APPLICATION OF CO<sub>2</sub> DETECTOR BASED ON SENSORS IN CO<sub>2</sub> FLUX DETECTION OF RESERVOIRS

LU Youhao; YANG Fan; ZHANG Xi; SUN Songhua; PANG Xiaobing

doi:10.13205/j.hjgc.202310007

Volume 41 Issue 10

Oct. 2023

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LU Youhao, YANG Fan, ZHANG Xi, SUN Songhua, PANG Xiaobing. APPLICATION OF CO2 DETECTOR BASED ON SENSORS IN CO2 FLUX DETECTION OF RESERVOIRS[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(10): 45-50,68. doi: 10.13205/j.hjgc.202310007

Citation:

LU Youhao, YANG Fan, ZHANG Xi, SUN Songhua, PANG Xiaobing. APPLICATION OF CO₂ DETECTOR BASED ON SENSORS IN CO₂ FLUX DETECTION OF RESERVOIRS[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(10): 45-50,68. doi: 10.13205/j.hjgc.202310007

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APPLICATION OF CO₂ DETECTOR BASED ON SENSORS IN CO₂ FLUX DETECTION OF RESERVOIRS

doi: 10.13205/j.hjgc.202310007

1. College of Environment, Zhejiang University of Technology, Hangzhou 310000, China;
2. Rural Electrification Research Institute of the Ministry of Water Resources, Hangzhou 310000, China;
3. Green Intelligence Environmental School, Yangtze Normal University, Chongqing 408100, China;
4. Shaoxing Ecological Environment Monitoring Center, Shaoxing 312000, China

Received Date: 2023-07-25
Available Online: 2023-12-26

Abstract

Abstract

The commonly used CO₂ detection instrument for the measurement of CO₂ flux at the water-air interface of natural water is based on the long light path infrared absorption method, which is bulky and expensive. To reduce the research cost and the mass and volume of the detection equipment, a low-cost CO₂ sensor based on the principle of non-dispersive infrared (NDIR) was deployed in the flux box to build a low-cost CO₂ detection instrument, and the in-situ detection contrast experiment with the referred instrument was carried out. The results showed that, CO₂ volume fraction detection results of the low-cost CO₂ detector showed a good correlation (R²=0.86) with the referred instrument, and the relative deviation range of the low-cost detector was -1.45% to 0.92%. According to the low-cost detector results, the CO₂ flux at each detection point was estimated in the range of 7.76 to 15.93 mmol/(m²/d), and its change rule was the same as that of the referred instrument. Environmental relative humidity and voltage drift of the sensor itself were the main sources of CO₂ flux detection deviation. The interference of these two factors could be reduced by humidity correction and increasing the number of CO₂ sensors in the flux box. This low-cost detector has a good application prospect in measuring the CO₂ flux of reservoirs.
- sensor,
- flux box,
- carbon dioxide flux,
- reservoir,
- detection deviation

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References(35)

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