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Open and closed metal hydride system for high thermal power applications: Preheating vehicle components

Dieterich, Mila and Bürger, Inga and Linder, Marc Philipp (2017) Open and closed metal hydride system for high thermal power applications: Preheating vehicle components. International Journal of Hydrogen Energy, 42 (16), pp. 11469-11481. Elsevier. DOI: 10.1016/j.ijhydene.2017.03.024 ISSN 0360-3199

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Abstract

a bstra ct Many vehicle components operate at temperatures above ambient conditions. At cold start, most of the pollutants are produced and lifespan is reduced. Thermochemical energy storage with high power density could prevent these disadvantages. In order to investigate achievable power densities of a thermochemical energy storage at technically relevant boundary conditions, a laboratory scale device using metal hydrides (LaNi4.85Al0.15 and C5®) is designed and preheating operation modes (open and closed) are analyzed. The impact of the ambient temperature (from ?20 to þ20 ?C), a s well as other influencing factors on the thermal power output such as heat transfer flow rate, regeneration temperature and pressure conditions are investigated. The experiments proved the suitability of the reactor design and material selection for the considered application boundary conditions. For the coupled reaction (closed system), the ambient temperature has the greatest influence on the thermal power with decreasing values for lower temperatures. Here, values between 0.6 kW/kgMH at ambient temperature of ?20 ?C and 1.6 kW/kgMH at 20 ?C, at otherwise same conditions, were reached. If hydrogen can be supplied from a pressure tank (open system), the supply pressure in relation to equilibrium pressure at the considered ambient tem- perature has to be large enough for high thermal power. At ?20 ?C, 1.4 kW/kgMH at a supply pressure of 1.5 bar and 5.4 kW/kgMH at a hydrogen pressure of 10 bar were reached.

Item URL in elib:https://elib.dlr.de/112883/
Document Type:Article
Title:Open and closed metal hydride system for high thermal power applications: Preheating vehicle components
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Dieterich, MilaMila.Dieterich (at) dlr.deUNSPECIFIED
Bürger, Ingainga.buerger (at) dlr.deUNSPECIFIED
Linder, Marc PhilippMarc.Linder (at) dlr.deUNSPECIFIED
Date:2017
Journal or Publication Title:International Journal of Hydrogen Energy
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:42
DOI :10.1016/j.ijhydene.2017.03.024
Page Range:pp. 11469-11481
Publisher:Elsevier
ISSN:0360-3199
Status:Published
Keywords:Thermochemical energy storage; metal hydrides; high power; cold start; coupled chemical reaction
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Terrestrial Vehicles (old)
DLR - Research area:Transport
DLR - Program:V BF - Bodengebundene Fahrzeuge
DLR - Research theme (Project):V - NGC-Energiemanagement (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Thermal Process Technology
Deposited By: Dieterich, Mila
Deposited On:12 Jul 2017 09:06
Last Modified:31 Jul 2019 20:10

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