Method and measuring apparatus for determining specific quantities for gas quality

一种测量装置、质量流量的技术，应用在测量装置、比重测量、燃油测试等方向，能够解决不精确实施等问题

Active Publication Date: 2016-05-25
MEMS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Neither of these are implemented precisely: the standard volume is usually calculated using the average temperature and average pressure, and the calorific value is also the value averaged over the billing period

Method used

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  • Method and measuring apparatus for determining specific quantities for gas quality
  • Method and measuring apparatus for determining specific quantities for gas quality
  • Method and measuring apparatus for determining specific quantities for gas quality

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Embodiment Construction

[0128] Figure 1a One embodiment of a microthermal sensor 7 for the measuring device of the invention is shown. Such as Figure 1a As shown in , the microthermal sensor can be an integrated microthermal CMOS hot wire anemometer, which is placed in operation in a bypass gas line and supplied with gas or gas mixture flow 2a. The microthermal CMOS hot wire anemometer comprises a substrate 13 which typically contains a membrane 14 a few micrometers thick. The CMOS hot wire anemometer further comprises two thermocouples 15.1, 15.2 and a heating element 16 which can be arranged between these two thermocouples in the flow direction. The temperature can be detected by means of thermocouples 15.1, 15.2, which are obtained due to the heat exchange 15.1a, 15.2a with the gas or gas mixture flow 2a.

[0129] For further details on the functionality of the integrated microthermal CMOS hot wire anemometer, refer to D. Matter, B. Kramer, T. Kleiner, B. Sabbattini, T. Suter, "Mikroelektroni...

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Abstract

A method and a measuring apparatus for determining specific quantities for the gas quality in which the gas or gas mixture flows through an ultrasonic flow sensor as well as through a microthermal sensor, and the former is used for determining the sound and flow velocity and the latter for determining the thermal conductivity and the thermal capacity of the gas or gas mixture. The sound velocity, the thermal conductivity and the thermal capacity are subsequently used for the correlation of the specific quantities for the gas quality.

Description

technical field [0001] The invention relates to a method and a measuring device for determining specific quantities for gas quality and / or energy consumption in the domestic and industrial field. Background technique [0002] (Natural) gas composition and therefore gas quality will fluctuate more frequently and more violently in the future due to new sources (biogas, liquefied gas from all over the world, hydrogen from surplus current (current) from alternative energy production), And thus have different effects on the gas application process, which may also include negative effects. These processes can be adjusted to fluctuating gas qualities to ensure optimal and safe operation by directly measuring specific quantities of the gas quality on site. Specific quantities for gas quality include, for example, the Wobbe index for burner control units, the air-to-fuel ratio in power generation systems (industrial furnaces, fuel cells, etc.), the methane number for gas engines or ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/22
CPCG01N25/005G01N25/18G01N29/024G01N33/225G01N2291/02836G01F1/668G01F1/6882G01F1/66G01N7/00G01N9/00
Inventor P.普雷特雷
Owner MEMS
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