Experimental proof of concept of a pilot-scale thermochemical storage unit

Stefania Tescari*, Abhishek Singh, Lamark De Oliveira, Stefan Breuer, Christos Agrafiotis, Martin Roeb, Christian Sattler, Johnny Marcher, Chrysa Pagkoura, George Karagiannakis, Athanasios G. Konstandopoulos

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

3 Citations (Scopus)
3 Downloads (Pure)

Abstract

The present study presents installation and operation of the first pilot scale thermal storage unit based on thermochemical redox-cycles. The reactive core is composed of a honeycomb ceramic substrate, coated with cobalt oxide. This concept, already analyzed and presented at lab-scale, is now implemented at a larger scale: a total of 280 kg of storage material including 90 kg of cobalt oxide. The storage block was implemented inside an existing solar facility and connected to the complete experimental set-up. This experimental set-up is presented, with focus on the measurement system and the possible improvement for a next campaign. Start-up and operation of the system is described during the first complete charge-discharge cycle. The effect of the chemical reaction on the stored capacity is clearly detected by analysis of the temperature distribution data obtained during the experiments. Furthermore two consecutive cycles show no evident loss of reactivity inside the material. The system is cycled between 650°C and 1000°C. In this temperature range, the total energy stored was about 50 kWh, corresponding to an energy density of 630 kJ/kg. In conclusion, the concept feasibility was successfully shown, together with a first calculation on the system performance.

Original languageEnglish
Title of host publicationSolarPACES 2016
Subtitle of host publicationInternational Conference on Concentrating Solar Power and Chemical Energy Systems
PublisherAmerican Institute of Physics
ISBN (Electronic)9780735415225
DOIs
Publication statusPublished - 27 Jun 2017
Externally publishedYes
Event22nd International Conference on Concentrating Solar Power and Chemical Energy Systems, SolarPACES 2016 - Abu Dhabi, United Arab Emirates
Duration: 11 Oct 201614 Oct 2016
Conference number: 22

Publication series

NameAIP Conference Proceedings
Volume1850
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference22nd International Conference on Concentrating Solar Power and Chemical Energy Systems, SolarPACES 2016
Abbreviated titleSolarPACES 2016
CountryUnited Arab Emirates
CityAbu Dhabi
Period11/10/1614/10/16

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  • Cite this

    Tescari, S., Singh, A., De Oliveira, L., Breuer, S., Agrafiotis, C., Roeb, M., ... Konstandopoulos, A. G. (2017). Experimental proof of concept of a pilot-scale thermochemical storage unit. In SolarPACES 2016: International Conference on Concentrating Solar Power and Chemical Energy Systems [090006] (AIP Conference Proceedings; Vol. 1850). American Institute of Physics. https://doi.org/10.1063/1.4984455