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Wyświetlanie 1-10 z 19
Tytuł:
Application of Strain Gauges in Measurements of Strain Distribution in Complex Objects
Autorzy:
Tutak, P.
Powiązania:
https://bibliotekanauki.pl/articles/108730.pdf
Data publikacji:
2014
Wydawca:
Społeczna Akademia Nauk w Łodzi
Tematy:
strain gauge
FEA
charge air cooler
thermal cycle
Opis:
This article presents an application of strain gauges in measurements of strain which occurs in charge air cooler during the thermal cycle test. The work shows the main idea of measuring system based on strain gauges and important aspects that should be considered when performing measurement. In this article there has been also presented construction and principle operation of a strain gauge measurement system.
Źródło:
Journal of Applied Computer Science Methods; 2014, 6 No. 2; 135-145
1689-9636
Pojawia się w:
Journal of Applied Computer Science Methods
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of Moldflow Simulation in Injection Molding of Plastic Tank
Autorzy:
Tutak, P.
Powiązania:
https://bibliotekanauki.pl/articles/108796.pdf
Data publikacji:
2017
Wydawca:
Społeczna Akademia Nauk w Łodzi
Tematy:
simulation
moldflow
tank
charge air cooler
injection molding
Opis:
This article presents an application of moldflow simulation to optimize the injection molding process of charge air cooler plastic tank. The work shows the advantages of this kind of simulation software and information that it can provide. It also explains how big role today play simulation softwares and how they can improve product and reduce development cost.
Źródło:
Journal of Applied Computer Science Methods; 2017, 9 No. 1; 79-88
1689-9636
Pojawia się w:
Journal of Applied Computer Science Methods
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Improvement of the cargo fleet vessels power plants ecological indexes by development of the exhaust gas systems
Autorzy:
Kuznetsov, Valerii
Dymo, Boris
Kuznetsova, Svitlana
Bondarenko, Mykola
Voloshyn, Andrii
Powiązania:
https://bibliotekanauki.pl/articles/1573635.pdf
Data publikacji:
2021
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
marine power plant
emissions
gas-air cooler
nozzle
intensification
Opis:
Modernisation of the power plants of cargo fleet vessels to satisfy the requirements set out by the International Maritime Organisation is an urgent scientific and technical problem. The article presents the results of developing a solution to this problem that focuses on the exhaust gas system. We propose the use of ejection nozzles as part of this system. It was found that when the ejection coefficient in these nozzles is n = 3, it is possible to exclude the use of SCR reactors, thus reducing the operating costs of the marine power plant. Using a mathematical modelling method, the efficiency of operation of six types of nozzle as part of the exhaust gas system was investigated, and a constructive layout was proposed for the gas ducts and inlet louvres for supplying ambient air. To increase the efficiency of the proposed system, we consider several options for intensifying heat transfer processes through the use of dimple systems in the nozzles and nozzles with swirling flow. We found that these technical solutions would make it possible to further increase the efficiency of the systems by up to 19% abs.
Źródło:
Polish Maritime Research; 2021, 1; 97-104
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research on influence of condition elements the supercharger system on the parameters of the marine diesel engine
Autorzy:
Witkowski, K.
Powiązania:
https://bibliotekanauki.pl/articles/244429.pdf
Data publikacji:
2013
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
ship diesel engine
turbocharger system
active experiment
air filter
compressor
air cooler
Opis:
This paper presents the issues related to the impact of the technical condition elements of the turbocharger system on the parameters of marine diesel engine. Turbocharger system, in addition to the injection system has a significant impact on the quality of the working process, the economics and reliability of the engine. Contamination of elements of the turbocharger system are the most common faults (24.7% of all damage to marine engines). Contamination the following relates to elements: air filters, compressor, air cooler, scavenging system elements and turbine. The detailed data follows that the contamination are usually in: flow channels supercharger – 56%, turbine flow channels – 22%, air cooler – 11%, air filter – 6%, scavenging system elements – 4%, other elements – 1%. The technical condition influence of air filter, compressor and air cooler was analyzed. The analysis was supported by the results of their own research, carried out in the laboratory on the marine diesel engine, four– stroke 3AL25/30 SULZER, supercharged turbocharger VTR160N Brown Boveri. The research was performed in the form of an active experiment to simulate contamination of particular elements of the turbocharging system. Technical condition change of the air filter, the air compressor and the air cooler have been investigated.
Źródło:
Journal of KONES; 2013, 20, 1; 375-380
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of rational design values for gas-air coolers components of exhaust gases of marine power plants
Autorzy:
Kuznetsova, Svitlana
Kuznetsov, Valerii
Voloshyn, Andrii
Powiązania:
https://bibliotekanauki.pl/articles/34615989.pdf
Data publikacji:
2023
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
vessel
marine power plant
environmental parameters
emissions
gas-air cooler
nozzle
Opis:
Modernisation of marine power plants in the transport vessel fleet to satisfy the requirements of the International Maritime Organization is an urgent scientific and technical problem. Currently, the use of catalytic selective filters, dry and wet scrubber systems and exhaust gas recirculation for marine diesel engines is widely used for this purpose. An analysis of the use of ejection gas-air coolers is presented as an additional method of emission reduction. However, the use of such device does not neutralise the harmful emissions of power plant engines, but only increases the volume concentration of their exhaust gases. But this will help to increase the efficiency of dispersion of harmful emissions, by reducing the concentration of harmful emissions to values not exceeding the maximum permissible concentrations. Its efficiency depends on the load mode of the diesel engine. It is found that the initial concentration of harmful substances in combustion products due to their dilution with fresh air at 100% engine load is reduced by about 50%. The values of the reduction of the concentration and temperature of exhaust gases with the reduction of the engine load to 75% and 50% depending on the louvre angle are obtained. It is proved that ejection gas-air coolers can be an effective additional means for compliance with modern environmental parameters, especially when vessels are in special areas of the world’s oceans.
Źródło:
Polish Maritime Research; 2023, 3; 81-88
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chłodzenie powietrza małogabarytowymi wodnymi chłodnicami ścianowymi
Air cooling by a small-sized water longwall air coolers
Autorzy:
Filek, K.
Franczuk, W.
Łuska, P.
Nowak, B.
Roszkowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/350238.pdf
Data publikacji:
2005
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
chłodzenie powietrza
przeponowa chłodnica powietrza
klimatyzacja kopalń
air cooling
mine air conditioning
air cooler
Opis:
W artykule przedstawiono wyniki pomiarów temperatury wody chłodzącej oraz temperatury i wilgotności chłodzonego powietrza, wykonanych w ścianie 3 pokładu 502, partii J KWK "Śląsk", w strefie pracy systemu złożonego z czterech małogabarytowych wodnych chłodnic przeponowych (są to pierwsze tego typu urządzenia wykonane w Polsce - otrzymały oznaczenie SCP-40). Dla każdej chłodnicy ścianowej rezultaty pomiarów jej mocy cieplnej oraz temperatury i wilgotności właściwej powietrza schłodzonego porównane zostały z wynikami obliczeń, które wykonano, wykorzystując zamieszczone w artykule równania. Badania przeprowadzono dla dwóch wariantów połączeń chłodnic od strony wody - szeregowego (wariant A) i szeregowo-równoległego (wariant B). Wyniki pomiarów i obliczeń zestawiono w tabelach i zilustrowano na wykresach. Przeprowadzone badania pozwalają stwierdzić, że sumaryczna moc cieplna czterech chłodnic mieści się w granicach 120-130 kW. Większa moc układu z szeregowo-równoległym połączeniem chłodnic uwidacznia się w postaci nieco niższej temperatury powietrza w wyrobisku - za wylotem ściany obniżenie temperatury powietrza w porównaniu z sytuacją bez chłodzenia wyniosło w wariancie A 2,2 stopni Celsjusza, a w wariancie B 2,8 stopni Celsjusza.
The results of measurements of cooling water temperature and temperature and humidity of cooled air, which were taken in longwall no. 3 of seam no. 502 at part J in "Śląsk" Colliery during the operation of a unit consisting of 4 small-sized diaphragm water air coolers (these are the first units of this kind in Poland) are presented in this paper. The measurement results of heat power for each air-cooler, temperature and specific humidity of cooled air were compared to calculation results, which were obtained on the basis of the equations presented in the paper. The research was conducted for two variants of air-coolers' connection to a water pipe - in series (variant A) and in series - parallel (variant B). The results of calculations and measurements are presented in the tables and the graphs. The conducted research allows to determine that total heat power of four air-coolers is within limits 120--130 kW. The greater power of the system with a series-parallel coolers' connection can be observed in the form of a slightly lower air temperature in the longwall; behind the outlet of the longwall air temperature was reduced by 2.2 degrees of Celsius (variant A) and 2.8 degrees of Celsius (variant B) in comparison with the situation without cooling.
Źródło:
Górnictwo i Geoinżynieria; 2005, 29, 1; 21-38
1732-6702
Pojawia się w:
Górnictwo i Geoinżynieria
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Possibilities for Improving the Cooling Systems of IC Engines of Marine Power Plants
Autorzy:
Moshentsev, Yuryi
Gogorenko, Oleksiy
Dvirna, Olha
Powiązania:
https://bibliotekanauki.pl/articles/2201716.pdf
Data publikacji:
2022
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
central cooler
charge air cooler
cooling system
heat transfer surface
marine diesel engine
oil coolers
Opis:
Modern cooling systems for large ships are quite complex. As a rule, such systems are common (combined) for the main and auxiliaries engines. With the auxiliary engines running constantly, even when parked, this system design allows to keep it warm and ready for a quick start of the main engines at any time. Currently, various schemes of such systems are used, including those that are irrational from our point of view. At the same time, there are systems whose schemes are quite consistent with our idea of the rational forms of such structures. It is important to note, and it is saying about it in an article, that such schemes may have a number of significant differences, but at the same time they will comply with the rationality principle if certain rules for the formation of such systems are followed. These schemes will have close compactness. It is also important that there is the possibility of further improvement of such schemes based on certain rules. This improvement is possible due to the introduction of additional heat dissipaters and the organization of appropriate chains of heat sources and heat dissipaters. The article discusses various options for rational schemes of the cooling system for the same ship power plant, as well as the possibility of further improvement of this scheme. It is shown that an increase in the number of coolants of the internal circuit coolant from one to three can reduce the total mass of the heat exchanger cores by 18 %.
Źródło:
Advances in Science and Technology. Research Journal; 2022, 16, 3; 183--192
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The development of long-range heat transfer surfaces for marine diesel engine charge air coolers
Autorzy:
Kuznetsov, Valerii
Gogorenko, Oleksiy
Kuznetsova, Svetlana
Powiązania:
https://bibliotekanauki.pl/articles/1818882.pdf
Data publikacji:
2021
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
marine diesel engines
charge air cooler
heat transfer surface
efficiency
finns
dimples
nonround cross section tube
Opis:
Charge air cooling is essential for the efficient operation of marine diesel engines. This work presents the results of research on the characteristics of long-range heat transfer surfaces for marine diesel engines. Elliptical and flat-oval tubes were considered. This study was carried out using mathematical models that consisted of the equations for energy conservation, motion, continuity, and state. The RSM turbulence model was used to close the system of equations. To solve the resulting system of equations, the RANS approach was used, which was implemented in the software package Code Saturne with a free license and the SimScale cloud service. The mathematical model was verified by comparing the model results with the experimental results obtained using a prototype heat-exchange surface of a charge air cooler at a test bench. The discrepancy between the theoretical and experimental heat transfer coefficient α was ≤ 8.3%. An estimate of the compactness of smooth elliptical and flat-oval tube banks compared with round ones was carried out. A 19.6% increase in compactness was obtained for elliptical tubes and 17.5% for flat-oval tubes. Based on the profiled finning surfaces, it is possible to improve their thermohydraulic characteristics by up to 40% when using them together with elliptical tubes compared with round ones and up to 26% when using them with flat-oval tubes.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2021, 65 (137); 51-57
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rational Liquid Cooling Systems of Internal Combustion Engines
Autorzy:
Moshentsev, Yuryi
Gogorenko, Oleksiy
Dvirna, Olha
Powiązania:
https://bibliotekanauki.pl/articles/2022422.pdf
Data publikacji:
2022
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
charge air cooler
cooling systems
heat transfer surface
Internal combustion engines
oil coolers
low-flow system
Opis:
The scheme of the cooling system is considered, which can be the basis for creating the most efficient cooling systems for IC engines of any purpose. It is assumed that the use of any other scheme is devoid of a rational basis. The scheme consists of two connected circulation circuits, in one of which the coolant flow rate is an order of magnitude less than in the second. The engine is included in a circuit with increased coolant flow. All heat exchangers are in the second circuit. Rules for the formation of such systems are formulated. The basis of the method for calculating such systems is considered. It is indicated that the flow rate through each heat exchanger must be determined by calculation to ensure the maximum efficiency of the cooling system. The considered scheme allows to provide the maximum possible depth of charge air cooling, if its temperature is not specified, or to ensure the minimum cost and compactness of the cooling system, if this temperature is known. The scheme allows regulating the temperatures of the cooling fluids of the system with all kinds of changes in the engine operating conditions and the ambient temperature.
Źródło:
Advances in Science and Technology. Research Journal; 2022, 16, 1; 158-169
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Building a non-homogeneous thermal environment for energy savings in the face of deep mines
Autorzy:
Li, Xian
Wu, Yaru
Zhang, Yunfei
Powiązania:
https://bibliotekanauki.pl/articles/2073873.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
kopalnia
chłodzenie kopalni
klimatyzacja w kopalni
mine face
cooling strategy
non-homogeneous environment
air cooler
necessary cooling space
Opis:
Heat exhaustion of mining environments can cause a significant threat to human health. The existing cooling strategies for the mine face aim to cool the whole face. However, the necessary cooling space for the face is small, with a considerable amount of energy for cooling being wasted. Necessary cooling space is a space occupied by the workers in the face. This study proposed to build a non-homogeneous thermal environment for cost-effective energy savings in the face. An inlet air cooler was laid out in the intake airway to cool the whole face to some extent, and the tracking air cooler was designed to track the worker who constantly moved to improve the thermal environment. The cooling load and air distribution for this cooling strategy were investigated. In addition, the airflow in the face was solved numerically to estimate the cooling effect. The results revealed that an average energy saving of approximately 35% could be achieved. The thermal environment of the necessary cooling space within at least 10 m was significantly improved. This cooling strategy should be taken into account in mine cooling.
Źródło:
Archives of Mining Sciences; 2021, 66, 3; 457--474
0860-7001
Pojawia się w:
Archives of Mining Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 19

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