Electrolyzer Pressure Isolation for High-Pressure Oxygen Output
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Solution Overview
Problem
Existing electrolyzer systems are limited by pressure-sensitive components, such as the electrolyzer stack, which restrict the maximum oxygen output pressure, hindering downstream applications like gas treatment and oxygen storage.
Innovation Solution
The electrolyzer system incorporates a pressure reducer to reduce pressure upstream of the electrolyzer, a pre-stack pump to regulate pressure to the electrolyzer, and a post-stack pump to increase pressure downstream, with pressure isolating components to maintain acceptable pressures within the system, allowing for higher oxygen output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If pressure-sensitive components like the electrolyzer stack are used, then the system can operate reliably, but the maximum oxygen output pressure is restricted
Solution Approach 1:
The system divides the pressure management into separate zones: a first pump increases pressure upstream of the electrolyzer stack, while a second pump (post-stack pump) increases pressure downstream of the stack. This segmentation allows the stack to operate at moderate pressures while the final oxygen output achieves high pressure, resolving the contradiction between component reliability and high output pressure capability.
Solution Approach 2:
The electrolyzer stack acts as an intermediary component that operates at moderate pressure levels, while the post-stack pump serves as a mediator to boost the pressure of the oxygen-rich stream after it leaves the stack. This intermediary approach allows the stack to remain reliable while enabling high-pressure oxygen output for downstream applications.
2Stress or pressure
If additional compression equipment is added to increase oxygen pressure, then downstream applications are enabled, but device complexity increases
Solution Approach 1:
The system merges the pressure increase function into the existing fluid circulation path by incorporating pumps that simultaneously handle water circulation and oxygen pressurization. The first pump serves both water supply and pressure regulation, while the second pump handles both water-oxygen mixture circulation and final oxygen pressurization, reducing the need for separate compression equipment.
Solution Approach 2:
The pumps in the system perform multiple functions: the first pump provides water circulation, pressure regulation, and contributes to oxygen pressurization, while the second pump provides fluid circulation, pressure increase, and serves as a pressure barrier. This multi-functionality reduces the need for dedicated compression equipment and simplifies the overall system.
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 enables significantly higher oxygen output pressure suitable for downstream applications, such as sewage treatment, while protecting pressure-sensitive components, reducing the need for additional compression.
Implementation Method 1
an electrolyzer configured to generate a water-oxygen mixture from the water
Implementation Method 2
a pressure reducer configured to reduce pressure of the water upstream of the of the electrolyzer
Implementation Method 3
a post-stack pump configured to increase pressure of the water-oxygen mixture downstream of the electrolyzer
Data Source
AI summary
Systems and methods for increased oxygen output from an electrolyzer system are provided. The electrolyzer system includes a water storage tank. The electrolyzer system also includes an electrolyzer in fluid communication with the water storage tank and configured to produce oxygen and hydrogen from water e.g., (H2O). The electrolyzer system also includes one or more pressure isolating components configured to increase the oxygen output pressure of the system by pressure isolating the water storage tank from the electrolyzer stack.