Consider two very large parallel plates. The bottom plate is warmer than the top plate, which is held at a constant temperature of T₁ = 330 K. The plates are separated by L = 0.1m and the gap between the two surfaces is filled with air at atmospheric pressure. The heat flux from the bottom plate is q" = 250 W/m².

(a) Determine the temperature of the bottom plate and the ratio of the convective to radiative heat fluxes for ε₁ = ε₂ = 0.5. Evaluate air properties at T = 350 K.

(b) Repeat part (a) for ε₁ = ε₂ = 0.25 and 0.75.

Transcribed Image Text:

Outdoor air 厂insulation, k-a035 wmrk, thicknessに0.3 m , T. ,-. Ceiling, T, " 0.05 o 0.94 Walls, Rink air ㄥ ice,