Abstract
This work presents the modeling and optimization of an indirectly irradiated solar receiver. A numerical model of the cavity-absorber block is put forward with the coupling of the net-radiation method using infinitesimal areas and a CFD code. An iterative method with a relaxation factor made it possible to obtain the temperature distribution and the developed code was implemented in the form of UDF and used as boundary conditions in the CFD model of the absorber to simulate the flow of air and heat transfer. The good ability of the receiver to transfer heat to the fluid is proved with a 92% thermal efficiency obtained. Then the combination of the Kriging surface response method and the MOGA allowed the mathematical optimization of the receiver. The multi-objective optimization made it possible to obtain 3 candidates giving the best combinations of design parameters from the fixed objectives.Three bullet points, highlighting the customization of the procedure.•A practical analysis using the net-radiation method using infinitesimal areas is applied for cavity radiative exchange model.•The code developed for the cavity is implemented in the boundary conditions at the level of the ANSYS Fluent CFD model allowing the simulation of the conjugated transfers within the absorber.•The optimization method proposed is the combination of the Kriging surface response method for quantitative and qualitative analysis of the design parameters and MOGA to obtain different combinations seeking to maximize or to minimize the chosen parameters.
Highlights
This work dealt with the numerical analysis of the radiative transfers of the cavity and the conjugate transfers of the absorber of a solar air receiver
The Composite Center method allowed the generation of 90 design points for a plan of experiments. This constituted a database for creating a response surface using a regression analysis based on the Kriging method
The quantitative and qualitative analysis of the design parameters on the exit temperature showed that the porosity is the parameter having the most impact on the exit temperature with a percentage of 62%
Summary
Modeling and optimization method of an indirectly irradiated solar receiver Baye A. Ndiogoua,*, Ababacar Thiama,b, Cheikh Mbowc, Mohamed Izzedine S. Vincent Samboua a Laboratoire d’Energétique Appliquée, Ecole Supérieure Polytechnique, Université Cheikh Anta Diop de Dakar, PO:5085, Dakar-Fann, Senegal b Departement de Physique, Université Alioune Diop de Bambey, Senegal c Faculté des Sciences et Techniques, Université Cheikh Anta Diop de Dakar, Senegal
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