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Analysis of a Lab-Scale Heat Transformation Demonstrator Based on a Gas-Solid Reaction

Stengler, Jana and Weiss, Julius and Linder, Marc (2019) Analysis of a Lab-Scale Heat Transformation Demonstrator Based on a Gas-Solid Reaction. Energies, 12 (2234). Multidisciplinary Digital Publishing Institute (MDPI). DOI: 10.3390/en12122234 ISSN 1996-1073

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Official URL: https://www.mdpi.com/1996-1073/12/12/2234


Heat transformation based on reversible chemical reactions has gained significant interest due to the high achievable output temperatures. This specific type of chemical heat pump uses a reversible gas-solid reaction, with the back and forward reactions taking place at different temperatures: by running the exothermic discharge reaction at a higher temperature than the endothermic charge reaction, the released heat is thermally upgraded. In this work, we report on the experimental investigation of the hydration reaction of strontium bromide (SrBr2) with regard to its use for heat transformation in the temperature range from 180 °C to 250 °C on a 1 kg scale. The reaction temperature is set by adjusting the pressure of the gaseous reactant. In previous experimental studies, we found the macroscopic and microscopic properties of the solid bulk phase to be subject to considerable changes due to the chemical reaction. In order to better understand how this affects the thermal discharge performance of a thermochemical reactor, we combine our experimental work with a modelling approach. From the results of the presented studies, we derive design rules and operating parameters for a thermochemical storage module based on SrBr2.

Item URL in elib:https://elib.dlr.de/127809/
Document Type:Article
Title:Analysis of a Lab-Scale Heat Transformation Demonstrator Based on a Gas-Solid Reaction
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Stengler, JanaJana.Stengler (at) dlr.dehttps://orcid.org/0000-0001-6124-8286
Weiss, Juliusjulius.weiss (at) dlr.deUNSPECIFIED
Linder, Marcmarc.linder (at) dlr.deUNSPECIFIED
Date:12 June 2019
Journal or Publication Title:Energies
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:Yes
DOI :10.3390/en12122234
Publisher:Multidisciplinary Digital Publishing Institute (MDPI)
Keywords:heat transformation; thermochemical reaction; chemical heat pump; thermal upgrade; gas-solid reaction
HGF - Research field:Energy
HGF - Program:Storage and Cross-linked Infrastructures
HGF - Program Themes:Thermal Energy Storage
DLR - Research area:Energy
DLR - Program:E SP - Energy Storage
DLR - Research theme (Project):E - Thermochemical Processes (Storage)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Thermal Process Technology
Deposited By: Stengler, Jana
Deposited On:12 Jul 2019 13:04
Last Modified:14 Dec 2019 04:24

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