Temat: controlled combustion - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Porównanie wielkości emisji zanieczyszczeń dla różnych opcji spalania odpadów
Comparison of emissions levels value for different options of waste incineration
Autorzy:: Głodek, E.
Powiązania:: https://bibliotekanauki.pl/articles/392049.pdf
Data publikacji:: 2011
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Ceramiki i Materiałów Budowlanych
Tematy:: spalania odpadów
warunki procesu
spalanie kontrolowane
emisja zanieczyszczeń
waste incineration
process conditions
controlled combustion
emission of air pollutants
Opis:: W wyniku spalania odpadów do atmosfery emitowane są różne szkodliwe substancje. Wielkość emisji zanieczyszczeń uzależniona jest od rodzaju paliwa, jego parametrów fizykochemicznych, technik spalania i wydajności systemów oczyszczania gazów. Instalacje przemysłowe spalające lub współspalające odpady obowiązują europejskie standardy emisyjne. W przypadku niekontrolowanego spalania odpadów na wolnym powietrzu (tzw. open burning), wielkość emisji zanieczyszczeń jest zdecydowanie większa niż w przypadku spalania w układach energetycznych. W pracy porównano wielkości emisji zanieczyszczeń w przypadku niekontrolowanego i kontrolowanego spalania odpadów.
Pollutions are emitted into the atmosphere from incineration of municipal waste. The emissions depends on the type of fuel, its physico-chemical parameters, combustion's techniques and efficiency of gas cleaning systems. Waste incinerating plants have a duty to comply with european emission standards. Open burning emissions of pollutants is much higher than for incinerating. The study compares the emission of pollutants in the case of uncontrolled and controlled burning of waste.
Źródło:: Prace Instytutu Ceramiki i Materiałów Budowlanych; 2011, R. 4, nr 7, 7; 89-96
1899-3230
Pojawia się w:: Prace Instytutu Ceramiki i Materiałów Budowlanych
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Simulation of the combustion process in the electronically controlled marine diesel engine
Autorzy:: Kluj, S.
Powiązania:: https://bibliotekanauki.pl/articles/243056.pdf
Data publikacji:: 2014
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: marine diesel engines
simulation
combustion engines
electronically controlled engines
Opis:: The introduction of the electronically controlled low-speed diesel engines has raised a number of new problems - caused mainly by the influence of these electronic system settings on the combustion process. The wide set of the combustion press settings is now available for the chief engineers on the board of the ship and for the shipyard experts during the sea trials. This opens many new possibilities for the combustion process optimization but also causes the danger of the serious engine malfunction due to the improper settings. The paper presents the mathematical model of the electronically controlled low-speed marine diesel engine ant the special attention is paid to the available settings of the combustion process. The effective compression ratio, the injection timing and the exhaust valve setting can be adjusted in a similar manner like in the actual engine. The combustion pressure curves, the mean indicated pressure, the exhaust gas temperature can be observed when changing the combustion settings. The paper describes in detail the results of the several most typical simulations like change of the given combustion pressure increase, the change of the effective compression ratio, the change of the exhaust valve opening timing and the change of the maximum load setting.
Źródło:: Journal of KONES; 2014, 21, 4; 233-238
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: A study of combining gasoline engine downsizing and controlled auto - ignition combustion
Autorzy:: Moxey, B.
Cairns, A.
Ganippa, A.
Zhao, H.
Bassett, M.
Powiązania:: https://bibliotekanauki.pl/articles/248026.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: road transport
combustion engines
fuel economy
controlled auto-ignition
downsizing
Opis:: In recent years European automotive CO2 emissions targets have largely been met through increased diesel sales. However, the distillation of crude oil results in high proportions of both gasoline and diesel fuel and ultimately this has resulted in Europe being "diesel lean" at times. In order to meet future global emissions goals, in the short term it will be necessary to improve the fuel consumption of the gasoline engine and in the longer term source sustainable alternatives to crude oil. The objective of the current work was to investigate the optimum trade-off between the opposing engine operating requirements of gasoline engine downsizing and Controlled Auto-Ignition (CAI) combustion for use in a family-sized passenger car. Experimental fuel consumption and emissions data were produced for four sizes of spark ignition engine, varying from 1 to 2 litres in capacity. The additional benefits of two experimentally developed CAI operating methodologies were evaluated in each engine using drive cycle simulation software. The first CAI mode was based on novel use of combined internal and external EGR to attain higher loads. The second involved the adoption of turbocharging at part-load for yet higher output via so-called lean-boosted CAI. It was concluded that, for such a vehicle, a compromise exists where best fuel economy can be obtained from a moderately downsized CAI-capable engine. Compared to the baseline 2 litre engine, it was possible to obtain fuel economy benefit equivalent to that offered from an aggressively downsized 1 litre unit but using a moderately downsized 1.4 litre CAI engine, without the need for any complex boosted operation or expensive emissions aftertreatment systems. As capacity was reduced below 1.4 litres, the benefit of CAI diminished at an accelerated rate due to progressive failure to capture key higher load sites visited across the European drive cycle.
Źródło:: Journal of KONES; 2012, 19, 1; 289-300
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Numerical investigation on low calorific syngas combustion in the opposed-piston engine
Autorzy:: Pyszczek, R.
Mazuro, P.
Jach, A.
Teodorczyk, A.
Powiązania:: https://bibliotekanauki.pl/articles/133469.pdf
Data publikacji:: 2017
Wydawca:: Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:: opposed-piston
syngas
combustion
controlled auto-ignition
CAI
computational fluid dynamics
CFD
tłok przeciwbiezny
gaz syntezowy
spalanie
kontrolowany samozapłon
obliczeniowa dynamika płynów
Opis:: The aim of this study was to investigate a possibility of using gaseous fuels of a low calorific value as a fuel for internal combustion engines. Such fuels can come from organic matter decomposition (biogas), oil production (flare gas) or gasification of materials containing carbon (syngas). The utilization of syngas in the barrel type Opposed-Piston (OP) engine arrangement is of particular interest for the authors. A robust design, high mechanical efficiency and relatively easy incorporation of Variable Compression Ratio (VCR) makes the OP engine an ideal candidate for running on a low calorific fuel of various composition. Furthermore, the possibility of online compression ratio adjustment allows for engine the operation in Controlled Auto-Ignition (CAI) mode for high efficiency and low emission. In order to investigate engine operation on low calorific gaseous fuel authors performed 3D CFD numerical simulations of scavenging and combustion processes in the 2-stroke barrel type Opposed-Piston engine with use of the AVL Fire solver. Firstly, engine operation on natural gas with ignition from diesel pilot was analysed as a reference. Then, combustion of syngas in two different modes was investigated – with ignition from diesel pilot and with Controlled Auto-Ignition. Final engine operating points were specified and corresponding emissions were calculated and compared. Results suggest that engine operation on syngas might be limited due to misfire of diesel pilot or excessive heat releas which might lead to knock. A solution proposed by authors for syngas is CAI combustion which can be controlled with application of VCR and with adjustment of air excess ratio. Based on preformed simulations it was shown that low calorific syngas can be used as a fuel for power generation in the Opposed-Piston engine which is currently under development at Warsaw University of Technology.
Źródło:: Combustion Engines; 2017, 56, 2; 53-63
2300-9896
2658-1442
Pojawia się w:: Combustion Engines
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Various designs of the two-stroke engine heads with the valve flushed system
Autorzy:: Łoza, Ł.
Kaźmierczak, A.
Borkowska, J.
Skorupa, P.
Krakowian, K.
Cienciała, M.
Powiązania:: https://bibliotekanauki.pl/articles/242546.pdf
Data publikacji:: 2015
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: engine
two-stroke
internal combustion
valve flushed system
piston-controlled cam
high petrol consumption
oil in the petrol
toxic by-products
loud noise
uneven running
low efficiency
Opis:: The two-stroke engines have never acquired the popularity of the four-stroke engines due to their inherent performance limitations. The tasks of many engineering teams were to find the basic causes, which resulted in the inferior performance of these engines. Today’s task is to build a two-stroke engine whose performance could match that of a four-stroke engine in areas of common use. The most typical performance problems of a two-stroke engine are high petrol consumption caused by low efficiency, toxic by-products of combustion being emitted into the atmosphere (caused by oil present in the petrol), and uneven and loud engine noise. The greatest challenge is to achieve a good chamber purge during one stroke in which the fresh fuel mixture flows through the piston-controlled inlet port while at the same time the fumes are being exhausted through the outlet port. This in contrast with the four-stroke engines where the intake and exhaust are each done with two separate strokes. From the energy point of view, the two-stroke engine is not efficient because a certain amount of fresh fuel is being wasted in the exhaust fumes. We propose to replace the piston-controlled cam with the valve-flushed system, which will cause the combustion process to become more efficient. The purpose of this paper is to present various designs of the engine heads and analyse their performance. The goal of this proposal is to choose the best combination of these engine heads in order to achieve the optimum overall engine performance.
Źródło:: Journal of KONES; 2015, 22, 4; 187-190
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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