Generation of Negative Air Ions by Use of Piezoelectric Cold Plasma Generator

Autor:	Stefan Nettesheim, Dariusz Korzec, Daniel Neuwirth
Rok vydání:	2021
Předmět:	QC717.6-718.8 Materials science Physics QC1-999 Plasma physics. Ionized gases Airflow Analytical chemistry Atmospheric-pressure plasma High voltage Plasma piezoelectric direct discharge atmospheric pressure plasma Concentration ratio Ion ozone Electric field negative air ions DC bias
Zdroj:	Plasma Volume 4 Issue 3 Pages 29-407 Plasma, Vol 4, Iss 29, Pp 399-407 (2021)
ISSN:	2571-6182
DOI:	10.3390/plasma4030029
Popis:	The negative air ions (NAI) are used for the removal of particles or droplets from the air. In this study, three types of piezoelectric cold plasma generators (PCPG), in combination with cylindrical electrostatic ion filters, are applied for NAI production. The high voltage on the filter cylinder is induced by the electric field from the piezoelectric transformer of the PCPG. To achieve the dc bias, the cylinder of the electrostatic filter is connected to the ground over ultrafast switching diodes. The ion concentrations are measured for different airflows, PCPG powers, and electrostatic filter geometries. The NAI concentration in the order of magnitude of 107 cm−3, and a negative-to-positive ion concentration ratio of over 200 is reached. The production of ozone is evaluated and the PCPG configuration with a minimum ozone production rate is proposed. The ozone concentration below 60 ppb is reached in the airflow of 90 m3/h.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f1d8ea311cd5fac18e692d07c533379f https://doi.org/10.3390/plasma4030029 Zobrazit plný text záznamu