Compressed Gas Dispensing Threshold Pressure Control
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Solution Overview
Problem
The existing methods for delivering compressed gases, such as hydrogen, to receiving tanks face challenges in maintaining high pressures and ensuring consistent supply to meet desired dispensing rates, particularly in hydrogen-powered vehicles.
Innovation Solution
A method involving selecting a desired time-averaged dispensing rate, calculating a threshold pressure, and withdrawing compressed gas from supply vessels with pressures greater than the threshold to fill storage vessels, which are then used to dispense gas into receiving vessels, ensuring efficient transfer and maintaining high pressures throughout the process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If compressed gas is withdrawn from supply vessels to fill storage vessels at high pressure, then the receiving vessels can obtain sufficient charge of compressed gas, but the supply pressure may drop below the threshold needed to meet the desired dispensing rate
Solution Approach 1:
The system pre-calculates a threshold pressure before dispensing operations begin. This threshold represents the minimum pressure required in supply vessels to maintain the desired time-averaged dispensing rate. By establishing this threshold in advance, the system can make informed decisions about when to withdraw gas and when to preserve supply pressure, ensuring both sufficient charge delivery and maintenance of dispensing rate requirements.
Solution Approach 2:
The system continuously monitors the pressure in supply vessels and compares it against the pre-calculated threshold pressure. Based on this feedback, the system dynamically controls the withdrawal of compressed gas from supply vessels. When pressure approaches the threshold, gas withdrawal is reduced or stopped, preventing the supply pressure from dropping below the level needed to meet dispensing rate requirements.
2Reliability
If gas is transferred from supply vessels to storage vessels and then to receiving vessels, then reliable high-pressure delivery is achieved, but the process complexity increases
Solution Approach 1:
Storage vessels serve as intermediary components between supply vessels and receiving vessels. They buffer the gas supply, allowing the system to maintain reliable high-pressure delivery to receiving vessels even when supply vessel pressures fluctuate. The storage vessels decouple the supply side from the dispensing side, improving reliability while managing process complexity through a clear modular architecture.
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 method ensures that receiving vessels receive a sufficient and consistent charge of compressed gas by maintaining high pressures and optimizing gas transfer from supply vessels to storage and then to receiving vessels, aligning with industry demands for reliable high-pressure delivery.
Implementation Method 1
The compressed gas from the tube trailer may be compressed further to storage vessels at a compressed gas dispensing station to high pressure compressed gas for dispensing to receiving vessels
Data Source
AI summary
Method for dispensing a compressed gas to receiving vessels wherein a threshold pressure of compressed gas needed to supply the dispensing system is calculated, the threshold pressure depending on the anticipated time-averaged dispensing rate for a time period. Compressed gas is passed from a plurality of supply vessels, for example a tube trailer, to a plurality of storage vessels, and dispensed from the plurality of storage vessels to a plurality of receiving vessels. The supply vessel providing the compressed gas is required to have a compressed gas pressure greater than the calculated threshold pressure.