Temat: cooling - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Influence of speed and load on the engine temperature at an elevated temperature cooling fluid
Autorzy:: Krakowski, R.
Powiązania:: https://bibliotekanauki.pl/articles/243666.pdf
Data publikacji:: 2013
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: combustion engines
cooling system
coolant temperature
Opis:: In this article has been found that the most popular and widely used method of cooling is liquid cooling, which ensures uniformity of temperature around the combustion chamber and easy acquisition and transfer of heat, although the properties of water are limited by maximum temperature of the coolant. Preliminary scientific research of such a system indicates the possibility of increasing overall efficiency and reducing toxic components in exhaust gases at low engine loads when the engine exhaust temperature of the classic system is too low for efficient catalytic action. This paper presents the dynamometer test stand designed and built using original components of diesel engine 4CT90 production of WSW "ANDORIA" SA. Presented system was designed for the four cylinder with indirect fuel injection system. Research was made on the engine dynamometer stand, which was equipped with standard measure devices (measures: speed, torque, temperatures, flows) and exhaust gas analysers. The temperature of this liquid was increased to the higher level than temperature of boiling water in normal conditions. Overpressure inside the cooling system was limited to 0.3 MPa, the temperature inside the cooling system was increased to 115–120°C. During the test, the cooling system was filled with coolant at 90%. The selected results of investigations of the cooling system for the combustion engine working with higher temperature of the cooling liquid, where the influence of speed and load on the engine temperature were presented.
Źródło:: Journal of KONES; 2013, 20, 4; 185-192
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Badanie właściwości płynów chłodzących do układu chłodzenia o podwyższonej temperaturze
Investigation of properties of cooling liquids used in cooling system of increased temperature
Autorzy:: Krakowski, R.
Walentynowicz, J.
Powiązania:: https://bibliotekanauki.pl/articles/222069.pdf
Data publikacji:: 2012
Wydawca:: Akademia Marynarki Wojennej. Wydział Dowodzenia i Operacji Morskich
Tematy:: silniki spalinowe
chłodzenie silników
ciecze chłodzące
badania eksperymentalne
internal combustion engines
cooling system
cooling liquids
experimental research
Opis:: W artykule przedstawiono wyniki badań trzech cieczy chłodzących stosowanych w ciśnieniowym układzie chłodzenia. W badaniach użyto wodę oraz jej 25% i 50% mieszaniny z glikolem propylenowym i etylenowym. Oceniono wpływ zastosowanej cieczy o podwyższonej temperaturze na intensywność odprowadzania ciepła z układu chłodzenia.
The paper presents the results of an investigation of three cooling liquids used in the pressure a cooling system. To conduct the investigation water and 25% and 50% of water mixture with propylene glycol and ethylene glycol was used. It assesses the effect of the high temperature liquid used on the intensity of carrying away the heat from the cooling system was assessed.
Źródło:: Zeszyty Naukowe Akademii Marynarki Wojennej; 2012, R. 53 nr 1 (188), 1 (188); 107-113
0860-889X
Pojawia się w:: Zeszyty Naukowe Akademii Marynarki Wojennej
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Simulation researches of influence of compensation tank yolume on control parameters of cooling liquid temperature in the piston combustion engine
Autorzy:: Krakowski, R.
Walentynowicz, J.
Powiązania:: https://bibliotekanauki.pl/articles/244033.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: combustion engines
cooling systems
mathematical modelling
computer simulation
Opis:: Mathematical model for simulation of operation of the cooling system for the combustion engine with the equalizing tank was described in this paper. Results of digital simulation of influence of the air volume changes in equalizing reservoir on the control parameters of liquid temperature in the cooling system were presented Simulation model was worked out in AmeSim computation system. It was put that the temperature of the cooling liquid should be raisedup to 125-130°C and the liquid pressure inside cooling system will be the main control parameter for pressure limited up to 0.3 MPa. Acceptable value of the pressure was provided by changing of liquid cooling intensity realized by switching two ventilators. The simulated courses of pressure, temperature, streams ofheat bringing to the cooling system, efficiency of the liquid coolingpump as well frequency of turning the ventilator were presented in this paper. It was also shown, that is possible to achieve the acceptable pressure level up to 0.3 MPa with interval plus or minus 0.005 MPa and obtain higher temperature of the liquid up to assumed value. It was shown that increasing air volume in the equalizing tank resulted decreasing freąuency of fun turning. The optimum capacity of the equalizing reservoir was determined.
Źródło:: Journal of KONES; 2010, 17, 3; 223-230
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Internal combustion engine cooling system with elevated coolant temperature research on the model test stand
Autorzy:: Krakowski, R.
Powiązania:: https://bibliotekanauki.pl/articles/242843.pdf
Data publikacji:: 2013
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: combustion engines
engine cooling
test stand
coolant temperature
Opis:: In the paper a model test stand designed and built using original components of diesel engine 4CT90 is presented. The stand provides working conditions as close as possible to the exploitation conditions of the engine cooling system. This applies both to the intensity of heat inside the cylinders of the engine, the temperature uniformity along the cylinder axis, as well as variable-speed water pump. Research carried out on the model stand were aimed at checking the operation of the cooling intensity control with varying levels of filling of the cooling system and develop a control method of the cooling system before testing on the dynamometer stand. In addition, system operation at elevated cooling liquid pressure for the possibility of obtaining the elevated coolant temperature were checked. The influence of working conditions on the level of the temperature was also analysed. In this paper, the characteristics selected for two values of pressure, for 0.15 MPa and 0.2 MPa, and for two different values of the degree of filling of the cooling liquid were presented. During the warming-up and continuous heating of the cylinder and the cylinder head by electrical heaters, temperature and overpressure courses before and after the liquid radiator, temperature before the inlet and outlet of the liquid from the engine and the temperature at selected points inside the engine water jacket are designated. The results of measurements of the coolant pump flow at different speed water pump were also presented in this paper.
Źródło:: Journal of KONES; 2013, 20, 4; 177-183
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Diagnosis modern systems of marine diesel engine
Autorzy:: Krakowski, R.
Powiązania:: https://bibliotekanauki.pl/articles/243668.pdf
Data publikacji:: 2014
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: technical diagnostics
diagnostic methods
piston engines
cooling systems
Opis:: In this paper, in terms of diagnostic tests, functional systems composed of a technical object that is marine diesel engine piston were presented. This decomposition enables the identification of diagnostic systems, where failures occur most frequently and those whose failure may cause serious This decomposition enables the identification of diagnostic systems, where failures occur most frequently and those whose failure may cause serious consequences further consequences. Marine diesel engine was divided into the following functional systems: piston-crank exchange of the working medium, fuel supply, lubrication, cooling, starting, starting and reversing. Operating practice shows that the most common marine engine failure include damage to the injection system, the injectors, injection pumps, fuel system, speed controllers, lubrication system, timing mechanism, as well as the cooling system malfunctions. In this paper, examples of currently used diagnostic systems were described. In addition, the unconventional methods of diagnosing piston engines were presented. These are new, increasingly completely without disassembly and without any interference in the process of the internal combustion engine technical condition testing methods. Measurement systems computerization causes they are used with the simultaneous use of artificial intelligence and especially expert systems. These include, inter alia, vibration analysis, marine engine exhaust gas analysis, acoustic emission, endoscopy and quick photography in research diagnostics. Then infirmities cooling system were presented. The problem of development of methods of diagnosis and diagnostic system for marine diesel engine cooling system was formulated. It has been found that the developed diagnostic system would be a good complement to the existing electronic surveillance systems of the marine engine technical state.
Źródło:: Journal of KONES; 2014, 21, 3; 191-198
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Effect of elevated coolant temperature on the exhaust composition of piston internal - combustion engine
Autorzy:: Krakowski, R.
Powiązania:: https://bibliotekanauki.pl/articles/246871.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: combustion engines
engine cooling
exhaust emissions
air pollution
environmental protection
Opis:: There is a tendency to increase the economic efficiency of engine operation and energy efficiency and reduce emissions of toxic combustion products. One way to reduce emissions of toxic components in exhaust gases is raising the coolant boiling point, which requires the simultaneous increase in pressure in the cooling system. Previous studies suggest that such a system can reduce the amount of toxic components in exhaust gases, particularly at low engine load when the engine exhaust temperature is too low to make effective catalytic action. The paper presents the model and experimental test stands to research the cooling system at an elevated temperature of the coolant. The speed and load characteristics of the standard cooling systems and pressure were presented. The research results were designed to determine the effect of elevated temperature in the cooling system on the composition of the gases. The characteristics of the external speed and load were performed with standard cooling systems and pressure. When performing velocity characteristics of the engine was loaded up in the whole range of engine speed from 1000 to 4000 rev/min, while the load characteristics were performed for different values of torque at constant speed in the range from 1500-4000 rpm. The results confirmed the benefits of increasing the temperature of the coolant. The presented characteristics that apply pressure cooling system reduces the amount of toxic components in exhaust gases, particularly at low engine load, in which the engine operates most often in urban conditions.
Źródło:: Journal of KONES; 2012, 19, 2; 263-270
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

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

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Skocz do pozycji: 8.

Tytuł:: Application of the cooling system with elevated temperature of coolant for the internal combustion engine
Zastosowanie układu chłodzenia o podwyższonej temperaturze płynu chłodzącego w tłokowym silniku spalinowym
Autorzy:: Krakowski, R.
Powiązania:: https://bibliotekanauki.pl/articles/133107.pdf
Data publikacji:: 2013
Wydawca:: Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:: combustion engines
cooling system
energy balance
engine efficiency
silniki spalinowe
układ chłodzenia
bilans energii
sprawność ogólna
Opis:: The paper presents an analysis of the heat balance combustion engine, which was shown that it is possible to increase its efficiency by reducing cooling losses, such as raising the temperature of the coolant. The presented research results show that it was possible to maintain the pressure in the system, and thus the temperature of the liquid on the assumed level for a longer period by changing the intensity of cooling. The increase of coolant temperature to 120°C had an effect an increase of economy of operation and an increase in the maximum engine torque and reduced the share of carbon monoxide and hydrocarbons at low load and low engine speed of its, and therefore outside the scope of the catalytic converter. Increased share of nitrogen oxides, which requires the use of additional and effectively reducing the nitrogen oxides.
W referacie przedstawiono analizę bilansu cieplnego tłokowego silnika spalinowego, w której wykazano, że istnieje możliwość zwiększenia jego sprawności poprzez zmniejszenie strat chłodzenia, np. podwyższając temperaturę płynu chłodzącego. Przedstawiono wyniki badań, z których wynika, że możliwe było utrzymanie nadciśnienia w układzie, a tym samym temperatury cieczy o założonej wartości przez dłuższy okres zmieniając intensywność chłodzenia. Podwyższenie temperatury cieczy chłodzącej do 120°C wpłynęło na zwiększenie sprawności silnika oraz wzrost maksymalnego momentu obrotowego silnika oraz spowodowało zmniejszenie udziałów tlenku węgla i węglowodorów w spalinach podczas pracy z małym obciążeniem i małą prędkością obrotową. Zwiększyły się udziały tlenków azotu, co wymaga zastosowania dodatkowego i efektywnego układu redukującego tlenki azotu.
Źródło:: Combustion Engines; 2013, 52, 3; 686-690
2300-9896
2658-1442
Pojawia się w:: Combustion Engines
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Effect of elevated coolant temperature on the useful parameters of piston internal-combustion engine
Wpływ podwyższonej temperatury płynu chłodzącego na parametry użyteczne silnika
Autorzy:: Krakowski, R.
Powiązania:: https://bibliotekanauki.pl/articles/360529.pdf
Data publikacji:: 2011
Wydawca:: Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:: silniki spalinowe
chłodzenie silników
badania eksperymentalne
charakterystyki silnika
internal combustion engines
cooling system
efficiency
experimental research
engine characteristics
Opis:: The paper presents the characteristics to determine the effect of elevated temperature coolant in the cooling system on engine useful parameters, the torque, power, specific fuel consumption and efficiency as a function of the effective engine speed and specific fuel consumption, hourly fuel consumption and air consumption as a function of engine load. The most popular and widely used method of cooling is liquid cooling, which ensures uniformity of temperature around the combustion chamber and easy acquisition and transfer of heat, although the properties of water are limited to a maximum temperature of the coolant. Increase the efficiency of modern internal combustion piston engines is done by modern control systems units of each engine according to its operating conditions, reducing heat loss in engine cooling and recovering energy from exhaust gases (e.g.: turbine air compressors). The results of tests confirmed the benefits of increased coolant temperature. The set of characteristics that applies the pressure of the cooling system affect the fuel consumption, especially at high speed, which contributes to increase effective efficiency of the engine.
W artykule przedstawiono charakterystyki mające na celu określenie wpływu podwyższonej temperatury płynu chłodzącego w układzie chłodzenia na parametry użyteczne silnika, czyli moment obrotowy, moc, jednostkowe zużycie paliwa i sprawność efektywną w funkcji prędkości obrotowej silnika, a także jednostkowe i godzinowe zużycie paliwa oraz godzinowe zużycie powietrza w funkcji obciążenia silnika. Najpopularniejszym i masowo stosowanym sposobem chłodzenia jest chłodzenie cieczowe, które zapewnia równomierność temperatury wokół komory spalania oraz łatwość przejmowania i przenoszenia ciepła, aczkolwiek właściwościami wody ograniczona jest maksymalna temperatura chłodziwa. Wzrost sprawności współczesnych tłokowych silników spalinowych odbywa się poprzez nowoczesne systemy sterowania poszczególnymi zespołami silnika odpowiednio do warunków pracy silnika, zmniejszenie strat energii cieplnej na chłodzenie silnika oraz odzyskiwanie energii ze spalinami (np. turbiny sprężarek powietrza). Wyniki badań potwierdziły korzyści wynikające ze zwiększenia temperatury cieczy chłodzącej. Z przedstawionych charakterystyk wynika, że zastosowanie ciśnieniowego układu chłodzenia wpływa na mniejsze zużycie paliwa, szczególnie przy dużej prędkości obrotowej, co przyczynia się do wzrostu sprawności efektywnej silnika.
Źródło:: Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2011, 28 (100) z. 1; 67-72
1733-8670
2392-0378
Pojawia się w:: Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:: Biblioteka Nauki

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