Wyniki wyszukiwania - Biblioteka Nauki

1

Evaluation of pollutant emissions from a railbus in real operating conditions during transport work

100%

Rymaniak Ł. , Wiśniewski S. , Woźniak K. , Frankowski M.

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tom R. 62, nr 3

84--88

EN

The article discusses issues related to the assessment of pollutant emissions from a railbus during transport work. The test object was a rail vehicle equipped with two diesel engines with a total power of 780 kW, Stage IIIB homologated. Measurements were carried out on the route Poznań-Wągrowiec in two directions. During the tests, the vehicle performed a transport service, where the number of passengers was counted. For the completed cycles, the average number of people was 82 and 18. Based on the obtained data, the vehicle operating conditions and emission indicators were analyzed, which were related to the number of passengers. A dimensionless toxicity index was also determined.

2

Tests of ecological indicators of two-way vehicles meeting Stage IIIB and Stage IV standards in real operating conditions

88%

Merkisz J. , Rymaniak Ł. , Lijewski P. , Kamińska M. , Kurc B.

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tom Nr 1

1--9

EN

The article presents the tests and analysis of ecological indicators of two rail-road tractors carried out during the real operation. The conditions of tests and vehicle constructions were characterized by the similar parameters, while the objects met the different exhaust gas emission standards: Stage IIIB and Stage IV. Apparatus from the PEMS group was used in the tests. In the analysis of ecological indicators, the unit emission of harmful gaseous compounds and particulates was determined. The supplementation is the assessment of toxicity indicators, which are the reference of individual compounds to CO2 emission. More favourable ecological characteristics were obtained by a vehicle meeting the newer exhaust gas emission standard, which resulted mainly from the use of advanced exhaust gas treatment systems in its construction.

PL

W artykule zaprezentowano badania i analizę wskaźników ekologicznych dwóch ciągników szynowo-drogowych zrealizowane podczas rzeczywistej eksploatacji. Warunki testów i konstrukcje pojazdów charakteryzowały się zbliżonymi parametrami, przy czym obiekty spełniały odmienne normy emisji spalin: Stage IIIB i Stage IV. W badaniach zastosowano aparaturę z grupy PEMS. W analizie wskaźników ekologicznych wyznaczono jednostkową emisję szkodliwych związków gazowych i cząstek stałych. Uzupełnienie stanowi ocena wskaźników toksyczności, będących odniesieniem poszczególnych związków do emisji CO2. Korzystniejsze charakterystyki ekologiczne uzyskał pojazd spełniający nowszą normę emisji spalin, co wynikało przede wszystkim z zastosowania w jego konstrukcji zaawansowanych układów oczyszczania spalin.

3

Measurement of Exhaust Emissions from a Two-Wheeler – an Experimental Validation of the Remote-Sensing Method

88%

Rymaniak Ł. , Mąka M. , Szymlet N. , Kamińska M. , Kęska A.

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tom Vol. 24, nr 12

60--71

EN

The paper presents the problem of testing vehicles, which are some of the main sources of air pollution. The authors suggested the remote-sensing method as a tool for the measurement of the vehicle exhaust emissions and an on-going control thereof. This is an economical solution that allows measuring a large number of vehicles in a short time. The presented work aims at an experimental validation of the measurement method of exhaust emissions on the example of a two-wheeler. To that end, two parallel laboratory tests were carried out: measurement of the exhaust emissions obtained directly from the tailpipe using the PEMS (Portable Emission Measurement System) equipment and from the exhaust cloud, utilizing a module emission gate. A significant mutual correlation of the results confirms the efficiency of the method. The highest value of the coefficient of determination was obtained for the CO2, PM and NO analyzers. Different orders of values were primarily caused by the dissipation of the exhaust gas and the influence of the ambient conditions on the measurement process. Further works are therefore necessary to allow an assessment of the actual measurement uncertainty of the equipment irrespective ofthe fueling system and type of vehicles.

4

Impact of the use of comfort devices on the exhaust emission from a hybrid vehicle

75%

Siedlecki M. , Merkisz J. , Kubiak K. , Rymaniak Ł. , Dobrzyński M. , Gallas D.

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2019

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tom R. 58, nr 4

280--285

EN

Vehicles are equipped with more and more devices to improve the comfort of traveling. They are usually powered by electricity generated by the engine, which translates into an increase in its loads and, as a consequence, fuel consumption and emission. However, there is no information about the possible increase in the amount of other harmful components contained in the exhaust gases. Often this result is inadequate to that obtained during the operation of the vehicle, where the obtained fuel consumption is higher. As part of this article, tests were carried out in real hybrid vehicle traffic conditions on the same test route using an analyzer from the PEMS (Portable Emission Measurement System) ¬ SEMTECH DS Sensors Inc. The analysis of gaseous components of exhaust gases together with the exhaust mass flow probe and the GPS system made it possible to calculate the pollutant emission. On this basis, the actual mileage fuel consumption of the tested vehicle was calculated using the road emission of carbon-containing compounds (carbon balance method).

5

Analysis of harmful compounds concentrations in the exhaust behind a vehicle with compression ignition engine

75%

Kamińska M. , Szymlet N. , Fuć P. , Rymaniak Ł. , Lijewski P. , Grzeszczyk R.

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2024

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tom R. 63, nr 2

50--55

EN

The article presents issues related to the assessment of concentrations of harmful substances in the exhaust gas cloud behind a compression-ignition passenger vehicle. The introduction describes issues related to the impact of air pollution on the environment and on human health and life expectancy. The article presents exhaust gas dispersion tests behind the vehicle were carried out both in stationary conditions (a specially prepared laboratory stand) and in real operating conditions. PEMS testing equipment was used for this type of measurements. During the measurements, concentrations of harmful exhaust gas compounds were analyzed in relation to the distance of the measuring probe from the exhaust system. In stationary conditions, the influence of the engine speed on the dispersion of pollutants was also studied. The tests carried out show that the concentrations obtained behind a moving vehicle significantly decrease with the distance of the measuring probe, and their dispersion is much smaller in most cases than in the case of stationary tests. This is the basis for recognizing that thanks to this, it is possible to analyze the concentrations obtained and conduct tests using the emission gate.