期刊
RENEWABLE ENERGY
卷 136, 期 -, 页码 23-32出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.renene.2018.12.095
关键词
Direct absorption collector; CFD; Multiphase; Nanofluid; Thermomagnetic convection
资金
- Russian Science Foundation [17-79-10481]
- Russian Science Foundation [17-79-10481] Funding Source: Russian Science Foundation
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. (C) 2018 Elsevier Ltd. All rights reserved.
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