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Unformatted text preview: 612 W/m 2 ⋅ K. What is the heat transfer surface area required? If the inside tube has a diameter of 2.5 cm, determine the length of the heat exchanger. 4. A single-pass, cross-flow heat exchanger uses hot exhaust gases (mixed) to heat water (unmixed) from 30°C to 80°C at a rate of 3 kg/s. The exhaust gases, having thermophysical properties similar to air, enter and exit the heat exchanger at 225°C and 100°C, respectively. If the overall heat transfer coefficient is 250 W/m 2 ⋅ K, estimate the required surface area. ME 416 CAD of Thermal Systems 2 5. Consider the plate-fin compact heat exchanger shown below. 8.5 mm 32 mm 34 mm Fin Pitch: 230 fins/m Fin Thickness: 0.20 mm Tube Wall Thickness: 0.25 mm Determine the ratio of solid volume to total volume for this heat exchanger....
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- Fall '07
- 20°C, 3 kg, 32 mm, 30°C, 34 mm