22.04.2012, 18:00 Raleigh

22.04.2012, 18:00 Raleigh
Told the graduate student Gurdas Sandhu and Christopher Frey from North Carolina State University in Raleigh (USA). These pollutants significantly harm human health and the environment. Particles are mainly of black carbon (soot), nitrogen oxides contribute to the formation of ground level ozone. Both the respiratory system, probably also causes other serious health problems.
"These requirements related to new technologies to control emissions, increased costs owners and operators of trucks. roosevelt towers Therefore, we wanted to know whether brought roosevelt towers any real benefit. We found that indeed there was a huge drop in emissions of particulate matter and oxides of nitrogen, roosevelt towers "said Christopher roosevelt towers Frey.
With Gurdasom Sandhuom examined portable device to measure emissions fumes trucks while driving on normal roads and highways. roosevelt towers Government emission requirements relate only to new trucks roosevelt towers - thus the difference in vehicles manufactured in 1999 and 2010.
Tractor emissions, corresponding standards of 1999, achieved typically 0.22 grams of particulate matter and oxides of nitrogen 110 grams per gallon of fuel. (1 American gallon = 3.8 liters approx.) Typical emission tractor, to meet the new standards were much lower. Vehicles manufactured in 2010 produced roosevelt towers only 2 grams of nitrogen oxides per gallon of fuel, a decrease of 98 percent. Their particulate emissions fell by 95 percent per gallon of fuel.
Nitrogen emissions have decreased mainly due to the introduction of recirculated exhaust emissions and their catalytic reduction technologies. Particles through the filter in the exhaust. "Although these technologies are the owners of the trucks roosevelt towers pretty big investment, this research has shown that achieving a remarkable decrease in emissions of contaminants that have meaningful consequences for human health and the environment," said Christopher Frey.
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