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Construction and Measurement of Thermochemical Pre-Heater based on Metal Hydrides for Fuel Cells in Vehicles

Uechitthaworn, Luksanawan (2018) Construction and Measurement of Thermochemical Pre-Heater based on Metal Hydrides for Fuel Cells in Vehicles. Master's, Hochschule Offenburg.

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Abstract

A proton exchange membrane fuel cell for automotive application is a most interesting technology for electric cars. It can generate electricity during driving but it has limitation of operating in winter time. It cannot run if at temperatures lower than freezing temperature of water. It causes a failure start up, which is a key factor for commercialisation. A heater is necessary to increase the temperature of the fuel cell to above 0 °C. A pre-heater using thermochemical conversion of the metal hydride LaNi4.85Al0.15 is developed. LaNi4.85Al0.15 is investigated under winter time conditions. The pre-heater is aimed to utilise the potential energy from hydrogen storage tank on board the vehicle to supply hydrogen to the pre-heater. The investigations were carried out at -20°C with variation pressure from 0.12 bar up to 4.2 bar. The results are LaNi4.85Al0.15 can produce thermal power up to 132 kW/kg of LaNi4.85Al0.15 at -20°C and 4.2 bar hydrogen supply pressure. The pre-heater is designed according to the fuel cell conditions and material characteristics to optimise heat transfer and integration to the fuel cell. The heat transfer optimisation preheater have advantage in good heat transfer surfaces and compact construction, while the integration pre-heater has advantage in versatile design and leakage protection.

Item URL in elib:https://elib.dlr.de/119409/
Document Type:Thesis (Master's)
Title:Construction and Measurement of Thermochemical Pre-Heater based on Metal Hydrides for Fuel Cells in Vehicles
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Uechitthaworn, LuksanawanUNSPECIFIEDUNSPECIFIED
Date:2018
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:fuel cell preheater, metal Hydride, cold start, thermomanagement, strat up, LaNi, pre-heater
Institution:Hochschule Offenburg
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:29 Mar 2018 15:32
Last Modified:29 Mar 2018 15:32

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