The surface temperature of a 3.5 m high, 6 m wide wall is 15 ◦C. The room air is maintained at 23◦C with a thermostat. E
Posted: Mon May 09, 2022 10:25 am
The surface temperature of a 3.5 m high, 6 m wide wall is 15 ◦C.
The room air
is maintained at 23◦C with a thermostat. Estimate the heat transfer
between the room air
and the wall. [Ans. Lc = 3.5 m; RaL = 3.71 × 1010; NuL = 507; hbarL
= 3.69 W·m−2·K−1;
Q = 620 W; note that for an ideal gas, β = 1/T∞.]
The room air
is maintained at 23◦C with a thermostat. Estimate the heat transfer
between the room air
and the wall. [Ans. Lc = 3.5 m; RaL = 3.71 × 1010; NuL = 507; hbarL
= 3.69 W·m−2·K−1;
Q = 620 W; note that for an ideal gas, β = 1/T∞.]