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Experimental Results of a 1 kW Heat Transformation Demonstrator based on a Gas-Solid Reaction

Stengler, Jana and Fischer, Eva and Weiss, Julius and Linder, Marc (2018) Experimental Results of a 1 kW Heat Transformation Demonstrator based on a Gas-Solid Reaction. Heat Powered Cycles Conference 2018, 16.-19. Sept. 2018, Bayreuth, Deutschland.

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Heat transformation based on reversible chemical reactions has gained significant interest due to the high achievable output temperatures. These chemical heat pumps use a reversible gas-solid reaction in which the back and forward reaction take place at different temperatures: by running the discharge reaction at a higher temperature than the loading reaction, the released heat is thermally upgraded. In this work, we report on the experimental investigation of a salt hydrate with regard to its use for heat transformation in the temperature range from 180 °C to 300 °C on a 1 kW scale. The reaction temperature is set by adjusting the pressure of the gaseous reactant, water vapor, in a range from 1 kPa up to 0.6 MPa. In our prior experimental studies, we found the properties of the solid bulk phase to be subject to considerable changes due to the chemical reaction: amongst others, the particle size distribution shifts, resulting in agglomeration and altered bulk permeability. In order to better understand how this affects the thermal performance of a thermochemical reactor, we combine our experimental work with a modelling approach. Our current work includes the development of a reactor concept that allows handling gas-solid reactions at high specific thermal powers as well as an easy scale-up for industrial applications.

Item URL in elib:https://elib.dlr.de/121962/
Document Type:Conference or Workshop Item (Speech)
Title:Experimental Results of a 1 kW Heat Transformation Demonstrator based on a Gas-Solid Reaction
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Stengler, JanaJana.Stengler (at) dlr.dehttps://orcid.org/0000-0001-6124-8286
Fischer, Evaeva.fischer (at) dlr.deUNSPECIFIED
Weiss, Juliusjulius.weiss (at) dlr.deUNSPECIFIED
Linder, Marcmarc.linder (at) dlr.deUNSPECIFIED
Date:17 September 2018
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Heat Transformation, Thermochemical Reaction, Chemical Heat Pump, Thermal Upgrade, Gas-Solid Reaction
Event Title:Heat Powered Cycles Conference 2018
Event Location:Bayreuth, Deutschland
Event Type:international Conference
Event Dates:16.-19. Sept. 2018
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) (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Thermal Process Technology
Deposited By: Stengler, Jana
Deposited On:19 Oct 2018 09:41
Last Modified:19 Oct 2018 09:41

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