Emission characterization of modern wood stoves under real-life oriented operating conditions

• Published in: Atmospheric environment (1994) Vol. 192; pp. 257 - 266
• Main Authors: Klauser, Franziska, Carlon, Elisa, Kistler, Magdalena, Schmidl, Christoph, Schwabl, Manuel, Sturmlechner, Rita, Haslinger, Walter, Kasper-Giebl, Anne
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01-11-2018
• Subjects: benzo(a)pyrene; Emission factors; Emission inventory; Energiteknik; Energy Engineering; TSP sampling; Wood combustion; Emission factors; benzo(a)pyrene; Emission inventory; Wood combustion; TSP sampling
• ISSN: 1352-2310; 1873-2844; 1873-2844
• DOI: 10.1016/j.atmosenv.2018.08.024

The quality of emission inventories substantially bases on the reliability of used emission factors (EFs). In this work EFs were studied according to recently published characterization methods, called “beReal”, reflecting real life operating conditions in Europe. EFs for four pellet stoves and nine firewood appliances (roomheaters and cookers) of carbon monoxide (CO), organic gaseous compounds (OGC), nitrogen oxides, total solid particles (TSP) of hot and of diluted flue gas, total, elemental and organic carbon (TC, EC, OC) and benzo(a)pyrene were determined.
CO, OGC, TSPs, TC, EC and OC emissions from firewood appliances were significantly higher than for pellet stoves, indicating the high relevance of classifying appliances according to the operation type. TSP sampled from diluted flue gas at 40 °C (28 mg MJ−1 to 271 mg MJ−1 based on fuel input) was higher than TSP sampled from hot flue gas (21 mg MJ−1 to 70 mg MJ−1). This reveals the high relevance of sampling conditions for the determination of real life emissions. Benzo(a)pyrene emissions scattered over a wide range (0.5 μg MJ−1 to 129.8 μg MJ−1) indicating high sensitivity to unfavorable combustion conditions. Therefore a higher number of experimentally determined emissions factors could improve the reliability of EFs for inventories. CO emissions measured in beReal tests were substantially higher than official type tests, thus showing that type testing results provide limited information for the determination of real life emissions.
A systematic evaluation of EFs with defined real life methods like beReal would substantially improve the reliability of emission inventories.
•13 modern combustion appliances were tested according real life test methods.•Parallel measurements of TSP in hot or diluted flue gas.•Applicability of test cycles to determine emission factors for inventories.•Comparison of emissions from type testing and real life measurements.