Wszystkie pola: NOx pollution - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Analysis and Measurement of NOx Emissions in Port Auxiliary Vessels
Autorzy:: Melo, G.
Murcia, J. C.
Powiązania:: https://bibliotekanauki.pl/articles/116827.pdf
Data publikacji:: 2013
Wydawca:: Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:: Port Auxiliary Vessels
NOx pollution
NOx Emission
mechanical engineering
Engine Characteristics
Emission Factor
Emission Reduction
Exhaust Gas Cleaning Systems
Opis:: This paper is made NOx pollution emitted by port auxiliary vessels, specifically by harbour tugs, due to its unique operating characteristics of operation, require a large propulsion power changes discontinuously, also possess some peculiar technical characteristics, large tonnage and high propulsive power, that differentiate them from other auxiliary vessels of the port. Taking into account all the above features, there are no studies of the NOx emission engines caused by different working regimes of power because engine manufacturers have not measured these emissions across the range of operating power, but usually we only report the pollution produced by its engines to a maximum continuous power.
Źródło:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2013, 7, 3; 421-429
2083-6473
2083-6481
Pojawia się w:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Flow charateristics of a low NOx emission burner
Autorzy:: Kardaś, A.
Golec, S.
Powiązania:: https://bibliotekanauki.pl/articles/1965147.pdf
Data publikacji:: 2005
Wydawca:: Politechnika Gdańska
Tematy:: combustion
pulverized coal burner
NOx
SO2
environmental pollution
sulphur corrosion
Opis:: Recent technological changes in the Polish power industry have created opportunities for reducing NOx and CO emissions, but - at the same time - created another operation problem: sulphur corossion of boilers' rear water-wall. This has been the motivation for performing a detailed study of the air flow and pulverized coal transport in low-NOx burners. A measuring stand was built inside a real medium power OP-230 boiler equipped with a low-NOx burner to measure the velocity field at the burner's outlet and to prepare experimental characteristics of the burner. To extend the description, a numerical model of the burner was constructed and numerical calculations were executed by means of the Fluent program. Numerically calculated velocity profiles were compared with the results of measurements. Further investigations of the low NOx burner included the flow of the air-pulverized coal mixture. The measured concentration of the coal dust was compared with numerically predicted distribution of particles. Both the measurements and the calculations have shown a highly non-uniform concentration of particles at the burner outlet. The obtained results have been helpful in formulating recommendations to improve burner geometry.
Źródło:: TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2005, 9, 1; 65-79
1428-6394
Pojawia się w:: TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Modern diesel engines NOx particles emission
Autorzy:: Krakowian, K.
Kaźmierczak, A.
Wdowikowska, A.
Powiązania:: https://bibliotekanauki.pl/articles/245526.pdf
Data publikacji:: 2013
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: air pollution
combustion engines
EGR valve
exhaust emission & ecology
vehicles
Opis:: Exhaust gases recirculation systems (EGR), together with catalytic reactors, are commonly installed in modern piston combustion engines. Their purpose is to reduce the amount of nitrogen oxides (NOx) emitted in fumes. The need for this reduction takes its source from introducing more rigorous EURO standards, which are treating about maximum levels of NOx, HC and particulates produced, as a side effect of engine's operation. Applied exhausts recirculation circuits can be roughly characterized by a principle, that a part of exhaust gases is redirected (through a cooler) and reaches a special valve. This valve, respectively to engine's current load and speed, drives more or less exhaust to suction manifold. The position of the valve determines the system’s overall efficiency, but also differentiates the amount of toxic gases and smoke produced by each of the engines cylinders. Recent research have focused only on the overall efficiency of recirculation systems, representing it by measuring the total amount of NOx particles emission from exhaust pipe. However, the quantity of exhaust gases that is reaching each cylinder can be negatively dependant on EGR valve’s physical position in the circuit. This happens due to the fact that combusted loads have different proportions of charged air and fuel. For estimating the difference among each of the loads, and in the same time, indirectly, in equal emission of NOx from corresponding cylinders, a research was carried out on a model VW 2.0 TDI engine, equipped with standard, factory mounted, exhausts gases recirculation circuit. Measurements of toxic emissions were executed with regards to thirteen-point ESC (European Stationary Cycle) test.
Źródło:: Journal of KONES; 2013, 20, 3; 245-250
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Cold air flow characteristics of a low NOx axial swirl burner
Charakterystyki przepływu zimnego powietrza dla niskoemisyjnego osiowego palnika wirowego (LNASB)
Autorzy:: Golec, S. J.
Powiązania:: https://bibliotekanauki.pl/articles/212292.pdf
Data publikacji:: 2009
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
Tematy:: przepływ zimnego powietrza
niskoemisyjny osiowy palnik wirowy
NOx
SO2
LNASB
combustion
pulverised coal burner
environmental pollution
sulphur corrosion
Opis:: Recent technological changes in the Polish power industry have created opportunities for reducing NOx, CO, SO2 emissions, but - at the same time - created another operation problem: sulphur corrosion and erosion of boilers’ water-walls as well decreasing of the boiler’s efficiency. This has been the motivation for performing a detailed study of the air flow in low-NOx burners. A measuring stand was built inside a real medium power OP-230 boiler equipped with a low-NOx burner to measure the velocity field at the burner’s outlet and to prepare experimental characteristics of the burner. To extend the description, a numerical model of the burner was constructed and numerical calculations were executed by means of the Fluent program. Numerically calculated velocity profiles were compared with the results of measurements. The obtained results have been helpful in formulating recommendations to improve burner geometry.
Obecne zmiany technologiczne w polskich elektrowniach i electrociepłowniach stworzyły szanse do redukcji emisji NOx, CO oraz SO2 ale jednocześnie przyczyniły się do powstania nowych problemów eksploatacyjnych takich jak np.: korozji siarkowej i erozji płaszczy kotłów jak i również obniżenia sprawności pracy kotłów. Powyższe problemy były motywacją do dogłębnej analizy przepływu powietrza w niskoemisyjnych palnikach wirowych. Stanowisko pomiarowe przeznaczone do wyznaczania pola prędkości uwylotu z palnika oraz charakterystyk pomiarowych palnika było stworzone w rzeczywistym kotle OP-230 wyposażonym w nisko emisyjny palnik. Do poszerzenia opisu zbudowano numeryczny model palnika, a obliczenia numeryczne były wykonane za pomocą pakietu oprogramowania o nazwie Fluent. Rezultaty tych obliczeń numerycznych były porównane z pomiarami. Otrzymanane wyniki były pomocne w tworzeniu wytycznych modernizacji palnika.
Źródło:: Prace Instytutu Lotnictwa; 2009, 5 (200); 50-59
0509-6669
2300-5408
Pojawia się w:: Prace Instytutu Lotnictwa
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Development of Emission to Air in Central Europe
Autorzy:: Pokrývková, Jozefína
Jurík, Ľuboš
Powiązania:: https://bibliotekanauki.pl/articles/123163.pdf
Data publikacji:: 2019
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: air quality
emission NOx
PM10
PM2,5
air imission
pollution modelling
Opis:: The present state of air quality is determined according to emission and imission situation of basic pollutants. According to the obtained information about the state of air quality, the development of imission and emission presently exhibits a decreasing tendency caused especially by industrial production innovations in European countries, with slight rises in renewable energy sources for electricity production, but especially the effort to improve the condition relates to the use of mandatory quotas and pollution charges in the European Union. The aim of the this article is to review the emission development in the year 1998 up to 2013 for Central European countries – Slovakia, Czech Republic and Poland and their comparison to the European average value of the released emission. The NOx and particulate matter PM₁₀, PM_2,5 were evaluated as pollutants, which over the last few years have contaminated the air and in particular the main environment.
Źródło:: Journal of Ecological Engineering; 2019, 20, 2; 51-57
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Estimation of nox conversion into oxide, platinum and combined oxide - platinum SCR catalyst
Autorzy:: Kamela, W.
Kruczyński, S.
Powiązania:: https://bibliotekanauki.pl/articles/246547.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: combustion engines
catalytic reactors
selective reduction
nitric oxides
air pollution
Opis:: The paper contains the results of the tests of the oxide, platinum and combined oxide-platinum catalytic reactor model used in the NH3-SCR system. As regards the combined oxide-platinum catalyst the first reactor block was extracted from the oxide catalyst used in trucks. As the second module of the reactor a block with platinum acting as a catalyst was used with 2.5g/dm3 platinum load. The only differences between the combined reactor system and the single platinum and oxide catalysts were connected with the reactors volume which in the case of the single reactors was two times higher than the volume of the corresponding blocks of the combined system. During the tests the ammonia concentration in the engine exhaust gases at the inlet of the reactors was set to 400 ppm. The article contains the results of the physical and chemical active surface structure tests of the reactors with their active surface chemical microanalysis and its topographic pictures performed and taken with the Scanning Electron Microscope. The results obtained from the tests of the influence of the reactor type on the NOX and NO conversion and the content of NO2 in NOX are presented in this article in the form of the function of their operating temperature. Additionally, the results of measured ammonia slip at the outlet of the reactors are presented. The obtained results have shown that the usage of the combined oxide-platinum reactor allows for widening the SCR system effective operating temperature range with a low ammonia slip at its outlet. This was achieved by use of the platinum reactor block which features a high nitric oxides conversion efficiency at the operating temperatures which are lower than those of the oxide catalyst and which can also provide the high ammonia spices conversion rangeto lower the ammonia slip at system outlet.
Źródło:: Journal of KONES; 2012, 19, 3; 195-202
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Comparison of reduction systems of harmful substances into the atmosphere in accordance to requirements of IMO Tier III
Autorzy:: Czmyr, Stanisław
Kaminski, Piotr
Powiązania:: https://bibliotekanauki.pl/articles/247763.pdf
Data publikacji:: 2019
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: NOx
SOx
MARPOL
atmosphere pollution
marine transportation
dual fuel
Opis:: Degradation of the environment is nowadays believed to be the most alarming problem that needs to be solved. Global warming and environmental pollution are predicted to cause a catastrophic chain reaction leading to species extinction, mass emigration due to rising sea levels and global crisis. The only solution suggested by international organizations is the immediate reduction of greenhouse gases and other harmful substances. Marine transportation harmful substances into the atmosphere are recognized to be a significant source of global atmospheric pollution. Despite the high efficiency of marine diesel engines, their impact on the environment is considerable. Due to environmentally friendly policies, modern engines concerns about not only efficiency but also mainly about s aspects. This article analyses and compares marine s exhaust gases reduction methods. Especially the most harmful substances emitted by ships were taken into consideration. The article presents the most crucial law regulations of harmful substances to the atmosphere, pointing at actual and possible future implementations. The most complex methods allowing meeting the latest limits were presented. Pros and cons of available control methods were thoroughly described and methods were compared. The most adequate methods form the effectiveness and economical point of view was pointed out.
Źródło:: Journal of KONES; 2019, 26, 3; 7-14
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Emisja CO i NO_x pochodzących z silników spalinowych pojazdów samochodowych na tle norm euro
CO and NOx emission from vehicles engines, in the light of the euro norm
Autorzy:: Kwaśniak, U.
Janicki, M.
Kolanek, C.
Powiązania:: https://bibliotekanauki.pl/articles/193170.pdf
Data publikacji:: 2012
Wydawca:: Stowarzyszenie Inżynierów i Techników Komunikacji Rzeczpospolitej Polskiej
Tematy:: emisja zanieczyszczeń
silnik spalinowy
wskaźnik emisji
europejski standard emisji spalin
pollution emission
IC engine
emission factor
European emission standard
Opis:: Dynamiczny rozwój komunikacji samochodowej jest wyraźnie odczuwalny przez środowisko naturalne, jak również przez człowieka (zarówno w aspektach pozytywnych, jak i negatywnych). W wyniku spalania paliw w silnikach spalinowych powstaje emisja zanieczyszczeń mająca negatywny wpływ na otoczenie. Mając na uwadze ideę zrównoważonego rozwoju w zakresie transportu drogowego, na etapie planowania i podejmowania decyzji, konieczne jest wykonanie ocen wpływu przedsięwzięcia na środowisko, uwzględniając stan tła, będący jej odniesieniem. W niniejszym opracowaniu opisano analizę emisji CO i NO_x pochodzących z pojazdów samochodowych, wyznaczoną za pomocą obowiązujących wskaźników emisji oraz zarejestrowanego (rzeczywistego) składu jakościowo-ilościowego ruchu drogowego dla wybranego odcinka drogi krajowej we Wrocławiu. Wyniki obliczeń przedstawiono i porównano w podziale na zarejestrowane kategorie pojazdów, a także wyznaczając udział wartości emisji określonej za pomocą wskaźników emisji w wartości emisji wyznaczonej za pomocą norm Euro. Najmniejszą różnicę emisji, w rozbiciu na grupy pojazdów, obserwuje się dla samochodów osobowych i busów do transportu osób, natomiast największa rozbieżność, względem wyników obliczonych omawianymi sposobami, występuje w przypadku samochodów ciężarowych. Należy jednak zwrócić uwagę, że opracowywane wskaźniki emisyjne określają w sposób uśredniony każdą z grup pojazdów poruszających się w kraju. Natomiast wartości emisji obliczone za pomocą wartości granicznych - europejskiego standardu emisji spalin, uwzględniają grupę rzeczywiście poruszających się pojazdów po analizowanym odcinku drogi i odpowiadający im najwyższy dopuszczalny poziom emisji.
The dynamic expansion of road transport is clearly noticeable by natural environment and by human being (with its positive and negative aspects). Pollution emission with its negative impact on the environment results from fuel combustion in motor engine. Taking into consideration the sustainable statement in scope of road transport, it is necessary to prepare the Environmental Impact Assessment (considering state of environmental background) during the stages of planning and taking decison. This thesis describes CO and NO_x emission from road vehicle estimated by current valid emission indicators and noting down traffic quantitative-qualitative composition for the selected section of roads in Wrocław. Results of calculation were presented in terms of elass of vehicles and compared to each other. The least difference in emission, considering different groups of vehicles, is observable for passenger cars and small buses (passenger vans). The biggest discrepancy - in regard to results achieved by aforementioned emission estimation - was noticed for lorries (trucks, heavy duty vehicles). It is important to pay attention to the fact that emission indicators show averaged results for all groups of vehicles moving around a country. At the same time European emission standards are based on more strict estimation methods that take into account number of cars from a specific group moving within an analyzed section of the road and their highest allowed emission level (approved limits of their emission).
Źródło:: Transport Miejski i Regionalny; 2012, 8; 22-25
1732-5153
Pojawia się w:: Transport Miejski i Regionalny
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Estimation of the oxide catalyst volume and the cells quantity influence on CO, HC and NOx conversion in the AVL boost computing application
Autorzy:: Kruczyński, S.
Kamela, W.
Duniec, K.
Powiązania:: https://bibliotekanauki.pl/articles/242900.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: combustion engines
catalytic reactors
simulation
air pollution
environmental protection
Opis:: The article contains the results of the simulation tests of oxidizing catalytic reactor obtained by use of the AVL Boost simulation application. The chemical reactions and the reactions rates on which computations were based are specified in this paper. The simulations were related to the influence of the catalytic reactor volume and reactor’s cells quantity influence on the carbon oxide, hydrocarbons and nitric oxides conversion levels. The influence on the nitric oxides conversion was presented in this paper as the content of NO and NO2 in NOX. The simulated computations were performed separately for the variable reactor volume ranging from 1 to 2.2 dm3 with a step of 0.4 dm3 and for the variable reactor cells quantity ranging from 200 to 600 cells per square inch with a step of 100 cpsi. As the input data for the simulation computations the actual values of the toxic compounds concentrations in the exhaust gases at the outlet of the Diesel engine were used. The measurements of the toxic compounnds were made at the chosen engine steady state work points and are presented in this paper as a graph of the toxic gases concentrations in the form of the function of the engine torque. The simulation computaitons were performed for the same points and their results are also presented in the form of the function of the engine torque. The Results presented in this paper have shown that the increase in the CO, HC and NOX conversion in the case of the oxide catalyst can be obtained both by increasing the reactor volume and its cells quantity. It also have been observed that the increase in the reactor cells quantity and volume is not proportional as regards the toxic gases conversion increase and lowers in the case of higher values of the simulated reactor parameters.
Źródło:: Journal of KONES; 2012, 19, 4; 347-353
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: The impact of particulate matter (PM) and nitric oxides (NOx) on human health and an analysis of selected sources accounting for their emission in Poland
Autorzy:: Krzeszowiak, Jakub
Stefanow, Damian
Pawlas, Krystyna
Powiązania:: https://bibliotekanauki.pl/articles/767079.pdf
Data publikacji:: 2016
Wydawca:: Instytut Medycyny Wsi
Tematy:: air pollution
human health
nitric oxides
particulate matter
Opis:: Introduction and objective: This paper is concerned with the harmful impact of nitric oxides (NOx) and particulate matter (PM) on humans. The objective was to determine which source of emission is the most urgent in terms of its reduction.Abbreviated description of the state of knowledge: In published epidemiological studies multiple notifications indicating the harmful impact of particulate matter on human health can be found. The harmful impact is underscored by the increase in the number of hospitalisations owing to diseases of respiratory and cardio-vascular systems, as well as by the rise in general fatality rate. The analysis of the PM impact on the human body is prompted by the fact that its detrimental effects are not clearly defined. Additionally, nitric oxides contribute to the increased number of exacerbations of respiratory disease and are a factor increasing susceptibility to development of local inflammation. Conclusions: The following study is meant to show that the air pollution which derives from vehicles (NOx and PM) has a significant impact on human health. This applies particularly to residents of cities and big towns. This issue has gained special importance in Poland. According to the data from the Central Statistical Office, the increasing number of vehicles in use and their age lead to increased emission of the pollutants considered.
Źródło:: Medycyna Środowiskowa - Environmental Medicine; 2016, 19, 3; 7-15
1505-7054
2084-6312
Pojawia się w:: Medycyna Środowiskowa - Environmental Medicine
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Influence of Pollutants from Transport on Life Expectancy in the EU Countries
Wpływ zanieczyszczeń pochodzących z transportu na długość życia w krajach UE
Autorzy:: Rozehnalová, Hana
Mádr, Michal
Formanová, Lucie
Andrlík, Břetislav
Powiązania:: https://bibliotekanauki.pl/articles/1840979.pdf
Data publikacji:: 2021
Wydawca:: Polska Akademia Nauk. Komitet Człowiek i Środowisko PAN
Tematy:: air pollution
life expectancy
human health
NOx
SOx
zanieczyszczenia powietrza
długość życia
ludzkie zdrowie
Opis:: Road transport has become the major source of environmental pollution and it is also one of the biggest environmental risks in the EU countries. Good air quality is very important for population as pollutants have negative impacts on human health. The paper deals with relationship between air pollutants generated by road transport and the life expectancy in EU countries. At the beginning of the paper the main pollutants from motor vehicles are described and impact on human health is summarized too. We use regression analysis of panel data to analyse the relationship between chosen air pollutants and life expectancy. Our results show negative impacts of nitrogen oxide and sulphur oxide, specifically reduction in life expectancy by 1.49 years for nitrogen oxides and 0.28 years for sulphur oxides with an increase of the pollutant by 1%. So according to our findings economic policy makers should focus primarily on the reduction of nitrogen and sulphur oxides.
Transport drogowy stał się głównym źródłem zanieczyszczeń i jednym z największych zagrożeń dla środowiska w krajach UE. Dobra jakość powietrza jest bardzo ważna dla populacji, ponieważ zanieczyszczenia mają negatywny wpływ na zdrowie ludzi. Artykuł dotyczy związku między zanieczyszczeniami powietrza wytwarzanymi przez transport drogowy a oczekiwaną długością życia w krajach UE. Na początku artykułu opisano główne zanieczyszczenia pochodzące z pojazdów samochodowych oraz podsumowano wpływ na zdrowie ludzi. Wykorzystujemy analizę regresji danych panelowych do analizy związku między wybranymi zanieczyszczeniami powietrza a oczekiwaną długością życia. Nasze wyniki pokazują negatywny wpływ tlenku azotu i tlenku siarki na zdrowie, w szczególności na skrócenie oczekiwanej długości życia o 1,49 roku w przypadku zanieczyszczenia tlenkami azotu i 0,28 roku w przypadku zanieczyszczenia tlenkami siarki, przy wzroście zanieczyszczenia o 1%. Zgodnie z naszymi ustaleniami decydenci polityczni powinni skupić się przede wszystkim na redukcji poziomu tych zanieczyszczeń.
Źródło:: Problemy Ekorozwoju; 2021, 16, 1; 209-217
1895-6912
Pojawia się w:: Problemy Ekorozwoju
Dostawca treści:: Biblioteka Nauki