A cross-flow heat exchanger is used to transfer heat from a stream of saturated water at  100 °C to a stream of air entering at 40 °C. The UA value of the heat exchanger is 5000 W/K.  Develop an equation for the outlet temperature of the air as a function of the mass flow rate of air through the heat exchanger. Plot the outlet air temperature vs. mass flow rate of air from 0.5 kg/s to 20 kg/s

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
8th Edition
ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
Publisher:Kreith, Frank; Manglik, Raj M.
Chapter6: Forced Convection Over Exterior Surfaces
Section: Chapter Questions
Problem 6.38P
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 A cross-flow heat exchanger is used to transfer heat from a stream of saturated water at 
100 °C to a stream of air entering at 40 °C. The UA value of the heat exchanger is 5000 W/K. 
Develop an equation for the outlet temperature of the air as a function of the mass flow rate of air through the heat exchanger. Plot the outlet air temperature vs. mass flow rate of air from 0.5 kg/s to 20 kg/s.  

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