Hydrogen Production Load Control for Demand-Matched Tank Supply
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Solution Overview
Problem
Hydrogen production apparatuses at on-site stations face challenges in efficiently managing hydrogen production loads, leading to significant hydrogen gas waste due to continuous operation at rated values, even when demand is variable, resulting in excessive facility requirements and inefficiencies.
Innovation Solution
Implementing a control method that dynamically adjusts the operation load of the hydrogen production apparatus based on actual demand by starting up at a first load ratio, increasing to a second ratio upon vehicle arrival, and decreasing to a third ratio upon completion of filling, utilizing a multi-stage accumulator system and a control device with processing circuits to manage load changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the hydrogen production apparatus is continuously operated at 100% load (rated value) during business hours, then the hydrogen supply reliability is improved, but a large amount of hydrogen gas is discarded and facility size becomes excessive
Solution Approach 1:
The patent applies dynamics by transitioning from static continuous operation at fixed load to dynamic load adjustment. The control device dynamically changes the operation load of the hydrogen production apparatus based on real-time demand signals from accumulators and actual hydrogen supply requirements, enabling the system to adapt its production rate to actual needs and eliminate waste while maintaining reliability
Solution Approach 2:
The patent implements feedback control where the control device continuously monitors the state of accumulators and hydrogen supply demand, then uses this feedback information to adjust the hydrogen production apparatus load. This closed-loop feedback mechanism ensures that production matches actual demand, preventing both overproduction waste and supply shortfalls
2Loss of substance
If many accumulators are prepared to store one week's worth of hydrogen gas, then the hydrogen gas waste is reduced, but the facility size becomes excessive
Solution Approach 1:
The patent applies partial action by using only the necessary amount of accumulator storage capacity required for actual demand patterns rather than excessive storage for one week's worth of hydrogen. The dynamic load adjustment ensures that production matches demand in real-time, reducing the required storage capacity to minimal necessary levels while eliminating waste
Solution Approach 2:
The patent changes the operational parameters of the hydrogen production apparatus from fixed rated load to variable load ratios (first, second, and third load ratios). This parameter change enables the system to produce hydrogen at optimal rates matching actual demand, reducing the need for large storage facilities while preventing waste
3Quantity of substance
If the operation load of the hydrogen production apparatus is increased to meet peak demand, then the hydrogen supply adequacy is improved, but the hydrogen gas waste increases during low demand periods
Solution Approach 1:
The patent applies dynamics by enabling the hydrogen production apparatus to dynamically adjust its operation load between different load ratios based on real-time demand conditions. During peak demand, the apparatus operates at higher load ratios to ensure adequate supply; during low demand, it operates at lower load ratios to prevent waste, achieving both supply adequacy and waste reduction through dynamic adaptation
Data Source
AI summary
A hydrogen production supply system that produces hydrogen gas to be supplied to a hydrogen storage tank, the hydrogen production supply system including a control circuit configured to control an operation load ratio of the hydrogen production apparatus to a predetermined operation load ratio, to increase the operation load ratio of the hydrogen production apparatus to a first operation load ratio larger than the predetermined operation load ratio at first timing, and to decrease the operation load ratio of the hydrogen production apparatus to the predetermined operation load ratio from the first load operation ratio at second timing, wherein an increase in the operation load ratio at the first timing takes precedence over a decrease in the operation load ratio at the second timing.