Parallel Steam Electrolyser and Heater Configuration
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Solution Overview
Problem
Existing steam electrolyser systems for hydrogen production are complex and require additional control mechanisms for temperature regulation, especially when operating with intermittent renewable power sources, which can lead to inefficiencies and increased system complexity.
Innovation Solution
A steam electrolysis system with a parallel arrangement of steam electrolyser cells and electric steam generators, allowing independent adjustment of operating points without additional control elements, utilizing electrically heated air and incorporating a gas moving device for hydrogen extraction, and optionally an auxiliary gas heater for simplified temperature management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If additional control mechanisms are introduced for temperature regulation in steam electrolyser systems, then temperature control precision is improved, but device complexity increases
Solution Approach 1:
The patent implements self-service by using the electrolyser system's own Joule heat generation to regulate its temperature. The system automatically adjusts its thermal state through the electrochemical reactions and electrical resistance inherent in its operation, eliminating the need for external heating or cooling mechanisms. This resolves the contradiction by achieving temperature control without adding device complexity.
Solution Approach 2:
The patent converts the harmful effect of Joule heat losses (thermal energy wasted due to electrical resistance) into a beneficial temperature regulation mechanism. By utilizing the heat generated during electrolysis to maintain optimal operating temperature, the system transforms what was previously considered energy waste into a useful thermal control feature, improving temperature precision without requiring additional control devices.
2Use of energy by moving object
If external heat supply mechanisms are added to maintain thermal-neutral voltage, then electrolysis efficiency is improved, but device complexity increases
Solution Approach 1:
The system achieves self-service by maintaining thermal-neutral voltage through its own internal Joule heat generation rather than external heating. The electrochemical reactions and electrical resistance within the electrolyser cells naturally produce the heat required to sustain the endothermic electrolysis reaction, eliminating the need for external heat supply mechanisms and maintaining high electrolysis efficiency without increasing device complexity.
3Adaptability or versatility
If frequent cycling between exothermic and endothermic modes is implemented to balance intermittent power, then adaptability to renewable power is improved, but reliability of temperature control deteriorates
Solution Approach 1:
The patent converts the temperature excursions that would normally require frequent mode cycling into a beneficial feature by using phase-change materials to absorb and release thermal energy. The PCM absorbs excess heat during exothermic modes and releases it during endothermic modes, smoothing out temperature variations and maintaining reliable temperature control while adapting to intermittent power availability without frequent cycling.
Solution Approach 2:
The system utilizes phase transitions of phase-change materials (melting and solidification) to buffer temperature fluctuations. During exothermic operation, the PCM absorbs excess thermal energy through melting; during endothermic operation, it releases stored energy through solidification. This phase transition mechanism provides thermal inertia that maintains temperature stability despite variable power input, improving both adaptability and reliability.
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 simplifies temperature control and allows operation with fluctuating power sources, reducing system complexity and maintaining efficiency in hydrogen production, while enabling large-scale production with reduced need for external control mechanisms.
Implementation Method 1
utilizing electrically heated air
Implementation Method 2
heat required for the endothermic electrolysis reaction is supplied by Joule heat generated within the electrolyser cells due to their internal electrical resistance
Implementation Method 3
high-temperature electrolysis by means of reactors that deploy steam electrolyser cells
Data Source
AI summary
The present invention relates to a steam electrolysis system for the production of hydrogen. The system comprises at least one steam electrolyser cell, at least one feeding gas arrangement comprising at least one electric steam generator, at least one feeding gas supply route for supplying a flow of feeding gas comprising at least steam from the at least one feeding gas arrangement to the at least one steam electrolyser cell, at least one gas moving device for removing hydrogen from the at least one steam electrolyser cell, and at least one external power supply source for operating the system. The at least one external power supply is electrically coupled to the at least one electric steam generator of the feeding gas arrangement and to the least one steam electrolyser cell. The at least one steam electrolyser cell and the at least one electric steam generator are electrically connected in parallel.