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(Solved): In a cross-flow recuperator with both fluids unmixed, hot air flows through the tubes, and the cold ...
In a cross-flow recuperator with both fluids unmixed, hot air flows through the tubes, and the cold intake air flow across these tubes. The wall thickness of the tubes is negligible. The heat exchanger do be designed with mass flow rates
m_(h)^(˙)=m_(c)^(˙)=10k(g)/(s), heat transfer coefficients
h_(h)=h_(c)=
150(W)/(m^(2))K, and three end temperatures
T_(hi)=425\deg C,T_(ci)=25\deg C, and
T_(co)=210\deg C. We wish to determine: (a) the heat transfer area of the heat exchanger, and (b) the new outlet temperatures after doubling the flow of (1) the hot fluid, (2) the cold fluid,
