Consider a horizontal 0 7 m wide and 0 85 m long plate in a room at 30C Top side of the plate is insulated while the bottom side is maintained at 0C The rate of heat transfer from the room air to the plate by natural convection is (a) 36 8 W (b) 43 7 W (c) 128 5 W (d) 92 7 W (e) 69 7 W (For air, us...

Engineering
Heat And Mass Transfer Fundamentals And Applications
Consider a horizontal 0.7-m-wide and 0.85-m-long plate in a room

Consider a horizontal 0.7-m-wide and 0.85-m-long plate in a room at 30C. Top side of the plate is insulated while

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Consider a horizontal 0.7-m-wide and 0.85-m-long plate in a room at 30ºC. Top side of the plate is insulated while the bottom side is maintained at 0ºC. The rate of heat transfer from the room air to the plate by natural convection is
(a) 36.8 W

(b) 43.7 W

(d) 92.7 W

(e) 69.7 W
(For air, use k = 0.02476 W/m · K, Pr = 0.7323, v= 1.470 × 10^-5 m²/s)

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