Electrochemical Hydrogen Compression With Membrane Wet-State Control
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Solution Overview
Problem
Conventional electrochemical hydrogen compression systems face inefficiencies due to uneven distribution of the wet state in the electrolyte film, leading to potential blockages and reduced proton conductivity, which affects the overall energy efficiency and operation of the device.
Innovation Solution
An electrochemical hydrogen compression system that includes a control device to regulate the discharge of hydrogen based on the wet state of the electrolyte film, using a humidifier and distribution pipelines to maintain a uniform wet state across unit cells, ensuring optimal proton conductivity and energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dew point regulator is provided to adjust the dew point of mixed gas, then the possibility that proton conductivity is lowered and gas flow path is blocked is reduced, but the device complexity increases
Solution Approach 1:
The patent extracts the dew point regulator from the system and replaces it with a simpler flow rate control mechanism. By controlling the flow rate of hydrogen gas through the electrolyte film, the system maintains adequate wetting without requiring complex dew point adjustment equipment, thus reducing device complexity while maintaining reliability
Solution Approach 2:
The system uses the hydrogen gas flow itself to maintain the wet state of the electrolyte film. The flowing hydrogen gas provides the necessary moisture through self-humidification, eliminating the need for external dew point regulation equipment and achieving reliable operation through the system's own operational parameters
2Reliability
If the flow rate of hydrogen gas is increased to maintain wet state, then proton conductivity is improved, but energy consumption increases
Solution Approach 1:
The patent optimizes the flow rate parameter of hydrogen gas to achieve the minimum necessary flow to maintain adequate wetting of the electrolyte film. By carefully controlling this parameter rather than using high flow rates, the system maintains good proton conductivity while minimizing energy consumption associated with gas compression and flow
3Ease of operation
If the wet state of electrolyte film is not controlled, then device operation is simpler, but distribution of wet state becomes uneven leading to reduced efficiency
Solution Approach 1:
The system incorporates monitoring of the wet state distribution in the electrolyte film and uses this feedback to adjust the hydrogen gas flow rate. This ensures uniform wetting across the electrolyte film, maintaining high compression efficiency while requiring minimal operational intervention, thus balancing ease of operation with productivity
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 variations in the wet state of the electrolyte film, maintaining a good wet state and reducing power consumption, thereby operating the electrochemical hydrogen compression device with high efficiency and accommodating compressed hydrogen gas up to 100 MPa.
Implementation Method 1
the electrolyte film is required to be in a wet state in order to secure good proton conductivity of the electrolyte film
Implementation Method 2
The electrochemical hydrogen compression device includes an electrolyte film, an anode electrode and a cathode electrode provided on two surfaces of the electrolyte film, and a current regulator adjusting the amount of a current flowing between the anode electrode and the cathode electrode
Implementation Method 3
the possibility that the gas flow path is blocked by condensed water due to the condensation of water vapor in the mixed gas
Data Source
AI summary
An electrochemical hydrogen compression system includes a hydrogen gas compression part that compresses hydrogen by applying a current between an anode and a cathode provided on two surfaces of a proton exchange film, and a supply pipeline that guides hydrogen discharged from a hydrogen supply source to the hydrogen gas compression part. The hydrogen gas compression part has an outlet for discharging unreacted hydrogen. The electrochemical hydrogen compression system further includes a film resistance meter and a voltmeter that acquire information related to a wet state of the proton exchange film, a fourth opening/closing part and a fifth opening/closing part that regulate discharge of hydrogen from the outlet, and a control device that controls the fourth opening/closing part and the fifth opening/closing part. The control device controls the fourth opening/closing part and the fifth opening/closing part based on at least the wet state of the proton exchange film.