Reliability of liquid organic hydrogen carrier‐based energy storage in a mobility application

Liquid organic hydrogen carriers (LOHC) are a technology that allows storing hydrogen in a safe and dense manner by reversible chemical conversion. They constitute a very promising option for energy storage, transport, and release combined with electric power generation by fuel cells in large‐scale...

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Bibliographic Details
Published in:Energy science & engineering 2020-06, Vol.8 (6), p.2044-2053
Main Authors: Uhrig, Felix, Kadar, Julian, Müller, Karsten
Format: Article
Language:English
Subjects:
Boundary conditions
Component reliability
Electric power
Electric power generation
Energy
Energy storage
energy system analysis
Failure analysis
Failure modes
Fault tree analysis
Fuel cells
Fuel technology
Heat exchangers
Heat transfer
Hydrogen
hydrogen storage
Hydrogen-based energy
Nuclear fuels
Power supply
Redundancy
Redundant components
Reliability analysis
resilience
risk assessment
Sensors
System reliability
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Summary:Liquid organic hydrogen carriers (LOHC) are a technology that allows storing hydrogen in a safe and dense manner by reversible chemical conversion. They constitute a very promising option for energy storage, transport, and release combined with electric power generation by fuel cells in large‐scale applications like trains. In order to establish trains running on LOHC, it is mandatory to ensure the reliability of the system. This study evaluates various system configurations concerning reliability and resilience. The fault tree analysis method has been used to quantify the probability of failure. The S‐P matrix was applied to assess the different failure modes in context of severity as well as their probability. The MTTF of the system can be more than doubled by introducing single redundancy for the fuel cell and the reactor, while more than two redundant components diminish the positive effect on reliability due to higher complexity. It is estimated that the systems full functionality is available for more than 97% of its operating time. Especially for new technologies, reliability is usually unknown, but of high interest. The reliability of liquid organic hydrogen carrier‐based energy storage has been evaluated on the example of a railway system. Conclusions on reliability as well as on approaches for enhancing it are drawn.
ISSN:2050-0505
2050-0505
DOI:10.1002/ese3.646