Development of Carbon Dioxide Concentration Control System for an Air-Conditioned Room

Authors

  • Poonyasiri Boonpeng Department of Electrical Engineering, Faculty of Engineering, Rajamangala University of Technology Lanna, Chiang Mai, Thailand
  • Krisda Yingkayun Department of Electrical Engineering, Faculty of Engineering, Rajamangala University of Technology Lanna, Chiang Mai, Thailand
  • Uten Boonliam Tenergy Innovation Co., Ltd., Science and Technology Park, Chiang Mai, Thailand
  • Chawaroj Jaisin School of Renewable Energy, Maejo University, Chiang Mai, Thailand

Keywords:

Carbon Dioxide Concentration Control for an Air-conditioned Room, Ventilation, Indoor Air Quality

Abstract

The research aimed to develop a carbon dioxide concentration control system for an air-conditioned room by using step control conditions for ventilation rate according to the CO2 level. In addition, the accumulation of CO2 and ventilation rate of the ventilation system were systematically investigated. In the case when the control system started at the CO2 concentration of 1,000 ppm and the accumulation of CO2 concentration was 25.92 ppm/min for 120 min, the average concentration over the period of 60-120 min turned out to be 1,528.2 ppm. At such conditions, the consumption of total real power was 4.07 kWh, which was 1.39 times compared to the case with no ventilation. When the step control condition of the control system changed to start at the concentration of 750 ppm, the average concentration of 1,362 ppm and the power consumption of 4.19 kWh were noted; this represented an increase in the power consumption of 1.43 times. Finally, when using the maximum ventilation rate for 120 min, the average concentration of 919 ppm and the power consumption of 6.98 kWh were noted; the power consumption increased by 2.4 times. In the case where the CO2 level of around 1,500 ppm could be accepted, operation of control system with step control condition for ventilation led to the saving of the power consumption of approximately 40%.

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Published

2022-06-30

How to Cite

Boonpeng, P., Yingkayun, K., Boonliam, U., & Jaisin, C. (2022). Development of Carbon Dioxide Concentration Control System for an Air-Conditioned Room. Science and Engineering Connect, 45(2), 215–233. retrieved from https://ph04.tci-thaijo.org/index.php/SEC/article/view/10281

Issue

Vol. 45 No. 2 (2022): April - June

Section

Research Article

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