Hydrogen Carrier Vaporization Control for Fast Supply Response
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Solution Overview
Problem
Existing hydrogen supply systems are unable to quickly adjust the amount of hydrogen gas supplied due to delays in vaporizing the organic hydride raw material, making it difficult to meet varying demands of hydrogen utilizers.
Innovation Solution
A hydrogen supply system with a vaporizer, dehydrogenation reactor, and control device that allows for quick regulation of the hydrogen carrier flow rate, utilizing multiple vaporizers with different heat sources and bypass passages to control the flow rate and pressure, and incorporating a control device to manage valve openings based on required hydrogen gas flow rates and pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a single vaporizer is used to vaporize the hydrogen carrier, then the system structure is simple, but the response speed to change hydrogen gas supply amount is slow
Solution Approach 1:
The single vaporizer is divided into multiple vaporizers (first vaporizer and second vaporizer) with different heat sources. This segmentation allows independent control of each vaporizer, enabling faster adjustment of hydrogen carrier vaporization rate and thus improving the response speed of hydrogen gas supply adjustment.
Solution Approach 2:
The multiple vaporizers are designed to perform the same function (vaporizing hydrogen carrier) but with different heat sources, making the system universally adaptable to different heating requirements and enabling flexible adjustment of vaporization rates to meet varying hydrogen gas supply demands.
2Productivity
If the heat source for the vaporizer is increased to speed up vaporization, then the vaporization rate increases, but the energy consumption increases
Solution Approach 1:
The waste heat from the dehydrogenation reactor is merged with the heat source of the first vaporizer. This combination allows the vaporizer to utilize otherwise wasted thermal energy, increasing the vaporization rate while reducing overall energy consumption of the system.
Solution Approach 2:
The waste heat that would otherwise be discarded is converted into a useful resource for vaporizing the hydrogen carrier. By utilizing this previously harmful waste heat, the system achieves higher productivity without proportionally increasing energy consumption.
3Quantity of substance
If the flow rate of vaporized hydrogen carrier is increased to meet higher hydrogen demand, then the hydrogen gas supply amount increases, but the pressure fluctuation increases
Solution Approach 1:
The control device continuously monitors the flow rate of vaporized hydrogen carrier and adjusts the valve opening degree based on this feedback. This closed-loop control system maintains pressure stability by dynamically adjusting the vaporization rate to match the actual hydrogen gas supply requirements, preventing excessive pressure fluctuations.
Solution Approach 2:
The system transitions from static vaporization control to dynamic control where the vaporizer operation is continuously adjusted based on real-time flow rate measurements. This dynamic adjustment capability allows the system to maintain pressure stability while accommodating varying hydrogen gas supply demands.
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 quick and precise adjustment of hydrogen gas supply to match the demands of hydrogen utilizers, ensuring efficient operation and stability.
Implementation Method 1
a vaporizer (3) for vaporizing a hydrogen carrier in liquid form
Implementation Method 2
a dehydrogenation reactor (4) for generating hydrogen from the vaporized hydrogen carrier provided from the vaporizer through a dehydrogenation reaction
Data Source
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AI summary
[Problem] To provide a hydrogen generation system and a method for operating the same which enable a quick change in an amount of hydrogen gas to be supplied. [Solution] A hydrogen supply system (1) includes a vaporizer (3) for vaporizing a hydrogen carrier in liquid form; a dehydrogenation reactor (4) for generating hydrogen from the vaporized hydrogen carrier provided from the vaporizer through a dehydrogenation reaction; and a control device (30) for controlling a flow rate of the vaporized hydrogen carrier flowing through an outlet of the vaporizer. The control device may adjust an amount of heat for heating the hydrogen carrier to thereby regulate the flow rate of the vaporized hydrogen carrier flowing through the outlet of the vaporizer. The hydrogen supply system (1) further comprises: a main passage (L6) connected to an outlet of the dehydrogenation reactor and passing through a first vaporizer; a bypass passage (L7) connected to the main passage and bypassing the first vaporizer; and a first flow control valve (V6) provided in at least one of the main passage and the bypass passage.