Temat: combustion efficiency - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Possibility of Improving Air Distribution and Heat Flow Conditions in Mechanical Grate Furnaces
Autorzy:: Kozioł, Michał
Kozioł, Joachim
Powiązania:: https://bibliotekanauki.pl/articles/27314774.pdf
Data publikacji:: 2022
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: combustion
mechanical grate
furnace adjustment
furnace retrofit
low-emission combustion
combustion efficiency
air distribution
spalanie
ruszt mechaniczny
regulacja paleniska
modernizacja pieca
spalanie niskoemisyjne
efektywność spalania
dystrybucja powietrza
Opis:: One group of plants commonly used for solids combustion are grate furnaces. These furnaces come in numerous design solutions, dedicated to fuels with different properties and plants with different capacities. The use of grate furnaces presents the as-yet unresolved challenge of how to ensure the most favourable air distribution along the length of the grate. The paper proposes a design solution to ensure proper air distribution along the length of the grate. An additional advantage of the proposed solution is the intensification of heat exchange in the furnace, enabling the boiler's circulating medium to be heated more efficiently. Both of the advantages allow an increase in the energy efficiency of the plant and therefore contribute to a reduction in the amount of fuel burned and CO2 emissions.
Źródło:: Civil and Environmental Engineering Reports; 2022, 32, 3; 248--259
2080-5187
2450-8594
Pojawia się w:: Civil and Environmental Engineering Reports
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 2.

Tytuł:: Analiza wpływu składu chemicznego biopaliwa na właściwości eksploatacyjne silnika
Analysis of the impact of biofuel chemical composition on the exploitation properties of combustion engine
Autorzy:: Olchowik, W.
Struś, M.
Powiązania:: https://bibliotekanauki.pl/articles/208609.pdf
Data publikacji:: 2011
Wydawca:: Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:: biokomponent
cyklodyna
Bioxdiesel
efektywność i sprawność procesu spalania
biocomponents
cyklodyne
effectiveness and efficiency of combustion process
Opis:: W publikacji dokonano porównania efektywności energetycznej procesów spalania w silniku o zapłonie samoczynnym zasilanym różnymi mieszankami paliw odnawialnych oraz tego samego silnika zasilanego standardowym olejem napędowym podczas pracy w stanach dynamicznych. Efektywność silnika i jakość spalania paliwa określono za pomocą pomiarów akceleracji wału korbowego silnika i zadymienia spalin, wykorzystując w pełni zautomatyzowane stanowisko badawcze realizujące zaprogramowaną serię pomiarów. Wielkości pola podaży energii oraz efektywności i sprawności procesu spalania określono za pomocą innowacyjnych metod przetwarzania i analizy danych.
The paper presents the comparison of combustion processes efficiency in diesel engine running on various renewable and standard fuel mixtures. Engine efficiency and the fuel combustion quality were determined by measuring the crankshaft acceleration and smoke levels. Fully automatized measurement system was used to conduct programmed set of measurements. The size of the energy area, effectiveness and efficiency of combustion process were determined using innovative data processing and analysis methods.
Źródło:: Biuletyn Wojskowej Akademii Technicznej; 2011, 60, 1; 94-108
1234-5865
Pojawia się w:: Biuletyn Wojskowej Akademii Technicznej
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 3.

Tytuł:: Multidimensional simulation of combustion and knock onset in gas engines
Autorzy:: Tatschl, R.
Priesching, P.
Schneider, J.
Powiązania:: https://bibliotekanauki.pl/articles/245656.pdf
Data publikacji:: 2018
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: gas engines
simulation
combustion
efficiency
knock onset
Opis:: Natural gas fuelled internal combustion engines enable efficient energy conversion with relatively low environmental impact. Depending on the specific application, the available fuel quality, and the emission regulations to be fulfilled, different types of gas-engine combustion systems are in use. The major performance and hence efficiency limiting factors in gas fuelled engines are related to the lower ignitability of natural gas at part load and the appearance of abnormal combustion (knock) at high load conditions. This article provides an overview of the multidimensional CFD simulation workflow for the investigation and assessment of flame propagation and knock onset characteristics in different types of natural gas fuelled internal combustion engines. The most common approaches for simulating flame propagation/combustion under engine conditions are presented together with selected models for describing the pre-flame reactions finally leading to knock onset in the unburned in-cylinder charge ahead of the flame. Based on selected application examples, the models’ performance and capabilities with respect to reflecting the essential characteristics of flame propagation and knock onset are presented.
Źródło:: Journal of KONES; 2018, 25, 2; 379-389
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 4.

Tytuł:: Analiza porównawcza ekogroszków węglowych z KWK Kazimierz-Juliusz i ZP Juliusz w świetle wyników badań fizykochemicznych i petrograficznych
Comparative analysis of qualified steam coal from Kazimierz-Juliusz Coal Mine and Juliusz Plant on the basis of physicochemical and petrographic studies
Autorzy:: Mirkowski, Z.
Jelonek, I.
Bierut, B.
Powiązania:: https://bibliotekanauki.pl/articles/394439.pdf
Data publikacji:: 2010
Wydawca:: Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
Tematy:: macerały węgla
niespalona materia organiczna
palenisko retortowe
efektywność spalania
macerals of coal
unburnt organic materials
stocker boiler
efficiency of combustion
Opis:: Węglowe paliwo kwalifikowane czyli ekogroszek to stosunkowo nowy produkt skierowany głównie do odbiorców indywidualnych, a jego pojawienie się jest związane z wprowadzeniem kotłów niskoemisyjnych z paleniskiem retortowym. Porównując najważniejsze cechy jakościowe ekogroszków można stwierdzić, iż w zakresie zawartości popiołu i siarki nieco lepiej prezentuje się produkt z kopalni Kazimierz-Juliusz. Natomiast pod względem kaloryczności lepsze parametry ma Ekoret z ZP Juliusz, który jednocześnie odznacza się większą spiekalnością, co może pogarszać efektywność spalania ekogroszku w palenisku retortowym. Wyniki badań petrograficznych potwierdzają znaczne zróżnicowanie opisywanych węgli. W groszku EcoKazimierz w równych proporcjach występują macerały grupy witrynitu i inertynitu, przy stosunkowo wysokim udziale liptynitu. Wysoki udział macerałów reaktywnych (witrynitu i liptynitu) korzystnie wpływa na proces spalania. W Ekorecie natomiast spotykamy się z zaskakująco wysoką (pow. 51%) zawartością inertynitu. Tak wysoka zawartość macerałów inertnych negatywnie wpływa na proces spalania obniżając sprawność kotłów.
Qualified steam coal called 'ekogroszek' is relatively a new product targeted mainly to residential customers. Its marketability was connected with the increase in the sales of low-emission stoker boilers. The comparison of the most important quantitative features of 'ekogroszek' shows that the product from Kazimierz-Juliusz Coal Mine is slightly better in terms of ash and sulphur contents, whereas 'Ekoret' from Juliusz Plant is better in respect of the calorific value. However, 'Ekoret' has higher coking properties and his may worsen the combustion efficiency in a stoker boiler. The results of petrographic studies confirm the significant differentiation between the two products. 'EcoKazimierz groszek' includes macerals of vitrinite and inertinite at the relatively high participation of liptinite. However the participation of reactive macerals such as vitrinite and liptinite has a positive influence on the combustion process, whereas 'Ekoret', which shows surprisingly high (over 51%) content of inertinite, can hale a negative effect on the thermal efficiency of boilers during the combustion.
Źródło:: Zeszyty Naukowe Instytutu Gospodarki Surowcami Mineralnymi i Energią PAN; 2010, 79; 315-325
2080-0819
Pojawia się w:: Zeszyty Naukowe Instytutu Gospodarki Surowcami Mineralnymi i Energią PAN
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 5.

Tytuł:: Total efficiency of adjustable compression ratio SI engine
Autorzy:: Sendyka, B.
Kula, K.
Kudzia, S.
Soczowka, J.
Powiązania:: https://bibliotekanauki.pl/articles/242772.pdf
Data publikacji:: 2007
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: SI engine
compression ratio
combustion engines
total efficiency
Opis:: The following paper includes adjustable ratio spark ignition engine's total efficiency analysis. Main modification of the engine is mounting of crankshaft on eccentric mechanism. Paper presents schemes of eccentric mechanism implemented in developed engine as well as adjustable compression ratio control system's block diagram. Propulsion from stepper motor is transmitted through self-locking worm gear. Value of compression ratio varies from 9.5 to 14. The main input signal for electronic control system is coming from knock-sensor mounted on the engine. If control system doesn't receive that signal it levels up compression ratio. As soon as signal appears ratio mentioned above is reduced by a value 0.05. During the investigation rotational speed of the engine was limited to nterval 1800-4000 [rpm] and throttle was partially closed. Relative increase of Suzuki engine's total efficiency presented in this paper surpasses 30 per cent. The outcome of investigation presents engine with variable compression ratio as a good prospect for the future. Constant adjustment of compression ratio with use of electronical control system allows significant improvement of total efficiency and consequently reducing fuel consumption.
Źródło:: Journal of KONES; 2007, 14, 4; 401-407
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 6.

Tytuł:: Opportunities of exhaust heat recovery and conversion to electricity
Autorzy:: Cienciała, M.
Kaźmierczak, A.
Krakowian, K.
Błasiński, T.
Powiązania:: https://bibliotekanauki.pl/articles/247492.pdf
Data publikacji:: 2013
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: combustion engine
heat recovery
simulation
efficiency
environmental protection
Opis:: The maximum efficiency of the conventional spark ignition engine is 33%, in the case of diesel engines is 42%. The conclusion is that the energy contained in the fuel and "released" in the combustion process is converted into mechanical work only in a small degree. The rest of the energy is unfortunately lost by heat, friction, or used to drive the engine accessories. It should also be noted that these values are peak efficiency, which is achieved only when the engine works in optimal parameters. At most used parameters engines reach efficiency on the level of 10% to 25%. In modern cars with a hybrid powertrain are solutions that can improve the efficiency of conventional internal combustion engines. It is worth to notice that there are few ways to improve the efficiency of a reciprocating engine. The main technological trends on which research is underway are knock ignition and heat recovery from the exhaust. More development seems to be the second solution, because it can be used to design new engines such as the replacement of the alternator on the generator of electricity from exhaust heat. Besides, it will be possible to adapt these systems to in-use units, which improve the energy balance of riding vehicles. In article, you will find information of literature analysis for exhaust heat recovery and conversion to electricity solutions, computerized exhaust modification with flow calculations, real modification, test bench creation, researches and scores, analysis.
Źródło:: Journal of KONES; 2013, 20, 4; 63-70
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 7.

Tytuł:: Effective compression ratio of combustion engine as a way of increasing efficiency
Autorzy:: Drabik, D.
Mamala, J.
Powiązania:: https://bibliotekanauki.pl/articles/245128.pdf
Data publikacji:: 2016
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: engine
internal combustion engine
efficiency
air pollution
compression ratio
Opis:: The article describes the processes that take place in an engine. The main terms connected with the compression ratio are explained. Moreover, the relationship between the compression ratio and the engine efficiency is discussed. This paper is a repetition of issues connected with functioning of the engine. In this article, variables that influence the chart are described, along with some examples of the way to increase engine efficiency. This article focuses on selected methods of improving efficiency of internal combustion engines. In order to fully understand processes taking place in the combustion chamber, it is necessary to create theoretical charts of thermal cycles and, then, to compare them with actual charts obtained as a result of measurements. The structure of contemporary engines is influenced by various factors, for example preservation of natural environment or limited fuel resources. These factors are crucial for mechanical engineering and engine design. Therefore, energy consumption and environmental impact of engines are taken into consideration when researching new ways and methods of enhancing engine efficiency. One of the main aims of the researchers and engineers is to reduce the emission of carbon dioxide (CO2), carbon monoxide (CO), hydrocarbons (HC) and oxides of nitrogen (NOx) in exhaust fumes. Improved engine efficiency, lowered fuel consumption and reduced emission of toxic substances are the main advantages of internal combustion engines characterized by variable compression ratio.
Źródło:: Journal of KONES; 2016, 23, 3; 93-99
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 8.

Tytuł:: Experimental investigations of various modes of charging on HCCI engine
Autorzy:: Prasad, A. Renuka
Bhandari, Rakesh
Jagadish, Donepudi
Powiązania:: https://bibliotekanauki.pl/articles/245191.pdf
Data publikacji:: 2019
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: HCCI technology
homogeneous mixture
thermal efficiency
combustion rate
emissions
Opis:: Homogeneous Charged Compression Ignition technology is most favourable or suitable for Internal Combustion engines for reducing the exhaust emissions and enhances the Thermal efficiency, improve the fuel consumption, and increase the rate of combustion. This article represents the various charging methods on HCCI technology engine; it improves the engine performance and determines the emission characteristics of HCCI technology engine. The homogeneous mixture prepared with different methods. In –cylinder internal homogeneous mixture preparation method applied in this present work. It reduces the exhaust emissions released from the combustion chamber. However, oxides of nitrogen and soot emissions are significantly reduce, because combustion starts at lower temperatures and various points in combustion chamber. The HCCI technology generates small amount of exhaust emissions and it improves the performance of the engine. In addition, performance and released emissions depends on the quality and quantity of homogeneous mixture.
Źródło:: Journal of KONES; 2019, 26, 1; 119-126
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 9.

Tytuł:: Design and development of smokeless stove for a sustainable growth
Autorzy:: Nayak, Ramesh Chandra
Roul, Manmatha K.
Roul, Prateek Debadarsi
Powiązania:: https://bibliotekanauki.pl/articles/2091365.pdf
Data publikacji:: 2022
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: combustion
efficiency
calorific value
air pollution
stove
fuel
superheater
Opis:: Air pollution has a serious impact on the health of human beings and is a major cause of death worldwide every year. Out of the many sources of air pollution, the smoke generated from household combustion devices is very dangerous due to the incomplete combustion of fuel. Women from rural areas suffer a lot due to this harmful smoke. Diseases like cancer, throat, and lung infection occur in adults and children due to inhalation of this smoke. The traditional chulha used by rural women is operated by using cow dung, straw, and wood, and the air is blown manually by using small metallic pipes. This paper presents the design and development of an innovative stove to maximize flame temperature and minimize air pollution to overcome the health-related issues of rural women. A smokeless stove is presented, in which wood, straw, and cow dung are taken as primary fuel, and superheated steam as a secondary oxidizer for its operation. In this stove, a forced draft is created by the provision of a small fan, which is operated by solar power thus eliminating the need of creating a forced draft manually by the cook which makes this innovative stove superior to the traditional chulha. Owing to the provision of superheated steam, the flame temperature as well as the burning efficiency increases. The cooking time is reduced due to higher flame temperature as compared to the liquefied petroleum gas stove. The main objective of this work is to minimize air pollution and provide a smoke-free environment to the people using such devices as this innovative stove offers complete combustion of fuel. The flame temperature of the designed stove ranges from 595°C to 700°C and its thermal efficiency is 10–17% higher than that of the traditional chulha. The design of this stove is unique, and its maintenance cost is also much less.
Źródło:: Archives of Thermodynamics; 2022, 43, 1; 109--125
1231-0956
2083-6023
Pojawia się w:: Archives of Thermodynamics
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 10.

Tytuł:: Determination of thermal efficiency of the spark ignition systems
Autorzy:: Sendyka, B.
Mitianiec, W.
Noga, M.
Wachulec, W.
Powiązania:: https://bibliotekanauki.pl/articles/246099.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: combustion process
ignition system
thermal efficiency
spark plug
CNG
Opis:: The paper presents results of measurements performed to determine thermal efficiency of spark ignition systems. Because of small pressure change after sparking process smali volume chamber has been proposed for measurements. A direct measurement method of pressure increment determination has been chosen. In this method one pressure chamber is used. The caloric chamber isfilledwith nitrogen, which is a neutral gas. It is preferable medium than air because it is one-component gas and it has a precisely-known value of a specific gas constant. The value of speciflc gas constant is reąuested to calculate a value of discharge energy given to the gas. In the chosen method pressure increment in the chamber during spark discharge is measured. The pressure increment in the chamber during ignition is strictly related to the energy of spark discharge. The energy balance calculations determined values of heat los s es for two types of electrodes (normal and "thin") anddifferent initial pressure (p=0 bar and p=25 bar). The maximal value of the thermal efficiency was observedfor the higher value of pressure in chamber and thin electrodes of spark ping. It was also stated, that the higher thermal efficiency for" thin " spark ping electrodes is a result of reduced heat transfer. The paper presents results of the tests carried out in the caloric chamber of 4. l cm3 filled with nitrogen at ambient temperature using PCB transducer direct measurement method. Results of the measurements done using differential pressure transducer for the same parameters like in thefirst measurement method were similar.
Źródło:: Journal of KONES; 2010, 17, 1; 365-371
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 11.

Tytuł:: Method for ecological combustion of organic waste in commercial low power boiler
Metoda ekologicznego spalania odpadów organicznych w komercyjnym kotle małej mocy
Autorzy:: Swat, M.
Powiązania:: https://bibliotekanauki.pl/articles/258388.pdf
Data publikacji:: 2015
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Technologii Eksploatacji - Państwowy Instytut Badawczy
Tematy:: biomass
biomass combustion
energetic efficiency
ecological efficiency
biomasa
spalanie biomasy
sprawność energetyczna
sprawność ekologiczna
Opis:: The structure of primary energy in Poland still is formed by a high position of coal from domestic resources. The widespread use of this fuel encourages and facilitates „co-combustion of biomass with coal” in power boilers. Differences in the structure and behaviour during the preparation and combustion of coal and vegetable fuel are the cause of the difficulties with co-combustion of raw biomass in power boilers. Based on research, the effect of biomass characteristics on the basic parameters of the process of combustion and co-combustion of coal in a low-power boiler device was determined. Changes in excess air-ratios and exhaust gas temperatures, and changes in the concentrations of toxic components of exhaust gases during the combustion process were determined. The amount of heat generated in the boiler during the combustion of biomass and fuel blends of biomass and coal was determined. Controlled changes in process parameters of combustion conditions (co-combustion) of coal and selected types of biomass allow for environmentally friendly combustion in commercial low-power boilers.
Strukturę energii pierwotnej w Polsce wciąż kształtuje wysoka pozycja węgla z zasobów krajowych. Powszechne stosowanie tego paliwa sprzyja i ułatwia tzw. współspalanie biomasy z węglem w kotłach energetycznych. Różnice w budowie i zachowaniu podczas przygotowania oraz spalania węgla i paliwa roślinnego są przyczyną pojawiających się trudności eksploatacyjnych przy współspalaniu surowej biomasy w kotłach energetycznych. Na podstawie przeprowadzonych badań określono wpływ właściwości biomasy na przebieg podstawowych parametrów procesu jej spalania i współspalania z węglem kamiennym w urządzeniu kotłowym małej mocy. Określono zmiany współczynnika nadmiaru powietrza, zmiany temperatur gazów spalinowych, zmiany stężeń toksycznych składników spalin w trakcie procesów spalania. Ustalono ilości energii cieplnej wytworzonej w instalacji kotłowej w trakcie spalania biomasy i mieszanin paliwowych biomasy z węglem kamiennym. Kontrolowane zmiany parametrów procesowych warunków spalania (współspalania) węgla i wybranych rodzajów biomasy pozwalają na ekologiczne prowadzenie procesów spalania w komercyjnych kotłach małej mocy.
Źródło:: Problemy Eksploatacji; 2015, 2; 121-134
1232-9312
Pojawia się w:: Problemy Eksploatacji
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 12.

Tytuł:: Model and experimental research of the pressure cooling system for the internal combustion engine
Autorzy:: Krakowski, R.
Powiązania:: https://bibliotekanauki.pl/articles/244930.pdf
Data publikacji:: 2014
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: combustion engines
cooling system
energy balance
engine efficiency
environmental protection
Opis:: In this paper, the existing methods to reduce the heat discharged by the engine were characterized and the efficiency of combustion piston engine was analysed, where it was shown the need and the potential for reducing the heat dissipated directly or indirectly to the surrounding atmosphere. The model of the engine cooling system for high coolant temperature developed through AMESim software was presented in this paper. The model of the cooling system was made based on test stand solution designed and built using original components and units diesel engine 4CT90. The simulation researches results of temperature course and pressure course were shown. In this paper was demonstrated that it is possible to maintain the assumed constant pressure of 0.3 MPa in the system and obtain it at the elevated liquid temperature leading to an increase in overall engine efficiency. These researches were carried out also on the experimental model stand, which confirmed the results obtained in simulation researches. Then 4CT90 engine test stand was described, where speed characteristics as a function of torque, power and specific fuel consumption and load characteristics as a function of the fractions of hydrocarbons, carbon monoxide and carbon dioxide, as well as specific and hourly fuel consumption were performed. Comparison of parameters and efficiency assessment of engine interacts with a traditional and pressure cooling system. The efficiency of the engine with the pressure and a traditional cooling system was evaluated.
Źródło:: Journal of KONES; 2014, 21, 4; 289-296
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 13.

Tytuł:: Research and development of a high-performance oxy-fuel combustion power cycle with coal gasification
Autorzy:: Kindra, Vladimir
Rogalev, Andrey
Zlyvko, Olga
Sokolov, Vladimir
Milukov, Igor
Powiązania:: https://bibliotekanauki.pl/articles/1955073.pdf
Data publikacji:: 2021
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: carbon dioxide
Oxy-fuel combustion
Gasification
energy efficiency
thermodynamic analysis
Opis:: Recent climate changes stimulate the search and introduction of solutions for the reduction of the anthropogenic effect upon the environment. Transition to the oxy-fuel combustion power cycles is an advanced method of CO2 emission reduction. In these energy units, the main fuel is natural gas but the cycles may also work on syngas produced by the solid fuel gasification process. This paper discloses a new highly efficient oxy-fuel combustion power cycle with coal gasification, which utilizes the syngas heat in two additional nitrogen gas turbine units. The cycle mathematics simulation and optimization result with the energy unit net efficiency of 40.43%. Parametric studies of the cycle show influence of the parameters upon the energy unit net efficiency. Change of the cycle fuel from natural gas to coal is followed by a nearly twice increase of the carbon dioxide emission from 4.63 to 9.92 gmCO2/kWh.
Źródło:: Archives of Thermodynamics; 2021, 42, 4; 155-168
1231-0956
2083-6023
Pojawia się w:: Archives of Thermodynamics
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 14.

Tytuł:: Cogeneration systems
Autorzy:: Urbonienė, Virginija
Powiązania:: https://bibliotekanauki.pl/chapters/4173390.pdf
Data publikacji:: 2019
Wydawca:: Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:: steam turbines
electrical efficiency
gas turbines
microturbines
internal combustion engine
Opis:: Cogeneration can be defined as the general production of thermodynamic heat and electricity from a single initial source of energy. The device, in which the process of cogeneration occurs, is called cogeneration device. Cogeneration changes separated electric energy and heat production. The separation of electric energy and heat production is characterized by substantial energy losses of initial fuel. In the separated power generation, the user receives the electric energy, which is produced by the large-scale power plants and heat is produced in high-efficiency boilers. In this case losses make about 40% in produced heat and 60% – produced electric energy.
Źródło:: Buildings 2020+. Energy sources; 213-254
9788365596727
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 15.

Tytuł:: The description of the total efficiency of 2SZ-FE engine with the variable valve timing
Autorzy:: Sendyka, B.
Sochan, A.
Noga, M.
Rodak, Ł.
Powiązania:: https://bibliotekanauki.pl/articles/243046.pdf
Data publikacji:: 2007
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: silnik spalinowy
obieg Atkinsona
spalanie
sprawność ogólna
silnik
combustion engine
Atkinson cycle
combustion
total efficiency
engine
Opis:: In this paper there were conducted tests of the combustion engine with the Atkinson cycle and with applying variable valve timing. There was described the 2SZ-FE engine characteristics and assigned the total efficiency before and after application of the phase shifter. Secondly, there was determined the thermal efficiency of the single engine work cycles and also engine 's total efficiency by using the optoelectronic pressure sensor and mathematical programme. After that, it was available to present the range of the variable valve timing. Atkinson system, phases of 2SZ-FE engine timing gear, the total efficiency distribution during 75 % of throttle opening and when inlet valves are open, the total efficiency increase during 75 % of throttle opening, the total efficiency distribution during 50 % of throttle opening and when suction valves are open, the total efficiency increase during 50 % of throttle opening, the total efficiency distribution during 25 % of throttle opening and when inlet valves are opened, the total efficiency increase during 25 % of throttle opening, the total efficiency distribution with application of phases shifter are presented in the paper.
Źródło:: Journal of KONES; 2007, 14, 2; 401-407
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 16.

Tytuł:: Simple tank-to-wheels analysis tool for future vehicle powertrains
Autorzy:: Vavra, J.
Macek, J.
Takats, M.
Cerovsky, Z.
Powiązania:: https://bibliotekanauki.pl/articles/243520.pdf
Data publikacji:: 2008
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: vehicle powertrain efficiency
internal combustion engine
fuel cells
simulation
driving cycle
Opis:: The future powertrains have to be properly assessed in early stages of vehicle design using simple and fast but reliable tools. The aim of the paper is to develop a simulation tool suitable for any of current transient cycles for finding of upper limits of tank-to-wheel efficiencies of recent or future vehicle powertrains in different concepts of vehicles to assess their potential, to find gaps between the state-of-the-art and to find ways to bridge them. The simulation philosophy and procedure may be described in the following steps. The testing cycle power demands on vehicle movement are analyzed and the optimum operation efficiency of a primary mover (engine, fuel cell, electric motor) is assigned to them. Dynamic torques at powertrain are accounted for. Speed, speed slip (driving machine/wheels) and load dependencies of transmission efficiency are simulated by simple models. In the case of a hybrid solution, charging and discharging efficiencies of energy accumulators and additional losses (e.g., in converters and inverters) are considered. The clear modular structure of the simulation tool enables the researcher to amend new features of powertrain components. The links to more detailed simulation tools are prepared. The simulation tool is described by regression and algebraic models (based on the results of higher level simulation tools) in a way giving immediate response during sensitivity analysis. The examples of tool calibration for different powertrains and results comparing powertrain potential are presented for lower medium class passenger car. The current simulation tool creates a useful link between detailed and accurate but CPU time demanding 1-D tools, based on partial differential equations, and rules-of-thumb, used sometimes for initial potential assessments. Moreover, the described tool does not require detailed data on the powertrain during early stage of design but it shows its potential for further development.
Źródło:: Journal of KONES; 2008, 15, 3; 525-534
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 17.

Tytuł:: The experimental assessment of air supply system modification on inlet air filtration efficiency and military vehicle engine effectiveness improvement
Autorzy:: Dziubak, T.
Trawiński, G.
Powiązania:: https://bibliotekanauki.pl/articles/243953.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: combustion engines
air filters
filtration efficiency
flow drag
filter absorbency
effective parameters of the engine
mechanical efficiency
Opis:: Specific features of air inlet system of BWP-1 vehicle UTD-20 engine are shown. The tests results of filtration efficiency and air flow drag for BWP-1 vehicle air filter standard version are presented. The necessity of UTD-20 engine air supplying system constructional changes are proved. The inlet air filtration system for BWP-1 engine with the porous filter was proposed and performed. The characteristics of the air purification efficiency (fi=f(mp) and flow drag Delta p- f(mp) Delta p= f(Omega c) for designed air filter were determined. Absorbency of filter for air nominal stream of engine BWP-1 was specified. The designed and executed partition air filter was subjected to comparative tests on an engine test bench. The influence of modernized air filter and fuel dose increase on engine effective parameters were determined. The tests covered comparison of effective parameters (determined for maximum load) of a UTD-20 engine equipped with a standard air filter (variant 1), a modernized air filter (variant 2) and additionally, for the modernized air filter, with injection pump with fuel dose increased (variant 3). There were determined the influence the proposed changes on indicated and effective torque during engine free acceleration and its mechanical efficiency as well.
Źródło:: Journal of KONES; 2010, 17, 3; 79-86
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 18.

Tytuł:: Utilizacija tepla dvigatelejj mobilnykh ehnergeticheskikh sredstv
Heat recovery for engines of agricultural machinery
Autorzy:: Havrysh, V.
Shatohin, M.
Gruban, V.
Powiązania:: https://bibliotekanauki.pl/articles/78269.pdf
Data publikacji:: 2015
Wydawca:: Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:: agricultural machine
combine-harvester
tractor
heat recovery system
combustion engine
modernization
efficiency
Źródło:: Motrol. Motoryzacja i Energetyka Rolnictwa; 2015, 17, 2
1730-8658
Pojawia się w:: Motrol. Motoryzacja i Energetyka Rolnictwa
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 19.

Tytuł:: Comparison of combustion of gasoline and methanol in the si engine dual fuelled
Autorzy:: Stelmasiak, Zdzisław
Powiązania:: https://bibliotekanauki.pl/articles/242301.pdf
Data publikacji:: 2013
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: methyl alcohol
gasoline
spark ignition engine
combustion parameters
thermal efficiency
dual fuelling
Opis:: In the paper are presented comparative tests of combustion of gasoline and combustion of methanol in spark ignition engine of the Fiat 1100 MPI type. The engine was equipped with a prototype suction manifold with duplex injectors on each cylinder. Implemented system enabled dual fuel operation of the engine with any fraction of the alcohol. Engine performance and start-up capabilities were the same like in case of the operation on gasoline only. Type and parameters of the fuel supply can be changed in any time during operation of the engine. The study dealt with comparison of a selected parameters used to assessment of combustion of the fuels: pressure of the working medium p, rate of pressure rise dp/d, heat release rate dQ/d, temperature of the working medium, and combustion angle. The investigations pointed at considerable differences in run of combustion of the gasoline and combustion of the methanol, as autonomous fuels. Moreover, addition of methanol to gasoline results in considerable differences in combustion process, comparing to combustion of gasoline mixtures. The combustion goes on more dynamically, especially during initial phase of the process, while total time of the combustion is shorter. Effects of these changes are: higher maximal pressures, faster rates of pressure growth and heat release. Extent of change of combustion parameters depends on methanol fraction in total dose of the fuel supplied to the engine. Addition of the methanol effects in growth of general efficiency of the engine, which increases together with growth of methanol fraction and engine load. Absolute growth of the efficiency amounted to 2-5%, while relative growth amounted to 6-16%. Such significant growth of the efficiency should lead to reduction of energy consumption during engine operation.
Źródło:: Journal of KONES; 2013, 20, 1; 317-328
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 20.

Tytuł:: Badania kogeneratora małej mocy
Small power cogenerator test
Autorzy:: Włas, M.
Jaworski, J.
Gackowski, M.
Kolbusz, W.
Powiązania:: https://bibliotekanauki.pl/articles/268698.pdf
Data publikacji:: 2012
Wydawca:: Politechnika Gdańska. Wydział Elektrotechniki i Automatyki
Tematy:: cogeneration
internal combustion engine
iso efficiency curves
kogeneracja
silnik benzynowy
wysoka sprawność
Opis:: W pracy przedstawiono proces projektowania i implementacji systemu sterowania źródłem energii elektrycznej i cieplnej - bazującym na kogeneracji wysokosprawnej, wykorzystującej zmodyfikowany kogenerator firmy TOTEM z dodatkowym przekształtnikiem energoelektronicznym. Jego istotną częścią jest 4-suwowy silnik benzynowy o zapłonie iskrowym, dostosowany do spalania gazu ziemnego. W celu osiągnięcia maksymalnej sprawności układu, wykorzystano sterowanie prędkością obrotową jednostki spalinowej. Opracowanie "pagórka" sprawności maszyny umożliwia poruszanie się po trajektorii zapewniającej poziom sprawności uzasadniający poniesione nakłady inwestycyjne, m.in.: zakup dwukierunkowego przekształtnika energii.
In this paper, designing and control system implementation of combined heat and power TOTEM™ system was presented. The crucial part of that is 4-stroke internal combustion engine, natural gas has been adapted. Because of the maximization of efficiency, variable speed control has been implemented. The iso-efficiency curves allow to operate on minimum operation cost trajectory, makes high installation cost worth profitable.
Źródło:: Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej; 2012, 31; 151-155
1425-5766
2353-1290
Pojawia się w:: Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 21.

Tytuł:: The effect of oxygenated diesel-n-butanol fuel blends on combustion, performance, and exhaust emissions of a turbocharged crdi diesel engine
Autorzy:: Labeckas, G.
Slavinskas, S.
Rudnicki, J.
Zadrąg, R.
Powiązania:: https://bibliotekanauki.pl/articles/259929.pdf
Data publikacji:: 2018
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: diesel engine
diesel-n-butanol blends
combustion phenomenon
performance efficiency
smoke
pollutant emissions
Opis:: The article deals with the effects made by using various n-butanol-diesel fuel blends on the combustion history, engine performance and exhaust emissions of a turbocharged four-stroke, four-cylinder, CRDI 1154HP (85 kW) diesel engine. At first, load characteristics were taken when running an engine with normal diesel fuel (DF) to have ‘baseline’ parameters at the two ranges of speed of 1800 and 2500 rpm. Four a fossil diesel (class 1) and normal butanol (n-butanol) fuel blends possessing 1 wt%, 2 wt%, 3 wt%, and 4 wt% (by mass) of n-butanol-bound oxygen fractions were prepared by pouring 4.65 wt% (BD1), 9.30 wt% (BD2), 13.95 wt% (BD3), and 18.65 wt% (BD4) n-butanol to diesel fuel. Then, load characteristics were taken when an engine with n-butanol-oxygenated fuel blends at the same speeds. Analysis of the changes occurred in the autoignition delay, combustion history, the cycle-to-cycle variation, engine efficiency, smoke, and exhaust emissions NOx, CO, THC obtained with purposely designed fuel blends was performed on comparative bases with the corresponding values measured with ‘baseline’ diesel fuel to reveal the potential developing trends.
Źródło:: Polish Maritime Research; 2018, 1; 108-120
1233-2585
Pojawia się w:: Polish Maritime Research
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 22.

Tytuł:: Energetyczna i ekologiczna ocena procesu pozyskiwania ciepła podczas spalania liści zbieranych na terenach miejskich
Energy-related and ecological evaluation of heat acquisition process during combustion of leaves picked in urban areas
Autorzy:: Dziewanowska, M.
Dobek, T.
Powiązania:: https://bibliotekanauki.pl/articles/289192.pdf
Data publikacji:: 2009
Wydawca:: Polskie Towarzystwo Inżynierii Rolniczej
Tematy:: biomasa
liście
spalanie
efektywność ekonomiczna
wartość energetyczna
biomass
leaves
combustion
economic efficiency
calorific value
Opis:: Obok wykorzystywanych rodzajów biomasy, istnieje wiele innych materiałów mogących służyć do celów energetycznych. Jednym z nich mogą być liście opadające z drzew. Niestosowaną dotąd metodą zagospodarowania liści jest ich spalanie. Celem głównym publikacji było opracowanie i ocena technologii zbioru i przetwarzania liści drzew zbieranych na terenach miejskich. Ocena przeprowadzona była w aspekcie ekonomicznym, energetycznym i ekologicznym. Na podstawie przeprowadzonych badań można stwierdzić, że metoda zagospodarowania liści zbieranych na terenach miejskich poprzez spalanie, może być uzupełnieniem do stosowanych aktualnie metod tzn. składowania i kompostowania. Liście drzew liściastych ze względu na wartość opałową mogą być źródłem energii cieplnej pozyskiwanej z biomasy.
Besides individual biomass types being used, there are many other materials which may be used for energy production purposes. Leaves falling from trees could be one of them. Combustion of these leaves is one of processing methods which haven't been used yet. The main purpose of this publication was to develop and evaluate picking and processing technology for tree leaves picked in urban areas. The evaluation was carried out in economic, energy-related and ecological aspect. Completed research allows to state that the method of processing leaves picked in urban areas by combustion could complement currently used methods, that is storage and composting. Due to their calorific value, leaves of deciduous trees may be the source of thermal energy acquired from biomass.
Źródło:: Inżynieria Rolnicza; 2009, R. 13, nr 1, 1; 115-122
1429-7264
Pojawia się w:: Inżynieria Rolnicza
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 23.

Tytuł:: Influence of moisture content of combusted wood on the thermal efficiency of a boiler
Autorzy:: Dzurenda, L.
Banski, A.
Powiązania:: https://bibliotekanauki.pl/articles/239999.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: boiler
wood
combustion
thermal efficiency
mathematical dependence
bojler
drewno
spalanie
wydajność termiczna
matematyczna zależność
Opis:: In the paper the influence of moisture content of wood on the heat losses and thermal efficiency of a boiler is analysed. The moisture content of wood has a negative effect, especially on flue gas loss. The mathematical dependence of the thermal efficiency of a boiler is presented for the following boundary conditions: the moisture content of wood 10–60%, range of temperatures of emitted flue gases from the boiler into the atmosphere 120–200 C, the emissions meeting the emission standards: carbon monoxide 250 mgm^-3, fly ash 50 mgm^-3 and the heat power range 30–100%.
Źródło:: Archives of Thermodynamics; 2017, 38, 1; 63-74
1231-0956
2083-6023
Pojawia się w:: Archives of Thermodynamics
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 24.

Tytuł:: The energy efficiency and ecological benefits of low-power furnaces powered by secondary biofuel
Efektywność energetyczna i ekologiczna kotła małej mocy zasilanego biokomponentowym paliwem wtórnym
Autorzy:: Swat, M.
Powiązania:: https://bibliotekanauki.pl/articles/256815.pdf
Data publikacji:: 2016
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Technologii Eksploatacji - Państwowy Instytut Badawczy
Tematy:: combustion
liquid fuel furnace
alternative fuel
FAME
power efficiency
ecological efficiency
spalanie
kocioł na paliwo płynne
paliwo alternatywne
sprawność energetyczna
sprawność ekologiczna
Opis:: The application of FAME obtained from was te vegetable oil has become a very attractive fuel, because, apart from being an energy carrier, it is also a solution for burdensome waste. Based on conducted research, the author presents the influence of FAME on the basie operational parameters of a low-power furnace. The following parameters were analysed: the air excess factor, the temperature of exhaust gases, and the concentration of toxic compounds in exhausts during the combustion process. The thermal energy was measured both for FAME and for its mixtures with heating oil. The appropriately applied combustion conditions as well as suitable composition of the fuel provide an ecological and effective supply for commercial low-power furnaces.
Zastosowanie FAME pochodzącej z odpadowych olejów roślinnych jako paliwa nabiera coraz większego znaczenia, ponieważ oprócz tego, że może być źródłem energii - rozwiązuje również problem utylizacji uciążliwych dla środowiska odpadów. Na podstawie przeprowadzonych badań określono wpływ FAME na przebieg podstawowych parametrów procesu spalania w urządzeniu kotłowym małej mocy. Określono zmiany współczynnika nadmiaru powietrza, zmiany temperatur gazów spalinowych, zmiany stężeń toksycznych składników spalin w trakcie procesów spalania. Ustalono ilości energii cieplnej wytworzonej w instalacji kotłowej w trakcie spalania FAME i jego mieszanin paliwowych z olejem opałowym. Kontrolowane zmiany parametrów procesowych warunków spalania FAME i wybranych mieszanin z olejem opałowym pozwalają na ekologiczne prowadzenie procesów spalania w komercyjnych kotłach małej mocy.
Źródło:: Problemy Eksploatacji; 2016, 4; 127-139
1232-9312
Pojawia się w:: Problemy Eksploatacji
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 25.

Tytuł:: The efficiency analysis of an asynchronous generator supplying single-phase receiver sets in an agricultural farm
Analiza efektywnosci generatora asynchronicznego zasilajacego odbiorniki jednofazowe w gospodarstwie rolnym
Autorzy:: Makarski, P.
Scibisz, M.
Powiązania:: https://bibliotekanauki.pl/articles/792405.pdf
Data publikacji:: 2011
Wydawca:: Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:: asynchronous generator
generator efficiency
single-phase receiver
agricultural farm
electrical energy
combustion engine
energy network
Źródło:: Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2011, 11
1641-7739
Pojawia się w:: Teka Komisji Motoryzacji i Energetyki Rolnictwa
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Informacja

Wyszukujesz frazę "combustion efficiency" wg kryterium: Temat

Źródło danych

Dostawca treści

Kolekcja

Rok wydania

Wydawca

Temat

Autor

Typ dokumentu

Język