Hydrogen Vaporizer Bypass Control for Stable Gas Temperature
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Solution Overview
Problem
Hydrogen engine vehicles face issues with maintaining hydrogen gas temperature within a predetermined range, as excessive temperature reduces engine output and ultracold temperatures can damage piping, necessitating a controlled temperature management system.
Innovation Solution
A hydrogen supply device with a heater, vaporizer, circulation and bypass flow paths, and a control unit that adjusts the heating medium flow path to maintain the hydrogen gas temperature within a set range by switching between heating and bypass paths based on temperature and output feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the heating medium temperature is increased to maintain hydrogen gas temperature, then the hydrogen gas temperature can be maintained within the predetermined range, but the energy consumption increases
Solution Approach 1:
The system dynamically switches between two flow paths based on real-time temperature measurements. The switching valve adjusts the heating medium flow path between the heater and bypass path according to whether the vaporizer inlet temperature is below or above the set temperature, optimizing energy usage while maintaining hydrogen gas temperature within the required range
Solution Approach 2:
The control unit changes the flow path configuration parameter based on temperature conditions. When the heating medium temperature is sufficient (above set temperature), the system switches to the bypass path to avoid unnecessary heating. When temperature is insufficient (below set temperature), the system switches to the heater path to provide required heating, thus adapting parameters to actual needs
2Temperature
If the heating medium flows through the heater to increase temperature, then the hydrogen gas temperature can be maintained, but the system complexity increases due to flow path switching
Solution Approach 1:
The heating medium flow path is segmented into two distinct paths: a first flow path through the heater and a second flow path through the bypass. The switching valve selectively connects one path at a time, simplifying the control logic while providing temperature regulation capability
Solution Approach 2:
The switching valve acts as an intermediary device that mediates between the two flow paths. It receives control signals from the control unit and redirects the heating medium flow accordingly, isolating the complexity of path switching from the rest of the system
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 maintains hydrogen gas temperature within a predetermined range, preventing output reduction and piping damage, while adjusting to changes in power plant output through dynamic set temperature calculation and correction.
Implementation Method 1
a heater (20) that heats a heating medium (31)
Implementation Method 2
a vaporizer (40) that vaporizes liquid hydrogen into hydrogen gas using the heating medium (31) that is heated
Implementation Method 3
vaporizes liquid hydrogen into hydrogen gas using the heating medium (31) that is heated
Data Source
AI summary
A heater, a vaporizer, a circulation flow path that circulates the heating medium between the heater and the vaporizer, a bypass flow path connected to the circulation flow path so as to bypass the heater, a heater inlet valve and a bypass valve that switch flow paths between a first flow path in which the heating medium flows through the heater and does not flow through the bypass flow path, and a second flow path, and a control unit are included. The control unit switches a flow path of the heating medium to the first flow path when a vaporizer inlet heating medium temperature is lower than a set temperature, and switches the flow path of the heating medium to the second flow path when the vaporizer inlet heating medium temperature is no lower than the set temperature.