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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» <html><body><p><strong><a href="https://interviewquestions.tuteehub.com/tag/answer-15557" style="font-weight:bold;" target="_blank" title="Click to know more about ANSWER">ANSWER</a>:</strong></p><p>34 <a href="https://interviewquestions.tuteehub.com/tag/surface-1235573" style="font-weight:bold;" target="_blank" title="Click to know more about SURFACE">SURFACE</a> and <a href="https://interviewquestions.tuteehub.com/tag/kw-1063128" style="font-weight:bold;" target="_blank" title="Click to know more about KW">KW</a> 100area surfaceok thi se my answers <a href="https://interviewquestions.tuteehub.com/tag/also-373387" style="font-weight:bold;" target="_blank" title="Click to know more about ALSO">ALSO</a> right answer ok</p></body></html> | |