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Two large diffuse Gray parallel plates, separated by a small distance, have surface temperature of 400 K and 300 K. If the emissivities of the surfaces are 0.8 and the Stefan-Boltzmann constant is 5.67 × 10-8W/m2K4, the net radiation heat exchange rate in kW/m2 between the two plates is
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- 0.66
- 0.79
- 0.99
- 3.96
Correct Option: A
| qT-2 = | |||||
| + | - 1 | ||||
| ε1 | ε2 | ||||
| = | (2/8)-1 |
= 0.66 kW/m2
