Pressure-Based Liquid Mixing System for Fuel Cell Reformer
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Solution Overview
Problem
Existing systems for forming liquid mixtures with precise volume and mass ratios are costly and require frequent calibration, making them impractical for applications like fuel cell systems where equipment costs and calibration schedules are prohibitive.
Innovation Solution
A method involving a containment structure with overflow ports and pressure detection to automatically dispense and mix liquids, allowing for accurate apportioning and mixing of preselected volumes without the need for costly calibration, using pressure changes to determine when to cease dispensing and stabilize liquid levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional measurement equipment such as scales or metering pumps are used to accurately measure and mix liquid components, then measurement precision and manufacturing precision are improved, but device complexity and operational costs increase due to costly equipment and regular calibration requirements
Solution Approach 1:
The patent replaces complex mechanical measurement systems (scales, metering pumps) with a simplified pressure-based detection system. A pressure sensor monitors pressure changes in a containment chamber during liquid dispensing, and these pressure changes are used to detect when the preselected volume has been reached, eliminating the need for costly calibrated measurement equipment.
Solution Approach 2:
The system automatically determines when the preselected volume has been dispensed by monitoring pressure changes within the containment chamber. The overflow detection mechanism self-regulates the dispensing process, ceasing flow when the predetermined volume is reached, without requiring external calibration or complex control systems.
2Manufacturing precision
If conventional measurement equipment is used to ensure accurate mix ratios, then manufacturing precision is improved, but ease of operation deteriorates due to frequent calibration requirements and high operational costs
Solution Approach 1:
The patent replaces complex mechanical measurement systems (scales, metering pumps) with a simplified pressure-based detection system. A pressure sensor monitors pressure changes in a containment chamber during liquid dispensing, and these pressure changes are used to detect when the preselected volume has been reached, eliminating the need for costly calibrated measurement equipment.
Solution Approach 2:
The system automatically determines when the preselected volume has been dispensed by monitoring pressure changes within the containment chamber. The overflow detection mechanism self-regulates the dispensing process, ceasing flow when the predetermined volume is reached, without requiring external calibration or complex control systems.
3Measurement precision
If calibrated measurement equipment is deployed in remote or backup power applications, then measurement precision is improved, but ease of operation worsens due to impractical calibration requirements in field conditions
Solution Approach 1:
The patent replaces complex mechanical measurement systems (scales, metering pumps) with a simplified pressure-based detection system. A pressure sensor monitors pressure changes in a containment chamber during liquid dispensing, and these pressure changes are used to detect when the preselected volume has been reached, eliminating the need for costly calibrated measurement equipment.
Solution Approach 2:
The system automatically determines when the preselected volume has been dispensed by monitoring pressure changes within the containment chamber. The overflow detection mechanism self-regulates the dispensing process, ceasing flow when the predetermined volume is reached, without requiring external calibration or complex control systems.
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 accurate and reproducible mixing of liquids with predetermined ratios, reducing operational costs and eliminating the need for frequent calibration, while maintaining precision in fuel processing and fuel cell applications.
Implementation Method 1
measuring a pressure of the liquid as a function of time within the containment volume
Data Source
AI summary
Systems and methods for forming a liquid mixture having a predetermined mix ratio and reforming systems, reforming methods, fuel cell systems, and fuel cell methods that utilize the liquid mixture. The methods include apportioning a preselected volume of liquid from a liquid source. During the apportioning, the liquid is a first liquid, and the methods further include providing a first preselected volume of the first liquid to a mix tank. The methods also include repeating the apportioning with a second liquid providing a second preselected volume of the second liquid to the mix tank to generate the liquid mixture. The methods also may include providing the liquid mixture to a reforming region, reforming the liquid mixture to generate a mixed gas stream that includes hydrogen gas, and providing the hydrogen gas to a fuel cell assembly to generate an electric current.