SOEC Core Modular Design with Recuperating Space
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Solution Overview
Problem
Existing Solid Oxide Electrolysis Cell (SOEC) stacks face challenges in optimizing process gas utilization, reducing parasitic loss, enhancing electrical efficiency, and minimizing degradation due to high current densities, while also dealing with the inefficiencies and downtime associated with large-scale stack replacement.
Innovation Solution
The SOEC core design comprises a plurality of SOEC stack modules, thermal insulation, and a recuperating space to minimize heat loss and maximize thermal energy recovery. This design allows for modular operation, enabling individual cores to be isolated and serviced without shutting down the entire plant, and utilizes a recuperating fluid to pre-heat process fluids, thereby improving efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a large-scale SOEC stack is used to maximize production, then productivity is improved, but maintenance downtime increases and reliability deteriorates because the entire plant must be shut down for servicing
Solution Approach 1:
The SOEC plant is divided into multiple independent core modules, each containing its own SOEC stack. This segmentation allows individual cores to be maintained or replaced without shutting down the entire plant, as other cores can continue operating independently. The core shell design with removable ends facilitates this modular maintenance approach.
2Loss of energy
If thermal insulation is added to reduce heat loss, then energy efficiency is improved, but device complexity increases due to additional insulation layers and recuperating spaces
Solution Approach 1:
The thermal insulation structure is merged with the core shell design, where the insulation layer and recuperating space are integrated into the overall core architecture. This combination approach reduces the number of separate components while achieving both heat retention and energy recovery functions simultaneously.
Solution Approach 2:
The heat that would otherwise be lost through the core shell is converted into a beneficial resource by creating a recuperating space that captures and recycles this thermal energy. The insulation structure that prevents heat loss is simultaneously used to create a space for heat recovery, turning a potential waste stream into a useful resource for preheating process gases.
3Productivity
If the SOEC stack operates at high current density to maximize production, then productivity is improved, but electrical efficiency deteriorates due to increased parasitic losses and degradation
Solution Approach 1:
Process gases are preheated using heat recovered from the exhaust gases before entering the SOEC stack. This preliminary heating action reduces the energy demand during electrolysis, allowing the system to operate at high current densities with improved overall electrical efficiency by reducing parasitic heating losses.
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 SOEC core design effectively reduces heat loss, minimizes downtime, and enhances overall efficiency by recuperating thermal energy and allowing for modular maintenance, thus addressing the limitations of traditional large-scale SOEC stack configurations.
Implementation Method 1
inner hot zone thermal insulation
Implementation Method 2
recuperating fluid path
Data Source
AI summary
An SOEC core comprising a plurality of SOEC stacks has a recuperating space, recuperating heat energy lost from a hot zine of the SOEC core.