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Advanced high temperature latent heat storage system - design and test results

Laing, Doerte and Bauer, Thomas and Steinmann, Wolf-Dieter and Lehmann, Dorothea (2009) Advanced high temperature latent heat storage system - design and test results. In: Effstock 2009, Abstract Book and Proceedings. Effstock 2009, 14.-17. Juni 2009, Stockholm. ISBN 978-91-976271-3-9.

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Abstract

Processes with a two-phase heat transfer fluid (e.g. water/steam) require isothermal energy storage. Latent heat storage systems are an option to fulfil this demand. For high temperature applications nitrate salts are suitable materials for phase change storage. The main drawback of these materials is the low thermal conductivity, limiting the power density during the charging/discharging process. At DLR the so called sandwich-concept has been developed to realize latent heat storage with high power densities for applications in solar thermal power plants and process industry. This concept has already been demonstrated successfully for three different storage units ranging from 2-100 kW at melting temperatures of 142 °C and 222 °C. In 2008, a test storage using sodium nitrate as phase change material (PCM) with a melting temperature of 306 °C was operated in a 5 kW laboratory loop. The designed heat transfer rate was achieved and after 172 cycles no degradation was observed.

Document Type:Conference or Workshop Item (Paper)
Title:Advanced high temperature latent heat storage system - design and test results
Authors:
AuthorsInstitution or Email of Authors
Laing, Doertedoerte.laing@dlr.de
Bauer, ThomasUNSPECIFIED
Steinmann, Wolf-DieterUNSPECIFIED
Lehmann, DorotheaUNSPECIFIED
Date:June 2009
Journal or Publication Title:Effstock 2009, Abstract Book and Proceedings
Refereed publication:No
In ISI Web of Science:No
ISBN:978-91-976271-3-9
Status:Published
Keywords:Latent heat storage, phase change material, high temperature
Event Title:Effstock 2009
Event Location:Stockholm
Event Type:international Conference
Event Dates:14.-17. Juni 2009
Organizer:Swedvac
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:E SF - Solar research (old)
DLR - Research area:Energy
DLR - Program:E SF - Solar research
DLR - Research theme (Project):E - Thermische Energiespeicher (old)
Location: Stuttgart
Institutes and Institutions:Institute of Technical Thermodynamics > Thermal Process Technology
Deposited By: Dörte Laing
Deposited On:04 Nov 2009 11:29
Last Modified:12 Dec 2013 20:40

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