A single pass cross flow heat exchanger uses hot air (mixed) to heat water (unmixed), flowing with a mass flow rate of 3 kg s, from 30 deg C to 80 deg C The hot air enters and exits the heat exchanger at 220 deg C and 100 deg C, respectively If the overall heat transfer coefficient is 200 W m 2 mid...

A single-pass cross-flow heat exchanger uses hot air (mixed) to heat water (unmixed), flowing with a mass

Question:

A single-pass cross-flow heat exchanger uses hot air (mixed) to heat water (unmixed), flowing with a mass flow rate of 3 kg/s, from 30°C to 80°C. The hot air enters and exits the heat exchanger at 220°C and 100°C, respectively. If the overall heat transfer coefficient is 200 W/m²·K, determine the required surface area.

Alr flow (mixed) Water flow (unmixed)