Jonisering av inomhusluft : en intressant luftreningsteknik med många frågetecken
Kempe, Minna (2012)
Kempe, Minna
Yrkeshögskolan Novia
2012
Julkaisun pysyvä osoite on
https://urn.fi/URN:ISBN:978-952-5839-45-6
https://urn.fi/URN:ISBN:978-952-5839-45-6
Tiivistelmä
Ion generating air cleaners are commonly used in indoor environments to enhance air quality by removing smell, chemical compounds and particles from the air. The way ion generators affect air quality and their air cleaning efficiency are often questioned, partly because the mechanisms by which ions remove pollutants are complicated and poorly understood. Ion generating air cleaners have also been criticized for their ability to produce ozone as a byproduct.
This is a report about an ion generator and its ability to produce ozone and break down volatile organic compounds (VOC) in the air. The results show that although ozone concentrations can be maintained very low (<10 ppb) by using low ionization intensity and high ventilation rate, there is still a risk to produce unhealthy concentrations (>50 ppb). Results also indicate that ionization affects VOC, but the effects that could be seen were often small and inconsistent. Because small amounts of ozone were produced during ion generation it remains unclear whether the effects were caused by ions or ozone, or both. Sampling VOC in the presence of ozone distorted the results, thus a scrubber for removing ozone prior to sampling was tested and used during the study.
This study was part of a project called Kompetenscentrum Byggnad–Luftkvalitet–Hälsa 2 (KLUCK 2, 2008–2012)—a joint effort between Novia University of Applied Sciences in Vasa, Finland and Umeå University in Sweden to increase knowledge about indoor air–related problems. The project was financed by the European territorial Cooperation program Botnia–Atlantica, Regional Council of Ostrobothnia, County Administrative Board of Västerbotten, Novia University of Applied Sciences and Umeå University.
This is a report about an ion generator and its ability to produce ozone and break down volatile organic compounds (VOC) in the air. The results show that although ozone concentrations can be maintained very low (<10 ppb) by using low ionization intensity and high ventilation rate, there is still a risk to produce unhealthy concentrations (>50 ppb). Results also indicate that ionization affects VOC, but the effects that could be seen were often small and inconsistent. Because small amounts of ozone were produced during ion generation it remains unclear whether the effects were caused by ions or ozone, or both. Sampling VOC in the presence of ozone distorted the results, thus a scrubber for removing ozone prior to sampling was tested and used during the study.
This study was part of a project called Kompetenscentrum Byggnad–Luftkvalitet–Hälsa 2 (KLUCK 2, 2008–2012)—a joint effort between Novia University of Applied Sciences in Vasa, Finland and Umeå University in Sweden to increase knowledge about indoor air–related problems. The project was financed by the European territorial Cooperation program Botnia–Atlantica, Regional Council of Ostrobothnia, County Administrative Board of Västerbotten, Novia University of Applied Sciences and Umeå University.