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Effect of air pollution on visibility in urban conditions. Warsaw case study

Majewski G., Czechowski P O, Badyda A., Brandyk A.

Environment Protection Engineering

2014

Vol. 40, nr 2

47--64

The influence of air pollutants on visibility in Warsaw Agglomeration has been investigated. Following pollutants were considered: PM10, SO2, NO2 and O3, while meteorological parameters included: air temperatures (mean, minimum, maximum), solar radiation, relative air humidity, rainfall rates and wind speed. Initial analyses were performed with the use of principal component analysis (PCA). In next stages, the logistic regression (LR), the analysis of variance (ANOVA), one-way classification and a model path of generalized regression models (GRM) were applied. PCA analysis showed that in the cold season the visibility index depends on PM10, SO2, NO2 and the temperatures: T, Tmin, and Tmax. In the warm season, the index of visibility is mostly shaped by four elements: O3, T, Tmax and solar radiation. Logistic regression model indicated that in the warm season only two variables are significantly related to visibility: PM10 and relative humidity of air. Regularities in the cold season shown by the LR correspond with the conclusions from the PCA. Among meteorological conditions, the most important is air temperature, but only Tmax preserves the same direction of influence as the one pointed by the PCA model.

Badania emisji cząstek stałych w gazach wylotowych silnika turbospalinowego GTD-350

Dutczak J.

Silniki Spalinowe

2011

R. 50, nr 3

W artykule przedstawiono wstępne badania emisji cząstek stałych w gazach wylotowych silnika turbospalinowego GTD-350. Badania przeprowadzono na stanowisku pomiarowym przy użyciu analizatora cząstek stałych TEOM Horiba wyposażonego w mini-tunel rozcieńczający Micro Diluter 6100. Celem badań było sprawdzenie przydatności tego analizatora do oceny jednego z parametrów gazów wylotowych silnika turbospalinowego. Pomiary wykonano po uprzedniej adaptacji analizatora, przeznaczonego w założeniu do badań silników tłokowych.

The preliminary investigations of particle matter emission in the exhaust gas of GTD-350 turbine engine have been presented in article. Investigations have been led on the test stand by use of particle analyzer TEOM Horiba, equipped with Micro Diluter 6100. The aim of investigations was to check the usability of that analyzer to evaluation of one of the turbine engine exhaust gas parameters. The measurements were performed after previous adaptation of that analyzer originally dedicated to piston internal combustion engines.