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Separation of Power and Capacity In latent Heat Energy Storage

Pointner, Harald and Steinmann, Wolf-Dieter and Eck, Markus and Bachelier, Camille (2015) Separation of Power and Capacity In latent Heat Energy Storage. Energy Procedia, 69, pp. 997-1005. Elsevier. doi: 10.1016/j.egypro.2015.03.189. ISSN 1876-6102.

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Official URL: http://www.sciencedirect.com/science/article/pii/S1876610215004956


The state-of-the-art latent heat energy storage system is equipped with aluminum fins at the heat exchanger pipes in order to compensate the low thermal conductivity of the phase change material (PCM). The necessary amount of fins is directly coupled to the capacity of the storage system, what makes larger systems expensive. The PCMflux concept is developed in order to realize both a controllable and a possibly more cost effectivelatent heat storage system. These aims are addressed by separating the storage material from the heat exchanger. As a result, the PCM can be moved over the heat exchanger. The PCM thereby is macroencapsulated into containers. These pass the heat exchanger while the PCM inside changes phase. In order to improve thermal contact between containers and heat exchanger, Hitec® as an intermediate fluid is used to avoid poor dry contact. In this article,an experimental setup is described to examine the heat transfer through thin layers of molten Hitec®. The results of the experiments show an increased heat transfer by a factor of 9.9. This improves feasibility of the PCMflux concept significantly.

Item URL in elib:https://elib.dlr.de/96689/
Document Type:Article
Title:Separation of Power and Capacity In latent Heat Energy Storage
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Pointner, Haraldharald.pointner (at) dlr.deUNSPECIFIED
Steinmann, Wolf-Dieterwolf.steinmann (at) dlr.deUNSPECIFIED
Eck, Markusmarkus.eck (at) dlr.deUNSPECIFIED
Bachelier, CamilleNovatec Solar GmbHUNSPECIFIED
Journal or Publication Title:Energy Procedia
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
DOI :10.1016/j.egypro.2015.03.189
Page Range:pp. 997-1005
Keywords:Latent heat storage; Phase Change Materials; Separation of power and capacity; Heat transfer through fluid layer; Moving PCM
HGF - Research field:Energy
HGF - Program:Efficient Energy Conversion and Use (old)
HGF - Program Themes:Energy-efficient Processes (old)
DLR - Research area:Energy
DLR - Program:E EV - Energy process technology
DLR - Research theme (Project):E - Thermochemical Processes (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Thermal Process Technology
Deposited By: Pointner, Harald
Deposited On:27 Jul 2015 14:14
Last Modified:06 Sep 2019 15:22

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