Particle circulation loops in solar energy capture and storage: Gas–solid flow and heat transfer considerations

Abstract : A novel application of powders relies on their use as heat transfer medium for heat capture, conveying and storage. The use of powders as heat transfer fluid in concentrated solar systems is discussed with respect to current technologies. The specific application reported upon is the use of powder loops in Solar Power Tower plants. In the proposed receiver technology, SiC powder is conveyed as a dense particle suspension through a multi-tube solar receiver in a bubbling fluidization mode, the upwards flow being established by pressurizing the powder feed. Tests were conducted with a single-tube receiver unit at the 1 MW solar furnace of CNRS (Odeillo Font-Romeu, F). The measured wall-to-suspension heat transfer coefficient is a function of operating temperature, applied air velocity and imposed solid circulation flux: values increased with increasing solids flux from ∼430 to 1120 W/m2 K. Empirical approaches and a heat transfer model were applied to compare experimental and predicted values of the heat transfer coefficient, with a fair agreement obtained. The research moreover provides initial data concerning the overall economy of the system. The high temperature of the circulating powder leads to an increased power cycle efficiency, an increased storage density, reduced thermal power requirements, reduced heliostat field size, reduced parasitic power consumption and increased plant capacity factor.
Type de document :
Article dans une revue
Applied Energy, Elsevier, 2016, 161, pp.Pages 206-224. 〈10.1016/j.apenergy.2015.10.005〉
Liste complète des métadonnées

https://hal-univ-perp.archives-ouvertes.fr/hal-01315754
Contributeur : Olivier Savoyat <>
Soumis le : vendredi 13 mai 2016 - 16:43:38
Dernière modification le : jeudi 11 janvier 2018 - 06:22:15

Identifiants

Collections

Citation

Huili Zhang, Hadrien Benoit, Daniel Gauthier, Jan Degrève, Jan Baeyens, et al.. Particle circulation loops in solar energy capture and storage: Gas–solid flow and heat transfer considerations. Applied Energy, Elsevier, 2016, 161, pp.Pages 206-224. 〈10.1016/j.apenergy.2015.10.005〉. 〈hal-01315754〉

Partager

Métriques

Consultations de la notice

90