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International Journal of Chemical Engineering
Volume 2014, Article ID 310720, 13 pages
Research Article

Fluence Rate in UV Photoreactor for Disinfection of Water: Isotropically Radiating Cylinder

Joint Stock Company “Svarog”, Stromynka Street 18, Moscow 107014, Russia

Received 28 February 2014; Accepted 29 August 2014; Published 10 November 2014

Academic Editor: Alírio Rodrigues

Copyright © 2014 Roman Ilinsky and Andrey Ulyanov. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The calculation of fluence rate in the photochemical reactor using ultraviolet (UV) radiation for disinfection of water for the case, when a cylinder of infinite length is used as a light source, has been considered. Such a cylinder is filled with an isotropically radiating medium. The dependence of the fluent rate on the diameter of the radiating cylinder has been analytically analyzed. The limiting case when the diameter of the radiating cylinder tends to zero has been considered and the notion of “effective interval” has been introduced. Based on this notion, the comparison of fluence rates for the cylinders of finite and infinite lengths has been performed. In the calculations of fluence rate, it is advisable to use the Chebyshev method for the operations of numerical integration.