Parallel Cell Groups in Electrochemical Reactors
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Solution Overview
Problem
In electrochemical reactors, malfunctions such as wire disconnection in some cells can lead to a decrease in the purification rate of exhaust gas, as the NOX purification process is compromised when affected cells fail to operate normally.
Innovation Solution
The electrochemical reactor is designed with multiple groups of cells, where each group has cells with ion-conducting solid electrolyte layers, anode, and cathode layers exposed to passages, and these groups are connected in parallel to ensure continuous exhaust gas purification even if some cells malfunction. Cells within each group are at least partially connected in series, and corresponding groups share solid electrolyte layers or are joined through spacers to maintain functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cells are arranged in parallel groups with all exhaust gas flowing into passages defined by each group and both anode and cathode layers exposed to each passage, then the purification rate is maintained even when some cells malfunction, but the device complexity increases
Solution Approach 1:
The electrochemical reactor is divided into multiple groups of cells, where each group is configured to independently process exhaust gas. Each group contains cells with both anode and cathode layers exposed to the same passage, allowing the system to segment the purification function across multiple independent units. This segmentation ensures that if one group fails, others continue operating, maintaining overall purification rate.
Solution Approach 2:
The system is designed with redundant cell groups that serve as backup capacity. By configuring multiple groups where all exhaust gas can flow through passages defined by each group, the system prepares in advance for potential cell failures. This prior cushioning ensures that functional groups can compensate for malfunctioning groups, preventing purification rate decrease before it occurs.
2Power
If multiple groups of cells are connected in parallel to the power source, then the required power source capacity is reduced, but the wiring complexity increases
Solution Approach 1:
The electrical system is segmented into multiple parallel circuits, each supplying power to a specific cell group. This segmentation allows the power source capacity to be distributed across multiple lower-power circuits rather than requiring one large high-power circuit, reducing the overall power source capacity requirement while managing wiring complexity through modular organization.
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
This configuration maintains a consistent purification rate of exhaust gas by allowing current to flow through functional cells, even if some cells malfunction, and reduces the required capacity of the power source and wiring, ensuring efficient NOX reduction to N2 without significant decreases in purification efficiency.
Implementation Method 1
each cell having an ion conducting solid electrolyte layer
Implementation Method 2
NOX is reduced to N2 on the cathode layers and purified
Data Source
AI summary
An electrochemical reactor is arranged inside an exhaust passage of an internal combustion engine and is provided with a plurality of groups of cells. Each group of cell has a plurality of cells, each cell has an ion conducting solid electrolyte layer, and an anode layer and cathode layer arranged on a surface of the solid electrolyte layer. Each group of cells is configured so that all of the exhaust gas flows into passages defined by cells configuring the group of cells and so that both of the anode layers and the cathode layers are exposed to each passage. The plurality of groups of cells are arranged aligned in a direction of flow of exhaust gas and different groups of cells are connected to a power source in parallel with each other.