Title:
Fuel Moisture Influences in Log Wood Combustion
Author(s):
Hartmann, H., Turowski, P.
Document(s):
Paper
Abstract:
Combustion tests with a common 30 kW downdraft log wood boiler and a 6 kW chimney stove were performed to determine the effect of a variable fuel moisture content in wood log combustion. Fuel moisture content was varied between 8 and 36 % with the boiler and between 1 and 18 % with the stove. The results show higher pollutant emissions when the moisture content rises above 25 % (mainly CO and particles). Below this mark a modern boiler is largely capable of maintaining a low pollutant level at constant combustion efficiencies of around 89 %. Only the maximum power output is gradually decreasing with increasing moisture contents. For the stove it was found that super-dried wood logs (as given with forced aeration using hot air for drying) can lead to severe emission peaks (CO and particles). These emissions can exceed the usual level as prevailing with regular air dried wood logs two-or three times. Log wood quality standards should therefore also include requirements for a minimum moisture content.
Keywords:
boiler, combustion, efficiency, emissions, moisture, particle emission, stove, wood logs
Topic:
Thermochemical conversion - Combustion for small scale applications
Subtopic:
Combustion for small scale applications
Event:
18th European Biomass Conference and Exhibition
Session:
VP2.5.10
Pages:
1306 - 1311
ISBN-13:
978-88-89407-56-1
ISBN-10:
88-89407-56-5
Paper DOI:
10.5071/18thEUBCE2010-VP2.5.10
Price:
FREE
