Maurice Tutor

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    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

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    Phoniex University
    Oct-2001 - Nov-2016

Category > Management Posted 10 Oct 2017 My Price 5.00

emissivity of an electrically

The diameter and surface emissivity of an electrically heated plate are D = 300 mm and  ε = 0.80, respectively.

 

(a) Estimate the power needed to maintain a surface temperature of 200°C in a room for which the air and the walls are at 25°C. The coefficient characterizing heat transfer by natural convection depends on the surface temperature and, in units of W/m2 ∙ K, may be approximated by an expression of the form h = 0.80(Ts - ∞)1/3.

(b) Assess the effect of surface temperature on the power requirement, as well as on the relative contributions of convection and radiation to heat transfer from the surface.

Answers

Maurice Tutor
(5)
Status NEW Posted 10 Oct 2017 10:10 PM My Price 5.00

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