T<sub>ambient</sub> = 25<sup>o</sup>C
Figure Q3: Heat Transfer by sun radiation
Refer to figure 3, in summer session, the person (average area = 1.6 m<sup>2</sup>) with the temperature body is 37
<sup>o</sup>C and the ambient temperature is 25 <sup>o</sup>C. Consider the Stefan Boltzman coefficient given 5.676 x 10<sup>8</sup>
W/m<sup>2</sup>.K<sup>4</sup> and the person is black body, Calculate:-
(a) The rate of heat transfer emitted to person by radiation in W
ans 122.52 W
(b) The rate of heat transfer of radiation if the person is grey bodies, the emissivity is 0.80 ans 98W
(c) What is your conclusion for answer (b) and (c)?