Direct absorption solar collector with magnetic nanofluid: CFD model and parametric analysis

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Multiphase CFD model of a direct absorption solar collector was developed.

The model was validated against two experimental datasets.

Different tilt angles, particle sizes, concentrations and magnetic fields tested.

Thermomagnetic convection enhances the efficiency by 30%.


Direct absorption collectors (DAC) with nanofluid are among the most promising yet least studied in solar energy technology. There are numerous micro- and macroscopic factors that determine their efficiency. This complicates in situ optimization of DACs using physical prototypes. The present paper describes a multiphase CFD model of the collector, which was validated against two independent experimental datasets. The model was used for a multiparametric numerical analysis, where we altered concentration and size of the nanoparticles, as well as the geometry and inclination of the collector. The optimization resulted in up to 10% improvement in the collector’s efficiency. Finally, we considered the process of thermomagnetic convection in the collector using a magnetic nanofluid. This resulted in a 30% increase in the collector performance.


Direct absorption collector




Thermomagnetic convection

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