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Method for detecting evaporation rate of low-temperature insulation gas cylinder

A low-temperature heat insulation and detection method technology, which is applied in the direction of container filling method, container discharge method, gas/liquid distribution and storage, etc., can solve problems such as time-consuming cost, liquid level drop, inaccurate detection results, etc., and achieve high Accuracy and reliability, reduced evaporation loss, shortened detection time effect

Active Publication Date: 2019-03-12
广东省特种设备检测研究院东莞检测院 +1
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Problems solved by technology

The longer the detection time, on the one hand, it will consume a lot of time and cost, on the other hand, it will cause waste of low-temperature detection working fluid, which is not conducive to the rapid development of the gas cylinder industry
At the same time, the longer the detection time, the greater the evaporation of the liquid inside the cryogenic insulating gas cylinder, the lower the liquid level, and the filling rate of the cryogenic liquid is lower than the rated filling rate, which will inevitably lead to inaccurate test results

Method used

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  • Method for detecting evaporation rate of low-temperature insulation gas cylinder
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  • Method for detecting evaporation rate of low-temperature insulation gas cylinder

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Embodiment Construction

[0062] Specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although specific embodiments of the invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and is not limited to the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present invention, and to fully convey the scope of the present invention to those skilled in the art.

[0063] It should be noted that certain terms are used in the specification and claims to refer to specific components. Those skilled in the art should understand that they may use different terms to refer to the same component. This specification and claims do not use differences in nouns as a way to distinguish components, but use differences in functions of components as a criterion for distinction. As mentioned throughout the specification and claims, "com...

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Abstract

The invention discloses a method for detecting the evaporation rate of a low-temperature insulation gas cylinder. The method comprises the following steps that after the low-temperature heat insulation gas cylinder is filled, the deflation valve is kept to be opened, other valves are closed, the low-temperature heat insulation gas cylinder is placed in the first stage, the total leakage heat Qtotal of the low-temperature heat insulation gas cylinder at the first stage and a cylinder body leakage heat Qbarrel are obtained and the ratio f of the cylinder body leakage heat in the total leakage heat is calculated and is equal to Qtotal / Qbarrel, the low-temperature heat insulation gas cylinder enters the second stage of the test, the actual evaporation rate alpha0 is calculated(the equation ofalpha0 is described in the specification), and the calculation evaporation rate alpha c of the low-temperature heat-insulation hot gas cylinder in the second stage is obtained(the equation of alpha cis described in the specification). Comparing and calculating the relative error Eta between the evaporation rate alpha c and the actual evaporation rate alpha 0(the equation of Eta is described in the specification), if the error value is within 5%, and the calculation evaporation rate alpha c is considered to be reliable.

Description

technical field [0001] The invention belongs to the technical field of low-temperature heat-insulating gas cylinders, in particular to a method for detecting the evaporation rate of low-temperature heat-insulating gas cylinders. Background technique [0002] Cryogenic insulated gas cylinders are used as a carrier to store cryogenic liquids, such as common cryogenic liquids such as liquid nitrogen, liquid oxygen, liquid helium, liquid hydrogen, and household liquefied natural gas. Before the invention of cryogenic insulating gas cylinders, most of the high-pressure containers used to store these gases were multi-layer insulating materials, and their structures were bulky, which was not conducive to transportation, industrial and household use, and the corresponding thermal insulation performance was not as good as that of cryogenic insulating gas cylinders. It often causes a large evaporation loss of cryogenic liquid. Cryogenic liquids have a wide range of applications. The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F17C13/02G06F17/18
CPCF17C13/026F17C2250/0439F17C2250/0631G06F17/18
Inventor 侯冀川蔡延彬朱华强何泾渭张夏冯永康刘剑桢冯仲勋赖学良屈治国张剑飞魏国盟杨中志吕浩李朝
Owner 广东省特种设备检测研究院东莞检测院
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