Corona ions from overhead transmission voltage powerlines : effect on DC e-field and ambient particle concentration levels
Fatokun, Folasade O., Jayaratne, Rohan, Morawska, Lidia, Birtwhistle, David, Rachman, Rihandanu, & Mengersen, Kerrie (2010) Corona ions from overhead transmission voltage powerlines : effect on DC e-field and ambient particle concentration levels. Environmental Science & Technology, 44(1), pp. 526-531.
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Along with their essential role in electricity transmission and distribution, some powerlines also generate large concentrations of corona ions. This study aimed at comprehensive investigation of corona ions, vertical dc e-field, ambient aerosol particle charge and particle number concentration levels in the proximity of some high/sub-transmission voltage powerlines. The influence of meteorology on the instantaneous value of these parameters, and the possible existence of links or associations between the parameters measured were also statistically investigated.
The presence of positive and negative polarities of corona ions was associated with variation in the mean vertical dc e-field, ambient ion and particle charge concentration level. Though these variations increased with wind speed, their values also decreased with distance from the powerlines. Predominately positive polarities of ions were recorded up to a distance of 150 m (with the maximum values recorded 50 m downwind of the powerlines). At 200 m from the source, negative ions predominated. Particle number concentration levels however remained relatively constant (103 particle cm-3) irrespective of the sampling site and distance from the powerlines. Meteorological factors of temperature, humidity and wind direction showed no influence on the electrical parameters measured. The study also discovered that e-field measurements were not necessarily a true representation of the ground-level ambient ion/particle charge concentrations.
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|Item Type:||Journal Article|
|Additional Information:||This article is freely available from the American Chemical Society website 12 months after the publication date. See links to publisher website in this record.|
|Keywords:||Aerosol Particles, Charged Particles, Ambeint Ions, Corona Ions, High Voltage Powerlinee|
|Subjects:||Australian and New Zealand Standard Research Classification > PHYSICAL SCIENCES (020000) > ATOMIC MOLECULAR NUCLEAR PARTICLE AND PLASMA PHYSICS (020200) > Particle Physics (020203)|
Australian and New Zealand Standard Research Classification > EARTH SCIENCES (040000) > ATMOSPHERIC SCIENCES (040100) > Atmospheric Aerosols (040101)
|Divisions:||Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering|
Past > QUT Faculties & Divisions > Faculty of Science and Technology
Current > Institutes > Institute of Health and Biomedical Innovation
Past > Schools > Physics
Past > Schools > Mathematical Sciences
Past > Schools > School of Engineering Systems
|Copyright Owner:||Copyright 2010 American Chemical Society.|
|Deposited On:||19 Nov 2010 17:32|
|Last Modified:||01 Mar 2012 00:23|
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