A counter flow, concentric tube heat exchanger used for engine cooling has been in service for an extended period of time The heat transfer surface area of the exchanger is 5 m 2 , and the design value of the overall convection coefficient is 38 W m 2 K During a test run, engine oil flowing at 0 1 kg s is cooled from 110C to 66C by water supplied at a temperature of 25C and a flow rate of 0 2 kg so Determine whether fouling has occurred during the service period If so calculate the fouling factor, R ' ' f (m 2 K W)

Question: A counter flow, concentric tube heat exchanger used for engine cooling has been in service for an extended period of time. The heat transfer surface

A counter flow, concentric tube heat exchanger used for engine cooling has been in service for an extended period of time. The heat transfer surface area of the exchanger is 5 m², and the design value of the overall convection coefficient is 38 W/m² ∙ K. During a test run, engine oil flowing at 0.1 kg/s is cooled from 110°C to 66°C by water supplied at a temperature of 25°C and a flow rate of 0.2 kg/so Determine whether fouling has occurred during the service period. If so calculate the fouling factor, R''_f (m² ∙ K/W).

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