Temat: cooling process - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: The Complex Computer System Based on Cellular Automata Method Designed to Support Modelling of Laminar Cooling Processes
Autorzy:: Gołąb, R.
Madej, Ł.
Pietrzyk, M.
Tematy:: cellular automata
finite element method
cooling process; Pokaż więcej
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Powiązania:: https://bibliotekanauki.pl/articles/100057.pdf Link otwiera się w nowym oknie
Opis:: The user friendly computer system that have the capability of modelling material behaviour both at the macro and micro scales was developed in this work. The system was designed to predict microstructure evolution during phase transformation in laminar cooling conditions with the use of the multi scale cellular automata finite element (CAFE) model. The finite element (FE) part is based on the conventional Fourier type equation and is used to predict macroscopic temperature distribution. This is an input for the micro scale cellular automata (CA) model of austenite-ferrite phase transformation. To facilitate the research, proposed micro scale CA model was implemented within developed universal object-oriented programming framework CAF. Description of major assumptions and functionality of the developed numerical system including efficient Graphical User Interface (GUI) is presented in the paper. The intuitive visualization of data obtained in different length scales facilitates work with the software.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Influence of the Mould Cooling Process on the Quality and Properties of Aluminium Alloy
Autorzy:: Weiss, V.
Svobodova, J.
Tematy:: cooling process
quality
aluminium alloy
casting moulds
proces chłodzenia
jakość
stop aluminium
formy odlewnicze; Pokaż więcej
Wydawca:: Stowarzyszenie Menedżerów Jakości i Produkcji
Powiązania:: https://bibliotekanauki.pl/articles/111644.pdf Link otwiera się w nowym oknie
Opis:: The article deals with the effect on the quality of casting moulds (metal, bentonite mixture) on the structure of the alloy AlZn5,5MgCu and selected mechanical properties of the alloy. The effect of foundry moulds can significantly affect formation and range of crystal segregation and the subsequent thermal process of homogenization which has an influence on the final quality of the alloy. The research focuses on the formation and range of crystal segregation and its removal with homogenization annealing, in which the observed influence of individual factors influencing the diffusion process and quality of the aluminium alloy.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Modelling of phenomena in solid state for the steel casting cooled by liquid
Autorzy:: Kulawik, A.
Tematy:: heat treatment
phase transformation
convection
cooling process
liquid coolant
obróbka cieplna
przemiana fazowa
konwekcja
stygnięcie odlewu
płyn niskokrzepnący; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/381245.pdf Link otwiera się w nowym oknie
Opis:: In this paper a mathematical model of cooling process for steel castings is presented. Effect of convective motion of the coolant on material structure after cooling process is investigated. Mathematical and numerical model based on Generalized Difference Method for axysimmertric elements is used. To solve the Navier-Stokes equation the characteristic based split scheme (CBS) has been applied. The solution of the heat transport equation with the convective term has been obtained by a stabilized meshless method. To determine of the phase transformation the macroscopic model built on the basis of Time Temperature Transformation diagrams for continuous cooling of medium-carbon steel has been used. The temporary temperature fields, the phase transformation, thermal and structural strains for the cooled element and the fields of temperature and velocity for the coolant have been determined.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Heat transfer modelling in an annular disc under heating and cooling processes with stress analysis
Autorzy:: Varhadpande, Indrajeet
Murthy, V. R. K.
Lamba, Navneet Kumar
Tematy:: proces nagrzewania
proces chłodzenia
temperatura
naprężenie
memory related derivatives
heating and cooling process
integral transform
temperature
stress function; Pokaż więcej
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Powiązania:: https://bibliotekanauki.pl/articles/59123668.pdf Link otwiera się w nowym oknie
Opis:: The goal of this effort is to determine the interaction among the heating and cooling processes in order to understand how solids behave when subjected to temperature changes. In this instance, the temperature, displacement, and stress relations are determined analytically and numerically while a thin annular disc is subjected to both the heating and cooling processes. The ability of a material to withstand stress is essential for the design of diverse mechanical structures that aim to enhance performance, durability, characteristics, and strength. This ability is demonstrated in many physical processes where the material structure crosses over into heating and cooling processes. Furthermore, memory derivatives used in the modelling of heat transfer equations more accurately depict the memory behaviour of an imagined disc and explain its physical significance.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Identification of the Parameters of the Model Generating the Microstructure in the Integrated Heating-Remelting-Cooling Process
Autorzy:: Marynowski, Przemysław
Hojny, Marcin
Dębiński, Tomasz
Cedzidło, D.
Tematy:: heating-remelting-cooling process
Gleeble 3800
Monte Carlo method
grains
ogrzewanie
przetapianie
chłodzenie
Metoda Monte Carlo
ziarna; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czasopisma i Monografie PAN
Powiązania:: https://bibliotekanauki.pl/articles/27314150.pdf Link otwiera się w nowym oknie
Opis:: This paper identifies and describes the parameters of a numerical model generating the microstructure in the integrated heating-remelting-cooling process of steel specimens. The numerical model allows the heating-remelting-cooling process to be simulated comprehensively. The model is based on the Monte Carlo (MC) method and the finite element method (FEM), and works within the entire volume of the steel sample, contrary to previous studies, in which calculations were carried out for selected, relatively small areas. Experimental studies constituting the basis for the identification and description of model parameters such as: probability function, initial number of orientations, number of cells and number of MC steps were carried out using the Gleeble 3800 thermo-mechanical simulator. The use of GPU capabilities improved the performance of the numerical model and significantly reduced the simulation time. Thanks to the significant acceleration of simulation times, it became possible to comprehensively implement a numerical model of the heating-transformation-cooling process in the entire volume of the test sample. The paper is supplemented by results of performance tests of the numerical model and results of simulation tests.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Experimental investigation of limit parameters of direct contact condensation in the heat exchanger for waste heat recovery
Autorzy:: Nazarova, Iryna
Gutkowski, Artur
Tematy:: direct contact heat mass exchanger
direct contact condensation
process of cooling flue gas
air-water vapour mixture; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czasopisma i Monografie PAN
Powiązania:: https://bibliotekanauki.pl/articles/59112058.pdf Link otwiera się w nowym oknie
Opis:: In the present study, a suitable composition of parameters has been obtained to provide an efficient process of cooling flue gas with complete condensation of water vapour from air-water vapour mixture on a water film in co-current upward flow in the tube of the direct contact heat and mass exchanger. The results showed that the value of the irrigation density depends on the velocity of the air-water vapour mixture and the initial vapour content and should be calculated from an empirical equation. The active pipe height depends on the velocity of the air-water vapour mixture and the initial vapour content and should also be calculated from an empirical equation. For example, if the initial vapour content of the air-water vapour mixture is 11%, the velocity of the mixture is 20.8 m/s the height of the channel should not exceed 0.460 m. The value of the water heating limit temperature increases from 46°C to 62°C with a change in the initial vapour content from 11% to 30%. The present experimental results could be helpful in the design of direct contact heat and mass exchangers for waste heat recovery.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Operating evaluation of a cooler and a freezer used for freezing of small wheat bakery products
Ocena eksploatacyjna chłodziarki i zamrażarki wykorzystanych do mrożenia drobnego pieczywa pszennego
Autorzy:: Mach, P.
Pałacha, Z.
Tematy:: bakery
wheat bakery product
cooling
freezing process
operating evaluation; Pokaż więcej
Wydawca:: Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Powiązania:: https://bibliotekanauki.pl/articles/13925560.pdf Link otwiera się w nowym oknie
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Effect of Intensive Cooling of Alloy AC-AlSi7Mg with Alloy Additions on Microstructure and Mechanical Properties
Autorzy:: Pisarek, B.
Rapiejko, C.
Pacyniak, T.
Tematy:: solidification process
aluminum alloy
alloy additions
intensive cooling
mechanical properties; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/356173.pdf Link otwiera się w nowym oknie
Opis:: The work presents results of the investigations of effect of intensive cooling of alloy AC-AlSi7Mg with alloy additions on microstructure and mechanical properties of the obtained casts. The experimental casts were made in ceramic molds preliminarily heated to 180°C, into which AC-AlSi7Mg with alloy additions was poured. Within implementation of the research, a comparison was made of the microstructure and mechanical properties of the casts obtained in ceramic molds cooled at ambient temperature and the ones intensively cooled in a cooling liquid. Kinetics and dynamics thermal effects recorded by the TDA method were compared. Metallographic tests were performed with the use of optical microscope and strength properties of the obtained casts were examined: UTS, Elongation and HB hardness.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: A dedicated sensitivity analysis and optimization application for industrial processes
Autorzy:: Myczkowska, Kamila
Szeliga, Danuta
Tematy:: sensitivity analysis
modelling of industrial process
optimization
model validation
cooling of rails; Pokaż więcej
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Powiązania:: https://bibliotekanauki.pl/articles/29520087.pdf Link otwiera się w nowym oknie
Opis:: The paper describes the architecture and the use case of the developed Modelbox system for sensitivity analysis (SA), uncertainty analysis (UA) and the subsequent optimization of industrial processes. The proposed solution addresses the most common practical and technical problems encountered by researchers and engineers when performing sensitivity analysis. It combines the functions from the numerical toolbox with a simulation management system. Maintaining usability and a good user experience while managing complex investigations of time-consuming industrial process simulations is a very important feature of the system. Several improvements were introduced to optimize the computation time of analysis/modelling tasks, including the automatization of distributed calculations, persistent, transparent caching of simulation data and duration estimations from collected statistics. The system has the ability to perform remote, parallel, asynchronous computations of both analytic algorithms and numerical simulations. The system is dynamically scalable horizontally by using serverless computing endpoints and thus it can be easily adapted to the user’s current needs in a flexible way. Modelbox provides web-based access to analysis/modelling tasks from sampling, SA/UA, optimization to metamodelling. It is extended with numerous interactive visualization components for effective results control. In addition, to access data from the completed analysis, the system supports convergence tracking for SA estimates and intermediate optimization results. The process of controlled cooling of rails was considered as a case study. The formulated optimization task was to find a combination of process parameters that ensures a minimum volume fraction of bainite along with required interlamellar spacing and optimal homogeneity of hardness. Different sensitivity analysis methods were used to evaluate the significance of all variables with respect to their influence on the model output.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Analiza wykorzystania płytowych wymienników ciepła w instalacji adiabatycznego chłodzenia powietrza
Analysis of the plate heat exchangers application in the adiabatic air cooling system
Autorzy:: Frank, K.
Taut, U.
Witczak, S.
Tematy:: chłodzenie wyparne
płytowe wymienniki ciepła modelowanie procesu
evaporative cooling
plate heat exchangers
process modeling; Pokaż więcej
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:: https://bibliotekanauki.pl/articles/2072355.pdf Link otwiera się w nowym oknie
Opis:: W pracy dokonano analizy możliwości wykorzystania płytowych wymienników ciepła w przemysłowej instalacji chłodzenia wyparnego powietrza. Przedstawiono wybrane elementy algorytmu obliczeń numerycznych wraz z wynikami dla warunków prowadzonych badań doświadczalnych. Dokonano porównania wyników badań z wartościami obliczonymi i wykazano ich dużą zgodność. Omówiono warunki eksploatacji instalacji oraz wskazano na możliwość jej optymalizacji.
Analysis of possible use of plate heat exchangers in the industrial air evaporative cooling system is presented in the paper. The selected elements of numerical algorithm calculations with the results for conducted experimental research conditions are given. The comparison between experimental and calculated results was made showing a high accuracy. Exploitation conditions of the installation are discussed and possibility of its optimization is indicated.
Dostawca treści:: Biblioteka Nauki

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