Investigation of Optimal Dilution Ratio from a Dilution Tunnel Using in Particulate Matter Measurement

The objectives of the paper were to evaluate particle mass concentrations of PM1 (size <1 µm) and PM2.5 (size <2.5 µm), mass size distributions and CO emissions under standard laboratory conditions obtained from two commercially available modern residential wood stoves with capacity 10 kW and 20 kW. Four combustion batches with minor modification of primary air flows into the combustion chamber for each stove were conducted to evaluate the emission results. Particle mass concentrations and size distributions were measured in real time using an Electrical Low Pressure Impactor Plus (ELPI+) instrument, which measures particles with a fast response time in a wide particle size range from 6 nm to 10 µm aerodynamic diameter. Gaseous concentrations of O2 and CO2 were measured continuously using a Horiba PG-250 analyzer and CO emissions were measured using a Siemens Ultramat 6 gas analyzer. The measurement protocols of each combustion test were conducted according to the European standard EN 13229. The combustion experiments were conducted in a laboratory of a stove manufacturing plant in Belgium. The results showed that PM1 and PM2.5 concentrations of all the batches of both stoves varied from 116 to 327 mg/Nm 3 and 139 to 413 mg/Nm 3 , respectively in the combustion cycle. Particle mass size distribution for all batches from both stoves is very similar showing a maximum in the fine mode at a particle size of around 330 nm to 500 nm. The CO emissions from all the batches varied from 447 to 1184 mg/Nm 3 for the 10 kW stove and 958 to 1545 mg/Nm 3 for the 20 kW stove. The experimental results of PM1, PM2.5 concentrations and CO emissions from combustion measurements could be useful for the improvement of the combustion process as well as the reduction of gaseous and particle mass emissions from these residential biomass combustion appliances.

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Performance, Gaseous and Particle Emissions from a Residential Pellet Stove

Obaidullah¹,

Ruyck²

2021

Renewable Energy - Technologies and Applications

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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.

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Investigation of Optimal Dilution Ratio from a Dilution Tunnel Using in Particulate Matter Measurement

Cited by 3 publications

References 22 publications

Computational modeling of woodstove pollutants in dilution tunnels

Computational modeling of woodstove pollutants in dilution tunnels

Particle mass and gaseous emissions from small scale modern wood stoves

Performance, Gaseous and Particle Emissions from a Residential Pellet Stove

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