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Air at 29°C (Cp = 1006 J/kg·°C) is to be heated to 70°C by hot oil...

Air at 29°C (Cp = 1006 J/kg·°C) is to be heated to 70°C by hot oil at 80°C (Cp = 2150 J/kg·°C) in a cross-flow heat exchanger with air mixed and oil unmixed. The product of heat transfer surface area and the overall heat transfer coefficient is 750 W/m2 ·°C and the mass flow rate of air is twice that of oil.

Determine: (a) the effectiveness of the heat exchanger (b) the mass flow rate of air (c) the rate of heat transfer

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