A polished metal pipe 5 cm outside diameter and 370 K temperature at the outer surface is exposed to ambient conditions at 295 K temperature. The emissivity of the surface is 0.2 and the convection coefficient of heat transfer is 11.35 W/m2 degree. Calculate the overall coefficient of heat transfer by the combined mode of convection and radiation

A polished metal pipe 5 cm outside diameter and 370 K temperature at t

1.	A polished metal pipe 5 cm outside diameter and 370 K temperature at the outer surface is exposed to ambient conditions at 295 K temperature. The emissivity of the surface is 0.2 and the convection coefficient of heat transfer is 11.35 W/m² degree. Calculate the overall coefficient of heat transfer by the combined mode of convection and radiation
A.	11.04 W/m<sup>2</sup> degree
B.	12.04 W/m<sup>2</sup> degree
C.	13.04 W/m<sup>2</sup> degree
D.	14.04 W/m<sup>2</sup> degree
Answer» D. 14.04 W/m<sup>2</sup> degree

Discussion

No Comment Found

Related MCQs

A body through which all the incident radiations passes, is called
With respect to incident radiation, transmissivity varies with
Radiant energy with an intensity of 800 W/m2 strikes a flat plate normally. The absorptivity is thrice the reflectivity and twice the transmissivity. Determine the rate of transmission
A polished metal pipe 5 cm outside diameter and 370 K temperature at the outer surface is exposed to ambient conditions at 295 K temperature. The emissivity of the surface is 0.2 and the convection coefficient of heat transfer is 11.35 W/m2 degree. Calculate the overall coefficient of heat transfer by the combined mode of convection and radiation
Of the radiant energy 350W/m2 incident upon a surface 250W/m2 is absorbed, 60W/m2 is reflected and the remainder is transmitted through the surface. Workout the value for absorptivity for the surface material
WITH_RESPECT_TO_INCIDENT_RADIATION,_TRANSMISSIVITY_VARIES_WITH?$
A body through which all the incident radiations passes, is called$
Radiant energy with an intensity of 800 W/m<sup>2</sup> strikes a flat plate normally. The absorptivity is thrice the reflectivity and twice the transmissivity. Determine the rate of transmissio?
A polished metal pipe 5 cm outside diameter and 370 K temperature at the outer surface is exposed to ambient conditions at 295 K temperature. The emissivity of the surface is 0.2 and the convection coefficient of heat transfer is 11.35 W/m<sup>2</sup> degree. Calculate the overall coefficient of heat transfer by the combined mode of convection and radiation
Transmissivity is defined as

Discussion

No Comment Found

Related MCQs

Reply to Comment