Electrochemical Hydrogen Pump Pressure Control
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Solution Overview
Problem
The efficiency of hydrogen pressurization in electrochemical hydrogen pumps is compromised due to the reversal of gas pressure relationships between the anode and cathode, leading to increased contact resistance and reduced efficiency during the start of hydrogen pressurization actions.
Innovation Solution
A hydrogen supply system that adjusts the pressure of the cathode flow path to be higher than the anode flow path before the hydrogen pressurization action begins, using a pressure adjuster and controller to maintain optimal pressure relationships and prevent peeling and adherence issues between membrane layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the electrochemical hydrogen pump starts hydrogen pressurization action without pre-adjusting pressure, then the system structure remains simple, but the contact resistance increases and pressurization efficiency decreases
Solution Approach 1:
The patent applies preliminary action by adjusting the pressure of the cathode flow path to be higher than the anode flow path before the hydrogen pressurization action starts. This pre-pressure adjustment prevents membrane peeling and adherence issues during startup, maintaining optimal contact between membrane layers and ensuring high pressurization efficiency from the beginning of operation.
2Reliability
If the pressure of cathode flow path is not adjusted before pressurization, then the operation process is simple, but peeling between membrane layers occurs reducing reliability
Solution Approach 1:
The controller automatically adjusts the cathode flow path pressure to exceed anode flow path pressure before pressurization begins, preventing membrane peeling and adherence. This preliminary pressure adjustment ensures reliable membrane layer contact throughout the pressurization process without requiring complex manual intervention.
Solution Approach 2:
The system uses a controller to monitor and adjust the pressure relationship between cathode and anode flow paths, ensuring the cathode pressure remains higher than anode pressure before pressurization. This feedback control mechanism maintains optimal membrane contact conditions and prevents peeling issues during operation.
3Productivity
If pressure adjustment is performed before pressurization action, then contact resistance is reduced and efficiency is maintained, but additional pressure adjustment equipment is required
Solution Approach 1:
The voltage applicator in the electrochemical hydrogen pump serves multiple functions: it not only applies voltage to drive the pressurization process but also works in conjunction with the pressure adjuster to control the pressure relationship between cathode and anode flow paths. This multi-functionality reduces the need for entirely separate control systems.
Solution Approach 2:
The pressure adjuster acts as an intermediary component that modifies the pressure conditions in the cathode flow path before pressurization begins. By introducing this intermediate pressure control element, the system achieves optimal membrane contact and pressurization efficiency without requiring complete system redesign.
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 approach maintains high efficiency of the hydrogen pressurization action by reducing contact resistance and preventing peeling between membrane layers, ensuring consistent performance and extended pump life.
Implementation Method 1
an electrochemical hydrogen pump that includes an electrolyte membrane, an anode which is provided to a first main surface of the electrolyte membrane, an anode flow path which is provided on the anode and through which hydrogen flows, a cathode which is provided to a second main surface of the electrolyte membrane, a cathode flow path which is provided on the cathode and through which hydrogen flows, and a voltage applicator which applies a voltage between the anode and the cathode, pressurizes and sends hydrogen which is supplied to the anode via the anode flow path to the cathode by applying a voltage by the voltage applicator
Data Source
AI summary
A hydrogen supply system includes: an electrochemical hydrogen pump including an electrolyte membrane, an anode and a cathode provided to a first and second main surfaces of the electrolyte membrane, respectively, an anode flow path and cathode flow path through which hydrogen flows, and a voltage applicator applying a voltage between the anode and cathode, pressurizing and sending hydrogen supplied to the anode via the anode flow path to the cathode by applying a voltage by the voltage applicator, and supplying the pressurized hydrogen in the cathode flow path to a hydrogen reservoir; a pressure adjuster adjusting a cathode flow path pressure; and a controller controlling the pressure adjuster and making the cathode flow path pressure higher than an anode flow path pressure before starting a hydrogen pressurization action for pressurizing and supplying hydrogen supplied to the anode flow path to the cathode flow path.