SOEC/SOFC Containment Enclosure With Integrated Heating Uniformity
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Solution Overview
Problem
Existing high-temperature electrochemical devices face inefficiencies due to non-uniform heating, thermal stress, and gas distribution issues, leading to reduced performance and potential damage, particularly in solid oxide electrolyser (SOEC) and fuel cell (SOFC) systems.
Innovation Solution
An electrochemical device with an integrated heating system and a containment chamber that conforms to the shape of the unit, using resistive filaments and gas circulation ducts for enhanced thermal efficiency and uniform heating, along with a high-temperature tight coupling system for gas feed and outlet, to improve thermal performance and reduce external losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If external heating is used for high-temperature electrochemical devices, then the device can reach operating temperature, but the heating is non-uniform causing thermal stress and reduced performance
Solution Approach 1:
The heating system is merged with the containment chamber structure, where heating elements are integrated into the chamber walls that directly surround the electrochemical stack. This integration ensures uniform thermal distribution across all components while maintaining structural coherence, eliminating the thermal stress issues caused by external non-uniform heating.
Solution Approach 2:
A heat transfer fluid circulates through ducts formed in the containment chamber walls, acting as an intermediary between the heat source and the electrochemical stack. This fluid mediator ensures uniform heat distribution to all surfaces of the stack, preventing thermal stress and maintaining compositional stability during operation.
2Loss of energy
If heating power is increased to improve thermal efficiency, then operating temperature is maintained, but energy consumption increases
Solution Approach 1:
The heating system is integrated into the containment chamber structure, allowing direct thermal coupling with the electrochemical stack. This merger eliminates intermediate heat transfer losses and enables precise thermal control, maintaining high thermal efficiency without requiring excessive heating power.
Solution Approach 2:
Temperature sensors monitor the thermal state of the electrochemical stack and provide feedback to the heating system control. This feedback mechanism adjusts heating power dynamically to maintain optimal operating temperature, preventing energy waste from overheating while ensuring thermal efficiency is maintained.
3Device complexity
If gas distribution system is simplified, then device complexity is reduced, but gas distribution uniformity and tight coupling deteriorate
Solution Approach 1:
The containment chamber serves multiple functions: it provides structural enclosure, integrates heating elements, contains gas distribution ducts, and ensures tight sealing. This multi-functionality reduces the need for separate dedicated components, simplifying the overall device while maintaining reliable gas distribution through the integrated duct system.
Solution Approach 2:
The gas distribution system is segmented into separate ducts within the containment chamber walls, with dedicated pathways for different gases. This segmentation ensures proper gas distribution and tight coupling without requiring complex external piping, maintaining reliability while keeping the overall structure simplified and integrated.
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 solution enhances thermal efficiency, achieves better heating uniformity, and reduces the power required for heating, thereby improving the overall performance and longevity of the electrochemical device.
Implementation Method 1
heating means configured to provide the heating of the electrochemical unit and integrated in said unit
Implementation Method 2
the containment chamber further comprising a heat-insulating material
Implementation Method 3
Each elementary electrochemical cell comprises an electrolyte 210e interposed between an anode 210a and a cathode 210c
Implementation Method 4
the electrolyte enables the transport of ions from the cathode to the anode
Data Source
AI summary
The invention relates to an electrochemical device that includes an electrochemical unit. The electrochemical unit includes a stack of SOEC/SOFC-type solid oxides operating at high temperatures, a clamping system provided with two clamping plates, referred to as the first clamping plate and second clamping plate, respectively, between which the stack is clamped, one and/or both of the two clamping plates having at least one gas inlet and at least one gas outlet. The unit includes heating means which are designed to ensure the heating of the electrochemical unit and are integrated into said unit. The device includes a containment box, housed in a volume, referred to as internal volume V, the electrochemical unit, the internal volume V being delimited by a surface, referred to as the internal surface S, of the containment box, which follows the shape of the electrochemical assembly.