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Tytuł:
Tool path definition in Virtual Machines world
Autorzy:
Wypysiński, R.
Powiązania:
https://bibliotekanauki.pl/articles/132140.pdf
Data publikacji:
2014
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
virtual machine
virtual machining
machine simulator
simulation process
simulation software
Eureka
Opis:
Virtual Machine (VM), called also machine simulator, is 3D computer model which is geometrically and functionally the same like real machine (CNC machine tool or robot). They are used mainly for different kind of syntax errors and collision detection in CNC programs. Whole simulation process is also called Virtual Machining. This kind of off-line programming require CAM software support to generate tool paths and transform them to machine commands. The most advanced virtual machining software gives more possibilities to influence machines behavior – it is not only simulation software. This article describe it based on Eureka virtual machining software.
Źródło:
Advanced Technologies in Mechanics; 2014, 1, no. 1 (1); 15-18
2392-0327
Pojawia się w:
Advanced Technologies in Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of transportation system with the use of Petri nets
Autorzy:
Kowalski, M.
Magott, J.
Nowakowski, T.
Werbińska-Wojciechowska, S.
Powiązania:
https://bibliotekanauki.pl/articles/2069666.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
logistic support system
transportation system
procurement process
Petri nets
simulation process
Opis:
The paper considers problem of city transportation system performance. Reliability analysis of such a complex system is complicated by several factors. One of them is the possibility of logistic support elements unreliability defined as unavailability of spare elements when desired, what in result may lead to decrease of performance of the system being supported. Thus, both systems must be considered in a single model. However, the simultaneous setting of all structural parameters (e.g. redundancy, repair shop capacity) and control variables (e.g. spare part inventory levels, maintenance policy parameters, time resource) is mathematically a hard problem. This paper investigates Petri net model of the system with the use of Monte Carlo simulation as a solution technique. Comparison of the simulation results with characteristics of real-life system is given.
Źródło:
Journal of Polish Safety and Reliability Association; 2009, 2; 265--276
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application for simulating gyro-compass behavior
Autorzy:
Jaskólski, K.
Powiązania:
https://bibliotekanauki.pl/articles/320919.pdf
Data publikacji:
2016
Wydawca:
Polskie Forum Nawigacyjne
Tematy:
gyro-compass
compass error
process simulation
Opis:
Resolution of International Maritime Organization (IMO Res. A.424 (XI)), International Convention for the Safety of Life at Sea (SOLAS V/19.2.5) and consequently ‘Provisions Survey of Ships Marine’, part V, contained in the Polish Register of Shipping impose an obligation to fit ships with gyro-compass as one of the most complex marine equipment has found in the curricula of seafarers at the operational level (IMO Model Course 7.03). Curriculum involves the use real navigation devices. In addition, the adaptation of teaching facilities to meet the needs of the training process often requires the development of educa-tional aids in the form of simulators and applications that represent the construction and operation of navigation devices. The article presents possibilities of the application — gyro-compass simulator developed for the requirements of the Institute of Navigation and Maritime Hydrography PNA. Among others, the program is used to simulate the conditions in which you can expect the occurrence of different types of gyro-compass deviation. Designed software is expected to improve the educational process, to help the students assimilate the content of the curriculum in the field of classic gyro-compasses and familiarize trainees with static and dynamic errors occurring with the change of operating conditions.
Obowiązek wyposażenia jednostek pływających w urządzenia żyrokompasowe reguluje rezolucja Międzynarodowej Organizacji Morskiej (IMO Res. A.424 (XI), międzynarodowa konwencja o bezpieczeństwie życia na morzu (SOLAS V/19.2.5) i w konsekwencji zawarte w Polskim Rejestrze Statków „Przepisy nadzoru konwencyjnego statków mor-skich”, cz. V. Tematyka dotycząca kompasów żyroskopowych jako jednych z najbardziej złożonych urządzeń okrętowych znalazła miejsce w programach nauczania kadr morskich na poziomie operacyjnym (IMO Model Course 7.03). Program szkolenia przewiduje wykorzystanie faktycznych urządzeń nawigacyjnych. Dodatkowo dostosowanie bazy dydaktycznej do potrzeb procesu szkolenia często wymaga opracowania pomocy naukowych w postaci symulatorów i programów przedstawiających budowę i zasadę działania urządzeń nawigacyjnych. Artykuł prezentuje możliwości aplikacji symulującej kompas żyroskopowy, opracowanej na potrzeby Instytutu Nawigacji i Hydrografii Morskiej AMW. Program służy między innymi do symulowania warunków, w jakich można spodziewać się występowania różnych typów dewiacji żyrokompasowych. Zaprojektowane oprogramowanie ma uskutecznić proces dydaktyczny, pomóc słuchaczom przyswoić treści programowe z zakresu klasycznych kompasów żyroskopowych oraz zapoznać szkolonych z błędami statycznymi i dynamicznymi pojawiającymi się wraz ze zmianą warunków pracy urządzenia.
Źródło:
Annual of Navigation; 2016, 23; 159-172
1640-8632
Pojawia się w:
Annual of Navigation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling the Work of Multi-spindle Machining Centers with the Petri Nets
Autorzy:
Stryczek, Roman
Powiązania:
https://bibliotekanauki.pl/articles/24200521.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
stochastic petri nets
machining center
process modeling
process simulation
Opis:
The article presents the results of the simulation studies concerning the impact of random production interruptions on the efficiency of multi-spindle machining centers. Four different machining center configuration models were developed using a dedicated class of stochastic Petri nets. In addition to the number of machine spindles, the number of simultaneously mounted parts, loading time of parts, their machining time, and reliability parameters regarding the frequency of machine interruptions caused by random factors were also taken into account as model parameters. A series of virtual tests was carried out for machining processes over a period of 1000 hours of operation. Analysis of the results confirmed the purpose of conducting simulation tests prior to making a decision regarding the purchase of a multispindle milling center. This work fills the existing research gap, as there are no examples in the technical literature of evaluating the effectiveness of multi-spindle machining centers.
Źródło:
Management and Production Engineering Review; 2023, 14, 3; 16--26
2080-8208
2082-1344
Pojawia się w:
Management and Production Engineering Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Improved method of gear hobbing computer aided simulation
Autorzy:
Hrytsay, Ihor
Stupnytskyy, Vadym
Topchii, Vladyslav
Powiązania:
https://bibliotekanauki.pl/articles/140008.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
gear hobbing
cutting process simulation
kinematics of cutting
Opis:
Simulation studies of the hobbing process kinematics can effectively improve the accuracy of the machined gears. The parameters of the cut-off layers constitute the basis for predicting the cutting forces and the workpiece stress-strain state. Usually applied methods for simulation of the hobbing process are based on simplified cutting schemes. Therefore, there are significant differences between the simulated parameters and the real ones. A new method of hobbing process modeling is described in the article. The proposed method is more appropriate, since the algorithm for the momentary transition surfaces formation and computer simulation of the 3D chip cutting sections are based on the results of hobbing cutting processes kinematics and on rheological analysis of the hob cutting process formation. The hobbing process is nonstationary due to the changes in the intensity of plastic strain of the material. The total cutting force is represented as a function of two time-variable parameters, such as the chip’s 3D parameters and the chip thickness ratio depending on the parameters of the machined layer.
Źródło:
Archive of Mechanical Engineering; 2019, LXVI, 4; 475-494
0004-0738
Pojawia się w:
Archive of Mechanical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Network analysis for artificial intelligent micro-bearing systems
Autorzy:
Wierzcholski, K.
Łupicka, O.
Powiązania:
https://bibliotekanauki.pl/articles/243326.pdf
Data publikacji:
2009
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
network analysis
choice process simulation
most proper scheme
Opis:
This paper presents the some implementation of network analysis in logical, topological form as a artificial intelligence component applied for determination of optimum system design regard to the micro-bearing operat mg parameters such as carrying load capacity, friction forces, friction coefficient and micro-bearing wear. Efficient functioning of slide micro-bearings systems require to choice the proper Journal shapes, bearing materials, roughness of bearing surfaces and many other features to which belongs capability to the processes control. Artificial intelligence of micro-bearing leads to the creating and indicating of the network logical models to describe most simple and most proper topological graphical schemes presenting the design of anticipated processes. Application of the logical network analysis into the micro-bearing HDD design is the subject-matter of this paper. Logical network analysis in graphical form as a mathematical implementation for intelligent micro-bearing mtmerical calculations is presented in this paper. Presented paper establish the scheme of calculation algorithm oj hydrodynamic pressure and carrying capacity changes in micro-bearings for various Journal shapes and for various geometries.
Źródło:
Journal of KONES; 2009, 16, 3; 489-495
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Process simulation of dimethyl ether synthesis via methanol vapor phase dehydration
Autorzy:
Bai, Z.
Ma, H.
Zhang, H.
Ying, W.
Fang, D.
Powiązania:
https://bibliotekanauki.pl/articles/779378.pdf
Data publikacji:
2013
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
dimethyl ether
methanol dehydration to DME
process simulation
Opis:
The production processes included catalytic dehydration of methanol in an adiabatic fixed-bed reactor and two columns product separations. In this study, the technological process for dimethyl ether (DME) synthesis is built on PRO/II platform based on the combined parameters of the reaction dynamic model for methanol dehydration reaction, the improved NRTL model of the liquid phase, the PR model of vapor phase. In order to validate the proposed model, the simulation results have been compared with the available data from a set of industrial production equipment with a production capacity of 200 000 tonnes per annum. A comparison between the calculated and measured results has proved that these results are satisfactory. The bed height and the volume of the catalytic bed are calculated aim at one million t/a DME yields and while taking account of high-purity DME production. After discussing the influence of feed stage location and reflux ratio for DME product purity, the suitable unit operation conditions are chosen. Accordingly, accurate process simulation results provide the basis and guidance for an improvement and development of the similar industrial device.
Źródło:
Polish Journal of Chemical Technology; 2013, 15, 2; 122-127
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Goal Programming-Monte Carlo Simulation Methodology for Modeling Process Quality Control
Autorzy:
Morán-Zabala, Jean P.
Cogollo-Flórez, Juan M.
Powiązania:
https://bibliotekanauki.pl/articles/24200525.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
goal programming
Monte Carlo simulation
process optimization
process simulation
process quality profiling
quality control modeling
Opis:
Quality profiling seeks to know the quality characteristics of products and processes to improve customer satisfaction and business competitiveness. It is required to develop new techniques and tools that upgrade and complement the traditional analysis of process variables. This article proposes a new methodology to model quality control of the process and product quality characteristics by applying optimization and simulation tools. The application in the production process of carbonated beverages allowed us to identify the most influential variables on the gas content and the degrees Brix of beverage.
Źródło:
Management and Production Engineering Review; 2023, 14, 2; 70--78
2080-8208
2082-1344
Pojawia się w:
Management and Production Engineering Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Intelligent hybrid material slide component for machine tools
Autorzy:
Möhring, H. C.
Wiederkehr, P.
Baumann, J.
König, A.
Spieker, C.
Müller, M.
Powiązania:
https://bibliotekanauki.pl/articles/100179.pdf
Data publikacji:
2017
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
process stability simulation
thermal analysis
machine tool
Opis:
In mid-scale and large five axis overhead gantry type milling machines, the vertical z-slide (ram) often constitutes one of the most sensitive and critical components regarding stiffness, structural vibrations and thermal influences. During machining, the z-slide is loaded by (quasi-) static process and drive forces, transient acceleration forces, periodic excitations by the tool engagement, as well as by thermal effects resulting from altering ambient conditions, heated chips, cooling lubricant and power losses in drives, guides and bearings. Deflections, thermal deformations and vibrations of the z-slide lead to geometric machining errors and inacceptable surface location errors at the workpieces. Furthermore, instable cutting conditions and regenerative chatter limit applicable material removal rates and, thus, productivity. In this work, a newly developed hybrid material structure for an exemplary z-slide, involving metal parts and mineral cast, is introduced. Structural optimization methods as well as process simulation techniques were applied in order to derive the final design solution. The integration of active cooling circuits for thermal stabilization is investigated and the use of fibre optical strain sensors is analysed with respect to a state monitoring of the machine tool component.
Źródło:
Journal of Machine Engineering; 2017, 17, 1; 17-30
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Technological knowledge management system for foundry industry
System zarządzania wiedzą technologiczną dla odlewnictwa
Autorzy:
Malinowski, P.
Suchy, J. S.
Jakubski, J.
Powiązania:
https://bibliotekanauki.pl/articles/352124.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
simulation process and data management system
technological knowledge base
proces symulacji i system zarządzania danymi
baza wiedzy technologicznej
Opis:
Technological knowledge is a collection of information from each stage of the casting production preparation process along with production data and quality control data. Knowledge and experience are the most important factors for the dynamic development of each foundry. Efficient archiving and management of technological knowledge, including computer simulations, is a critical part of building competitive advantage. Analysis of historical data allows for drawing the right conclusions, and guarantees improved quality of the final product. Effective enterprise management system, and technological knowledge management system in particular, is an indispensable tool for any innovative foundry. Simulation Process & Data Management is a new, dynamically-developing scientific field. Also in the foundry industry it is a very important step towards the management of casting simulation results.
Wiedza technologiczna jest to zbiór informacji pochodzących z każdego etapu przygotowania produkcji odlewniczej. Wiedza, doświadczenie są najważniejszym czynnikami dynamicznego rozwoju każdej odlewni. Umiejętne archiwizowanie i zarządzanie wiedza technologiczna, w tym symulacjami komputerowymi jest kluczowym elementem budowania przewagi konkurencyjnej. Analiza danych historycznych umożliwia wyciąganie właściwych wniosków oraz gwarantuje poprawe jakości wyrobu końcowego. Efektywny system zarządzania przedsiebiorstwem, w szczególności system zarządzania wiedzą technologiczną jest niezbędnym narzędziem każdej innowacyjnej odlewni. Simulation Process & Data Management jest nową, dynamicznie rozwijającą się dziedzina nauki. W branży odlewniczej jest to bardzo ważny krok w kierunku zarządzania wynikami symulacji dla odlewnictwa.
Źródło:
Archives of Metallurgy and Materials; 2013, 58, 3; 965-968
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Influence of Casting Velocity on Structure of Al Continuous Ingots
Autorzy:
Bartocha, D.
Wróbel, T.
Szajnar, J.
Adamczyk, W.
Jamrozik, W.
Dojka, M.
Powiązania:
https://bibliotekanauki.pl/articles/354184.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminum
primary structure
ingot
continuous casting
simulation of solidification process
Opis:
The aim of paper was determination of influence of the casting velocity in horizontal continuous casting process on solidification phenomenon and next primary structure of aluminum ingots. In the range of studies was conducted the experiment concerning continuous casting of Al ingots with diameter 30 mm at velocity from 30 to 80 mm/min. Moreover was developed adequate to the real the virtual model of cooled water continuous casting mould, which was used in simulation of solidification process of Al continuous ingot, made in ANSYS Fluent software. In result was determined the influence of casting velocity and temperature of cooling water on position of crystallization front inside the continuous casting mould. While the shape and size of grains in primary structure of Al continuous ingots were determined on the basis of metallographic macroscopic studies. On the basis of the results analysis was affirmed that increase of casting velocity strongly influences on position of crystallization front and causes increase of temperature of ingot leaving the continuous casting mould. In result the increase of casting velocity supposedly leads to decrease of temperature gradient on crystallization front what creates coarse grains in primary structure of aluminum continuous ingots and caused low usable properties i.e. suitability to plastic deformation.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 3; 1609-1613
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamic Processes Modeling in a Peristaltic Pump with a Hydraulic Drive for the Bingham Fluid
Autorzy:
Shatokhin, Vladimir M.
Ivanchuk, Yaroslav V.
Dvirna, Olha
Veselovskaya, Natalia
Jurczak, Wojciech
Powiązania:
https://bibliotekanauki.pl/articles/2201848.pdf
Data publikacji:
2022
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
peristaltic pump
dynamic process simulation
Bingham fluid
hydraulic drive
pump rotor
Opis:
At present peristaltic pumps are widely used in many branches of industry and national economy. Simplicity of construction, processability and possibility of pumping liquids with big quantity of solid particles are the main advantages while using peristaltic pumps. Therefore development of methods of rational choice of parameters at designing of peristaltic pumps is the actual problem. To develop universal mathematical models of dynamic processes in peristaltic pumps for definition of rational technical parameters. In dynamic processes we propose to use differential equations of motion in the Lagrange form, where the angle of rotation of the pump rotor is taken as a universal coordinate. Mathematical model of dynamic processes in peristaltic pump with hydraulic drive has been created on the base of differential equation. The function of resistance forces caused by gravity forces of mixture particles in the hose reel has been determined. On the basis of the non-linear model of the resistance forces to the flow of the fluid Bingham method of constructing the dependence of the pressure drop on the angular velocity of the rotor to determine the resistance forces to the flow of the fluid has been proposed. The result of dynamic processes simulation is the determination of interrelationship of technological parameters of the device functioning: the velocity of the medium and pump performance is increasing at reducing the length of the diverting hose and reducing the height of its rise; a significant influence on the average speed has plastic viscosity of the environment; a significant change in the yield strength has an insignificant impact on the speed.
Źródło:
Advances in Science and Technology. Research Journal; 2022, 16, 4; 256--269
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Coal Preparation from Geometallurgical Perspective
Wzbogacanie węgla z perspektywy geometalurgicznej
Autorzy:
Korolev, I.
Naumov, D.
Korolev, N.
Lamberg, P.
Powiązania:
https://bibliotekanauki.pl/articles/318327.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Przeróbki Kopalin
Tematy:
przeróbka węgla
geometalurgia
modelowanie
symulacja procesu
coal preparation
geometallurgy
modeling
process simulation
Opis:
Geometallurgy as a link connecting geological features of deposit with metallurgical performance of a concentrator have found broad utilization in metals mining as well as for industrial minerals and black sands mining. However, coal industry yet stays uncovered by successful applications of geometallurgical approach due to certain specifics of a commodity. Production of coal preparation plant in terms of quality and quantity can be forecasted knowing behavior of coal bearing particles in process that is controlled by petrological and mineralogical properties. Application of process mineralogical tools together with comprehensive metallurgical testwork helps to acquire essential information for a simulation of coal preparation operations. Being combined with geological, geochemical and geotechnical data available for a deposit, outcome of process simulation will form holistic geometallurgical model. Once implemented, such models will become a powerful instrument for efficient utilization of resources and proper risk management, e.g. adaptation of the process to variations in run-of-mine coal quality, “what-if” analysis of alternative production strategies, forecasting of financial results, assessment of environmental impact.
Geometalurgia jest to ogniwo łączące cechy geologiczne złoża z wydajnością zakładów metalurgicznych, geometalurgia znalazła zastosowanie w górnictwie metali i innych surowców. Najważniejsze zastosowanie geometalurgia znalazła w przemyśle węglowym. Geometalurgia pozwala przewidzieć wielkość i jakośc produkcji zakładu wzbogacania węgla wynikające z właściwości petrologicznych i mineralogicznych minerałów w złożu. Zastosowanie narzędzi geometalurgicznych do analizy danych pomaga uzyskać kluczowe informacje dla symulacji procesów wzbogacania węgla. Połączenie danych geologicznych, geochemicznych i geotechnicznych umożliwiają przeprowadzenie symulacji procesu wzbogacania na bazie opracowanych modeli. Po wdrożeniu modele staną się instrumentem efektywnego wykorzystania zasobów i właściwego zarządzania ryzykiem, dostosowanie procesu do zmian jakości węgla w trakcie eksploatacji, analiza alternatywnych strategii produkcyjnych, prognozowanie wyników finansowych, ocena oddziaływania na środowisko.
Źródło:
Inżynieria Mineralna; 2017, R. 18, nr 1, 1; 19-22
1640-4920
Pojawia się w:
Inżynieria Mineralna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative Analysis of the Production Process of a Flange-Type Product by the Hybrid and Traditional Method with the Use of Simulation Methods
Autorzy:
Terelak-Tymczyna, Agnieszka
Bachtiak-Radka, Emilia
Jardzioch, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/2067547.pdf
Data publikacji:
2022
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
machining
hybrid machining
VSM
SLM
process simulation
cost of the production
energy analysis
Opis:
In the era of Industry 4.0, the digitization of production processes is one of the important elements contributing to the reduction of uncertainty related to the implementation of new production methods. The worldwide epidemic situation and its constraints have resulted in supply chain continuity problems. These problems make enterprises look for the possibility of producing products that they need at the moment and which they cannot obtain from the market. In special cases, this may also apply to spare parts necessary to maintain the continuity of production. The main reason for research on comparing production processes is meeting the challenges related to the pandemic situation and problems in maintaining timeliness, flexibility, and continuity of the supply chain. The first stage of the research was to visualize the course of the process and determine the lead times for both production methods. For further analysis, a digital process model was used to compare the hybrid and the classical method to check the viability of the interchangeability of methods for the production process of the flange part. The interchangeability of production methods was dictated by problems related to the supply of components for the execution of orders. The article simulates the model for unit and small-lot production in batches of 10 and 100 pieces, considering such aspects as: order completion time, energy consumption of the process, production costs, taking into account the classic and hybrid methods. The conducted research was aimed at determining the profitability of the production of flange-type products by means of classical processing and hybrid and checking the interchangeability of production methods in accordance with quality requirements as well as reducing uncertainty with the implementation of new production systems in changing market conditions. The simulations show that the use of hybrid production is recommended for unit production. In the case of small-lot production, already with 10 items, production in the traditional process is 21% cheaper, and for the production of 100 items, the cost of traditional production is reduced by 33% compared to hybrid production.
Źródło:
Advances in Science and Technology. Research Journal; 2022, 16, 1; 231--242
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Steam Reforming Catalyst Geometry on the Performance of Tubular Reformer – Simulation Calculations
Autorzy:
Franczyk, E.
Gołębiowski, A.
Borowiecki, T.
Kowalik, P.
Wróbel, W.
Powiązania:
https://bibliotekanauki.pl/articles/184862.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
tubular steam reforming
nickel catalyst geometry
process simulation
catalyst coking
process intensification
symulacja procesu
katalizator koksujący
intensyfikacja
Opis:
A proper selection of steam reforming catalyst geometry has a direct effect on the efficiency and economy of hydrogen production from natural gas and is a very important technological and engineering issue in terms of process optimisation. This paper determines the influence of widely used seven-hole grain diameter (ranging from 11 to 21 mm), h/d (height/diameter) ratio of catalyst grain and Sh/St (hole surface/total cylinder surface in cross-section) ratio (ranging from 0.13 to 0.37) on the gas load of catalyst bed, gas flow resistance, maximum wall temperature and the risk of catalyst coking. Calculations were based on the one-dimensional pseudo-homogeneous model of a steam reforming tubular reactor, with catalyst parameters derived from our investigations. The process analysis shows that it is advantageous, along the whole reformer tube length, to apply catalyst forms of h/d = 1 ratio, relatively large dimensions, possibly high bed porosity and Sh/St ≈ 0.30-0.37 ratio. It enables a considerable process intensification and the processing of more natural gas at the same flow resistance, despite lower bed activity, without catalyst coking risk. Alternatively, plant pressure drop can be reduced maintaining the same gas load, which translates directly into diminishing the operating costs as a result of lowering power consumption for gas compression.
Źródło:
Chemical and Process Engineering; 2015, 36, 2; 239-250
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 125

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