Fuel Cell Power Generation System Flow Control
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Solution Overview
Problem
The existing fuel cell power generation systems face inefficiencies due to excessive hydrogen supply when using a fresh zeolite-based adsorptive removal section, as the adsorbing ratio of hydrocarbon components decreases over time, leading to unstable power generation and energy wastage.
Innovation Solution
Implementing a control mechanism to adjust the raw material flow rate based on the adsorption characteristics of the zeolite-based adsorptive removal section, specifically decreasing the flow rate as the accumulated flow volume increases, ensuring optimal hydrogen supply to the fuel cell.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a fresh zeolite-based adsorptive removal section is used to remove sulfur compounds from raw material, then sulfur poisoning of the catalyst is suppressed, but the adsorbing ratio of hydrocarbon components is high causing excessive hydrogen supply and energy waste
Solution Approach 1:
The patent applies dynamics by making the raw material flow rate adjustable and controllable over time. The control mechanism dynamically modifies the flow rate based on the adsorption characteristics of the zeolite-based adsorptive removal section, transitioning from a higher initial flow rate when the adsorber is fresh to a reduced flow rate as the adsorber becomes saturated, thereby optimizing hydrogen supply throughout the operational cycle.
Solution Approach 2:
The patent applies parameter changes by modifying the flow rate parameter of the raw material based on the adsorption capacity of the zeolite-based adsorptive removal section. The control mechanism adjusts this parameter according to the accumulated adsorption amount, reducing the flow rate as the adsorber approaches saturation to prevent excessive hydrogen generation while maintaining effective sulfur removal.
2Quantity of substance
If the raw material flow rate is set high to compensate for hydrocarbon adsorption by a fresh adsorptive removal section, then sufficient hydrogen is supplied initially, but hydrogen supply becomes excessive as adsorption capacity decreases leading to unstable power generation
Solution Approach 1:
The patent applies feedback by implementing a control mechanism that monitors the accumulated flow volume of raw material passing through the zeolite-based adsorptive removal section and uses this information to adjust the flow rate. This feedback loop ensures that the hydrogen supply quantity is continuously optimized based on the actual adsorption capacity, maintaining stable power generation by preventing both hydrogen deficiency and excessive hydrogen supply.
3Productivity
If the adsorptive removal section is exchanged frequently to maintain high adsorbing ratio, then sulfur removal efficiency is maintained, but system complexity and operational burden increase
Solution Approach 1:
The patent applies self-service by implementing a control mechanism that automatically adjusts the raw material flow rate based on the adsorption characteristics of the zeolite-based adsorptive removal section. This self-regulating system eliminates the need for frequent manual exchanges of the adsorptive removal section, as the control mechanism compensates for decreasing adsorption capacity by reducing the flow rate, thereby maintaining sulfur removal efficiency while reducing operational burden.
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 prevents excessive hydrogen supply, stabilizes power generation, and enhances energy efficiency by matching the hydrogen generation with the fuel cell's power requirements, thus improving the overall energy saving characteristics of the system.
Implementation Method 1
adsorbing and thus removing the sulfur compound in the raw material by an adsorptive removal section using an zeolite-based adsorptive removal agent
Implementation Method 2
Fuel cells capable of performing power generation at a high efficiency even with a small size
Data Source
AI summary
A fuel cell power generation system 100 for performing power generation using hydrogen-containing gas generated from a raw material containing a hydrocarbon component and an odorizer component includes a raw material supply section 4 for controlling a flow rate of the raw material; a water supply section 3 for supplying water; an adsorptive removal section 5 for causing the raw material to pass therethrough and adsorbing the odorizer component contained in the raw material; a reformer 1 for generating the hydrogen-containing gas by a reforming reaction of the raw material which has passed the adsorptive removal section and water supplied from the water supply section; a fuel cell 8 for performing power generation using the hydrogen-containing gas as a fuel; and an operating control section for, as an accumulated flow volume of the raw material supplied to the adsorptive removal section 5 from the raw material supply section 4 increases, decreasing the flow rate of the raw material to be supplied to the adsorptive removal section 5 from the raw material supply section 4, the flow rate being set with respect to an amount of power to be generated by the fuel cell 8.