Hydrogen Delivery Humidity Control in Water Electrolysis
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Solution Overview
Problem
Existing water electrolysis systems face issues with humidity control and path blocking due to condensed water formation, especially in low-temperature environments, affecting the efficiency and reliability of hydrogen gas delivery to compression devices.
Innovation Solution
Incorporating a dehumidifier to remove water vapor from hydrogen gas, a humidifier to adjust humidity levels, and a delivery path with a branch return system to maintain dry conditions, ensuring controlled humidity and preventing condensation in the system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If hydrogen gas is delivered through a delivery path in low-temperature environments, then the hydrogen gas can be transported to the compression device, but condensed water may be generated in the delivery path causing path blockage
Solution Approach 1:
The system performs preliminary dehumidification of hydrogen gas before it enters the delivery path, removing excess water vapor that would otherwise condense in low-temperature environments and cause path blockage
Solution Approach 2:
A dehumidifier is introduced as an intermediary device between the gas-liquid separator and the delivery path to remove water vapor from hydrogen gas, preventing condensation and ensuring reliable transport
2Reliability
If the hydrogen gas is dehumidified to prevent condensation, then path blockage is suppressed, but the humidity of hydrogen gas introduced into the compression device may not be appropriately controlled
Solution Approach 1:
The system uses feedback control where humidity sensors monitor the humidity of hydrogen gas at different stages, and the dehumidifier and humidifier adjust their operation based on this feedback to maintain appropriate humidity levels
Solution Approach 2:
The system dynamically adjusts the degree of dehumidification and subsequent humidification based on real-time humidity measurements, allowing flexible control of hydrogen gas humidity to match compression device requirements
3Reliability
If a dehumidifier and humidifier are added to control humidity, then path blockage is prevented and humidity is controlled, but the system complexity increases
Solution Approach 1:
The dehumidifier and humidifier are integrated into the existing hydrogen gas processing system, serving multiple functions: preventing path blockage, controlling humidity for compression device protection, and maintaining overall system reliability
Solution Approach 2:
The dehumidification and humidification processes are merged into a coordinated system where the dehumidifier removes excess moisture and the humidifier restores appropriate humidity levels, with both devices controlled by a unified control strategy
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 system effectively suppresses path blockage and maintains appropriate humidity levels, enhancing the efficiency and reliability of hydrogen gas delivery to compression devices, even in low-temperature conditions.
Implementation Method 1
a gas-liquid separator configured to perform gas-liquid separation of a mixed fluid of hydrogen gas and water
Implementation Method 2
a dehumidifier configured to dehumidify the hydrogen gas separated from the mixed fluid by the gas-liquid separator
Implementation Method 3
a humidifier configured to humidify the hydrogen gas delivered through the delivery path
Implementation Method 4
a water electrolysis device configured to electrolyze water
Data Source
AI summary
A water electrolysis system includes: a water electrolysis device for electrolyzing water; a gas-liquid separator for performing gas-liquid separation of a mixed fluid of hydrogen gas and water, the mixed fluid being led out from the water electrolysis device; a dehumidifier for dehumidifying the hydrogen gas separated from the mixed fluid by the gas-liquid separator; a delivery path for delivering the hydrogen gas dehumidified by the dehumidifier; a humidifier for humidifying the hydrogen gas delivered through the delivery path; and a compression device for compressing the hydrogen gas humidified by the humidifier.