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Evaluation of the scraping forces in active latent heat thermal energy storages

Tombrink, Jonas and Egea Villarreal, Alberto and Gutierrez Rojas, Andrea Lucia (2023) Evaluation of the scraping forces in active latent heat thermal energy storages. Eurotherm Seminar #116 - Innovative solutions for thermal energy storage deployment, 24.-26. Mai 2023, Lleida, Spanien. doi: 10.21001/eurotherm.seminar.116.2023.

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Low-cost Phase Change Materials (PCM) usually have a low thermal conductivity. During the discharge process, solidified PCM on the heat transfer surface acts as a thermal insulator, resulting in a reduction of the heat transfer between the PCM and the heat transfer fluid, thus the discharge power is reduced as the PCM solidifies. In active latent heat thermal energy storages (ALHTES), the solidified PCM layer is mechanically removed from the heat transfer surface by a scraper to maximize the heat transfer. In this study, this parasitic mechanical energy is quantified experimentally for the first time to optimize the design of future ALHTES. The required scraping force is measured for decanoic acid and paraffin, resulting in a value between 150 and 350 N*m-1 depending on the angle of the scraper.

Item URL in elib:https://elib.dlr.de/195674/
Document Type:Conference or Workshop Item (Speech)
Title:Evaluation of the scraping forces in active latent heat thermal energy storages
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Tombrink, JonasUNSPECIFIEDhttps://orcid.org/0000-0002-8600-1236UNSPECIFIED
Gutierrez Rojas, Andrea LuciaUNSPECIFIEDhttps://orcid.org/0000-0002-6313-8264UNSPECIFIED
Date:24 May 2023
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 208-211
Keywords:Active Latent Heat Thermal Energy Storage, Phase Change Material, Heat Exchanger, Solidification
Event Title:Eurotherm Seminar #116 - Innovative solutions for thermal energy storage deployment
Event Location:Lleida, Spanien
Event Type:international Conference
Event Dates:24.-26. Mai 2023
HGF - Research field:Energy
HGF - Program:Materials and Technologies for the Energy Transition
HGF - Program Themes:High-Temperature Thermal Technologies
DLR - Research area:Energy
DLR - Program:E SP - Energy Storage
DLR - Research theme (Project):E - Thermochemical Processes
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Thermal Process Technology
Deposited By: Tombrink, Jonas
Deposited On:30 Jun 2023 14:07
Last Modified:30 Jun 2023 14:07

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