Real-Time Hydrogen Fueling Control for Pressure Ramp Adaptation
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Solution Overview
Problem
Existing hydrogen fueling protocols, such as SAE J2601, are inadequate for large-sized mobility vehicles due to assumptions of worst-case scenarios, limiting application range, capacity, velocity, and efficiency, and do not allow for real-time communication and control.
Innovation Solution
A real-time responding hydrogen fueling process that calculates pressure loss coefficients and inner diameters based on real-time tank conditions, using wireless communication to adjust pressure ramp rates and thermodynamic models for optimized fueling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing hydrogen fueling protocols (SAE J2601) are used with pre-prepared tables and parameters, then safety is ensured through conservative worst-case assumptions, but application range is limited and efficiency is reduced
Solution Approach 1:
The patent transitions from static pre-prepared tables to dynamic real-time calculation of pressure ramp rates. The system continuously computes pressure ramp rates based on current tank conditions (pressure, temperature, volume) rather than relying on fixed lookup tables, enabling adaptation to varying vehicle types and fueling scenarios while maintaining safety through real-time monitoring and adjustment
Solution Approach 2:
The patent changes the approach from using fixed parameters in lookup tables to dynamically calculating parameters based on real-time conditions. The system computes pressure ramp rates as variable parameters that adjust according to actual tank state, allowing the same system to accommodate different vehicle scales and fueling requirements without being constrained by pre-defined categories
2Device complexity
If existing hydrogen fueling protocols use fixed lookup tables with predetermined parameters, then device complexity is reduced through standardized procedures, but productivity is lowered due to inability to optimize for real-time conditions
Solution Approach 1:
The patent implements a feedback mechanism where the system continuously monitors tank pressure and temperature during fueling, then uses this real-time data to adjust the pressure ramp rate. This closed-loop control enables optimization of fueling speed while maintaining safety, improving productivity without requiring overly complex predetermined protocols for every scenario
Solution Approach 2:
The patent replaces the mechanical lookup table system with a computational approach that calculates pressure ramp rates using thermodynamic equations. This substitution allows the system to adapt to real-time conditions through mathematical modeling rather than relying on fixed procedural tables, enhancing efficiency while keeping the control logic manageable
3Reliability
If existing hydrogen fueling protocols assume worst-case scenarios for all vehicles, then safety is maintained across all conditions, but fueling velocity is restricted due to conservative pressure ramp rate limits
Solution Approach 1:
The patent applies different pressure ramp rates to different phases of the fueling process based on local tank conditions. Instead of using a single conservative limit for the entire fueling process, the system calculates and adjusts the pressure ramp rate at each moment based on current pressure, temperature, and volume, allowing faster fueling when conditions permit while maintaining safety when approaching limits
4Ease of operation
If existing hydrogen fueling protocols are designed for standardized vehicle types, then ease of operation is improved through uniform procedures, but adaptability to different vehicle scales is lost
Solution Approach 1:
The patent creates a universal fueling control system that can accommodate different vehicle types and scales through real-time calculation rather than vehicle-specific protocols. The system uses fundamental thermodynamic equations that apply to any compressed hydrogen storage system, making the same operational procedure adaptable to various vehicle configurations without requiring vehicle-type-specific lookup tables
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 safe, rapid, and efficient hydrogen fueling across varying tank conditions, minimizing time and maintaining critical parameters, and allowing for flexible tank capacities and flow rates.
Implementation Method 1
complete fueling is not easy due to compression and heat generation according to the Joule-Thomson effect
Data Source
AI summary
A method for performing a real-time response hydrogen-charging process in a hydrogen-charger may comprise the steps of: calculating a pressure loss coefficient value in a charging line to be applied to a real case; calculating the inner diameter value of the charging line to be applied to the real case, on the basis of the calculated pressure loss coefficient value, a preset reference pressure loss coefficient value in a reference case, and a preset inner diameter value of a reference charging line in the reference case; and performing the hydrogen-charging process by applying the calculated inner diameter value of the charging line to a predetermined thermodynamic model for real-time hydrogen-charging in the real case.