Performance, Gaseous and Particle Emissions from a Residential Pellet Stove

Abstract

The objectives of this chapter are to present experimental results on performance, gaseous and particle emissions obtained from a modern bottom feed pellet stove of 2.5 kW output in part load heat and 5 kW output in nominal heat. Two experiments in part load and four experiments in nominal load output were conducted in a stove manufacturing plant in the southern part of Belgium. The particle emissions measurements are mass concentrations of PM1 and PM2.5, number concentrations and their particle size distributions. Particle emission measurements were conducted continuously from a partial flow dilution tunnel using an Electrical Low Pressure Impactor Plus (ELPI+). The CO emissions were analyzed continuously from the flue gas by a Siemens Ultramat 6 gas analyzer, CO2 and O2 concentrations were measured continuously using a Horiba PG-250 gas analyzer. A performance analysis in terms of combustion efficiency together with different losses of the pellet stove is also discussed. The results show that PM1 and PM2.5 concentrations obtained from the combustion phase of the nominal load experiments varied from 43.3 to 276 mg/Nm3 and 66 to 36 mg/Nm3 respectively, while the particle number concentrations varied from 1.4 × 107 to 8.8 × 107 particles/cm3. The CO emissions obtained from the main combustion phase of the nominal load heat varied output from 50 to 145 mg/Nm3.

Characterization and dark oxidation of the emissions of a pellet stove

“…The estimated average OH concentration from the d-9 butanol decay was 1.4 × 10 6 molecules per cm 3 . This is a relatively low level, but it is not negligible.…”

“…Modern pellet boilers and stoves are an alternative to conventional log wood stoves because of their easy and automated operation, as well as their combustion efficiency which can exceed 90%. 2,3 Several previous studies have quantied and compared emissions from the two types of appliances for different fuel types and the role of burning conditions. [4][5][6][7][8][9] During the wintertime wood burning is one of the most important sources of organic aerosol (OA).…”

Indoor–Outdoor Oxidative Potential of PM2.5 in Wintertime Fairbanks, Alaska: Impact of Air Infiltration and Indoor Activities

“…Indoor emissions from burning wood are especially important in Fairbanks since wood is widely utilized for heating and can be a source of oxidative products . For example, pellet stoves can emit large amounts of fine particles and high levels of CO and polycyclic aromatic hydrocarbons (PAHs), especially in the ignition phase when combustion efficiency is low. , Cooking is another major source of indoor aerosols, which can emit fatty acids and dicarboxylic acids, , as well as combustion products if burning occurs.…”