Determine net radiation heat transfer per m2 for two infinite parallel plates held at temperature of 800 K and 500 K respectively. Emissivities of hot and cold plates are 0.6 and 0.4 respectively. Now...

Determine net radiation heat transfer per m2

for two infinite parallel plates

held at temperature of 800 K and 500 K respectively. Emissivities of hot

and cold plates are 0.6 and 0.4 respectively. Now it is intended to reduce

the heat transfer to 40% of original value by placing a radiation shied

between the plates. Calculate the emissivity of the shield and its

equilibrium temperature.