient. If yes, then what is the magnitude of the fouling
resistance?
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