Primernost optičnih lastnosti slovenskih premogov za uplinjanje s koncentriranim sončnim sevanjem
The radiative properties of Slovenian coals as an absorptive substance for gasification by concentrated solar radiation

english
slovenian

2004

volume 50, issue 9

Univerza v Ljubljani, Fakulteta za strojništvo

In this paper the idea of coal gasification by concentrated solar radiation isdescribed. The calculations are performed on the basis of Miećs scattering theory for spheres of arbitrary sizes. Some aspects of the Mie calculations are discussed, a new criterion for the sufficient condition for the convergence of the amplitude functions is presented and a new efficiency factor for reflection is introduced. The optical properties of selected coals are determined on the basis of their chemical composition. The absorption and reflection properties of the coals and carbonaceous materials, such as carbon black, coke, anthracite and black coal, are determined. The results of the spectral properties calculations are extended to the global properties on thebasis of the spectral intensities of the solar radiation. The conditions for a high-efficiency process involving brown-coal gasification are defined bya determination of the most suitable sizes of brown coal particles for the particle-gas suspension.

16.09.2009