Thermodynamic study of the effect of partial thermal reduction of dysprosium oxide on solar-to-fuel energy conversion efficiency

FUEL

卷:278

Article

Bhosale, Rahul R.¹ 

[1] Qatar Univ, Coll Engn, Dept Chem Engn, Doha, Qatar

关键词: Dy2O3;    Hydrogen;    Water splitting;    Thermochemical;    Solar reactor;    Efficiency;   

DOI  :  10.1016/j.fuel.2020.118249

来源: Elsevier

【 摘 要 】

A thermodynamic equilibrium and efficiency analysis of the dysprosium oxide-based solar thermochemical H2O splitting (Dy-WS) cycle is conducted. The objective of this study is to understand the effect of partial thermal reduction (TR) of Dy2O3 on the solar-to-fuel energy conversion efficiency (eta(solar-to-fuel-Dy-WS)) of the Dy-WS cycle. The equilibrium analysis indicate a rise in the percentage TR of Dy2O3 (%TR-Dy) from 0.3% up to 100% when the T-R temperature (T-H) is increased from 2000 K to 2530 K. The upsurge in the TH yielded a considerable surge in the (Q)over dot(solar- reactor-Dy- WS) and (Q)over dot(solar-heater-Dy-WS). Overall results of this study showed that the eta(solar-to-fuel-Dy-WS) is amplified from 0.6% to 6.5% in three zones (slow zone, medium-fast zone, and fast zone) as the T-H is amplified from 2000 K up to 2280 K. A further rise in the T-H from 2280 K up to 2530 K resulted in a drop in the eta(solar-to-fuel-Dy-WS) from 6.5% to 3.5%. By employing the heat recuperation, the eta(solar-to-fuel-HR-Dy-WS) is improved further up to 11.4% (at T-H = 2280 K).

【 授权许可】

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