Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "cleaning" wg kryterium: Wszystkie pola

  Lista filtrów
Wyrównaj
Wyświetlanie 1-15 z 25
Tytuł:
The Parameters of Cleaning a CIP System Affected Energy Consumption and Cleaning Efficiency of the Plate Heat Exchanger
Autorzy:
Piepiórka-Stepuk, J.
Diakun, J.
Jakubowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/185066.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
cleaning
CIP system
energy consumption
cleaning parameters
cleanliness
cleaning efficiency
czyszczenie
System CIP
zużycie energii
parametry czyszczenia
czystość
Opis:
This paper presents a study on the effect of cleaning factors on the energy consumption of the cleaning process in a CIP system, and the correlation between single components of electricity necessary to perform this process and the cleanliness degree obtained. Studies were carried out in a laboratory cleaning station, wherein a plate heat exchanger contaminated with hot milk was included. The research program was developed according to a 5-level statistical plan. Based on the results, obtained with Experiment Planner 1.0, a regression function of energy requirement considering variables such as: cleaning time, temperature and flow rate of the cleaning liquid via the cleaned exchanger has been developed. Describing this relationship, linear and quadratic functions with double interactions were used. Significance level for the analysis was established at α = 0.05. Correlation analysis between components of the electricity necessary to perform the cleaning process (pump drive and heating of the cleaning agent) and the resulting degree of cleaning of heat exchanger plates was performed.
Źródło:
Chemical and Process Engineering; 2017, 38, 1; 111-120
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Alkalis in coal and coal cleaning products
Alkalia w węglu i produktach jego wzbogacania
Autorzy:
Bytnar, K.
Burmistrz, P.
Powiązania:
https://bibliotekanauki.pl/articles/218974.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
proces wzbogacania
substancja mineralna
węgiel
coal
cleaning process
alkalies
mineral matter
Opis:
In the coking process, the prevailing part of the alkalis contained in the coal charge goes to coke. The content of alkalis in coal (and also in coke) is determined mainly by the content of two elements: sodium and potasium. The presence of these elements in coal is connected with their occurrence in the mineral matter and moisture of coal. In the mineral matter and moisture of the coals used for the coke production determinable the content of sodium is 26.6 up to 62. per cent, whereas that of potassium is 37.1 up to 73.4 per cent of the total content of alkalis. Major carriers of alkalis are clay minerals. Occasionally alkalis are found in micas and feldspars. The fraction of alkalis contained in the moisture of the coal used for the production of coke in the total amount of alkalis contained there is 17.8 up to 62.0 per cent. The presence of sodium and potassium in the coal moisture is strictly connected with the presence of the chloride ions. The analysis of the water drained during process of the water-extracting from the flotoconcentrate showed that the Na to K mass ratio in the coal moisture is 20:1. Increased amount of the alkalis in the coal blends results in increased content of the alkalis in coke. This leads to the increase of the reactivity (CRI index), and to the decrease of strength (CSR index) determined with the Nippon Steel Co. method.
W procesie koksowania przeważająca część zawartych we wsadzie węglowym alkaliów przechodzi do koksu. Zawartość alkaliów w węglu, a co za tym idzie i w koksie determinowana jest głównie zawartością dwóch pierwiastków: sodu i potasu. Obecność tych pierwiastków w węglu wiąże się z występowaniem ich w substancji mineralnej i wilgoci węgla. W substancji mineralnej oraz wilgoci węgli stosowanych do produkcji koksu, oznaczona zawartość sodu wynosi od 26.6 do 62.9%, a zawartość potasu od 37.1 do 73.4% alkaliów ogółem. Głównymi nośnikami alkaliów w substancji mineralnej są minerały ilaste, sporadycznie też miki oraz skalenie. Udział alkaliów zawartych w wilgoci węgli stosowanych do produkcji koksu w ogólnej ilości zawartych w nim alkaliów wynosi dla badanych węgli od 17.8 do 62.0%. Obecność sodu i potasu w wilgoci węgla związana jest wyłącznie z obecnością w niej jonów chlorkowych. Wyniki analizy wody odprowadzanej z procesu wirowania flotokoncentratu wskazują, że stosunek masowy Na do K w wilgoci węgla wynosi 20:1. Wzrost zawartość wilgoci w koksie będący wynikiem ich zwiększonej ilości w mieszance węglowej prowadzi do wzrostu reaktywności (wskaźnik CRI) oraz spadku wytrzymałości (wskaźnik CSR) oznaczonych metoda Nippon Steel Co.
Źródło:
Archives of Mining Sciences; 2013, 58, 3; 913-924
0860-7001
Pojawia się w:
Archives of Mining Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Multiple Cleaning on the Detection Capabilities of ISFET Structures
Autorzy:
Kondracka, Kinga
Firek, Piotr
Grodzik, Marta
Szmidt, Maciej
Sawosz-Chwalibóg, Ewa
Szmidt, Jan
Powiązania:
https://bibliotekanauki.pl/articles/1844597.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
ISFET
sensor
I-V characteristics
cells
cleaning
Opis:
The Internet of Vehicles (IoVs) has become a vital research area in order to enhance passenger and road safety, increasing traffic efficiency and enhanced reliable connectivity. In this regard, for monitoring and controlling the communication between IoVs, routing protocols are deployed. Frequent changes that occur in the topology often leads to major challenges in IoVs, such as dynamic topology changes, shortest routing paths and also scalability. One of the best solutions for such challenges is “clustering”. This study focuses on IoVs’ stability and to create an efficient routing protocol in dynamic environment. In this context, we proposed a novel algorithm called Cluster-based enhanced AODV for IoVs (AODV-CD) to achieve stable and efficient clustering for simplifying routing and ensuring quality of service (QoS). Our proposed protocol enhances the overall network throughput and delivery ratio, with less routing load and less delay compared to AODV. Thus, extensive simulations are carried out in SUMO and NS2 for evaluating the efficiency of the AODV-CD that is superior to the classic AODV and other recent modified AODV algorithms.
Źródło:
International Journal of Electronics and Telecommunications; 2021, 67, 1; 23-28
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cleaning of process gas from gasification of solid recovered fluid — results of experimental research
Autorzy:
Sobolewski, A.
Szul, M.
Iluk, T.
Ostrowski, W.
Billig, T,
Powiązania:
https://bibliotekanauki.pl/articles/175137.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
gasification
SRF
process gas cleaning
high temperature filtration
oil scrubber
Opis:
The paper takes up the topic of energetic utilization of alternative fuels produced from wastes, particularly in case of solid recovered fuel gasification for cogeneration of heat and power in piston engine. Process gas cleaning for its energetic and chemical utilization has been discussed. Presented scope of research concerns technological designs for dry and wet gas cleaning methods developed by Institute for Chemical Processing of Coal. Furthermore identified main operational problems of both gas cleaning units have been presented. Description of the two types of gas cleaning units has been provided together with obtained results from laboratory analysis of moisture, tar and particle content measured in process gas generated from solid recovered fluid.
Źródło:
Transactions of the Institute of Fluid-Flow Machinery; 2017, 137; 59-70
0079-3205
Pojawia się w:
Transactions of the Institute of Fluid-Flow Machinery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fuzzy model of autogenous suspension coal cleaning
Model rozmyty procesu wzbogacania węgla w zawiesinie autogenicznej
Autorzy:
Benovic, T.
Miljanovic, I.
Vujic, S.
Powiązania:
https://bibliotekanauki.pl/articles/220188.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
logika rozmyta
modelowanie
wzbogacanie węgla
zawiesina autogeniczna
Parnaby
Ugljevik
fuzzy logic
modeling
coal cleaning
autogenous suspension
Opis:
The paper presents one of the possible approaches to fuzzy logic modeling of coal cleaning in autogenous suspension. In the scope of reviewing the problem in general, the process algorithm and the structural model of coal cleaning were set up. The paper deals with the flow of fuzzy logic model creation following the example of coal cleaning plant of the “Bogutovo selo” open pit mine of the Mine and Thermal Power Plant Ugljevik. The model is set up on the MATLAB software platform. Fuzzy model testing results, presented at the end of paper confirms applicability and reliability of the model. The discrepancies between the model and the real process parameters are within the limits of allowed industrial error.
W pracy przedstawiono jedną z dostępnych metod modelowania rozmytego zastosowaną do modelowania procesu wzbogacania węgla w zawiesinie autogenicznej. Analiza problemu obejmuje przedstawienie algorytmu procesu wzbogacania oraz jego model strukturalny. W pracy przedstawiono proces tworzenia modelu rozmytego na przykładzie zakładu wzbogacania ‘Bogutovo selo’ przy kopalni odkrywkowej będącej częścią zakładów górniczych i elektrowni Ugljevik. Model stworzono przy wykorzystaniu platformy MATLAB. Wyniki testowania modelu rozmytego zaprezentowane w artykule potwierdzają przydatność i wiarygodność modelu. Rozbieżności pomiędzy wynikami modelowania a parametrami rzeczywistych procesów mieszczą się w dopuszczalnych przy procesach przemysłowych granicach tolerancji błędu.
Źródło:
Archives of Mining Sciences; 2012, 57, 4; 843-860
0860-7001
Pojawia się w:
Archives of Mining Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dissolution Behavior of Metal Impurities and Improvement of Reclaimed Semiconductor Wafer Cleaning by Addition of Chelating Agent
Autorzy:
Ryu, Keunhyuk
Kim, Myungsuk
Roh, Jaeseok
Lee, Kun-Jae
Powiązania:
https://bibliotekanauki.pl/articles/2049175.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
reclaimed silicon wafer
wafer cleaning
metal impurity
metal complex
chelating agent
Opis:
As a wafer cleaning process, RCA (Radio Corporation of America) cleaning is mainly used. However, RCA cleaning has problems such as instability of bath life, re-adsorption of impurities and high-temperature cleaning. Herein, we tried to improve the purity of silicon wafers by using a chelating agent (oxalic acid) to solve these problems. Compounds produced by the reaction between the cleaning solution and each metal powder were identified by referring to the pourbaix diagram. All metals exhibited a particle size distribution of 10 μm or more before reaction, but a particle size distribution of 500 nm or less after reaction. In addition, it was confirmed that the metals before and after the reaction showed different absorbances. As a result of elemental analysis on the surface of the reclaimed silicon wafer cleaned through such a cleaning solution, it was confirmed that no secondary phase was detected other than Si.
Źródło:
Archives of Metallurgy and Materials; 2021, 66, 4; 977-981
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Coal Cleaning Versus the Reduction of Mercury and other Trace Elements’ Emissions from Coal Combustion Processes
Autorzy:
Zajusz-Zubek, E.
Konieczyński, J.
Powiązania:
https://bibliotekanauki.pl/articles/204840.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
heavy metals
steam coals
coal wet cleaning
densimetric fractions
mercury emission reduction
metale ciężkie
spalanie węgla
proces czyszczenia węgla
redukcja emisji rtęci
Opis:
Samples of steam coal used in heat and power plants as well as densimetric fractions obtained on a laboratory scale by dense organic liquid separation have been examined. The contents of ash, mercury, chromium, cadmium, copper, nickel and lead have been determined in coal, in the light and medium fraction as well as in the refuse. The degree of removal of mineral matter and the examined heavy metals as well as the coal combustible parts yield have been determined. Examination of 5 coals revealed that it is possible to remove 41% of mercury and more than 35% of other heavy metals bound to mineral matter in coal.
Źródło:
Archives of Environmental Protection; 2014, 40, 1; 115-127
2083-4772
2083-4810
Pojawia się w:
Archives of Environmental Protection
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of capillary pumping on the course of cleaning porous materials containing liquid contaminants using supercritical fluids – A pore network study
Autorzy:
Krzysztoforski, Jan
Khayrat, Karim
Henczka, Marek
Jenny, Patrick
Powiązania:
https://bibliotekanauki.pl/articles/2086809.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
porous material
supercritical fluid
mathematical modelling
cleaning
capillary pumping
materiał porowaty
płyn nadkrytyczny
modelowanie matematyczne
czyszczenie
pompowanie kapilarne
Opis:
The role of capillary pumping on the course of cleaning porous materials containing liquid contaminants using supercritical fluids was investigated numerically. As a specific process to be modelled, cleaning of porous membranes, contaminated with soybean oil, using supercritical carbon dioxide as the cleaning fluid (solvent) was considered. A 3D pore-network model, developed as an extension of a 2D drying model, was used for performing pore scale simulations. The influence of various process parameters, including the coordination number of the pore network, the computational domain size, and the external flow mass transfer resistance, on the strength of the capillary pumping effect was investigated. The capillary pumping effect increases with increasing domain size and decreasing external flow mass transfer resistance. For low coordination numbers of the pore network, the capillary pumping effect is not noticeable at macro scale, while for high coordination numbers, the opposite trend is observed – capillary pumping may influence the process at macro scale. In the investigated system, the coordination number of the pore network seems to be low, as no capillary pumping effects were observed at macro scale during experimental investigation and macro-scale modelling of the membrane cleaning process.
Źródło:
Chemical and Process Engineering; 2021, 42, 4; 349--368
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Field testing of acoustic cleaning system working in 670MW CFB boiler
Autorzy:
Mirek, P.
Powiązania:
https://bibliotekanauki.pl/articles/185357.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
acoustic cleaners
circulating fluidized bed
ash fouling
odkurzacz akustyczny
zanieczyszczenia
popiół
Opis:
The article reports the results of measurements of the acoustic pressure of acoustic waves generated by acoustic dust cleaners mounted in the convection pass of the 670MWth Circulating Fluidised Bed boiler. Based on measurements carried out and the spectral analysis of recorded signals it was found that the level of acoustic pressure generated by acoustic cleaners for the frequency of 100 Hz was too low for the efficient cleaning of the heated surfaces of the reheater RH2 and superheater SH3.
Źródło:
Chemical and Process Engineering; 2013, 34, 2; 283-291
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characterization of SnO2/TiO2 with the Addition of Polyethylene Glycol via Sol-Gel Method for Self-Cleaning Application
Autorzy:
Halin, Dewi Suriyani Che
Azliza, Azani
Razak, Kamrosni Abdul
Abdullah, Mohd Mustafa Al Bakri
Salleh, Mohd Arif Anuar Mohd
Wahab, Juyana A
Chobpattana, Varistha
Kaczmarek, Łukasz
Nabiałek, Marcin
Jeż, Bartłomiej
Powiązania:
https://bibliotekanauki.pl/articles/2203743.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
TiO2
SnO2
thin film
polyethylene glycol
self-cleaning
Opis:
TiO2 is one of the most widely used metal oxide semiconductors in the field of photocatalysis for the self-cleaning purpose to withdraw pollutants. Polyethylene glycol (PEG) is recommended as a stabilizer and booster during preparation of water-soluble TiO2. Preparation of SnO2/TiO2 thin film deposition on the surface of ceramic tile was carried out by the sol-gel spin coating method by adding different amount of PEG (0g, 0.2g, 0.4g, 0.6g, 0.8g) during the preparation of the sol precursor. The effects of PEG content and the annealing temperature on the phase composition, crystallite size and the hydrophilic properties of SnO2/TiO2 films were studied. The X-ray diffraction (XRD) spectra revealed different phases existed when the films were annealed at different annealing temperatures of 350°C, 550°C and 750°C with 0.4 g of PEG addition. The crystallite sizes of the films were measured using Scherrer equation. It shows crystallite size was dependent on crystal structure existed in the films. The films with mixed phases of brookite and rutile shows the smallest crystallite size. In order to measure the hydrophilicity properties of films, the water contact angles for each film with different content of PEG were measured. It can be observed that the water contact angle decreased with the increasing of the content of PEG. It shows the superhydrophilicity properties for the films with the 0.8 g of PEG annealed at 750°C. This demonstrates that the annealed temperature and the addition of PEG affect the phase composition and the hydrophilicity properties of the films.
Źródło:
Archives of Metallurgy and Materials; 2023, 68, 1; 243--248
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Eco-innovative method of cleaning heat exchangers from boiler scale
Autorzy:
Olczak, Piotr
Kowalski, Zygmunt
Kulczycka, Joanna
Makara, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/406832.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
heat exchanger
chemical treatment method
eco-innovative
boiler
Opis:
The operation of thermal devices and installations, in particular heat exchangers, is associated with the formation of various deposits of sediments, forming the boiler scale. The amount of precipitate depends on the quality of the flowing liquids treatment, as well as the intensity of the use of devices. There are both mechanical and chemical treatment methods to remove these deposits. The chemical methods of boiler scale treatment include the cleaning method consisting in dissolving boiler scale inside heat devices. Worked out descaling concentrate contains phosphoric acid (V) and the components that inhibit corrosion, anti-foam substances, as well as anti-microbial substances as formalin, ammonium chloride, copper sulphate and zinc sulfate. Dissolution of the boiler scale results in the formation of wastewater which can be totally utilized as raw materials in phosphoric fertilizer production. As a result, both the preparation produced and its use are entirely free from waste.
Źródło:
Management and Production Engineering Review; 2020, 11, 1; 23--30
2080-8208
2082-1344
Pojawia się w:
Management and Production Engineering Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Standaryzacja procesu oczyszczania maszynowego odlewów
Standardization of a Castings Shot-Blasting Process
Autorzy:
Grzymałowski, M.
Herberg, A.
Wrona, R.
Powiązania:
https://bibliotekanauki.pl/articles/380731.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
oczyszczanie odlewu
standaryzacja
oczyszczarka wirnikowa
casting cleaning
standards
rotor cleaner
Opis:
Standaryzacja jest działaniem w wyniku którego otrzymuje się stabilizowanie procesu technologicznego prowadzącego do osiągania optymalnych efektów. W niniejszym artykule tematem standaryzacji jest proces oczyszczania metodą strumieniowo-ścierną z zastosowaniem oczyszczarek wirnikowych. Scharakteryzowano zasadnicze etapy badawczo-diagnostyczne dotyczące zagadnień konstrukcyjnych w mechanizmach oczyszczarek, parametrów eksploatacyjnych oraz zagadnień organizacji prowadzenia procesu. Kryteriami, które przyjęto do oceny oczyszczania są: wydajność oczyszczarki, czas czyszczenia, skuteczność określana stopniem czystości powierzchni odlewów, minimalizacja zużycia ścierniwa oraz stopnień zużycia dynamicznych elementów oczyszczarek.
Standardization is a process which leads to the stabilization of an engineering process allowing it to achieve optimal results. This article is about the standardization of a process in which shot-blasting machines are used to clean castings by means of the jet-and-abrasion method. Characterized are the main aspects of diagnostic research regarding the construction of the shot-blasting machines, their operational parameters, and the organization of the shot-blasting process itself. The criteria adopted in order to evaluate the shot-blasting process are: capacity of the machines, cleaning time, effectiveness measured by the degree of casting surface finish, minimalization of wear of the abrasive material, and the wear of the movable parts of the shot-blasting machines.
Źródło:
Archives of Foundry Engineering; 2013, 13, 3 spec.; 39-44
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cleaning of pesticides from aqueous solution by a newly synthesized organoclay
Autorzy:
Baysal, Gülay
Powiązania:
https://bibliotekanauki.pl/articles/205085.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
adsorption isotherms and kinetics
1-methyl-di-octyl-1 phenyl ammonium iodide
toxic compounds
organoclay
Opis:
In the present study, the novel quaternary ammonium salt (QAS+), 1-methyl-di-octyl-1 phenyl ammonium iodide (QAS1), was synthesized by complete alkylation reaction. Sodium montmorillonite (Mt) was modified via an ion-exchange reaction with QAS1+. The modified material and quarternary ammonium salt (Mt1 and QAS1) were analyzed by nuclear magnetic resonance (NMR), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and scanning electron microscopy (SEM). Removal capacity of hydrophobic organic pollutants such as 4-nitrophenol (4-NP) and 2,4-dinitrophenol (2,4-DNP) from solution media of synthesized organoclay was evaluated. The optimum conditions and batch kinetics of adsorption of 4-nitrophenol and 2,4-dinitrophenol from aqueous solutions are reported. It was shown that the adsorption capacity decreased in the order 4-NP> 2,4-DNP. The total mass loss during the drying process was 66% and 78%, respectively. Thermodynamic parameters enthalpy (ΔH0) and entropy (ΔS0) and the mean free energy (E) for the adsorption of nitrophenol compounds (NCP) were determined.
Źródło:
Archives of Environmental Protection; 2019, 45, 3; 21-30
2083-4772
2083-4810
Pojawia się w:
Archives of Environmental Protection
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical studies of fluid flow in flat, narrow-gap channels simulating plate heat exchanger
Autorzy:
Piepiórka-Stepuk, J.
Jakubowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/185176.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
PHE
CFD
cleaning in CIP system
PWC
czyszczenie w systemie CIP
Opis:
The aim of this work was to present the numerical simulation results determining the distributions of flow velocity and pressure in the individual channels of a plate heat exchanger. The simulations have been conducted by means of the Finite Volume Method (FVM) of numerical computation using the ANSYS CFX software. The computational model constituted spaces between 10 flat, straight flow type plates of the heat exchanger. The obtained results of numerical simulations confirm the presence of inhomogeneous flow conditions in the neighbouring channels between the plates. The computations enabled to point out the regions on the plates, in which insufficient flow can result in problems with their cleaning. The results of this work constitute the first part of a research leading to an assessment of cleaning conditions in plate heat exchangers.
Źródło:
Chemical and Process Engineering; 2013, 34, 4; 507-514
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermal Cleaning and Melting of Fine Aluminium Alloy Chips
Autorzy:
Palimąka, P.
Powiązania:
https://bibliotekanauki.pl/articles/1840921.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
production waste
environmental protection
recycling aluminium
aluminium scrap
aluminium melting
odpady produkcyjne
ochrona środowiska
recykling aluminium
wióry aluminium
topienie aluminium
Opis:
Production waste is one of the major sources of aluminium for recycling. Depending on the waste sources, it can be directly melted in furnaces, pre-cleaned and then melted, or due to the small size of the material (powder or dust) left without remelting. The latter form of waste includes chips formed during mechanical cutting (sawing) of aluminium and its alloys. In this study, this type of chips (with the dimensions not exceeding 1 mm) were melted. The obtained results of laboratory tests have indicated that even chips of such small sizes pressed into cylindrical compacts can be remelted. The high recovery yield (up to 94%) and degree of metal coalescence (up to 100%) were achieved via thermal removal of impurities under controlled conditions of a gas atmosphere (argon or/and air), followed with consolidation of chips at a pressure of minimum 170 MPa and melting at 750oC with NaCl-KCl-Na3AlF6 salt flux.
Źródło:
Archives of Foundry Engineering; 2020, 20, 4; 91-96
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 25

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies