Numerical and experimental investigation of irradiance profiles on suspended particles in a flat disk photoreactor for hydrogen generation

Núnez F. A, Vial R, Evensen C, Munoz-Herrera C, Díaz R. L, Jovicic V, Delgado A, Toledo M (2023)

Publication Type: Journal article

Publication year: 2023

Journal

Chemical Engineering Science Elsevier

Book Volume: 282

Article Number: 119298

DOI: 10.1016/j.ces.2023.119298

Abstract

Regarding sustainable energy alternatives, the present work evaluates hydrogen production using suspended particles exposed to an irradiance of 247 W/m2. A 1.0 L flat disk photoreactor (FDP) was designed for evaluating agitation speeds of 100, 175, and 250 RPM, and particle concentrations of 0.5, 1.0, and 2.0 g/L. Through CFD-assisted, a non-conformal meshing of 551,000 polyhedral elements was created, coupling Volume of Fluids, Discrete Particle Modelling, and Discrete Ordinates Model methods. Transient simulation shows a maximum particle homogenization of 84 % at 0.5 g/L and 250 RPM, and a maximum average exposure profile of 140 W/m2 for 27% of the particles with an initial loading of 1.0 g/L at 250 RPM. Effective concentration in the FDP was measured, determining an accuracy of 84.35% and 71.32%, respectively, concerning the model used in the simulation. It is concluded that the FDP developed provides good semiconductor behavior for an effective hydrogen production process.

Authors with CRIS profile

Vojislav Jovicic Lehrstuhl für Strömungsmechanik

Involved external institutions

Universidad Técnica Frederico Santa María CL Chile (CL) Universidad de Santiago de Chile (USACH) / University of Santiago, Chile CL Chile (CL) German Engineering Research and Development Center LSTME KR Korea, Republic of (KR)

How to cite

APA:

Núnez F., A., Vial, R., Evensen, C., Munoz-Herrera, C., Díaz R., L., Jovicic, V.,... Toledo, M. (2023). Numerical and experimental investigation of irradiance profiles on suspended particles in a flat disk photoreactor for hydrogen generation. Chemical Engineering Science, 282. https://dx.doi.org/10.1016/j.ces.2023.119298

MLA:

Núnez F., Alfredo, et al. "Numerical and experimental investigation of irradiance profiles on suspended particles in a flat disk photoreactor for hydrogen generation." Chemical Engineering Science 282 (2023).

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