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[citace_text] => Nevrlý Josef, Němec Zdeněk, Pazdera Ivo, Nožka Michal. Modelling of electric drive for excavator pump. In Engineering Mechanics 2018. Engineering Mechanics. Praha: 2018. p. 593-596. ISBN: 978-80-86246-88-8. ISSN: 1805-8248.
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The electric drive powered by electric accumulators as a single source of energy is a crucial innovation in contradiction to the traditional drive of excavator by an internal combustion engine. In our case, we have innovated the mini-excavator E19 up to 2 tons produced by the company Bobcat Doosan.
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The electric drive powered by electric accumulators as a single source of energy is a crucial innovation in contradiction to the traditional drive of excavator by an internal combustion engine. In our case, we have innovated the mini-excavator E19 up to 2 tons produced by the company Bobcat Doosan.
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[citace_text] => Nevrlý Josef, Němec Zdeněk, Pazdera Ino, Nožka Michal. Simulation of drive for electric-hydraulic excavator. In The 24th Conference on Hydraulics and Pneumatics. Prague: VŠB - Technical University of Ostrava, CMRS-CAHP, 2018. p. 3-10. ISBN: 978-80-248-4183-0.
[citace_html] => Nevrlý Josef, Němec Zdeněk, Pazdera Ino, Nožka Michal. Simulation of drive for electric-hydraulic excavator. In The 24th Conference on Hydraulics and Pneumatics. Prague: VŠB - Technical University of Ostrava, CMRS-CAHP, 2018. p. 3-10. ISBN: 978-80-248-4183-0.
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[nazev_en] => Simulation of drive for electric-hydraulic excavator
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The electric drive powered by electric accumulators as a single source of energy is a crucial innovation in contradiction to the traditional drive of excavator by an internal combustion engine. In our case, we have innovated the mini-excavator E19 up to 2 tons produced by the company Bobcat Doosan.
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[duvernost_udaju_id] => S
[popis] => The motivation for this article was an effort to create an battery electric drive of a smaller excavator of a well-known manufacturer. This research followed the solution of the kinetic energy recovery of the road roller. The aim of the excavator electrification research was to replace its internal combustion engine with an electric motor so that the innovated excavator does not burden its surroundings with gas emissions and excessive sound emissions, so that it can work in confined spaces or protected areas. The solution was carried out in a number of stages– a patent search, the structure, functions, variants of individual solutions were analyzed, the technical possibilities of individual subsystems and the whole proposed electric drive system and the entire excavator with its mechanical and hydraulic systems were analyzed. The resulting variant included an accumulator, a Bodas RC control system, an electric motor control, a frequency converter, a special electric motor, etc. 3D models of drive elements were created to deal with the installation. Simulation models of electrical and hydraulic parts of the drive were created to select the most suitable solutions, which were verified or predicted by simulations in Matlab/Simulink environment. Tests have shown that the excavator is capable of operating for at least 7 hours without recharging the battery. The knowledge gained within the project will help in the electrification of other constructions, earthmoving and other machines, specifically the wheel loader, etc. In the development of the new electric battery drive of the excavator, mathematical modeling and simulations have proved to be a valuable tool. The main achieved results of the project are a functional model of a zero-emission mini-excavator with significantly reduced noise, a proven control algorithm in the form of software and its utility model according to the application 2018-35127 adopted by the Industrial Property Office of the Czech Republic. Innovation of the solution of the excavator was awarded the Gold Medal at the International Engineering Fair in Brno in 2018.
[popis_orig] => The motivation for this article was an effort to create an battery electric drive of a smaller excavator of a well-known manufacturer. This research followed the solution of the kinetic energy recovery of the road roller. The aim of the excavator electrification research was to replace its internal combustion engine with an electric motor so that the innovated excavator does not burden its surroundings with gas emissions and excessive sound emissions, so that it can work in confined spaces or protected areas. The solution was carried out in a number of stages– a patent search, the structure, functions, variants of individual solutions were analyzed, the technical possibilities of individual subsystems and the whole proposed electric drive system and the entire excavator with its mechanical and hydraulic systems were analyzed. The resulting variant included an accumulator, a Bodas RC control system, an electric motor control, a frequency converter, a special electric motor, etc. 3D models of drive elements were created to deal with the installation. Simulation models of electrical and hydraulic parts of the drive were created to select the most suitable solutions, which were verified or predicted by simulations in Matlab/Simulink environment. Tests have shown that the excavator is capable of operating for at least 7 hours without recharging the battery. The knowledge gained within the project will help in the electrification of other constructions, earthmoving and other machines, specifically the wheel loader, etc. In the development of the new electric battery drive of the excavator, mathematical modeling and simulations have proved to be a valuable tool. The main achieved results of the project are a functional model of a zero-emission mini-excavator with significantly reduced noise, a proven control algorithm in the form of software and its utility model according to the application 2018-35127 adopted by the Industrial Property Office of the Czech Republic. Innovation of the solution of the excavator was awarded the Gold Medal at the International Engineering Fair in Brno in 2018.
[klicova_slova] => battery; electric; drive; excavator; hydraulic; innovation; modeling
[klicova_slova_orig] => battery; electric; drive; excavator; hydraulic; innovation; modeling
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[citace_text] => NEVRLÝ, J.; FICHTA, M.; JURÍK, M.; NĚMEC, Z.; KOUTNÝ, D.; VOREL, P.; PROCHÁZKA, P. Battery electric drive of excavator designed with support of computer modeling and simulation. Proceedings, 2020, vol. 58, no. 25, p. 1-18. ISSN: 2504-3900.
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[nazev_en] => Battery electric drive of excavator designed with support of computer modeling and simulation
[popis_en] => The motivation for this article was an effort to create an battery electric drive of a smaller excavator of a well-known manufacturer. This research followed the solution of the kinetic energy recovery of the road roller. The aim of the excavator electrification research was to replace its internal combustion engine with an electric motor so that the innovated excavator does not burden its surroundings with gas emissions and excessive sound emissions, so that it can work in confined spaces or protected areas. The solution was carried out in a number of stages– a patent search, the structure, functions, variants of individual solutions were analyzed, the technical possibilities of individual subsystems and the whole proposed electric drive system and the entire excavator with its mechanical and hydraulic systems were analyzed. The resulting variant included an accumulator, a Bodas RC control system, an electric motor control, a frequency converter, a special electric motor, etc. 3D models of drive elements were created to deal with the installation. Simulation models of electrical and hydraulic parts of the drive were created to select the most suitable solutions, which were verified or predicted by simulations in Matlab/Simulink environment. Tests have shown that the excavator is capable of operating for at least 7 hours without recharging the battery. The knowledge gained within the project will help in the electrification of other constructions, earthmoving and other machines, specifically the wheel loader, etc. In the development of the new electric battery drive of the excavator, mathematical modeling and simulations have proved to be a valuable tool. The main achieved results of the project are a functional model of a zero-emission mini-excavator with significantly reduced noise, a proven control algorithm in the form of software and its utility model according to the application 2018-35127 adopted by the Industrial Property Office of the Czech Republic. Innovation of the solution of the excavator was awarded the Gold Medal at the International Engineering Fair in Brno in 2018.
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[citace_text] => BRANDEJS, J.; PALOUŠEK, D.; PROKEŠ, F.; OHLÍDAL, M.: Mechanismus projektoru s variabilní čočkou. (Funkční vzorek)
[citace_html] => BRANDEJS, J.; PALOUŠEK, D.; PROKEŠ, F.; OHLÍDAL, M.: Mechanismus projektoru s variabilní čočkou. (Funkční vzorek)
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author="Jan {Brandejs} and David {Paloušek} and František {Prokeš} and Miloslav {Ohlídal}",
title="Mechanismus projektoru s variabilní čočkou",
year="2006",
note="Functioning sample"
}
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[nazev_en] => Mechanism of head-light with variable lens
[popis_en] => The new trend in automotive industry becomes an adaptation of lighting of the road to the ambient conditions and vehicle condition. Projection unit with variable lens allows to change focal distance of condenser while subject layer remains identical. Thereby the range and dispersion of light changes according to vehicle speed.
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[nazev] => Evaluation of pressure from film thickness within EHL contact with dented surfaces
[nazev_orig] => Evaluation of pressure from film thickness within EHL contact with dented surfaces
[duvernost_udaju_id] => S
[popis] => Lubricant film thickness distribution within the whole concentrated smooth or dented contact is evaluated from chromatic interferograms by thin film colorimetric interferometry. Consequently, measured film thickness is used to determine the distribution of pressure in EHL contact. EHL film thickness measurements were made using a modified version of the automatic system for the real-time evaluation of EHL film thickness. Inverse elasticity theory approach was used in order to calculate the distribution of the contact pressure from film thickness.
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[url] =>
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[citace_text] => VRBKA, M.; VAVERKA, M.; POLIŠČUK, R.; KŘUPKA, I.; HARTL, M.; URBANEC, L. Evaluation of pressure from film thickness within EHL contact with dented surfaces. In AITC-AIT 2006 5th International Conference of Tribology. Parma, Itálie: 2006. p. 1-11. ISBN: 88-902333-0-3.
[citace_html] => VRBKA, M.; VAVERKA, M.; POLIŠČUK, R.; KŘUPKA, I.; HARTL, M.; URBANEC, L. Evaluation of pressure from film thickness within EHL contact with dented surfaces. In AITC-AIT 2006 5th International Conference of Tribology. Parma, Itálie: 2006. p. 1-11. ISBN: 88-902333-0-3.
[citace_rtf] =>
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author="Martin {Vrbka} and Michal {Vaverka} and Radek {Poliščuk} and Ivan {Křupka} and Martin {Hartl} and Libor {Urbanec}",
title="Evaluation of pressure from film thickness within EHL contact with dented surfaces",
booktitle="AITC-AIT 2006 5th International Conference of Tribology",
year="2006",
pages="1--11",
address="Parma, Itálie",
isbn="88-902333-0-3"
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[nazev_en] => Evaluation of pressure from film thickness within EHL contact with dented surfaces
[popis_en] => Lubricant film thickness distribution within the whole concentrated smooth or dented contact is evaluated from chromatic interferograms by thin film colorimetric interferometry. Consequently, measured film thickness is used to determine the distribution of pressure in EHL contact. EHL film thickness measurements were made using a modified version of the automatic system for the real-time evaluation of EHL film thickness. Inverse elasticity theory approach was used in order to calculate the distribution of the contact pressure from film thickness.
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[duvernost_udaju_id] => S
[popis] => V první části příspěvku jsou analyzovány důvody spalování komunálního odpadu a jsou uvedeny důvody, prč je nutné spalovací proces automatizovat. V této části jsou rovněž specifikovány technické požadavky na automatické řízení kotle pro spalování komunálního odpadu. Je uvažován spalovenský kotel koncepce babcock se šikmým válcovým roštem.
Technická část příspěvku začíná kapitolou o rozdělení technologie do subsystémů. Roštový spalovenský kotel se svými souvisejícícmi zařízeními je dekomponován na 4 relativně samostatné technologické části. Každý subsystém tak tvoří relativně samostatnou část se svou technologií a se svým řízením.
Všechna navrhovaná řešení jsou doplněna blokovými schematy, přičemž celkem je zpracováno 5 schemat. V závěru příspěvku jsou uveeny některé poznatky z řešení dané problematiky a jsou naznačeny další úkoly, které je žádoucí zvládnout.
[popis_orig] => V první části příspěvku jsou analyzovány důvody spalování komunálního odpadu a jsou uvedeny důvody, prč je nutné spalovací proces automatizovat. V této části jsou rovněž specifikovány technické požadavky na automatické řízení kotle pro spalování komunálního odpadu. Je uvažován spalovenský kotel koncepce babcock se šikmým válcovým roštem.
Technická část příspěvku začíná kapitolou o rozdělení technologie do subsystémů. Roštový spalovenský kotel se svými souvisejícícmi zařízeními je dekomponován na 4 relativně samostatné technologické části. Každý subsystém tak tvoří relativně samostatnou část se svou technologií a se svým řízením.
Všechna navrhovaná řešení jsou doplněna blokovými schematy, přičemž celkem je zpracováno 5 schemat. V závěru příspěvku jsou uveeny některé poznatky z řešení dané problematiky a jsou naznačeny další úkoly, které je žádoucí zvládnout.
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[citace_text] => NĚMEC, Z., SKÁLA, Z. Koncepce řízení spalovenského kotle. In Control of Power & Heating Systems 2002. Zlín, Česká republika: Univerzita Tomáše Bati ve Zlíně, Fakulta technologická, 2002. 8 s.
[citace_html] => NĚMEC, Z., SKÁLA, Z. Koncepce řízení spalovenského kotle. In Control of Power & Heating Systems 2002. Zlín, Česká republika: Univerzita Tomáše Bati ve Zlíně, Fakulta technologická, 2002. 8 s.
[citace_rtf] =>
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author="Zdeněk {Němec} and Zdeněk {Skála}",
title="Koncepce řízení spalovenského kotle",
booktitle="Control of Power & Heating Systems 2002",
year="2002",
pages="8",
publisher="Univerzita Tomáše Bati ve Zlíně, Fakulta technologická",
address="Zlín, Česká republika"
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[nazev_en] => Control Structure of Waste Incineration Boiler
[popis_en] => In the first part of the paper are presented causes for municipal solid waste burning and why it is necessary to automative it. There are also specified requirements of automatic control for burning of municipal solid waste. It is considered Babcock boiler type with sloping cylinder grate.
Paper dealing with this is divided to subsystems. Incineration boiler consists of four relative separate technology parts. Each subsystem has own technology equipment.
All proposed solutions contain detail process scheme and control loops. In closing part of the paper are described next tasks that are necessary providing to complete project.
[klicova_slova_en] => waste incineration, waste feeding, primary air, secondary air, cylinder speed
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[nazev] => Optimization of Quality of Continuously Cast Steel Slabs by Using Firefly Algorithm
[nazev_orig] => Optimization of Quality of Continuously Cast Steel Slabs by Using Firefly Algorithm
[duvernost_udaju_id] => S
[popis] => An ambition to increase both the productivity and the final product quality, in continuous casting process, led us to study new effective mathematical approaches. The quality of steel produced by continuous casting process is influenced by number of controlled factors as a casting speed or cooling rates. Appropriate setting of these factors is usually done by expert estimates and expensive experimental runs. This paper describes an algorithm for obtaining black-box type solution which maintains high production rate and high quality of products as well. The core of the algorithm is our original numerical model of 2D temperature field designed for real caster geometry. This mathematical model contains Fourier-Kirchhoff equation, including boundary conditions. The presence of phase and structural changes is modeled by an enthalpy computed from chemical composition of steel. The optimization part is performed by recently created heuristic method, so-called Firefly algorithm, where the principles of searching for optimal values are inspired by biological behavior of fireflies. By combining the numerical model and heuristic optimization we are able to set the controlled values and to obtain high quality steel which satisfies constrains for prescribed metallurgical length, core and surface temperatures. This approach can be easily utilized for arbitrary class of steel only by changing chemical composition in the numerical model. The results of simulations can be validated by real historical data in purpose to reach relationship between temperature field and final product quality.
[popis_orig] => An ambition to increase both the productivity and the final product quality, in continuous casting process, led us to study new effective mathematical approaches. The quality of steel produced by continuous casting process is influenced by number of controlled factors as a casting speed or cooling rates. Appropriate setting of these factors is usually done by expert estimates and expensive experimental runs. This paper describes an algorithm for obtaining black-box type solution which maintains high production rate and high quality of products as well. The core of the algorithm is our original numerical model of 2D temperature field designed for real caster geometry. This mathematical model contains Fourier-Kirchhoff equation, including boundary conditions. The presence of phase and structural changes is modeled by an enthalpy computed from chemical composition of steel. The optimization part is performed by recently created heuristic method, so-called Firefly algorithm, where the principles of searching for optimal values are inspired by biological behavior of fireflies. By combining the numerical model and heuristic optimization we are able to set the controlled values and to obtain high quality steel which satisfies constrains for prescribed metallurgical length, core and surface temperatures. This approach can be easily utilized for arbitrary class of steel only by changing chemical composition in the numerical model. The results of simulations can be validated by real historical data in purpose to reach relationship between temperature field and final product quality.
[klicova_slova] => Firefly algorithm, Temperature field, Enthalpy approach, Continuous casting
[klicova_slova_orig] => Firefly algorithm, Temperature field, Enthalpy approach, Continuous casting
[url] =>
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[identifikator_popis] => ISBN - Program and books of abstracts of the 18 th Conference on Materials and Technology
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[citace_text] => MAUDER, T.; ŠANDERA, Č.; ŠTĚTINA, J.; ŠEDA, M. Optimization of Quality of Continuously Cast Steel Slabs by Using Firefly Algorithm. In Program and books of abstracts of the 18 th Conference on Materials and Technology. Ljubljana, Slovenia: Institute of Materials and Technology, 2010. p. 45-46. ISBN: 978-961-92518-2-9.
[citace_html] => MAUDER, T.; ŠANDERA, Č.; ŠTĚTINA, J.; ŠEDA, M. Optimization of Quality of Continuously Cast Steel Slabs by Using Firefly Algorithm. In Program and books of abstracts of the 18 th Conference on Materials and Technology. Ljubljana, Slovenia: Institute of Materials and Technology, 2010. p. 45-46. ISBN: 978-961-92518-2-9.
[citace_rtf] =>
[citace_bibtex] => @inproceedings{BUT34872,
author="Tomáš {Mauder} and Čeněk {Šandera} and Josef {Štětina} and Miloš {Šeda}",
title="Optimization of Quality of Continuously Cast Steel Slabs by Using Firefly Algorithm",
booktitle="Program and books of abstracts of the 18 th Conference on Materials and Technology",
year="2010",
pages="45--46",
publisher="Institute of Materials and Technology",
address="Ljubljana, Slovenia",
isbn="978-961-92518-2-9"
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[poznamka_metriky] =>
[nazev_en] => Optimization of Quality of Continuously Cast Steel Slabs by Using Firefly Algorithm
[popis_en] => An ambition to increase both the productivity and the final product quality, in continuous casting process, led us to study new effective mathematical approaches. The quality of steel produced by continuous casting process is influenced by number of controlled factors as a casting speed or cooling rates. Appropriate setting of these factors is usually done by expert estimates and expensive experimental runs. This paper describes an algorithm for obtaining black-box type solution which maintains high production rate and high quality of products as well. The core of the algorithm is our original numerical model of 2D temperature field designed for real caster geometry. This mathematical model contains Fourier-Kirchhoff equation, including boundary conditions. The presence of phase and structural changes is modeled by an enthalpy computed from chemical composition of steel. The optimization part is performed by recently created heuristic method, so-called Firefly algorithm, where the principles of searching for optimal values are inspired by biological behavior of fireflies. By combining the numerical model and heuristic optimization we are able to set the controlled values and to obtain high quality steel which satisfies constrains for prescribed metallurgical length, core and surface temperatures. This approach can be easily utilized for arbitrary class of steel only by changing chemical composition in the numerical model. The results of simulations can be validated by real historical data in purpose to reach relationship between temperature field and final product quality.
[klicova_slova_en] => Firefly algorithm, Temperature field, Enthalpy approach, Continuous casting
[vysledek_datum] => 2010-11-15T00:00:00+01:00
)
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(
[vysledek_id] => 46156
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[nazev] => Zlepšení regulace napájecí vody bubnového kotle – příklad řešení
[nazev_orig] => Zlepšení regulace napájecí vody bubnového kotle – příklad řešení
[duvernost_udaju_id] => S
[popis] => Příspěvek ukazuje příklad řešení regulace napájecí vody bubnového kotle. Problém je obecněji analyzován a řešení je teoreticky zdůvodněno, protože se jedná o regulovanou soustavu s neminimální fází a tudíž obtížně regulovatelnou. Jsou uvedeny modely dané konkrétní regulované soustavy a jsou popsány navržené úpravy dřívější regulace. Přínosy úprav regulace jsou demonstrovány porovnáním původní a upravené regulace.
[popis_orig] => Příspěvek ukazuje příklad řešení regulace napájecí vody bubnového kotle. Problém je obecněji analyzován a řešení je teoreticky zdůvodněno, protože se jedná o regulovanou soustavu s neminimální fází a tudíž obtížně regulovatelnou. Jsou uvedeny modely dané konkrétní regulované soustavy a jsou popsány navržené úpravy dřívější regulace. Přínosy úprav regulace jsou demonstrovány porovnáním původní a upravené regulace.
[klicova_slova] =>
[klicova_slova_orig] =>
[url] =>
[oecd_obor_id] => 20704
[odpovedny_utvar_id] => 174
[odpovedny_utvar_nazev] => Energy Institute
[odpovedny_utvar_zkratka] => EI
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[nadrazena_soucast_zkratka] => FME
[nadrazena_soucast_nazev] => Faculty of Mechanical Engineering
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[vycet_osob] => NĚMEC, Z., SKÁLA, Z.
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[korespondencni_autor] =>
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[znamka] =>
[kategorie_nazev] => Publication results
[druh_nazev] => Peer-reviewed article not indexed in WoS or Scopus
[druh_popis] => Other original article or review in a peer-reviewed scientific periodical not included in WoS or Scopus
[stav] => Approved
[vysledek_kategorie_id] => PV
[vysledek_system_kategorie_id] => PU
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[upravil] => Informační systém Automat
[ins_uid] => 999999
[upd_uid] => 999999
[ins_ts] => 2025-09-22
[upd_ts] => 2025-09-22
[status] => 9
[identifikator] => ISSN 0375-8842
[identifikator_popis] => ISSN - Energetika (CZ)
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[citace_text] => NĚMEC, Z., SKÁLA, Z. Zlepšení regulace napájecí vody bubnového kotle – příklad řešení. Energetika, 2005, roč. 55, č. 5, 4 s. ISSN: 0375-8842.
[citace_html] => NĚMEC, Z., SKÁLA, Z. Zlepšení regulace napájecí vody bubnového kotle – příklad řešení. Energetika, 2005, roč. 55, č. 5, 4 s. ISSN: 0375-8842.
[citace_rtf] =>
[citace_bibtex] => @article{BUT46156,
author="Zdeněk {Němec} and Zdeněk {Skála} and Milan {Koňařík}",
title="Zlepšení regulace napájecí vody bubnového kotle – příklad řešení",
journal="Energetika",
year="2005",
volume="55",
number="5",
pages="4",
issn="0375-8842"
}
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[poznamka_metriky] =>
[nazev_en] => Control Improvement of Shell Boiler Feedwater - Solved Example
[popis_en] => In the contribution is demonstrated the solution of drum boiler feeding water regulation. The problem is analysed generally and the solution is justified theoretically because it is a regulated system with nopn-minimal phase and so it is regulated difficultly. There are given models of the particular regulated system and some designed modifications of stansard regulation are described. The contributions of control modifications are demonstrated by comparison original with modified regulation.
[klicova_slova_en] => Drum boiler, feeding water regulation, system with non-minimal phase, waste combusion operation
[vysledek_datum] => 2005-05-05T00:00:00+02:00
)
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(
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[nazev] => Applying interferometry in researching convection heat transfer from panel radiators
[nazev_orig] => Applying interferometry in researching convection heat transfer from panel radiators
[duvernost_udaju_id] => S
[popis] => This article is concerned with interferometric research into temperature fields and heat transfer via laminar natural convection of a reduced model of panel radiators with the help of a Mach-Zehnder interferometer. Heat transfer is determined by the temperature derivative at the surface of the radiator walls evaluated by means of an interferometrically measured temperature field. This article deals with problems involved in applying the results of the measurement to an actual radiator and problems in determining the temperature derivative at higher wall surface temperatures, necessary to simulate heat transfer in an actual radiator. High surface temperatures complicate the evaluation of interferograms. A method for evaluating the temperature derivative in the case of higher wall temperatures is worked out in the article, based upon measuring the thickness of thermal boundary layers. The interferograms acquired are evaluated by computer with the use of specially developed software. The outcome of the research consists in relationships for the calculation of Nusselt numbers across the face of the panel radiator as well as in the slots between walls of double or triple panel radiators and suggestions for the optimal configuration of panel radiators to ensure maximal heat output.
[popis_orig] => This article is concerned with interferometric research into temperature fields and heat transfer via laminar natural convection of a reduced model of panel radiators with the help of a Mach-Zehnder interferometer. Heat transfer is determined by the temperature derivative at the surface of the radiator walls evaluated by means of an interferometrically measured temperature field. This article deals with problems involved in applying the results of the measurement to an actual radiator and problems in determining the temperature derivative at higher wall surface temperatures, necessary to simulate heat transfer in an actual radiator. High surface temperatures complicate the evaluation of interferograms. A method for evaluating the temperature derivative in the case of higher wall temperatures is worked out in the article, based upon measuring the thickness of thermal boundary layers. The interferograms acquired are evaluated by computer with the use of specially developed software. The outcome of the research consists in relationships for the calculation of Nusselt numbers across the face of the panel radiator as well as in the slots between walls of double or triple panel radiators and suggestions for the optimal configuration of panel radiators to ensure maximal heat output.
[klicova_slova] => Mach-Zehnder interferometer; Heating; Similarity theory; Interferogram evaluation; Optimal arrangement
[klicova_slova_orig] => Mach-Zehnder interferometer; Heating; Similarity theory; Interferogram evaluation; Optimal arrangement
[url] =>
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[vycet_osob] => PAVELEK, M.; JANOTKOVÁ, E.; PAVELEK, T.
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[upd_ts] => 2025-09-22
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[identifikator] => ISSN 1065-3090
[identifikator_popis] => ISSN - JOURNAL OF FLOW VISUALIZATION AND IMAGE PROCESSING (US)
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[citace_text] => PAVELEK, M.; JANOTKOVÁ, E.; PAVELEK, T. Applying interferometry in researching convection heat transfer from panel radiators. JOURNAL OF FLOW VISUALIZATION AND IMAGE PROCESSING, 2009, vol. 16, no. 2, p. 159-181. ISSN: 1065-3090.
[citace_html] => PAVELEK, M.; JANOTKOVÁ, E.; PAVELEK, T. Applying interferometry in researching convection heat transfer from panel radiators. JOURNAL OF FLOW VISUALIZATION AND IMAGE PROCESSING, 2009, vol. 16, no. 2, p. 159-181. ISSN: 1065-3090.
[citace_rtf] =>
[citace_bibtex] => @article{BUT47646,
author="Milan {Pavelek} and Eva {Janotková} and Tomáš {Pavelek}",
title="Applying interferometry in researching convection heat transfer from panel radiators",
journal="JOURNAL OF FLOW VISUALIZATION AND IMAGE PROCESSING",
year="2009",
volume="16",
number="2",
pages="159--181",
issn="1065-3090"
}
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[nazev_en] => Applying interferometry in researching convection heat transfer from panel radiators
[popis_en] => This article is concerned with interferometric research into temperature fields and heat transfer via laminar natural convection of a reduced model of panel radiators with the help of a Mach-Zehnder interferometer. Heat transfer is determined by the temperature derivative at the surface of the radiator walls evaluated by means of an interferometrically measured temperature field. This article deals with problems involved in applying the results of the measurement to an actual radiator and problems in determining the temperature derivative at higher wall surface temperatures, necessary to simulate heat transfer in an actual radiator. High surface temperatures complicate the evaluation of interferograms. A method for evaluating the temperature derivative in the case of higher wall temperatures is worked out in the article, based upon measuring the thickness of thermal boundary layers. The interferograms acquired are evaluated by computer with the use of specially developed software. The outcome of the research consists in relationships for the calculation of Nusselt numbers across the face of the panel radiator as well as in the slots between walls of double or triple panel radiators and suggestions for the optimal configuration of panel radiators to ensure maximal heat output.
[klicova_slova_en] => Mach-Zehnder interferometer; Heating; Similarity theory; Interferogram evaluation; Optimal arrangement
[vysledek_datum] => 2009-10-01T00:00:00+02:00
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[nazev_orig] => Vytápěcí systémy a klimatizace
[duvernost_udaju_id] => S
[popis] => V publikaci jsou uvedeny nejnovější poznatky z oblasti komponent a systémů pro vytápění a klimatizaci, včetně používané měřicí a regulační techniky a automatického řízení. Publikace zahrnuje i nejnovější poznatky a přístupy používané při řešení problematiky v dané oblasti.
[popis_orig] => V publikaci jsou uvedeny nejnovější poznatky z oblasti komponent a systémů pro vytápění a klimatizaci, včetně používané měřicí a regulační techniky a automatického řízení. Publikace zahrnuje i nejnovější poznatky a přístupy používané při řešení problematiky v dané oblasti.
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[citace_text] => JANOTKOVÁ, E.; PAVELEK, M.; HEJČÍK, J. Vytápěcí systémy a klimatizace. Brno: FSI VUT v Brně, 2006. s. 1-93.
[citace_html] => JANOTKOVÁ, E.; PAVELEK, M.; HEJČÍK, J. Vytápěcí systémy a klimatizace. Brno: FSI VUT v Brně, 2006. s. 1-93.
[citace_rtf] =>
[citace_bibtex] => @misc{BUT66863,
author="Eva {Janotková} and Milan {Pavelek} and Jiří {Hejčík} and Ladislav {Ochrana} and Jan {Fiedler} and Jiří {Pospíšil} and František {Vdoleček} and Zdeněk {Němec}",
title="Vytápěcí systémy a klimatizace",
year="2006",
pages="1--93",
publisher="FSI VUT v Brně",
address="Brno"
}
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[oecd_tree_podobor_nazev] => Thermodynamics
[poznamka_metriky] =>
[nazev_en] => Heating systems and air-conditioning
[popis_en] => The publication delivers latest findings and knowledge in the area of the heating and air-conditioning systems and components, including measuring and control systems and automatic control systems. The newest knowledge and approaches used for problem solving in these fields are also included.
[klicova_slova_en] => Thermodynamics, heating, air-conditioning, boilers, heat pumps
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[popis] => An ambition to increase both the productivity and the final product quality, in continuous casting process, led us to study new effective mathematical approaches. The quality of steel produced by continuous casting process is influenced by number of controlled factors as a casting speed or cooling rates. Appropriate setting of these factors is usually done by expert estimates and expensive experimental runs. This paper describes an algorithm for obtaining black-box type solution which maintains high production rate and high quality of products as well. The core of the algorithm is our original numerical model of 2D temperature field designed for real caster geometry. This mathematical model contains Fourier-Kirchhoff equation, including boundary conditions. The presence of phase and structural changes is modeled by an enthalpy computed from chemical composition of steel. The optimization part is performed by recently created heuristic method, so-called Firefly algorithm, where the principles of searching for optimal values are inspired by biological behavior of fireflies. By combining the numerical model and heuristic optimization we are able to set the controlled values and to obtain high quality steel which satisfies constrains for prescribed metallurgical length, core and surface temperatures. This approach can be easily utilized for arbitrary class of steel only by changing chemical composition in the numerical model. The results of simulations can be validated by real historical data in purpose to reach relationship between temperature field and final product quality.
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author="Tomáš {Mauder} and Čeněk {Šandera} and Josef {Štětina} and Miloš {Šeda}",
title="Optimization of Quality of Continuously Cast Steel Slabs by Using Firefly Algorithm",
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