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System and method for measuring infrared spectrum in greenhouse gas emission flux

A technology for emission flux and greenhouse gases, applied in measurement devices, material analysis through optical means, instruments, etc., can solve problems such as fast response speed, high resolution, and limited gas composition

Active Publication Date: 2014-06-11
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Abstract
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Problems solved by technology

TDLAS spectroscopic technology has high sensitivity, high resolution and fast response, but the gas components that can be measured at the same time are limited

Method used

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  • System and method for measuring infrared spectrum in greenhouse gas emission flux
  • System and method for measuring infrared spectrum in greenhouse gas emission flux
  • System and method for measuring infrared spectrum in greenhouse gas emission flux

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Embodiment Construction

[0025] Such as figure 1 As shown, the mid-infrared spectral measurement system of the greenhouse gas emission flux of the present invention includes a first air inlet 1 and a second air inlet 2, a first air valve 3, a second air valve 4, and three air inlets with different sampling heights. Through valve 5, Nafion tube 6, drying tube with chemical desiccant 7, gas mass flow controller 8, gas sample cell 10, FTIR spectrometer 11, air pump 12, nitrogen purge pump 13, computer 14 and three-dimensional ultrasonic wind velocity Instrument 15; the first air valve 3 and the second air valve 4 respectively control the gas in the first air inlet 1 and the second air inlet 2 to enter the gas transmission air circuit; the three-way valve 5 has three valves a, b, and c The valve port in direction a is connected to the first gas valve 3 and the second inlet valve 4 respectively, the valve port in direction b is connected to the gas transmission path of the sample gas to be tested, and the ...

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Abstract

The invention discloses a system and a method for measuring an infrared spectrum in a greenhouse gas emission flux. The system mainly comprises a two-way-feeding automatic switching gas circuit, a gas sample pool, a Fourier transform infrared (FTIR) spectrograph, a three-dimensional ultrasound anemograph and a computer. According to the system, the emission flux of measured gas is obtained according to the mixing ratio concentration of greenhouse gas measured by the FTIR spectrograph as well as information of a surface layer wind field, close to a concentration measurement height, measured by the three-dimensional ultrasound anemograph.

Description

technical field [0001] The invention relates to the field of environmental monitoring and protection, and gas emission optical detection technology and method, in particular to a mid-infrared spectrum measurement system and method for greenhouse gas emission flux. Background technique [0002] Global warming caused by the increase in the concentration of greenhouse gases in the atmosphere has become an important environmental problem facing the world. Atmospheric CO 2 、CH 4 and N 2 O contributes about 80% to the greenhouse effect, and agricultural soils and grasslands are important sources of these greenhouse gas emissions. In order to control the emission of greenhouse gases, it is necessary to better understand the basic process and change law of the main greenhouse gas emissions in the ecosystem, which requires the measurement technology and system of greenhouse gas source emissions and ecological fluxes. [0003] At present, the commonly used method to measure the ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/3504
Inventor 王薇刘文清张天舒
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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