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

JavaScript is disabled on your browser. Please enable JavaScript to use all the features on this page.

Highlights

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%.

Abstract

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.

Keywords

Direct absorption collector

CFD

Multiphase

Nanofluid

Thermomagnetic convection

© 2018 Elsevier Ltd. All rights reserved.

Be the first to comment

Leave a Reply

Your email address will not be published.


*