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Methodology considering surface roughness in UV water disinfection reactors
Sultan, Tipu ; Cho, Jin-Soo
Chemical papers, 2016-06, Vol.70 (6), p.777-792
[Periódico revisado por pares]
Cham: Springer International Publishing
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Título:
Methodology considering surface roughness in UV water disinfection reactors
Autor:
Sultan, Tipu
;
Cho, Jin-Soo
Assuntos:
Biochemistry
;
Biotechnology
;
Chemistry
;
Chemistry and Materials Science
;
Chemistry/Food Science
;
Colebrook equation
;
fluence rate
;
friction coefficient
;
Industrial Chemistry/Chemical Engineering
;
Materials Science
;
Medicinal Chemistry
;
Original Paper
;
UV lamps
;
UV reactor
;
water disinfection
É parte de:
Chemical papers, 2016-06, Vol.70 (6), p.777-792
Descrição:
Water disinfection making use of an ultraviolet (UV) reactor is an attractive procedure because it does not produce any by-products. In this work, the effects of pipe roughness on the performance of a closed-conduit water disinfection UV reactor were investigated. In order to incorporate the surface roughness effects, a simple, stable, highly accurate model, better than any iterative approximation, was adopted in the numerical simulations. The analysis was carried out on the basis of two performance indicators: reduction equivalent dose (RED) and system dose distribution. The analysis was performed using a commercial computational fluid dynamics (CFD) tool (ANSYS Fluent). The fluence rate within the UV reactor was calculated using UVCalc3D. The pipe surface roughness resulted in longer pathogen residence times and higher dose distribution among the pathogens. The effect of pipe surface roughness on RED depends on the Reynolds number and relative roughness. Pipe surface roughness plays an important role because UV reactors for water disinfection operate at moderate Reynolds numbers. In addition, the positioning of the UV lamp in the reactor plays an important role in determining the RED of the reactor. Search criteria for lamp-positioning are also proposed in the current work. The proposed CFD methodology can be used to analyse the performance of closed-conduit reactors for water disinfection by UV.
Editor:
Cham: Springer International Publishing
Idioma:
Inglês;Alemão;Russo;Eslovaco
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