An electric resistance heater is embedded in a long cylinder of diamet

1.	An electric resistance heater is embedded in a long cylinder of diameter 30 mm. Whenwater with a temperature of 25 ◦C 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 of90 ◦C is 28 kW/m. When air, also at 25 ◦C, but with a velocity of 10 m/s is flowing, thepower 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.
Answer» ANSWER: 34 SURFACE and KW 100area surfaceok thi se my answers ALSO right answer ok

An electric resistance heater is embedded in a long cylinder of diameter 30 mm. Whenwater with a temperature of 25 ◦C 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 of90 ◦C is 28 kW/m. When air, also at 25 ◦C, but with a velocity of 10 m/s is flowing, thepower 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.

Answer»

ANSWER:

34 SURFACE and KW 100area surfaceok thi se my answers ALSO right answer ok

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