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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 (2015) Experimental Testing of Various Heat Transfer Structures in a Flat Plate Thermal Energy Storage Unit. In: Proceedings of the SolarPACES 2015 International Conference. IEA SolarPACES. SolarPACES2015, 13.-17- Okt. 2015, Cape Town, South Africa.

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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/101398/
Document Type:Conference or Workshop Item (Speech)
Title:Experimental Testing of Various Heat Transfer Structures in a Flat Plate Thermal Energy Storage Unit
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Johnson, Maikemaike.johnson (at) dlr.deUNSPECIFIED
Fiß, Michaelmichael.fiss (at) dlr.deUNSPECIFIED
Date:14 October 2015
Journal or Publication Title:Proceedings of the SolarPACES 2015 International Conference
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Publisher:IEA SolarPACES
Keywords:Flat plate, PCM, latent heat, energy storage
Event Title:SolarPACES2015
Event Location:Cape Town, South Africa
Event Type:international Conference
Event Dates:13.-17- Okt. 2015
Organizer:IEA SolarPACES
HGF - Research field:Energy
HGF - Program:Storage and Cross-linked Infrastructures
HGF - Program Themes:Thermal Energy Storage
DLR - Research area:Energy
DLR - Program:E EV - Energy process technology
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:12 Jan 2016 08:20
Last Modified:10 May 2016 23:39

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