Engineering, 07.04.2020 04:26 Bassoonist
An electric resistance heater is embedded in a long cylinder of diameter 30 mm. When water with a temperature of 25 oC and velocity of 1 m/s flows crosswise over the cylinder, the power per unit length required to maintain the surface at a uniform temperature of 90 oC is 28 kW/m. When air, also at 25 oC, but with a velocity of 10 m/s is flowing, the power per unit length required to maintain the same surface temperature is 400 W/m.
Calculate and compare the convection coefficients for the flows of water and air.
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An electric resistance heater is embedded in a long cylinder of diameter 30 mm. When water with a te...
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