Project at a Glance
Title: Evaluation of low-emission wood stoves
Principal Investigator / Author(s): Shelton, Jay W
Contractor: Shelton Research, Inc.
Contract Number: A3-122-32
Research Program Area: Emissions Monitoring & Control
Topic Areas: Stationary Sources
This project was undertaken to provide a broad database to assist the California Air Resources Board in assessing the impact of residential wood burning on air quality in California. Many emissions and efficiencies were determined over all burn phases -- kindling, main load and charcoal phases -- and not limited to main load or cold-to-cold phases as has been the usual practice. Both standard fuel loads of milled Douglas fir and more realistic loads of green and seasoned California oak (tanbark oak) were used in a variety of stoves characteristics of California practice. In addition a very clean-burning pellet stove was tested to extend both emissions data and test methods comparisons into a region that has not been explored before.
Additional unique features of this project were determination of ammonia and cyanide in smoke. Creosote deposition in chimneys was quantified by direct gravimetric measurement and correlated with total particles. PAH and benzene emissions were studied over a wide range of conditions. The idea that catalytic stoves emit a relatively high amount of nitrogen oxide was investigated. The comparatively inexpensive dilution tunnel method of determining particulates has been further correlated with the OM7 (Oregon Method 7). Finally, a comparison of the Oregon flue loss efficiency method and DOE direct efficiencies has been made for the first time.
For questions regarding this research project, including available data and progress status, contact: Heather Choi at (916) 322-3893
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