Question: A single-pass, cross-flow heat exchanger with both fluids unmixed is being used to heat water (m c = 2 kg/s. c p = 4200 J/kg

A single-pass, cross-flow heat exchanger with both fluids unmixed is being used to heat water (m_c = 2 kg/s. c_p = 4200 J/kg ∙ K) from 20°C to 100°C with hot exhaust gases (c_p = 1200 J/kg ∙ K) entering at 320°C. What mass flow rate of exhaust gases is required? Assume that VA is equal to its design value of 4700 W IK, independent of the gas mass flow rate.

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