Where Qrad = Qsolar – Qabs is the reactor radiation heat losses. The total incident radiation at sample front surface
from solar simulator is 746.11 W. The net absorbed energy, net radiation losses and absorption efficiency, maximum
temperature attained by the sample are predicted as a function of time and shown in fig 6(a) and (b) respectively. As
expected, the net radiation absorption is high at initial stage; it absorbs almost the total energy except the reflected
radiation. Then, the net absorption energy is gradually decreasing when the temperature of the sample increased.
The net absorption power is reduced mostly by radiation losses when the temperature of the sample is above 1000 K
[5]. Thus, the absorption efficiency and the maximum temperature attained by the sample are respectively