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A metal hydride air-conditioning system for fuel cell vehicles – Performance investigations

Weckerle, Christoph and Nasri, Mounir and Hegner, Robert and Linder, Marc Philipp and Bürger, Inga (2019) A metal hydride air-conditioning system for fuel cell vehicles – Performance investigations. Applied Energy, 256, p. 113957. Elsevier. doi: 10.1016/j.apenergy.2019.113957. ISSN 0306-2619.

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An open cooling system based on metal hydrides is a promising new technology to reutilize the compression work in a hydrogen pressure tank by generating heat or cold. Our first of its kind system consists of two alternately operating plate reactors, which are filled with around 1.5 kg of Hydralloy C2 (Ti Zr V Fe Cr Mn 0.98 0.02 0.41 0.09 0.05 1.46) and coupled to a polymer electrolyte membrane fuel cell. In the present study, an extensive performance investigation for a variation of the main influencing parameters is performed: The electrical fuel cell power and the operating temperatures. Overall, it can be observed that in the entire range of various operating conditions, the fuel cell operation is not affected by the alternately operating H2 desorbing reactors. The variation of the electrical fuel cell power between 1.8 and 7.9 kW results in a maximum average cooling power of 807 W at an electrical power of 7 kW, reaching a specific cooling power of 276 W kgMH-1 . The systems performance decreases with rising ambient temperatures (varied in the range: 24.3–42.3 °C) and decreasing cooling temperatures (varied in the range: 13–25.4 °C) due to increased thermal losses and reduced halfcycle times. Concluding the parameter variations, optimization recommendations are given and the expected performance for an improved system design is derived.

Item URL in elib:https://elib.dlr.de/130859/
Document Type:Article
Title:A metal hydride air-conditioning system for fuel cell vehicles – Performance investigations
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Weckerle, ChristophChristoph.Weckerle (at) dlr.deUNSPECIFIED
Nasri, MounirMounir.Nasri (at) dlr.dehttps://orcid.org/0000-0002-0626-482X
Hegner, RobertRobert.Hegner (at) dlr.deUNSPECIFIED
Linder, Marc PhilippMarc.Linder (at) dlr.deUNSPECIFIED
Bürger, Ingainga.buerger (at) dlr.deUNSPECIFIED
Journal or Publication Title:Applied Energy
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1016/j.apenergy.2019.113957
Page Range:p. 113957
Keywords:metal hydrides, air-conditioning, sorption system, cooling system, fuel cell vehicles
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Road Transport
DLR - Research area:Transport
DLR - Program:V ST Straßenverkehr
DLR - Research theme (Project):V - NGC Antriebssystem und Energiemanagement
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Thermal Process Technology
Institute of Vehicle Concepts > Vehicle Energy Concepts
Deposited By: Bürger, Inga
Deposited On:05 Dec 2019 13:31
Last Modified:05 Dec 2019 13:31

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