Hydrogen Filling System Buffer Line Heating
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Solution Overview
Problem
The existing hydrogen filling systems for fuel cell electric vehicles face issues with freezing at the connecting portion between the fueling nozzle and the receptacle during low-temperature hydrogen filling, leading to separation failures and potential overheating of hydrogen tanks, which compromises safety and durability.
Innovation Solution
A hydrogen filling system that incorporates a buffer line connected to the hydrogen supply line to utilize heat of compression and generate heat for the receptacle, preventing freezing and including a temperature measuring and display unit to monitor and control hydrogen tank temperatures, thereby ensuring safe and reliable filling operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If fast filling of hydrogen tanks is performed, then filling speed is improved, but freezing occurs at the receptacle connecting portion
Solution Approach 1:
The patent utilizes the cold hydrogen gas that would otherwise cause freezing as a cooling medium to cool the hydrogen tank during filling, while simultaneously using the heat of compression from the buffer line to prevent receptacle freezing. This converts the harmful cold effect into a beneficial dual-function system where cold gas cools the tank and compressed gas protects the receptacle.
Solution Approach 2:
The buffer line acts as an intermediary component that introduces a small amount of hydrogen gas to undergo adiabatic compression, generating heat specifically at the receptacle area. This intermediary mechanism locally counteracts the cold effect without interfering with the overall fast filling process.
2Productivity
If fast filling of hydrogen tanks is performed, then filling speed is improved, but separation of fueling nozzle from receptacle fails
Solution Approach 1:
The patent converts the harmful freezing effect into a beneficial thermal management opportunity by using the cold hydrogen to cool the tank while using heat of compression from the buffer line to prevent receptacle freezing, ensuring reliable separation.
Solution Approach 2:
The system changes the thermal parameters at the receptacle by introducing compressed hydrogen gas that raises the local temperature, preventing the freezing that would otherwise occur during fast filling and enable reliable nozzle separation.
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
The system effectively suppresses freezing at the receptacle, facilitates easy separation of the fueling nozzle, and prevents overheating of the hydrogen tank, enhancing safety and minimizing durability issues by using heat of compression and real-time temperature monitoring.
Implementation Method 1
a buffer line (26) connected to the hydrogen supply line (24) to heat the receptacle (100) using heat of compression by the hydrogen (2110) supplied into the hydrogen supply line (24)
Data Source
AI summary
The present disclosure relates to a hydrogen filling system that includes a receptacle that is provided in a fuel cell electric vehicle and to which a fueling nozzle that dispenses hydrogen is connected, a manifold connected with a hydrogen tank provided in the fuel cell electric vehicle, a hydrogen filling line that connects the receptacle and the manifold, a hydrogen supply line that connects a fuel cell stack provided in the fuel cell electric vehicle and the manifold, and a buffer line that is connected to the hydrogen supply line and that heats the receptacle using heat of compression by the hydrogen that is supplied into the hydrogen supply line during filling of the hydrogen tank with the hydrogen. The present disclosure may obtain advantageous effects of suppressing freezing of the receptacle and improving safety and reliability.