The study, conducted by researchers at North Carolina State University believes that the new design of the kitchen stove, which makes use of compressed wood pellets, reduce air pollution around 90% for a number of pollutants associated with health problems and climate change. Results derived from research on the field Rwanda furnaces designed for testing performance in real conditions.
"We wanted to evaluate these new pellet fuel stoves and funding of pure Alliance culinary and climate and clean air coalition based on our experience in conducting assessments on the spot," said Andy Grieshop, assistant professor of environmental engineering at NC State and the corresponding author article about the work.
"There have been numerous attempts to develop cleaner stoves for use in developing countries, but while they often do well in laboratory tests they have had disappointing results when tested in real conditions," said Grieshop. «Nevertheless, we found that feeding pellets stove is well proven in the field. we have seen a dramatic reduction of pollutant emissions. "
The pellet fuel furnaces rely on a battery-powered fan to effectively burn the pellets, the reduction of harmful emissions. The furnaces come with solar panels to recharge the batteries, making long-term use is possible in those areas where to connect the charger to the wall is not an option.
The researchers worked with residents in Rwanda, monitoring of emissions into the atmosphere, where people prepare food using conventional forest fires, which are common in rural areas; using conventional coal burning stoves, with & # 39 are common in urban areas; and using the new pellet stoves fueled.
The researchers tested for a number of air pollutants, including fine particulate matter (PM) and carbon monoxide and that a & # 39 are a source of health risks and carbon black, which is a & # 39 is one of the main causes of climate change. Most of the global emissions of carbon black is derived from heating and cooking food in homes.
"For the most part, we have seen a contaminant levels across the board cut of 90% or more using pellets burning oven," said Grieshop.
For example, researchers have found that an average reduction of VST furnaces emissions fuel pellets was 97% compared with wood fires and 89% compared to cookers charcoal. The pellet fuel furnace as with the & # 39 are the first cooking plates that have reached the International Organization for Standards highest level 5 carbon monoxide emissions in the standardization (ISO). Stoves are also met high target velocity of carbon monoxide emissions, established by the World Health Organization, although they fell slightly below the target of PM emissions.
«ISO standard was designed with laboratory tests in mind, and we got those results in this area, which is typical," said Grieshop.
"The only exception we found these emission reductions was when the pellet stove has been used improperly," said Grieshop. "For example, when people used sticks and other materials to start the fire instead of kerosene, as suggested by the manufacturer, we found higher levels of emissions to about 10% of the 59 pellet stove research trials. But even the worst performance of pellet stoves has been compared to the best performance of the dough for the preparation of food or wood charcoal. "
Although these results with the & # 39 are promising, the real challenge will be fed pellet stove concept can be expanded to meet the needs of millions or billions of people in regions with low income. The test results showing how effective fuel pellet stoves are at reducing air pollution from & # 39 are new, but the concept is the introduction of new cookers not with a 39 & #.
"Furnaces tested mostly provided free of charge by a company which makes money by selling the necessary wood fuel pellets," says Grieshop. "Interestingly, we found in Rwanda, that the cost of the pellets was comparable to the cost of coal people buy for their cooking needs. However, now, pellets are made using sawdust from wood waste operations. We just do not know to what extent it is scalable. "
In this document, «Pellet-fed gasifier furnace stove is suitable as a performance when used in a home in Rwanda," published in the journal Environmental Science & Technology, First author of the paper from the & # 39 Wyatt is a champion, a former North Carolina State doctoral researcher who is now at the Agency on the US Environmental Protection Agency.
Resistant pellets life-saving production
M Wyatt et al Champion pellets fed gasifier furnace suitable gas fire as performance when used in a home in Rwanda Environmental Science & Technology (2019). DOI: 10.1021 / acs.est.9b00009
Field studies are offset pellet stoves to reduce pollutant emissions by 90 percent, performance approaching the gas stove (2019 April 30)
received April 30, 2019
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