Water Electrolysis Apparatus Uniform Flow Field Design
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Solution Overview
Problem
Existing water electrolysis apparatuses face inefficiencies in distributing water evenly into the water flow field due to varying pressure losses across different grooves, leading to uneven water flow rates and inefficient electrolysis processes.
Innovation Solution
The apparatus features a water flow field with water channels and inlet joint channels oriented at specific angles and distances to minimize pressure losses, ensuring uniform water distribution across the flow field, using complementary distances between water supply and discharge passages and employing arcuate inlet buffers with angled inlet joint channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If water is supplied through conventional flow fields with parallel grooves, then water can be delivered to the electrolysis cells, but pressure losses vary across different grooves causing uneven water distribution
Solution Approach 1:
The patent applies local quality by varying the cross-sectional areas of different water supply channels. Channels closer to the water supply passage have smaller cross-sectional areas while channels farther away have larger cross-sectional areas. This local variation in channel geometry compensates for the different distances from the water supply source, equalizing the pressure losses across all channels and achieving uniform water distribution.
Solution Approach 2:
The patent changes the geometric parameters of the water supply channels, specifically the cross-sectional area, to optimize water distribution. By adjusting the cross-sectional area parameter according to the channel's position (distance from water supply passage), the system compensates for pressure loss variations and achieves uniform water flow rates across all channels.
2Device complexity
If parallel grooves are used for water flow, then the structure is simple, but water flow rates differ across grooves due to varying distances from supply and discharge points
Solution Approach 1:
The patent maintains the simple parallel groove structure but introduces local quality variations by adjusting the cross-sectional area of each groove based on its position. This allows the system to retain structural simplicity while achieving uniform water distribution through localized geometric modifications.
3Productivity
If through holes are positioned close to discharge points, then hydrogen discharge is efficient, but water supply pressure loss increases for distant channels
Solution Approach 1:
The patent changes the cross-sectional area parameter of water supply channels to compensate for pressure losses. Channels that are farther from the water supply passage (and thus experience higher pressure losses) are given larger cross-sectional areas, while channels closer to the supply passage have smaller cross-sectional areas. This parameter adjustment equalizes the pressure losses across all channels.
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 reduces pressure losses and ensures uniform water distribution, enhancing the efficiency of the water electrolysis process by maintaining consistent water flow rates across all channels.
Implementation Method 1
The water electrolysis apparatus employ a solid polymer electrolyte membrane for decomposing water to generate hydrogen (and oxygen)
Implementation Method 2
The hydrogen ions move through the solid polymer electrolyte membranes to the cathodes
Data Source
AI summary
A water electrolysis apparatus includes an anode separator having a water flow field held in fluid communication with a water supply passage and a discharge passage. The water flow field includes a plurality of water channels, an arcuate inlet buffer, and an arcuate outlet buffer. The water channels have respective ends connected to the arcuate inlet buffer through respective inlet joint channels. The inlet joint channels are oriented at an angle of 90 degrees or greater with respect to respective tangential lines at the ends of the inlet joint channels which are connected to the arcuate inlet buffer.