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Experimental testing of various heat transfer structures in a flat plate thermal energy storage unit

Johnson, Maike and Fiss, Michael and Klemm, Torsten (2016) Experimental testing of various heat transfer structures in a flat plate thermal energy storage unit. AIP Conference Proceedings. American Institute of Physics (AIP). doi: 10.1063/1.4949120. ISSN 0094-243X.

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Official URL: http://dx.doi.org/10.1063/1.4949120


For solar process heat applications with steam as the working fluid and varying application parameters, a novel latent heat storage concept has been developed using an adaptation of a flat plate heat exchanger as the storage concept. Since the pressure level in these applications usually does not exceed 30 bar, an adaptation with storage material chambers arranged between heat transfer medium chambers is possible. Phase change materials are used as the storage medium, so that the isothermal evaporation of steam during discharging of the storage is paired with the isothermal solidification of the storage material. Heat transfer structures can be inserted into the chambers to adjust the power level for a given application. By combining the required number of flat plate heat exchanger compartments and inserting the appropriate heat transfer structure, the design can easily be adjusted for the required power level and capacity for a specific application. Within this work, the technical feasibility of this concept is proven. The dependence of the operating characteristics on the geometry of the heat exchanger is identified. A focus is on varying the power density by integrating conductive heat structures in the PCM.

Item URL in elib:https://elib.dlr.de/104633/
Document Type:Article
Title:Experimental testing of various heat transfer structures in a flat plate thermal energy storage unit
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Johnson, Maikemaike.johnson (at) dlr.deUNSPECIFIED
Fiss, Michaelmichael.fiss (at) dlr.deUNSPECIFIED
Date:May 2016
Journal or Publication Title:AIP Conference Proceedings
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
DOI :10.1063/1.4949120
Publisher:American Institute of Physics (AIP)
Keywords:Thermal energy storage, Phase change material, Latent heat, flat plate
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: Johnson, Maike
Deposited On:14 Jun 2016 11:55
Last Modified:19 Jan 2021 04:12

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