1 / 26

2005 Residential Wood Combustion Emissions Estimates

2005 Residential Wood Combustion Emissions Estimates. based on WSU 2001 Survey. July 19, 2007. Purpose of Survey: Update residential wood combustion emissions estimates. Last statewide survey was done by Bonneville Power Administration in 1990

justus
Download Presentation

2005 Residential Wood Combustion Emissions Estimates

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 2005 Residential Wood Combustion Emissions Estimates based on WSU 2001 Survey July 19, 2007

  2. Purpose of Survey: Update residential wood combustion emissions estimates • Last statewide survey was done by Bonneville Power Administration in 1990 • Post-1990 woodstove sales indicated downward trend • 1990 – 2000 population growth ~ 21% • Current information wanted for air stagnation advisories, and air quality planning

  3. Survey Partnership • Washington, Oregon, Idaho, and Canada were working together to develop regional emissions estimates for air quality analyses • Federal Environmental Protection Agency special project funding was available to states • WA/OR/ID combined EPA funding to make improvements to several emissions sources, including residential wood combustion

  4. Survey • Social & Economic Sciences Research Center, Washington State University • John Tarni, Ph.D., principal investigator • Thom Allen, study director • Computer-assisted telephone interviews • Trained interviewers • Six call attempts, and individual scheduling • Interviewer monitoring • All responses were recorded. Database of coded responses was provided.

  5. Survey Sampling * Purge removed all known non-working and non-household phone lines ** Incomplete included: refusals, unable to reach, non-working numbers, business numbers, unable to interview, FAX numbers, partial interviews

  6. Survey Design • Questions designed to estimate • number of households owning and using wood-burning devices • amount of wood burned by device and certification status • geographic differences • seasonal, weekday/weekend, hourly variation • Drew upon 1990 BPA survey questions • Funding determined number of questions, sampling areas, and sample size

  7. Questions – Devices Owned by Type • Do you have a … • fireplace without a stove insert? • fireplace with a stove insert? • free-standing woodstove? • pellet stove? • wood-fired central furnace? • Do you know when your stove or insert was purchased? (determines certification status) • year (month if known), or • approximately how old • If more than one device, which is used most for heating?

  8. Results – Devices Owned by Type

  9. Results – Devices Owned by Type

  10. Questions - Devices Used by Type • Did you burn any cord wood last year? • Did you burn any presto logs last year? • Did you burn any wood pellets last year?

  11. Results – Devices Used by Type

  12. Results – Devices Used by Type

  13. Questions – Amount of Wood Burned • How many cords did you burn last year? • cord is 4’ x 4’ x 8’ • How many presto logs did you burn last year? • How many 40-lb bags of wood pellets did you burn last year?

  14. Supporting Data – Conversion to pounds burned

  15. Results – Wood Burned in Tons

  16. Results – Wood Burned in Tons

  17. Supporting Data – PM2.5 Emission Rates in pounds per ton burned Certified INS and WS assumes split of 71% non-catalytic and 29% catalytic per the 2002 National Emissions Inventory (EPA).

  18. Results – PM2.5 Emissions Estimates in tons per year

  19. Results – PM2.5 Emissions Estimates in tons per year

  20. Survey Summary Statistics

  21. Questions – Temporal Variation • Did you use this equipment in the … • winter, spring, summer, fall of 2000? (months were specified for each season) • During a typical weekday, did you use this equipment from … • 6am-10am, 10am-4pm, 4pm-10pm, 10pm-6am? • During a typical weekend, did you use this equipment from … • 6am-10am, 10am-4pm, 4pm-10pm, 10pm-6am?

  22. Results – Temporal Variation

  23. Results – Temporal Variation

  24. Questions and Results – Heating Sources • What is your main source of heat?

  25. Home Heating Statistics Sources • AHS04: 2004 America Housing Survey, Seattle-Everett Metro Area (http://www.census.gov/prod/2005pubs/h170-04-60.pdf) • CEN00: 2000 Census (http://www.census.gov/Press-Release/www/2002/demoprofiles.html) • WSU01: 2001 WSU Wood burning survey

  26. Strengths activity based on local survey survey reduction process was checked by ODEQ number of devices similar to surveys done for PSCAA incorporated/unincorporated and east/west differences emissions factors were considered above average by EPA air quality modeling results not unreasonable (explain) Weaknesses survey generally did not ask questions in multiple ways (verification) required many steps to calculate emissions estimates from survey responses may somewhat overestimate cord wood use emission factors are based on testing done in late 1980s to 1990 inherent variability Observations on Estimates

More Related