Method for automatically measuring the amount of water in a natural gas
pipeline with the aid of a computer controlled gas chromatograph
    71.
    发明授权
    Method for automatically measuring the amount of water in a natural gas pipeline with the aid of a computer controlled gas chromatograph 失效
    借助计算机控制的气相色谱仪自动测量天然气管道中的水量的方法

    公开(公告)号:US4535620A

    公开(公告)日:1985-08-20

    申请号:US522791

    申请日:1983-08-12

    摘要: A method for analyzing various components in a natural gas pipeline with the aid of a computer controlled gas chromatograph comprising the steps of: (a) providing the computer control unit with a data base for operating the gas chromatograph including at least: (1) periodically causing a sample of the natural gas to be supplied to the gas chromatograph; (2) operating the gas chromatograph to analyze the various components in the natural gas stream; (3) computing the amount of the various components in the natural gas stream; and (4) reporting the amount of components in the natural gas stream.

    摘要翻译: 一种借助于计算机控制的气相色谱仪分析天然气管道中的各种组分的方法,包括以下步骤:(a)向计算机控制单元提供用于操作气相色谱仪的数据库,该数据库至少包括:(1)周期性地 使天然气样品供给气相色谱仪; (2)运行气相色谱仪分析天然气流中的各种成分; (3)计算天然气流中各种成分的量; 和(4)报告天然气流中的组分数量。

    CALCULATION DEVICE, CALCULATION METHOD, AND PROGRAM

    公开(公告)号:US20240210373A1

    公开(公告)日:2024-06-27

    申请号:US18287137

    申请日:2021-04-19

    发明人: Tomoo ISHIGURO

    IPC分类号: G01N33/22 G01N21/45

    CPC分类号: G01N33/225 G01N21/45

    摘要: A calculation device is configured to calculate a value relating to a combustible target gas containing miscellaneous gas components. The calculation device includes: a heating value calculation unit configured to calculate a heating value of the target gas on the basis of converted heating values obtained from a refractive index and a density of the target gas, respectively; a miscellaneous gas total approximate-concentration calculation unit configured to calculate an approximate concentration of the miscellaneous gas components on the basis of the converted heating values; and a virtual basic-heating-value calculation unit configured to calculate, on the basis of the heating value and the approximate concentration, a virtual basic heating value of the target gas when the miscellaneous gas components are assumed to be removed.

    Concentration measuring device
    77.
    发明授权

    公开(公告)号:US11703434B2

    公开(公告)日:2023-07-18

    申请号:US17729164

    申请日:2022-04-26

    摘要: A concentration measuring device includes a circulation passage, an aspirator, a differential pressure sensor, and a control unit. The aspirator is disposed in a fuel tank and is connected to the circulation passage. While a gas flows from a gaseous layer within a fuel tank through the circulation passage due to a negative pressure generated in the aspirator, the differential pressure sensor measures a pressure difference of the gas within the circulation passage between an upstream side of a narrowed part, having a narrower passage area than an adjacent portion of the circulation passage, and a downstream side of the narrowed part. The control unit is configured to calculate a density of the fuel vapor from the pressure difference of the gas and to calculate a concentration of the fuel vapor from the density of the fuel vapor.

    Assembly for capacitive measurement of the amount of gas in a fluid flow

    公开(公告)号:US10073050B2

    公开(公告)日:2018-09-11

    申请号:US15524950

    申请日:2015-11-04

    IPC分类号: G01R27/26 G01N27/22 G01N33/22

    摘要: An assembly comprising an upstream pipe, a downstream pipe, and a system (1) for measuring variation in the gas content of a two-phase flow, the assembly including: an insulating sheath (6), an upstream ground (2), a measurement electrode (3), a guard electrode (7), and a downstream ground (4) arranged in succession in the insulating sheath (6) and each presenting an identical internal section defining an internal flow duct for a two-phase flow from the upstream ground (2) towards the downstream ground (4) in line with the upstream pipe and the downstream pipe, the guard electrode (7) being subjected to the same potential as the measurement electrode (3), the measurement electrode (3) measuring the capacitance of the two-phase flow relative to the upstream ground (2) and variation in that capacitance, the upstream ground (2) and the downstream ground (4) being electrically connected to the upstream pipe and to the downstream pipe, respectively.