Download - Heat Exchanger Problem

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11.48 A single-pass, cross-flow heat exchanger with both fluids unmixed is being used to heat water (, ) from 20 C to 100 C with hot exhaust gases ( entering at 320 C. What mass flow rate of exhaust gases is required? Assume that UA is equal to its design value of 4700 W/K, independent of the gas mass flow rate.