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Systematic Concept Study of Brayton Batteries for Coupled Generation of Electricity, Heat, and Cooling

Krüger, Michael (2024) Systematic Concept Study of Brayton Batteries for Coupled Generation of Electricity, Heat, and Cooling. Applied Sciences. Multidisciplinary Digital Publishing Institute (MDPI). doi: 10.3390/app14146073. ISSN 2076-3417.

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Abstract

This study presents a systematic analysis of Brayton batteries using Ebsilon Professional simulations. Over 200,000 concept configurations were evaluated, with less than 1% proving physically feasible. The research aimed to assess electricity generation; coupled generation of electricity and heat; coupled generation of electricity and cooling; and coupled generation of electricity, heat, and cooling, all with or without waste heat integration. Efficiency ranged from 20% to 50% for electricity generation alone, with higher efficiencies at a compressor discharge temperature of 625 °C compared to 450 °C. Co-generation improved the overall efficiency, although at the expense of power efficiency. Notably, simultaneous electricity, heat, and cooling generation solutions were absent within the study's parameters. Lead concepts, predominantly air-based systems with or without charging line recuperators and heat exchange at various stages, were identified. These will undergo detailed dynamic system simulations, focusing on thermal energy storage. Comparison with the existing literature was limited due to differing parameters and topologies, highlighting the value of this systematic analysis in identifying optimal solutions.

Item URL in elib:https://elib.dlr.de/205350/
Document Type:Article
Title:Systematic Concept Study of Brayton Batteries for Coupled Generation of Electricity, Heat, and Cooling
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Krüger, MichaelUNSPECIFIEDhttps://orcid.org/0000-0002-2187-8678UNSPECIFIED
Date:12 July 2024
Journal or Publication Title:Applied Sciences
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI:10.3390/app14146073
Publisher:Multidisciplinary Digital Publishing Institute (MDPI)
ISSN:2076-3417
Status:Published
Keywords:Brayton batteries; thermal energy storage; TES; Ebsilon Professional; system simulation; power generation; waste heat integration; concept analysis
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: Krüger, Michael
Deposited On:09 Aug 2024 12:59
Last Modified:09 Aug 2024 13:37

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