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Natural convection melting in a high temperature flat plate latent heat storage system: Parameter study of enclosure dimensions

Vogel, Julian and Felbinger, Jonina and Johnson, Maike (2016) Natural convection melting in a high temperature flat plate latent heat storage system: Parameter study of enclosure dimensions. INNOSTORAGE 2016: Advances in Thermal Energy Storage, 16.-18.02.2016, Be'er-Sheva, Israel.

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Abstract

The impact of natural convection melting in a high temperature flat plate latent heat thermal energy storage system is studied numerically. The storage material is the eutectic mixture of sodium nitrate and potassium nitrate (KNO3-NaNO3). A parameter study on storage material enclosure dimensions is conducted for various widths and heights. Low to very high aspect ratios between 0.5 and 40 and Rayleigh numbers from 1.2·10^4 to 1.6·10^6 are obtained. The liquid phase fraction evolution with time is scaled to non-dimensional form and the impact of natural convection on the heat flux is shown with a convective enhancement factor that is the ratio of heat flux to a hypothetical heat flux only by conduction. The results can be used for future design optimizations considering the effect of natural convection.

Item URL in elib:https://elib.dlr.de/103277/
Document Type:Conference or Workshop Item (Speech)
Title:Natural convection melting in a high temperature flat plate latent heat storage system: Parameter study of enclosure dimensions
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Vogel, Julianjulian.vogel (at) dlr.deUNSPECIFIED
Felbinger, JoninaUNSPECIFIEDUNSPECIFIED
Johnson, Maikemaike.johnson (at) dlr.deUNSPECIFIED
Date:16 February 2016
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:High temperature flat plate latent heat storage, Phase change material (PCM), Melting and solidification, Natural Convection, Rectangular enclosures, Numerical Simulation
Event Title:INNOSTORAGE 2016: Advances in Thermal Energy Storage
Event Location:Be'er-Sheva, Israel
Event Type:international Conference
Event Dates:16.-18.02.2016
Organizer:Ben-Gurion University of the Negev
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: Vogel, Julian
Deposited On:03 Mar 2016 09:49
Last Modified:31 Jul 2019 20:00

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