OPEN ACCESS

Articles online

An Investigation of the Variability of Particulate Emissions from Woodstoves in New Zealand

Category: Physical and Chemical Characteristics of Aerosols

Volume: 15 | Issue: 6 | Pages: 2346-2356
DOI: 10.4209/aaqr.2015.02.0111
PDF | RIS | BibTeX

Guy Coulson , Richard Bian, Elizabeth Somervell

  • National Institute of Water and Atmospheric Research, Private Bag 99940, Auckland 1149, New Zealand

Highlights

Seven in-situ woodstove emissions measurement campaigns in New Zealand reanalysed.
All show log-normal distribution as does combined dataset.
No correlation between co-efficient of variance and sample size.
Emissions are inherently variable.Emission factors 9.8 (± 2.4) g kg–1 (older stoves) and 3.9 (± 3.8) g kg–1 (low-emission).


Abstract

Woodburning is the dominant source of PM10 in most of New Zealand, and the principal cause of exceedances of the national air quality 24-hr standard (50 µg m–3). Over the last decade New Zealand researchers have used multiple techniques to characterise woodstove emissions, including seven campaigns to measure real-life PM10 emissions from in-situ woodstoves. All measurements have shown considerable variation, both within and between campaigns. PM10 emission factors from in-situ tests exhibit a log-normal distribution with a geometric mean (± standard deviation) of 9.8 g kg–1 (± 2.4 g kg–1) and 3.9 g kg–1 (± 3.8 g kg–1) (dry wood) for older and low-emission stoves respectively. Since the distribution is log-normal we recommend the use of geometric mean rather than arithmetic mean as the emissions factor used for inventories. This paper examines the variability of PM10 emissions from woodstoves using a Kernel Density Estimate to compare the distributions within and between campaigns and correlations between coefficients of variations (c.v.) to see whether the variation in emissions factors could be reduced by the collection of further measurements to increase the size of the total dataset. We conclude that variation in emissions is inherent in the way woodstoves are used in real-life and that regulators will need to allow for a range of emissions in management plans as a definitive emission factor may not be possible.

Keywords

Woodsmoke PM10 Emission factors


Related Article

A Long Term Study on Characterization and Source Apportionment of Particulate Pollution in Klang Valley, Kuala Lumpur

Shamsiah Abdul Rahman , Mohd Suhaimi Hamzah, Md Suhaimi Elias, Nazaratul Ashifa Abdullah Salim, Azian Hashim, Shakirah Shukor, Wee Boon Siong, Abdul Khalik Wood
Volume: 15 | Issue: 6 | Pages: 2291-2304
DOI: 10.4209/aaqr.2015.03.0188
PDF | Supplemental material

Micro-Morphological Characteristics and Size Distribution of PM2.5 in the Kuitun-Dushanzi Region of Xinjiang, China

Dilinuer Talifu, Ayikezi Wuji, Yalkunjan Tursun, Hong Kang, Ying Hu, Yuhong Guo, Longyi Shao
Volume: 15 | Issue: 6 | Pages: 2258-2269
DOI: 10.4209/aaqr.2015.01.0053
PDF

Source Specific Cyto- and Genotoxicity of Atmospheric Aerosol Samples

Ágnes Filep , Luka Drinovec, Andrea Palágyi, László Manczinger, Csaba Vágvölgyi, Zoltán Bozóki, Regina Hitzenberger, Gábor Szabó
Volume: 15 | Issue: 6 | Pages: 2325-2331
DOI: 10.4209/aaqr.2015.03.0131
PDF

Ultrafine Particles and PM2.5 at Three Urban Air Monitoring Stations in Northern Taiwan from 2011 to 2013

Guan-Yu Lin, Guo-Rui Lee, Sih-Fan Lin, Yi-Hung Hung, Shih-Wei Li, Guo-Jei Wu, Huajun Ye, Wei Huang, Chuen-Jinn Tsai
Volume: 15 | Issue: 6 | Pages: 2305-2317
DOI: 10.4209/aaqr.2015.04.0271
PDF | Supplemental material
;