engineering recuitment GATE ME 2023-24 Test Series Heat Transfer Radiation Heat Exchange Between Non-Black Bodies
In a specific setup, the radiant heat transfer rate between two plates (emissivity = 0.7) should not exceed 400 W/m2. The steady state temperatures of the plates are 500 K and 300 K respectively. For shielding purpose, any number of plates of emissivity 0.8 are readily available.
Which of the following statements are true?1
The radiant heat transfer rate between two plates is 1660.87 W/m2
2
The percentage drop occurred by one shield is 44.68 %
3
Minimum no. of shields required to keep the heat transfer rate below 400 W is 3.
4
Minimum no. of shields required to keep the heat transfer rate below 400 W is 4.