Water Electrolysis Hydrogen Recirculation for Adsorption Renewal
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Solution Overview
Problem
Conventional water electrolysis systems face issues with energy loss and the inability to reuse hydrogen used for renewing adsorption cylinders, as the hydrogen pressure is reduced and cannot be circulated, leading to wasteful discharge outside the system.
Innovation Solution
A water electrolysis system that includes a water electrolysis stack, a dehumidification device, a compression device to increase hydrogen pressure, and a purge line that recirculates pressurized hydrogen back into the system, allowing it to be reused for renewing adsorption cylinders, thereby reducing energy loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If hydrogen pressure is reduced for adsorption cylinder renewal, then the adsorption cylinder can be renewed, but the hydrogen cannot be circulated and must be discharged outside the system
Solution Approach 1:
The patent implements a feedback mechanism by introducing a circulation line that returns the hydrogen from the adsorption cylinder renewal process back to the compression device. This allows the hydrogen to be re-compressed and reused in the electrolysis process, eliminating the need to discharge it outside the system and resolving the contradiction between cylinder renewal and hydrogen loss.
2Ease of manufacture
If hydrogen pressure is reduced and then increased again for adsorption unit renewal, then the adsorption unit can be renewed, but energy loss is increased
Solution Approach 1:
The patent maintains continuous useful action by keeping the hydrogen in a closed circulation loop. Instead of reducing pressure and then increasing it again (which causes energy loss), the hydrogen is continuously compressed and circulated through the system. The compression device operates continuously to maintain hydrogen at the required pressure, eliminating the energy-wasting pressure reduction and re-compression cycles.
3Ease of operation
If hydrogen is discharged outside the system after adsorption cylinder renewal, then the renewal process is simple, but hydrogen utilization efficiency is reduced
Solution Approach 1:
The patent applies multi-functionality by making the hydrogen circulation system serve multiple purposes: it enables adsorption cylinder renewal while simultaneously maintaining hydrogen utilization efficiency. The circulation line and compression device allow the same hydrogen to be used both for renewing the adsorption cylinders and for continuing the electrolysis process, eliminating the need to discharge hydrogen and improving overall system efficiency.
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 reduces energy loss by reusing hydrogen for cylinder renewal and prevents wasteful discharge, enhancing the efficiency of hydrogen utilization within the water electrolysis system.
Implementation Method 1
a water electrolysis stack (1) that electrolyzes water and generates hydrogen
Implementation Method 2
a dehumidification device (31) that adsorbs and removes moisture contained in the hydrogen generated by the water electrolysis stack (1)
Data Source
AI summary
A water electrolysis system includes a water electrolysis stack that electrolyzes water and generates hydrogen, a dehumidification device that adsorbs and removes moisture contained in the hydrogen generated by the water electrolysis stack, a wet line that supplies the hydrogen generated by the water electrolysis stack to the dehumidification device, a compression device that gradually increases pressure of the hydrogen whose moisture is removed in the dehumidification device, and a purge line that takes out a part of the hydrogen whose pressure is being increased, in the compression device, allows it to pass through the dehumidification device, and allows it to join the wet line.