CO2 sensor versus Volatile Organic Compounds (VOC) sensor – analysis of field measurement data and implications for demand controlled ventilation

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Abstract

The study investigated performance of two commercially available non-selective metal oxide semiconductor VOC sensors and two commercially available non dispersive infrared CO2 sensors installed in one person office. The office was equipped with demand controlled ventilation. The signals from VOC and CO2 sensors, presence detection sensor and supply/return air flow were logged. VOC and CO2 signals were in agreement with respect to indicated need for mechanical ventilation for 49 % of occupied time (81 % of whole measuring period). VOC measurement would clearly trigger the mechanical ventilation in contradiction with CO2 measurement in 11 % of occupied time. Opposite situation was observed in 6 % of occupied time. In approx. 22 % of occupied time CO2 signal has just reached the set-point while the VOC signal was significantly below. In that case the ventilation start up would be dependent on settings of a particular controller.
Original languageEnglish
Title of host publicationProceedings of Indoor Air 2014
Number of pages8
PublisherInternational Society for Indoor Air Quality and Climate (ISIAQ)
Publication date2014
Publication statusPublished - 2014
Event13th International Conference on Indoor Air Quality and Climate - University of Hong Kong, Hong Kong, Hong Kong
Duration: 7 Jul 201412 Jul 2014
Conference number: 13
http://www.indoorair2014.org/

Conference

Conference13th International Conference on Indoor Air Quality and Climate
Number13
LocationUniversity of Hong Kong
CountryHong Kong
CityHong Kong
Period07/07/201412/07/2014
Internet address

Bibliographical note

Topic B4: Ventilation

Keywords

  • Demand Controlled Ventilation
  • VOC sensor
  • CO 2 sensor
  • Field measurements

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