OCR Text |
Show another heat balance by the same procedure. where, Qh : heat generation In these Eqs.(15) and (16), QOU1 is given by where, a : self absorption factor ? / mixture (15) wall (16) mixture (17) wall (18) In this study, the amount of radiative energy emitted from an element I and absorbed by another element J will be expressed as R(1(I,J)Q out(l), where Rd(l,J) is obtained by the ratio of energy from I and absorbed energy by J. The value of Rd(I,J) is independent to temperature in each element and only depend on the profile of extinction coefficient and scattering albedo in the mixture, and also on the emissivity of walls. This value of R(1(I,J) can be calculated by the Monte Carlo method, but it requires a certain amount of computing time in the mixture of gas and particle with scattering effect. Next, the radiative energy absorbed by an element J is obtained by adding each energy transferred to J from all elements. Qin(J)=L RjlJ>Qour(l) mixture and wall (19) I Furthermore, the self absorption factor of element J may be obtained by |