Irradiance modeling in annular photoreactors using the finite-volume method

Durán, J. Esteban; Taghipour, Fariborz; Mohseni, Madjid

doi:10.1016/j.jphotochem.2010.07.027

Cited by 57 publications

(42 citation statements)

References 31 publications

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“…For the NCE reactor, where the three lamps were placed close to each other, the UV beams could be reflected more than once by adjacent lamp/sleeve pairs, a process that was not likely for other two lamp configurations. In addition, photons emitted from adjacent lamps could be absorbed in the plasma of a receiving lamp to induce additional emission (i.e., reemission) [8,9,21]. This perhaps explains why the experimental FRs in this central region were higher than the model predictions (see Fig.…”

Section: Radial Fr Distributionsmentioning

confidence: 88%

In situ detailed fluence rate distributions in a UV reactor with multiple low-pressure lamps: Comparison of experimental and model results

Li¹,

Qiang²,

Bolton³

2013

Chemical Engineering Journal

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Section: Radial Fr Distributionsmentioning

confidence: 88%

In situ detailed fluence rate distributions in a UV reactor with multiple low-pressure lamps: Comparison of experimental and model results

Li¹,

Qiang²,

Bolton³

2013

Chemical Engineering Journal

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“…The FR distribution inside the reactor chamber was predicted with the discrete ordinates (DO) radiation model, with the UV light assumed to be emitted from the lamp sleeve [19]. The temperature of the computational domain was set close to zero (3 K in this study) to eliminate the interference of blackbody emission [20]. To mimic the movements of microorganisms flowing through the reactor, more than 5000 micro simulating particles were released at the inlet with their trajectories simulated using the Lagrangian approach of the discrete phase model.…”

Section: Model Settingsmentioning

confidence: 99%

Configuration optimization of UV reactors for water disinfection with computational fluid dynamics: Feasibility of using particle minimum UV dose as a performance indicator

Bolton

et al. 2016

Chemical Engineering Journal

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h i g h l i g h t sD min was used as a performance indicator for UV reactor configuration optimization. D min proved to be a qualified alternative to RED for UV reactor optimal design. Reactor with a well-mixed flow dispersed by lamp array had the best performance. Disinfection capability of the optimally designed UV reactor was elevated by 47À100%. t r a c tComputational fluid dynamics is a powerful tool for ultraviolet (UV) reactor performance evaluation, since it allows the reactor configuration optimization by comparing the performance indicator [e.g., reduction equivalent dose (RED)] of various UV reactors. In this study, a new performance indicator independent of the microbial UV dose-response curve, namely particle minimum UV dose (D min ), was introduced, and its feasibility was evaluated in the configuration optimization of 3-lamp UV reactors for water disinfection. Results indicate that the D min could serve as an alternative to the RED in characterizing the UV reactor performance. In general, reactors with a normal (NOR) lamp position pattern (i.e., with one lamp on the top and two at the bottom) had larger D min values (110À193 mW cm À2) than those with a reverse (REV) lamp position pattern (i.e., with two lamps on the top and one at the bottom) (98À160 mW cm ) was obtained in an UV reactor with a lamp relative distance (i.e., the ratio of the distance between the lamp and reactor axes to the reactor radius) of 0.4 and an inlet internal diameter of 75 mm, which could be ascribed to a well-mixed flow resulting from an optimal dispersion of the influent flow by the lamp array. The maximum disinfection flow rate of the UV reactor with the optimal configuration was elevated by 47À100% compared to those of the non-optimally designed reactors, which led to an energy saving efficiency of 32À50%.

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“…At 100 torr or lower pressure, there are not enough Nitrogen molecules colliding with Arm, so that more argon related species are excited and give out more near IR emission. At 200-300 torr, the Nitrogen molecules are just suitable, and the lamp will give out more UV emission and less near IR emission than at 100 torr [17].…”

Section: Resultsmentioning

confidence: 99%