Fuel Battery Module Layout for Stable Organic Hydride Dehydrogenation
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Solution Overview
Problem
Existing fuel batteries using organic hydrides as a heat source face challenges in efficiently utilizing high-temperature heat for endothermic reactions and stabilizing hydrogen supply, particularly when heat fluctuations occur due to varying electricity generation.
Innovation Solution
A fuel battery module and device configuration that includes a combustion unit to combust unreacted fuel, a first reactor for dehydrogenation of organic hydrides, and a second reactor for steam reforming, along with heat exchangers and a storage unit to manage and recover dehydrogenation products, ensuring stable hydrogen supply and efficient heat utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If organic hydrides are used as a heat source for endothermic reactions in fuel batteries, then hydrogen can be produced through dehydrogenation, but heat fluctuations occur due to varying electricity generation which destabilizes hydrogen supply
Solution Approach 1:
The patent combines a fuel battery stack with a dehydrogenation reactor into an integrated system where the fuel battery serves dual purposes: generating electricity and providing heat for dehydrogenation reactions. This merging allows the system to self-regulate temperature and stabilize hydrogen supply by using the fuel battery's own operational heat for the endothermic dehydrogenation process.
Solution Approach 2:
The system dynamically adjusts operational parameters including temperature, flow rates, and power generation levels to maintain stable hydrogen supply despite varying electricity generation demands. The fuel battery operates at optimized temperatures that simultaneously enable efficient power generation and sustained dehydrogenation reactions.
2Productivity
If high-temperature heat is used for endothermic dehydrogenation reactions, then hydrogen production efficiency increases, but system complexity increases due to additional reactors and heat management components
Solution Approach 1:
The fuel battery stack and dehydrogenation reactor are merged into a single integrated unit, eliminating the need for separate heat management systems and reducing overall system complexity. The fuel battery serves as both power generator and heat source for dehydrogenation, removing redundant components.
Solution Approach 2:
The fuel battery is designed to perform multiple functions simultaneously: electricity generation, heat provision for dehydrogenation, and hydrogen production. This multi-functionality reduces the need for additional dedicated components and simplifies the overall system architecture.
3Loss of energy
If unreacted fuel is combusted to generate heat, then energy utilization efficiency improves, but temperature control becomes more difficult leading to potential overheating
Solution Approach 1:
The system incorporates feedback control mechanisms where the fuel battery's electrical output and thermal state are continuously monitored and adjusted. This feedback loop prevents overheating by regulating combustion of unreacted fuel based on real-time temperature and power generation conditions.
Solution Approach 2:
The fuel battery system is designed to self-regulate its thermal state by using its own operational parameters to control the dehydrogenation process. The system automatically balances heat generation from fuel combustion with heat consumption in dehydrogenation reactions, maintaining stable temperatures without external intervention.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The configuration enables stable electricity generation by utilizing high-temperature heat for endothermic reactions, homogenizing temperature distribution, and recovering dehydrogenation products for hydrogen storage and transportation, enhancing power generation efficiency and simplifying the system.
Implementation Method 1
a combustion unit housed in the container and configured to combust unreacted fuel, from the fuel battery, supplied thereto along a flow path for an exhaust gas containing the unreacted fuel
Implementation Method 2
a first reactor housed in the container, positioned opposite the combustion unit, and configured to produce at least hydrogen and a dehydrogenation product from an organic hydride through a dehydrogenation reaction
Data Source
AI summary
A fuel battery module includes a container, a fuel battery, a combustion unit, and a first reactor. The fuel battery supplies unreacted fuel to the combustion unit along a flow path for an exhaust gas containing the unreacted fuel. The combustion unit combusts the unreacted fuel. The first reactor is positioned opposite the combustion unit. The first reactor produces at least hydrogen and a dehydrogenation product from an organic hydride through a dehydrogenation reaction.