The dark surface of a ceramic stove top may beapproximated
Chapter 12, Problem 12.19(choose chapter or problem)
The dark surface of a ceramic stove top may beapproximated as a blackbody. The burners, whichare integral with the stove top, are heated from belowby electric resistance heaters.(a) Consider a burner of diameter D?200 mmoperating at a uniform surface temperature ofTs?250C in ambient air at T??20C. With-out a pot or pan on the burner, what are the ratesof heat loss by radiation and convection fromthe burner? If the efficiency associated withenergy transfer from the heaters to the burners is90%, what is the electric power requirement?At what wavelength is the spectral emission amaximum?(b) Compute and plot the effect of the burner tempera-ture on the heat rates for 100Ts350C.
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