Method for randomly adjusting carbon dioxide flux and leakage and back-diffusion coefficients and standard device
A technology of anti-diffusion coefficient and carbon dioxide, which can be used in control/regulation systems, general control systems, material inspection products, etc., and can solve problems such as insufficient accuracy and reliability
Inactive Publication Date: 2015-06-03
HENGYANG NORMAL UNIV
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If the accuracy and reliability of the method and instrument for measuring carbon dioxide flux are tested on a standard device, the standard device is only compared under a certain specific carbon dioxide flux, leakage and back diffusion coefficient conditions, and only It is not sufficient to rely on a specific carbon dioxide flux, leakage and back diffusion coefficient to test the accuracy and reliability of the method and instrument for measuring carbon dioxide flux. To test the accuracy and reliability of the method and instrument for measuring carbon dioxide flux
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[0026] A method for arbitrarily adjusting the flux and leakage of carbon dioxide and the back diffusion coefficient, the specific process is as follows:
[0027] In the standard device, the carbon dioxide in the carbon dioxide gas source 1 enters the pressure reducing valve 2, the heat exchanger 3, the buffer container 4, the regulating valve 5, the flow meter 6 and the air inlet joint 7-4 on the regulating device 7 through the pipeline, and then enters the atmosphere environment.
[0028] When adjusting the flux, adjust the regulating valve 5 to adjust the flow of carbon dioxide, and its unit is m 3 the s -1 , use the flowmeter 6 to monitor the size and stability of the carbon dioxide flow, the flux is a parameter related to the bottom area of the sample box 8 and the carbon dioxide flow, and its unit is m 3 m -2 the s -1 , so that the flux can be adjusted by adjusting the flow of carbon dioxide.
[0029] Since the contact surface between the panel 7-1 on the regulatin...
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The invention discloses a method for randomly adjusting a carbon dioxide flux and leakage and back-diffusion coefficients and a standard device. The method comprises the following steps: adjusting an adjustment valve to adjust the carbon dioxide flow, and monitoring the size and the stability of the carbon dioxide flow by a flowmeter, wherein the flux is a parameter relevant to the bottom area of a sample box and the carbon dioxide flow, and the unit is m<3>m<-2>s<-1>, so that the flux can be adjusted by adjusting the carbon dioxide flow. As the contact surface between a panel on an adjustment device and the sample box enables the carbon dioxide to not leak by passing through the contact surface between the panel and the sample box by well sealing and to only leak through a leakage hole in the panel; if the leakage coefficient of one leakage hole behind the sample box on a panel cover is lambda(leak1), the total leakage coefficient of n leakage holes is n[lambda(leak1)]; the panel does not have a back-diffusion effect, so that the change of the leakage coefficient and the back-diffusion coefficient in actual adjustment can be simulated by adjusting the leakage coefficient of the standard device.
Description
technical field [0001] The invention relates to a simulation method and a standard device for releasing carbon dioxide in the soil into the atmosphere, in particular to a method and a standard device capable of arbitrarily adjusting the flux and leakage of carbon dioxide and the back diffusion coefficient. Background technique [0002] The greenhouse effect is the main cause of climate warming, and carbon dioxide gas is the most important greenhouse gas. In the process of the global carbon cycle, carbon dioxide in the soil is an important form and link of the global carbon cycle. Soil carbon dioxide flux is an important measure of greenhouse gas exchange between the land and the atmosphere. It not only reflects soil physics, soil chemistry, and soil biological properties, but also reflects human behavior on land use, underground mineral resources, karst conditions, and soil carbon dioxide flux. Quantities can also be used in the evaluation of vegetation or soil fertility rec...
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Login to View More IPC IPC(8): G05B13/04G01N33/24
Inventor 谭延亮刘辉袁红志
Owner HENGYANG NORMAL UNIV