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Electricity storage based on coupled thermochemical reactions: The Thermochemical Battery

Lutz, Michael and Schmidt, Matthias and Bürger, Inga and Linder, Marc Philipp (2020) Electricity storage based on coupled thermochemical reactions: The Thermochemical Battery. Journal of Energy Storage (102104). Elsevier. ISSN 2352-152X

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Official URL: https://doi.org/10.1016/j.est.2020.102104

Abstract

Thermochemical reactions are under investigation for a wide variety of applications. However, the system of two coupled gas-solid reactions exchanging both thermal energy and gas solely with each other has not been investigated yet. This approach allows realizing a compact thermochemical unit with two gas reservoirs at different pressure levels at approximately the same temperature. In this work, such a system is fundamentally analyzed and its technical potential as an energy storage component is investigated. While any two thermochemical gas-solid system can be used, this work exemplarily focusses on metal hydrides. Based on a thermodynamic analysis, it can be shown that the system is feasible, as the intrinsic difference in the reaction enthalpies of the metal hydrides can be compensated with heat integration of the compression unit. Following these findings, a thermochemical battery is investigated in more detail including an energetic analysis of efficiencies and potential storage densities. It is deduced that a higher pressure ratio between the hydrides yields in higher storage density but lower efficiency. Co-generation of cooling energy during discharging is feasible.

Item URL in elib:https://elib.dlr.de/139224/
Document Type:Article
Title:Electricity storage based on coupled thermochemical reactions: The Thermochemical Battery
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Lutz, Michaelmichael.lutz (at) dlr.deUNSPECIFIED
Schmidt, MatthiasTT-TPTUNSPECIFIED
Bürger, Ingainga.buerger (at) dlr.deUNSPECIFIED
Linder, Marc PhilippMarc.Linder (at) dlr.deUNSPECIFIED
Date:2020
Journal or Publication Title:Journal of Energy Storage
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Publisher:Elsevier
ISSN:2352-152X
Status:Published
Keywords:ydrogen storage Thermochemical heat storage Thermochemical battery Metal hydride Electricity storage
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Road Transport
DLR - Research area:Transport
DLR - Program:V ST Straßenverkehr
DLR - Research theme (Project):V - NGC Antriebssystem und Energiemanagement
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Thermal Process Technology
Deposited By: Bürger, Inga
Deposited On:07 Dec 2020 12:13
Last Modified:07 Dec 2020 12:13

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