AAAR 37th Annual Conference October 14 - October 18, 2019 Oregon Convention Center Portland, Oregon, USA
Abstract View
In-Stack Aethalometry Measurements of Woodburning Stoves
JAKE LINDBERG, Patricia Fritz, Nicole Vitillo, Rebecca Trojanowski, Thomas Butcher, Thomas Wainman, Nathan Walz, Todd Crawford, New York State Dept. of Health
Abstract Number: 611 Working Group: Biomass Combustion: Emissions, Chemistry, Air Quality, Climate, and Human Health
Abstract The 2018 Wood Stove Design Challenge (WSDC) was held in November on the National Mall, in Washington D.C. During this event, three wood burning stoves were tested to determine their emissions characteristics according to a protocol developed specifically for the event. The testing protocol was developed to challenge the stoves to perform well under loading conditions that are more representative of real world use.
As part of the WSDC our team measured the emission of black carbon (BC) species using two instruments; the Brechtel Tri-color Absorption Photometer Model 2901(TAP) and the Thermoscientific Personal DataRAM pDR-1500 (pDR). The TAP measures light absorbance at three wavelengths 365, 528, and 652 nm. Using the red light absorption measurements we estimated the real time BC concentration in the flue gas using standard practices. We also used the pDR, which measures light scattering at the 880 nm wavelength, to produce a separate estimate of BC concentration. Additionally, in order to better characterize the flue gas aerosol we used the differences in the absorption of 370 and 880 nm wavelength light reported by the TAP to calculate an effective Angstrom-Absorption Exponent (AAE).
In this work we report: the BC measurements from the sampling campaign, discuss the trends in BC emission during different phases of the operational protocol, and show how aethalometric measurements of flue gas can be a useful tool, to help understand the operation of combustion appliances through changes in carbon characteristics. During the WSDC our team also made measurements of the flue gas composition and the Particle Number Concentration (PNC), which will be discussed separately.