Electrolyzer Ageing Monitoring with Reference Curve Fitting
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Solution Overview
Problem
Monitoring the ageing of electrolyzers on an industrial scale is challenging due to the need for precise operating conditions and the constraint of comparing operating voltages over time, which is difficult to achieve in fluctuating real-world conditions.
Innovation Solution
A method involving the recording of measurement values over time, selecting reference points to fit a mathematical function, determining an ageing coefficient, and comparing future measurements with predicted values to issue indications based on tolerance criteria, allowing for continuous electrolysis monitoring without production schedule constraints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If direct comparison of operating voltage at identical conditions is performed, then measurement precision of ageing is improved, but productivity is worsened due to production schedule constraints
Solution Approach 1:
The patent transforms the monitoring approach from requiring identical operating conditions to using varying conditions with mathematical correction. By changing the parameters from fixed identical conditions to variable conditions with compensation functions, the system achieves both measurement precision and production flexibility simultaneously
Solution Approach 2:
The patent introduces mathematical functions as intermediaries between the measured operating voltage and the ageing assessment. These functions compensate for variations in operating conditions, allowing accurate ageing monitoring without requiring direct comparison at identical conditions, thus resolving the contradiction between precision and productivity
2Productivity
If operating voltage is monitored under varying conditions, then productivity is improved by removing production constraints, but measurement precision deteriorates due to non-identical operating conditions
Solution Approach 1:
The patent implements a feedback mechanism where operating conditions (temperature, current density, time) are continuously measured and fed into mathematical functions that correct the voltage measurements. This feedback loop ensures that variations in operating conditions are compensated, maintaining measurement precision while allowing flexible production scheduling
Solution Approach 2:
The system accepts varying operating parameters and uses mathematical transformations to normalize their effect on the ageing assessment. By changing from fixed parameter comparison to dynamic parameter compensation, the system achieves both productivity improvement and measurement precision
3Measurement precision
If electrolyzer is operated at precise operating point for extended periods, then measurement precision is improved, but loss of time increases due to production schedule constraints
Solution Approach 1:
The patent enables continuous monitoring during normal production operations rather than requiring separate dedicated measurement periods. The mathematical functions allow ageing assessment to be performed continuously on regular operational data, eliminating the need to stop production for monitoring and thus reducing time loss while maintaining precision
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
Enables effective monitoring of electrolyzer ageing with reduced constraints on production schedules, providing insights into the ageing process and enabling timely maintenance, thus improving operational efficiency and productivity.
Implementation Method 1
The invention is directed to a method for performing electrolysis. In particular, the described invention is directed to monitoring the ageing of an electrolyzer.
Data Source
Figure 1~2
Figure 3
AI summary
Method for performing an electrolysis with an electrolysis installation (1), comprising a) recording a respective measurement value (5) of the electrolysis for multiple points of time (6), b) from the points of time (6) used in step a), selecting multiple reference points of time (7), which define a reference period (8), c) fitting a mathematical function (10) to the measurement values (5) recorded in step a) for the reference points of time (7) selected in step b), d) performing at least one of the following sub-steps: d1) from the mathematical function (10) obtained in step c), determining an ageing coefficient that is a measure of the ageing of the electrolysis installation (1), d2) recording a respective measurement value (15) of the electrolysis for at least one point of time (16) that lies after the reference period (8), comparing this measurement value (15) with a corresponding value calculated with the mathematical function (10) obtained in step c) and issuing an indication in case a result of this comparison violates a tolerance criterion.