Packed-bed thermal storage for concentrated solar power - Pilot-scale demonstration and industrial-scale design

Zanganeh, Giw and Pedretti, Andrea and Zavattoni, Simone and Barbato, Maurizio and Steinfeld, Aldo (2012) Packed-bed thermal storage for concentrated solar power - Pilot-scale demonstration and industrial-scale design. Solar Energy, 86 (10). pp. 3084-3098. ISSN 0038-092X

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Abstract

A thermal energy storage system, consisting of a packed bed of rocks as storing material and air as high-temperature heat transfer fluid, is analyzed for concentrated solar power (CSP) applications. A 6.5 MWhth pilot-scale thermal storage unit immersed in the ground and of truncated conical shape is fabricated and experimentally demonstrated to generate thermoclines. A dynamic numerical heat transfer model is formulated for separate fluid and solid phases and variable thermo-physical properties in the range of 20–650 °C, and validated with experimental results. The validated model is further applied to design and simulate an array of two industrial-scale thermal storage units, each of 7.2 GWhth capacity, for a 26 MWel round-the-clock concentrated solar power plant during multiple 8 h-charging/16 h-discharging cycles, yielding 95% overall thermal efficiency.

Item Type:	Scientific journal article, Newspaper article or Magazine article
Additional Information:	cited By (since 1996)16
Uncontrolled Keywords:	Packed bed; Solar thermal storage; Concentrated solar power; CSP; Sensible heat; Air
Subjects:	Thechnologies > Others in technology > Energy technologies
Department/unit:	Dipartimento tecnologie innovative > Istituto di ingegneria meccanica e tecnologia dei materiali
Depositing User:	Maurizio Barbato
Date Deposited:	18 Jan 2016 09:40
Last Modified:	27 Jul 2016 05:30
URI:	http://repository.supsi.ch/id/eprint/7054

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