Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for evaluating uncertainty of natural gas component measurement

An evaluation method and a technology of certainty, applied in the field of natural gas, can solve the problems of cumbersome, complex uncertainty methods of natural gas component content, etc., and achieve the effect of ensuring benefits and simplifying the measurement steps

Inactive Publication Date: 2019-06-18
孙丽敏 +1
View PDF1 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the above-mentioned complex and cumbersome technical problems of the uncertainty method of natural gas composition content, and proposes a method that is simple and can easily and quickly calculate a method for evaluating the uncertainty of natural gas composition determination

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for evaluating uncertainty of natural gas component measurement
  • Method for evaluating uncertainty of natural gas component measurement
  • Method for evaluating uncertainty of natural gas component measurement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1, this embodiment provides a method for evaluating the uncertainty of natural gas composition determination

[0026] After connecting the carrier gas, start the machine and run for 1 hour. After the instrument is stabilized, the standard gas is continuously injected 3 times, and the repeatability of the instrument is checked to make it meet the requirements of GB / T 13610-2014. Use the average value of the corresponding components as the standard for the subsequent sample gas analysis to obtain the correction factor. The natural gas sample gas in the pipeline is taken for analysis, and the content of each component in the sample gas is obtained by using the external standard method. The hexane and heavier components in the sample gas are blown back into the detector TCD1 in the form of a mixture, and the content of hexane and heavier components in the sample gas is calculated by using the correction factor of n-hexane in the standard gas. The sample gas was...

Embodiment 2

[0059] Example 2 This example provides an uncertainty evaluation method for the determination of natural gas composition

[0060] After connecting the carrier gas, start the machine and run for 1 hour. After the instrument is stabilized, the standard gas is continuously injected 3 times, and the repeatability of the instrument is checked to make it meet the requirements of GB / T 13610-2014. Use the average value of the corresponding components as the standard for the subsequent sample gas analysis to obtain the correction factor. The natural gas sample gas in the pipeline is taken for analysis, and the content of each component in the sample gas is obtained by using the external standard method. The hexane and heavier components in the sample gas are blown back into the detector TCD1 in the form of a mixture, and the content of hexane and heavier components in the sample gas is calculated by using the correction factor of n-hexane in the standard gas. The sample gas was conti...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the technical field of natural gas and relates to a method for evaluating the uncertainty of natural gas component measurement. The method includes the following steps that: a, the mole fraction of each component in natural gas is obtained; b, the relative uncertainty of the average value of the reciprocals of the components in a standard gas response factor is calculated;c, the relative uncertainty of the response average value of the components is calculated according to the mole fractions of the components calculated in the step a; d, the uncertainty of the original mole fraction of each component is calculated according to a formula described in the descriptions of the invention; and e, the uncertainty of the post-normalization mole fractions of the componentsis calculated according to a formula described in the descriptions of the invention, so that the uncertainty of the natural gas component measurement can be obtained. According to the method for evaluating the uncertainty of the natural gas component measurement of the invention, uncertainty sources influencing analysis results are given in the form of an equation according to the logical relationship of mathematical models, and therefore, the method is simple and easy to implement.

Description

technical field [0001] The invention belongs to the technical field of natural gas, and in particular relates to an uncertainty evaluation method for determining the composition of natural gas. Background technique [0002] With the rapid development of the domestic natural gas industry and the continuous improvement of the natural gas trade market, the accuracy of measurement has become the focus of attention of both buyers and sellers and testing agencies. Natural gas composition analysis data is the most basic data in the natural gas industry. According to the data results of natural gas composition analysis, physical parameters such as relative density, calorific value and compressibility factor of natural gas can be calculated. The accuracy of natural gas composition analysis data is directly related to the accuracy of natural gas volume measurement and energy measurement, and involves the economic interests of both parties in the natural gas trade. Therefore, the rel...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/22
Inventor 孙丽敏郑岳田艳辉张奎裴全斌
Owner 孙丽敏
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com