Liquid Hydrogen Tank Control Device Wireless Level Measurement
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Solution Overview
Problem
Conventional liquid hydrogen tank measurement systems are expensive and prone to internal vaporization due to heat intrusion and conduction, making it difficult to accurately measure hydrogen levels and control temperature.
Innovation Solution
A liquid hydrogen tank control device with a control board that uses wireless communication to measure hydrogen levels via temperature sensors at different heights on the outer surface of the inner tank, along with a pressure sensor, to determine the tank's status and control heating and pressure systems remotely.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a temperature sensor is installed through an outer wall of the tank to measure liquid hydrogen level, then the measurement can be performed remotely, but heat intrusion through the penetrated part promotes vaporization of liquid hydrogen and makes it difficult to control flow rate
Solution Approach 1:
The patent extracts the temperature sensor from the conventional penetration-through-wall installation and relocates it to the inner tank surface. This removes the harmful thermal conduction path while preserving the remote measurement capability, as the sensor can still detect temperature at the tank interior surface without creating a thermal bridge to the exterior.
Solution Approach 2:
The patent introduces the inner tank surface as an intermediary medium. Instead of directly penetrating the outer wall, the temperature sensor is placed on the inner tank surface, which acts as a mediator to transmit temperature information without creating a direct thermal conduction path that would cause heat intrusion and vaporization.
2Measurement precision
If a silicon diode sensor is used to measure temperature of cryogenic materials, then accurate temperature measurement is achieved, but the sensor costs a very high price
Solution Approach 1:
The patent replaces the expensive silicon diode sensor with a more economical temperature sensor that can operate at cryogenic temperatures. While individual sensor cost is reduced, the system maintains adequate measurement precision through multiple sensors positioned at different heights to determine liquid hydrogen level, and the overall system cost is reduced.
3Measurement precision
If a temperature sensor is directly contacted with liquid hydrogen inside the tank to measure temperature, then accurate temperature measurement is achieved, but internal vaporization is accelerated by conduction heat from external devices and wires
Solution Approach 1:
The patent extracts the temperature sensor from direct contact with liquid hydrogen and relocates it to the inner tank surface. This removes the thermal conduction path from external devices and wires that would otherwise accelerate vaporization, while the sensor can still accurately measure the temperature of the liquid hydrogen environment through the tank surface.
4Measurement precision
If multiple temperature sensors are provided at different heights on the outer surface of the inner tank to measure liquid hydrogen level, then accurate level measurement is achieved without heat intrusion, but the device complexity increases
Solution Approach 1:
The patent segments the temperature measurement function into multiple sensors positioned at different heights on the inner tank surface. Each sensor measures temperature at its specific location, and the control board integrates these segmented measurements to determine liquid hydrogen level. This segmentation enables accurate level measurement without requiring complex single-sensor systems, and the sensors are positioned on the surface rather than penetrating the wall, reducing overall system complexity.
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 solution enables remote monitoring and accurate measurement of hydrogen levels, reduces internal vaporization, and improves temperature control, enhancing management convenience and reducing costs.
Implementation Method 1
heat intrusion through a penetrated part of the tank promotes vaporization of liquid hydrogen in the tank
Implementation Method 2
measuring a level of liquid hydrogen stored in a storage space of an inner tank based on a plurality of temperature values measured by a plurality of temperature sensors provided at different heights from each other
Implementation Method 3
a heating device configured to increase pressure of the liquid hydrogen tank
Implementation Method 4
a pressure sensor capable of wireless communication and configured to measure pressure in the storage space of the inner tank
Data Source
AI summary
The present disclosure discloses a liquid hydrogen tank control device. The liquid hydrogen tank control device is capable of wireless communication. A control board measures a level of liquid hydrogen stored in a storage space of an inner tank of a liquid hydrogen tank based on a plurality of temperature values measured by a plurality of temperature sensors located at different heights from each other on an outer surface of the inner tank located inside an outer tank of the liquid hydrogen tank.