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A system and method for controlling the temperature drop during the deflation process of a high-pressure gas cylinder

A technology of high-pressure gas cylinders and control methods, which is applied to the methods of container discharge, container filling methods, and equipment discharged from pressure vessels, etc., which can solve energy consumption, the inability to throttle temperature rise, effective use of heat, and temperature drop control methods Issues such as safety and effectiveness need to be improved to achieve the effect of zero energy consumption temperature drop control

Active Publication Date: 2021-04-20
NORTH CHINA UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, in order to suppress the temperature drop generated during the dehydrogenation process of high-pressure hydrogen storage cylinders, researchers have mainly proposed the following temperature drop control methods: 1) Using electricity or electromagnetic induction to generate Joule heat to heat the cylinder material, this method The problem is that there is a potential safety hazard of hydrogen in contact with electric current, and additional energy consumption is required; 2) Heat exchange elements such as phase change materials, heat pipes or heat exchange tube bundles are inserted into the cylinder to heat the hydrogen in the cylinder. Due to the limitation of the size of the mouth of the high-pressure hydrogen storage cylinder, it is difficult to arrange a sufficient heat exchange area; 3) Move the pressure reducing valve in the gas intake pipeline to the inside of the cylinder, and use the throttling and temperature rise effect of high-pressure hydrogen to heat the hydrogen in the cylinder. The method is also restricted by the size of the bottle mouth, and it is difficult to arrange a sufficient heat exchange area, so that the heat generated by throttling temperature rise cannot be effectively used
In summary, the safety and effectiveness of the existing high-pressure gas cylinder degassing process temperature drop control methods need to be improved

Method used

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  • A system and method for controlling the temperature drop during the deflation process of a high-pressure gas cylinder
  • A system and method for controlling the temperature drop during the deflation process of a high-pressure gas cylinder
  • A system and method for controlling the temperature drop during the deflation process of a high-pressure gas cylinder

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Effect test

Embodiment 1

[0042] figure 1 It is a structural schematic diagram of the temperature drop control system during the degassing process of the high-pressure gas cylinder according to Embodiment 1 of the present invention. see figure 1 , the temperature drop control system of the high-pressure gas cylinder deflation process in this specific embodiment includes: a gas cylinder filling and deflation device, a multi-channel connection device and a controller; The gas pipeline is connected; the controller is connected with the gas cylinder filling and deflation device, and is used to control the gas temperature of the gas cylinder filling and deflation device to be greater than the preset temperature lower limit during the deflation process, so as to ensure the gas cylinder Safe to use.

[0043] The gas cylinder filling and deflation device includes 2 gas cylinder units; the first gas cylinder unit communicates with the second gas cylinder unit through a bypass line 5; the first gas cylinder un...

Embodiment 2

[0050] figure 2 It is a structural schematic diagram of the temperature drop control system during the degassing process of the high-pressure gas cylinder according to Embodiment 2 of the present invention. see figure 2 , the temperature drop control system of the high-pressure gas cylinder deflation process in this specific embodiment includes: a gas cylinder filling and deflation device, a multi-channel connection device and a controller; The gas pipeline is connected; the controller is connected with the gas cylinder filling and deflation device, and is used to control the gas temperature of the gas cylinder filling and deflation device to be greater than the preset temperature lower limit during the deflation process, so as to ensure the gas cylinder Safe to use.

[0051] The gas cylinder filling and deflation device includes 3 gas cylinder units; the first gas cylinder unit communicates with the second gas cylinder unit through a bypass pipeline 5; the second gas cyli...

Embodiment 3

[0058] image 3 It is a structural schematic diagram of the temperature drop control system during the degassing process of the high-pressure gas cylinder according to Embodiment 3 of the present invention. see image 3 , The difference between this specific embodiment and Embodiment 1 is that a pipeline heating 13 is provided on the bypass pipeline 5, and the pipeline heating 13 is used to heat the compressed air flowing through the bypass pipeline 5. gas.

[0059] The gas bottle filling and deflation device in this specific embodiment always keeps the main inflation stop valve 10 in a closed state during the deflation process. The pipeline heater 13 always heats the gas flowing through the bypass pipeline 5 during the deflation process. The temperature drop control during the deflation process mainly includes the following steps:

[0060] (1) When starting to deflate, first open the shut-off valve 4b and the shut-off valve 8, and the shut-off valve 4a is in the closed st...

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Abstract

The invention discloses a system and method for controlling the temperature drop during the deflation process of a high-pressure gas cylinder. The system includes: a gas cylinder filling and deflation device, a multi-channel connection device and a controller; the gas cylinder filling and deflation device communicates with the main deflation pipeline through the multi-channel connection device; To control the gas temperature of the gas cylinder filling and deflation device during the deflation process is greater than the lower limit of the preset temperature; the gas cylinder filling and deflation device includes N gas cylinder units; each of the gas cylinder units is connected to the adjacent gas cylinder unit It communicates with the bypass pipeline; each gas cylinder unit communicates with the main exhaust pipeline through a multi-channel connection device; N is greater than or equal to 2. The invention can realize safe, high-efficiency, and zero-energy-consumption temperature drop control during the deflation process of the high-pressure gas cylinder.

Description

technical field [0001] The invention relates to the field of new energy technology, in particular to a system and method for controlling the temperature drop during the deflation process of a high-pressure gas cylinder. Background technique [0002] Hydrogen energy has the advantages of cleanness, regeneration, wide sources, and high energy conversion efficiency of hydrogen fuel cells. It is of great significance to solve the two world-wide problems of "energy shortage" and "environmental pollution". In recent years, with the rapid development of hydrogen energy, hydrogen fuel cell vehicles have attracted great attention from all over the world due to their advantages of environmental protection, fast refueling, and high energy conversion efficiency. In order to achieve the 500km driving range required by commercialization, it has become a trend to use 70MPa vehicle-mounted high-pressure hydrogen storage. At present, fiber fully wound high-pressure hydrogen storage cylinder...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F17C7/00F17C13/02
CPCF17C7/00F17C13/026F17C2250/07
Inventor 赵磊何广平赵全亮苏婷婷贾涛鸣狄杰建袁俊杰
Owner NORTH CHINA UNIVERSITY OF TECHNOLOGY