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A metal hydride air-conditioning system for fuel cell vehicles — Functional demonstration

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 — Functional demonstration. Applied Energy, 259, p. 114187. Elsevier. doi: 10.1016/j.apenergy.2019.114187. ISSN 0306-2619.

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Official URL: https://doi.org/10.1016/j.apenergy.2019.114187


High pressure storage of hydrogen is the established storage technology for automotive systems. However, around 15% of the lower heating value of hydrogen is spent to compress hydrogen up to the pressure of 700 bar. Since this energy is available on board but so far wasted, an open air-conditioning system based on metal hydrides is promising to reutilize this compression work. Here we present the experimental demonstration of a first of its kind system. The setup consists of two alternately operating plate reactors, each filled with around 1.5 kg of Hydralloy C2 (Ti0.98Zr0.02V0.41Fe0.09Cr0.05Mn1.46), coupled to a polymer electrolyte membrane fuel cell. The demonstration at an electrical power of 5 kW shows that the fuel cell operation is not affected by the alternately H2 desorbing reactors (half-cycle duration of 150 s). The system’s average cooling power was 662 W for an ambient temperature of 30 °C and a cooling temperature of 20 °C, reaching of specific cooling power of 227 W kgMH −1 . Related to the maximum obtainable cooling power of 18.3% of the electrical fuel cell power, the cooling efficiency corresponds to 75%. As an innovative hydrogen pressure transducer the presented system can be transferred to all applications where an unused hydrogen pressure difference is available.

Item URL in elib:https://elib.dlr.de/130860/
Document Type:Article
Title:A metal hydride air-conditioning system for fuel cell vehicles — Functional demonstration
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Nasri, MounirUNSPECIFIEDhttps://orcid.org/0000-0002-0626-482XUNSPECIFIED
Linder, Marc PhilippUNSPECIFIEDhttps://orcid.org/0000-0003-2218-5301UNSPECIFIED
Bürger, IngaUNSPECIFIEDhttps://orcid.org/0000-0002-6091-0431UNSPECIFIED
Date:27 November 2019
Journal or Publication Title:Applied Energy
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:p. 114187
Keywords:Metal hydrides Hydrogen Fuel cell vehicles Air-conditioning
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 (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Thermal Process Technology
Institute of Vehicle Concepts
Deposited By: Bürger, Inga
Deposited On:17 Dec 2019 16:51
Last Modified:23 Oct 2023 13:13

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