Fiber-Optic Electrolyzer Cell Temperature Mapping in Harsh Fields
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Solution Overview
Problem
Conventional temperature measurement methods for multi-cell electrolyzers face challenges due to corrosive environments and strong electrical and magnetic fields, making it difficult to accurately monitor individual cell temperatures, which are critical for efficiency and safety, especially in hydrogen electrolyzers where flameless fires can occur.
Innovation Solution
A fiber-optic temperature sensor is used to measure temperatures at multiple intervals along a cable, allowing for the determination of individual cell temperatures by mapping these values to the cells, thereby overcoming the limitations of conventional methods with a single sensor probe.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional temperature sensors are used to monitor individual electrolyzer cells, then temperature measurement can be achieved, but the system becomes complex and costly due to the large number of sensors and processing hardware required
Solution Approach 1:
The patent merges multiple temperature measurement functions into a single fiber-optic cable that can simultaneously measure temperatures at multiple locations along the electrolyzer stack. The distributed temperature sensing capability of the fiber-optic cable eliminates the need for individual temperature sensors at each cell, reducing system complexity while maintaining measurement precision.
Solution Approach 2:
The fiber-optic cable serves multiple functions: it acts as both the measurement probe and the signal transmission medium for all temperature measurements along the electrolyzer. This universal component replaces the traditional approach requiring separate sensors, cables, and processing hardware for each measurement point.
2Reliability
If multiple temperature sensors are deployed to detect flames and monitor each cell, then safety and detection capability improve, but the cost and system complexity increase significantly
Solution Approach 1:
The fiber-optic cable combines multiple detection functions (temperature monitoring, flame detection) into a single integrated system. The distributed sensing capability allows the same cable to monitor temperatures at all cell locations and detect abnormal heat patterns indicative of flames or flameless fires, improving reliability without increasing sensor count.
Solution Approach 2:
The fiber-optic cable acts as an intermediary that safely transmits temperature and anomaly detection data from the harsh electrolyzer environment to the processing system. Its immunity to electrical interference and corrosive environments allows reliable operation where conventional sensors would fail, improving detection capability without requiring additional protective hardware.
3Measurement precision
If conventional temperature measurement methods are used in corrosive environments with strong electrical and magnetic fields, then temperature data can be obtained, but measurement accuracy and reliability deteriorate
Solution Approach 1:
The fiber-optic cable serves as an intermediary measurement medium that is immune to the harmful effects of corrosive environments and electromagnetic fields. By transmitting light rather than electrical signals, the system achieves accurate temperature measurements in environments where conventional electrical sensors would fail or provide inaccurate readings.
Solution Approach 2:
The patent replaces electrical-based temperature measurement systems with an optical-based fiber-optic system. This substitution eliminates susceptibility to electromagnetic interference and corrosion, as optical fibers are made of dielectric materials that do not conduct electricity or corrode in the harsh electrolyzer environment, thereby maintaining measurement 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
This approach enables comprehensive monitoring of individual electrolyzer cells with low effort and cost, supporting early detection of anomalies such as flameless fires, and is applicable to various electrolyzer configurations without requiring modifications to existing systems.
Implementation Method 1
fiber-optic temperature sensors use effects such as Raman scattering, Brillouin scattering, temperature-dependent interferometric properties, or temperature-dependent distributed optical reflection to determine temperature values
Implementation Method 2
fiber-optic temperature sensors use effects such as Raman scattering, Brillouin scattering, temperature-dependent interferometric properties, or temperature-dependent distributed optical reflection to determine temperature values
Implementation Method 3
fiber-optic temperature sensors use effects such as Raman scattering, Brillouin scattering, temperature-dependent interferometric properties, or temperature-dependent distributed optical reflection to determine temperature values
Implementation Method 4
fiber-optic temperature sensors use effects such as Raman scattering, Brillouin scattering, temperature-dependent interferometric properties, or temperature-dependent distributed optical reflection to determine temperature values
Data Source
Figure 1a~1d
Figure 1b
Figure 2
AI summary
Examples relate to a method, apparatus, and computer program for determining a measured temperature of a multi-cell electrolyzer, and to a system comprising such an apparatus and a fiber-optic temperature sensor. The method comprises obtaining (120) sensor information of a fiber-optic temperature sensor, wherein the sensor information comprises temperature values measured at a plurality of intervals of a fiber-optic cable used by the fiber-optic temperature sensor, and calculating (150), for each cell of the multi-cell electrolyzer, at least one temperature based on the temperature values measured at the plurality of intervals.