Hydrogen Generator Electrolyte Flow and Bubble Removal
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Solution Overview
Problem
Hydrogen generator systems using mixed hydrogen and oxygen co-generation by electrolysis face issues such as electrolyte solution displacement, bubble blinding, and overheating due to overpotential between cell plates, which affect performance.
Innovation Solution
A hydrogen gas generator system with a reactor stack and separator/reservoir configuration that includes a pump to recirculate the electrolyte solution at high velocity, larger apertures to facilitate flow, and sealing spacers to enhance gas bubble removal and reduce current leakage, along with a cooling loop to manage heat.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If electrolyte solution is pumped at high velocity through the reactor stack, then gas bubble removal is improved and bubble-blinding is reduced, but device complexity increases due to the need for a pump and larger apertures
Solution Approach 1:
The electrolyte solution serves dual purposes: as an electrolyte for the electrochemical reaction and as a fluid medium for heat transfer and bubble removal. The system uses its own operating fluid (electrolyte solution) to accomplish multiple functions including cooling and bubble displacement, rather than requiring separate systems for each function.
Solution Approach 2:
The electrolyte solution performs multiple functions simultaneously: it conducts electricity for hydrogen generation, removes heat from the cell plates, and displaces gas bubbles from the electrode surfaces. The pump system that circulates the electrolyte provides both flow for bubble removal and heat management in a single integrated circulation loop.
2Temperature
If electrolyte solution is circulated through the reactor stack, then heat management is improved, but energy consumption increases due to the pumping requirement
Solution Approach 1:
The system uses hydraulic principles by circulating the electrolyte solution through the reactor stack to transfer heat. The pump creates hydraulic flow that moves the electrolyte through the cell plates, utilizing fluid dynamics to achieve heat management without requiring complex thermal management systems.
Solution Approach 2:
The electrolyte solution acts as an intermediary heat transfer medium between the cell plates (where heat is generated) and the external environment (where heat is dissipated). The pump circulates this intermediary fluid through the system, enabling indirect heat removal while maintaining separation between the electrochemical reaction zone and the thermal management system.
3Speed
If larger apertures are used in electrode plates, then electrolyte flow is improved and bubble removal is enhanced, but manufacturing precision requirements increase
Solution Approach 1:
The system changes the physical parameters of the electrode plates by incorporating larger apertures that allow for pumped flow of electrolyte solution. This parameter change enables sufficient flow velocity to break gas bubbles loose from electrode surfaces while maintaining structural integrity and manufacturability.
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 significantly reduces bubble-blinding issues, improves heat management, and enhances electrolysis efficiency by maintaining a uniform electrolyte flow and reducing current leakage, leading to improved performance and efficiency.
Implementation Method 1
pumping the electrolyte solution around the integrated generator system improved performance by improving the displacement of the bubbles
Implementation Method 2
separating generated gasses from the electrolyte solution in the separator
Implementation Method 3
reactor stack adapted to perform electrolysis on an electrolyte solution
Data Source
AI summary
A hydrogen gas generator system comprises a reactor stack adapted to perform electrolysis on water in an electrolyte solution, the reactor stack comprising a plurality of spaced apart electrode plates and electrolyte solution disposed between the plates, each plate having an upper outlet aperture and a lower inlet aperture to allow movement of electrolyte solution across the plates. A separator is configured to receive a mixture of gas and electrolyte solution from a top of the reactor stack and separate the gas from the electrolyte solution. A gas outlet configured to remove gas from the separator, and an electrolyte solution inlet configured to return electrolyte solution from the separator to a bottom of the reactor stack. The system comprises a pump configured to pump electrolyte solution in a circuit from the electrolyte solution outlet of the separator/reservoir, through the reactor stack at velocity, and back to the separator/reservoir, and in which in the upper and lower apertures are sufficiently large to allow pumped flow through the reactor stack.