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Experimental validation of a hybrid power-to-heat storage based on high temperature phase change materials to enhance sector coupling and flexibility

Royo, Patricia and David, Nele and Johnson, Maike and Fiß, Michael and López-Sabirón, Ana María and Ferreira, Germán and Bauer, Dan (2020) Experimental validation of a hybrid power-to-heat storage based on high temperature phase change materials to enhance sector coupling and flexibility. IRES, 22.-23.- Mai 2020, Düsseldorf, Germany / Online.

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Abstract

An innovative power-to-heat storage (electric charging, thermal discharging) is proposed to increase the flexibility, sector coupling and manageability of renewable generation systems. The hybrid thermal energy storage (TES) system integrating phase change materials (PCM) is designed based on flat pillow plates in combination with heating rods. The prototype is validated by means of experimental testing to characterize its electrical and thermal. In this sense, a parametric analysis is proposed involving different charging and discharging control strategies. The proposed hybrid-TES provides a total storage capacity of 4.87 kWh integrating nitrate salts as PCM (eutectic mixture of KNO3 and NaNO3). Depending on the charging/discharging strategy, the charging efficiency is 65-90% and the discharging period could be reduced by more than 1h. Active control of the heating rod temperature reduces the charging period by half, enabling a high flexibility of the storage system. This reveals the PCM-TES potential to contribute in decision-making for an optimal energy management in the renewable energy and industry context.

Item URL in elib:https://elib.dlr.de/135398/
Document Type:Conference or Workshop Item (Speech)
Title:Experimental validation of a hybrid power-to-heat storage based on high temperature phase change materials to enhance sector coupling and flexibility
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Royo, Patriciaproyo (at) fcirce.esUNSPECIFIED
David, NeleNele.David (at) dlr.deUNSPECIFIED
Johnson, MaikeMaike.Johnson (at) dlr.dehttps://orcid.org/0000-0002-1903-9955
Fiß, Michaelmichael.fiss (at) dlr.deUNSPECIFIED
López-Sabirón, Ana Maríaamlopezs (at) unizar.esUNSPECIFIED
Ferreira, Germángermanf (at) unizar.esUNSPECIFIED
Bauer, DanDan.Bauer (at) dlr.deUNSPECIFIED
Date:May 2020
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:power-to-heat, thermal energy storage, phase change materials, flexibility, system integration flexibility, renewable energy penetration
Event Title:IRES
Event Location:Düsseldorf, Germany / Online
Event Type:international Conference
Event Dates:22.-23.- Mai 2020
Organizer:EuroSolar
HGF - Research field:Energy
HGF - Program:Storage and Cross-linked Infrastructures
HGF - Program Themes:Thermal Energy Storage
DLR - Research area:Energy
DLR - Program:E SP - Energy Storage
DLR - Research theme (Project):E - Thermochemical Processes (Storage)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Thermal Process Technology
Deposited By: Johnson, Maike
Deposited On:11 Dec 2020 16:36
Last Modified:11 Dec 2020 16:36

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