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Tytuł:
Comparison analysis of selected nuclear power plants supplied with helium from high-temperature gas-cooled reactor
Autorzy:
Szewczuk-Krypa, N.
Drosińska-Komor, M.
Głuch, J.
Breńkacz, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/258918.pdf
Data publikacji:
2018
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
HTGR
nuclear power plants
floating marine plants
nuclear power
Opis:
The article presents results of efficiency calculations for two 560 MW nuclear cycles with high-temperature gas-cooled reactor (HTGR). An assumption was made that systems of this type can be used in so-called marine nuclear power plants. The first analysed system is the nuclear steam power plant. For the steam cycle, the efficiency calculations were performed with the code DIAGAR, which is dedicated for analysing this type of systems. The other system is the power plant with gas turbine, in which the combustion chamber has been replaced with the HTGR. For this system, a number of calculations were also performed to assess its efficiency. Moreover, the article names factors in favour of floating nuclear power plants with HTGRs, which, due to passive safety systems, are exposed to much smaller risk of breakdown than other types of reactors which were in common use in the past. Along with safety aspects, it is also economic and social aspect which make the use of this type of systems advisable.
Źródło:
Polish Maritime Research; 2018, S 1; 204-210
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stair-like multivariable generalized predictive control of pulverizing system in thermal power plants
Autorzy:
Zhang, Jiansheng
Zhang, Gang
Gao, Yaokui
Hu, Yong
Powiązania:
https://bibliotekanauki.pl/articles/136266.pdf
Data publikacji:
2019
Wydawca:
EEEIC International Barbara Leonowicz Szabłowska
Tematy:
power plants
predictive Control
pulverization process
Opis:
Pulverizing system is an important part in the clean and efficient utilization of coal in thermal power plant, and the optimal control of the system is an important way to achieve this goal. This paper presents a stair-like multivariable generalized predictive control scheme for a pulverizing system. This control scheme focuses on the problem of predictive control algorithm in practical application, and integrates the feedforward experience in traditional control schemes of pulverizing system. Simulation results showed that the scheme are able to realize the decoupling control of the pulverizing system, avoid the problem of matrix inversion, reduce the amount of calculation, and has certain engineering application value.
Źródło:
Transactions on Environment and Electrical Engineering; 2019, 3, 1; 21-25
2450-5730
Pojawia się w:
Transactions on Environment and Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
O sposobah utilizacii tepla na ekspluatacionnyh rezimah cydovyh i stacionarnyh energeticeskih ustanovok
Heat Utilization Methods for the Operation of Marine and Industrial Power Plants
Autorzy:
Kantalinskij, V.
Patrakeeva, E.
Powiązania:
https://bibliotekanauki.pl/articles/359871.pdf
Data publikacji:
2004
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
EXPLO-SHIP 2004
marine power plants
industrial power plants
heat utilization
saved heat exchanger
condensation exchanger
Opis:
The article discusses the results of using waste gas heat from heat power plant boilers. The authors suggest working out rational schemes adaptation for heat-surfaces staying in boiler's air-gas path. There is showed principle possibility of condensation and low-temperature save heat exchangers use on ship power plants.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2004, 1 (73); 279-289
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of dredger power plant type and dredger size on output of power plant installed on trailing suction hopper dredger
Autorzy:
Bocheński, D.
Powiązania:
https://bibliotekanauki.pl/articles/2073663.pdf
Data publikacji:
2015
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
trailing suction hopper dredgers
ship power plants
Opis:
This paper presents results of investigations dealing with influence of parameters characterizing size of trailing suction hopper dredger as well as type of power system on magnitude of total output of combustion engines installed in dredger power plant.
Źródło:
Journal of Polish CIMEEAC; 2015, 10, 1; 17--21
1231-3998
Pojawia się w:
Journal of Polish CIMEEAC
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Energy - time method for assessment of main diesel engine operation
Autorzy:
Rudnicki, J.
Powiązania:
https://bibliotekanauki.pl/articles/246378.pdf
Data publikacji:
2007
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
ship power plants
diesel engine performance
reliability
Opis:
This paper presents a development of the known qualitative method for assessment of engine operation, applied to ship main diesel engine as an example. According to this interpretation engine operation can be presented as a physical quantity. In this aspect, based on the selected functional system of the engine, was assessed usefulness of the quantity for description reliability features of the system. To the analysis was applied Poisson's uniform process which made it possible to elaborate a model of run of worsening the considered system's operation taken as a random process of identical independent decreases of energy efficiency within a given time interval. The presented method is a valuable supplement for description reliability features of ship main engine what is important for realization of shipping tasks by sea. Additional advantage is versatility which makes that it can be applied to reliability analysis of any ship device or ship energy subsystem. Classification of the engine serviceability states with taking into account the assessment of its operation in energy-time aspect, schematic diagram of lubricating system of RTA48-TB engine and values of lubricating oil parameters in steady conditions for the engine load, graphical presentation of lubricating oil cooler operation graphical interpretation of the decreasing of oil cooler efficiency are presented in the paper
Źródło:
Journal of KONES; 2007, 14, 3; 519-526
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Corrosion mechanisms and their consequences for nuclear power Plants
Autorzy:
Berg, H.-P.
Powiązania:
https://bibliotekanauki.pl/articles/2069694.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
corrosion
corrosion types
operating experience
nuclear power plants
Opis:
It is well known that operational conditions in light water reactors strongly influence the corrosion processes. This paper gives an overview which types of corrosion are identified in operating practice based on the evaluation of events which are reported to the authorities in line with the German reporting criteria. It has been found that the main contributor is the stress corrosion cracking. Several examples of different corrosion mechanisms and their consequences are provided for PWR although a high standard of quality of structures, systems and components has been achieved. Recommendations have been given to check the plant specifications concerning the use of auxiliary materials or fluids during maintenance as well as to examine visually the outer surfaces of austenitic piping with regard to residua of adhesive or adhesive tapes within the framework of in-service inspections. However, events in the last two years shows that such problems cannot be totally avoided.
Źródło:
Journal of Polish Safety and Reliability Association; 2009, 1; 23--32
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Izolacja termiczna w zespołach napędowych rakiet po długoletnim składowaniu
Thermal isolation in rocket motor units after long term storing
Autorzy:
Studencki, M.
Powiązania:
https://bibliotekanauki.pl/articles/235543.pdf
Data publikacji:
2008
Wydawca:
Wojskowy Instytut Techniczny Uzbrojenia
Tematy:
izolacja termiczna
zespoły napędowe
thermal insulation
power plants
Opis:
W artykule omówiono celowość stosowania izolacji termicznej w zespołach napędowych rakiet na paliwo stałe. Na podstawie własnych badań, przedstawiono budowę i technologię wykonania warstwy termoizolacyjnej w zespołach napędowych rakiet przeciwlotniczych „OSA”. W formie dokumentacji fotograficznej, zaprezentowano jedną z metod oceny stanu technicznego tej warstwy z wykorzystaniem aparatury endoskopowej. Przedstawiono wyniki badań własnych mających na celu ustalenie przyczyn spalenia powłoki lakierniczej na zewnętrznej powierzchni zespołu napędowego rakiety „OSA”. Wskazano na konieczność chronienia powierzchni komory spalania przed mechanicznymi uderzeniami i większymi statycznymi naciskami z zewnątrz.
The expediency of using thermal isolation in rocket solid propellant motor units is presented in the paper. The design and technology for getting a thermo-isolating layer in motor units of antiaircraft missiles OSA is provided on the base of own research work. Technical evaluation of this layer was carried out by the endoscopic instrument and some results presented in the pictures included. Some results of own research work are presented to show the reasons for burning the paint coating on the external surface of OSA motor. It was pointed that there is an expediency to protect the surface of the burning chamber against mechanical hits and greater static stresses from outside.
Źródło:
Problemy Techniki Uzbrojenia; 2008, R. 37, z. 106; 75-88
1230-3801
Pojawia się w:
Problemy Techniki Uzbrojenia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cause and effect factors of refrigeration system faults in fishing vessels
Autorzy:
Kostrzewa, W.
Behrendt, C.
Powiązania:
https://bibliotekanauki.pl/articles/359022.pdf
Data publikacji:
2012
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
refrigeration systems
marine power plants
fault
Ishikawa diagram
Opis:
Growing environmental protection requirements also include problems of ozone depletion by coolants. This article presents a possibility of using a cause-and-effect diagram, known as Ishikawa diagram, for an analysis of faults occurring in marine refrigeration systems. The analysis, focused on refrigeration systems installed in Polish fishing vessels, makes use of extensive faults data collected during research.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2012, 32 (104) z. 2; 94-97
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new procedure of the seating of combustion engine at the marine power plant
Autorzy:
Piaseczny, L.
Powiązania:
https://bibliotekanauki.pl/articles/243923.pdf
Data publikacji:
2008
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
marine power plants
combustion engine
seating
polymer composition
Opis:
There has been presented a new procedure of the seating of a combustion engines at the marine power plant with steel chocks cemented by a thixotropic polymer composition between the engine's spot footing and the foundation ledge. A combustion engine is seated on foundation at the marine power plant by steel chocks or the chocks that are cast from polymer composition at the marine power plant. The arrangement, number and dimensions of foundation chocks, as well as arrangement, number and dimensions of the lateral and frontal stoppers that secure chocks work, are established by an engine manufacturer and are approved by Classification Society that supervises the vessel's construction and operation. The author's intention was to develop such chocks that combine the good resistance of steel chocks with the easiness of adjustment the bearing surfaces of polymer compositions chocks. Combination of these features was obtained for steel chocks which are glued by the relatively thin layers of polymer compositions between the engine spot footing and the foundation ledges. Such a method of making the chocks and seating with them the engines on foundation was claimed with the Patent RP No. 192120 on 24th July 2000 for the Polish Naval Academy. In order to receive the approval of the Polish Register of Shipping to use new chocks at the marine power plants, the author carried out appropriate research, results of which are presented below. The results obtained in the research show that by seating of a combustion engine with these steel-thixotropic polymer chocks at the marine power plant, the foundation bolts tension can be diminished to the value equal to five times of the engine weight.
Źródło:
Journal of KONES; 2008, 15, 2; 365-369
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Diagnozowanie operatorów siłowni okrętowych
Diagnosis of operator of marine power plants
Autorzy:
Monieta, J.
Powiązania:
https://bibliotekanauki.pl/articles/327794.pdf
Data publikacji:
2006
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
siłownia okrętowa
operator
diagnozowanie
marine power plants
diagnosis
Opis:
Praca zawiera wyniki badań zdarzeń niepożądanych operatorów siłowni okrętowych podczas pracy na statkach morskich. Zdarzeniami tymi były wypadki przy pracy załóg maszynowych. W pracy również zamieszczono wyniki diagnozowania kandydatów na operatorów siłowni okrętowych, tuż przed ich półroczną praktyką pływającą. Wyniki diagnozowania operatorów świadczą o nienajlepszych ich predyspozycjach.
The work is contained results of investigations of undesirable events of operators of the during work on the seagoing vessels. These events were injuries at work of engine crew. I work have been placed results of diagnosis of candidate on operators of marine power plants also, before their half-year practices just floating. Results of diagnosing of operators show them unfairness predispositions.
Źródło:
Diagnostyka; 2006, 4(40); 173-178
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigating the Efficiency of Combined Cycle Power Plants with the Data Envelopment Analysis Process (with an Emphasis on Air Pollution)
Autorzy:
Sanjaranipour, Noushin
Atabi, Farideh
Momeni, Mansour
Ghodousi, Jamal
Lahijanian, Akramolmolok
Powiązania:
https://bibliotekanauki.pl/articles/2055783.pdf
Data publikacji:
2022
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
efficiency
Combined Cycle Power Plants
DEA
air pollution
Opis:
Performance management is one of the most significant strategies in promoting the efficiency of organizations and is highly sensitive. It is important to check the efficiency of combined cycle power plants because of their major contribution to power generation and air pollution. This study was conducted to evaluate the economic and environmental efficiency of Combined Cycle Power Plants (CCPPs). The inputs and outputs required to evaluate the performance of the power plants were determined according to expert opinions. Then, the 7-year statistics and information of the Qom, Neishabour, Shahid Rajaee, Yazd and Kerman power plants were collected as the desired CCPPs in Iran. The Window Data Envelopment Analysis (WDEA) method was used for evaluating the efficiency of the power plants. The 3-year window length showed that most of the power plants were efficient. Only the Rajaee, Neishabour and Yazd power plants were ineffective in some years. The mean efficiency of the power plants in the 4-year window length showed that the plants were efficient from 2008 to 2010.
Źródło:
Geomatics and Environmental Engineering; 2022, 16, 2; 111--125
1898-1135
Pojawia się w:
Geomatics and Environmental Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Gas Formation Reactions in the Raw Mixture Based on TPP Ash
Autorzy:
Koshlak, Hanna
Powiązania:
https://bibliotekanauki.pl/articles/2069926.pdf
Data publikacji:
2021
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
swelling
porous structure
ash of thermal power plants
Opis:
The article discusses the physicochemical mechanisms of the effect of chemical reagents on the processes of swelling of the raw mixture based on the ash of thermal power plants. The process of structure formation in such mixtures occurs as a result of physicochemical transformations of its constituent components. To intensify gas evolution and obtain materials of a porous structure, the presence of a gas former is necessary. The author has analysed the possibility of creating a porous structure in a raw mixture based on ash with the introduction of various gas formers or their formation as a result of exchange reactions. The main chemical compounds contributing to pore formation have been determined. To form a given structure, it is proposed to control chemical transformations at the stage of swelling. To study the processes of intensification of gas evolution, the author proposes to investigate the mechanisms of the influence of mineral fillers and chemical reagents on swelling processes based on the analysis of the Gibbs equation. The parameters of the Gibbs equation are obtained, by which it is possible to determine the probability of the occurrence of chemical reactions with the proposed chemical agents for the formation of gas bubbles with (pores) in the raw material.
Źródło:
Rocznik Ochrona Środowiska; 2021, 23; 106--116
1506-218X
Pojawia się w:
Rocznik Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Some problems with operation of engines fuelled with landfill biogas
Autorzy:
Ziółkowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/246187.pdf
Data publikacji:
2010
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
power plants
internal combustion engines
gas engines
landfill biogas
Opis:
In the article has been described some problems associated with the production of biogas and using it as a fuel in internal combustion engines. In Poland biogas is mostly generated from deposits from sewage treatment plants, agricultural waste and from landfills. The biogas chemical composition depends on the organie matter as a source of biogas on used fermentation technology. One of the forms of biogas utilization is burning it in internal combustion engines. Engines producers offer a range of models designed to be fuelled with biogas. However there are some signiflcant problems with operation of such engines that appear in the case of using landfill biogas as a fuel. This kind of biogas is characterized by considerable variability in methane content, which dynamically changes throughout the period of landfill usage. In the article there is some information about the impact of changes in the methane content on operation of internal combustion engines fuelled with landfill biogas. Rapid increase in the methane content may be the purpose of knocking and engine damage. There also presented the analysis of control systems applied in gas engines. The analysis is made for purpose of determining the ability of described control systems to maintain with rapid changes in methane content in fuel gas. On the basis of this there are described some requests for features that should be characterized by the gas engine control system adapted to the combustion of landfill biogas. In summary are presented some guidance to facilitate the correct selection of engine fuelled with landfill biogas.
Źródło:
Journal of KONES; 2010, 17, 4; 615-622
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Elektrownie jądrowe w warunkach awarii katastrofalnej
Autorzy:
Grządzielski, I.
Sroka, K.
Powiązania:
https://bibliotekanauki.pl/articles/397401.pdf
Data publikacji:
2011
Wydawca:
ENERGA
Tematy:
elektrownie jądrowe
awaria
katastrofa
nuclear power plants
breakdown
disaster
Opis:
W artykule podjęto próbę wstępnej oceny pracy elektrowni jądrowych w warunkach awarii katastrofalnej. Analizę tę przeprowadzono, wykorzystując doświadczenia z przebytych awarii katastrofalnych w krajach ze znaczącą generacją z elektrowni jądrowych. Na bazie tych doświadczeń podjęto próbę zdefiniowania charakterystycznych cech elektrowni jądrowych i sformułowania wymagań, jakie muszą spełniać te elektrownie w systemie elektroenergetycznym w kontekście możliwości wystąpienia blackoutu.
Źródło:
Acta Energetica; 2011, 1; 5-10
2300-3022
Pojawia się w:
Acta Energetica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Site selection for solar power plant in Zaporizhia city (Ukraine)
Autorzy:
Yankiv-Vitkovska, Liubov
Peresunko, Bohdan
Wyczałek, Ireneusz
Papis, Joanna
Powiązania:
https://bibliotekanauki.pl/articles/145422.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
elektrownia
analiza wielokryterialna
AHP
power plants
multicriteria analysis
QGIS
Opis:
Renewable energy from solar power plants is becoming more and more popular due to the depletion of raw materials and reduction of dependence on oil and gas and is also harmless to the natural environment. The management and rational use of land resources is currently a pressing problem in the world, including in Ukraine. One of the solutions is the development of technologies for the use of these areas and the establishment of environmentally friendly technologies for reducing air pollution, namely electricity facilities – solar power plants based on the use of photovoltaic panels. Choosing the right location for obtaining solar energy depends on many factors and constraints. Optimal location of solar farms is important to maximize the beneficial features of projects while minimizing the negative. A method of finding places in the vicinity of large cities that could be suitable for installing power plants was developed. The proposed method uses an analytical hierarchical process, analytical network process, Boolean logic and weighted linear combination. It has been implemented in the QGIS program. The method was successfully used for the city of Zaporizhia, but it can be directly implemented in any other region. That is why the presented works constitute a scheme that can be easily used to estimate large areas in order to optimally choose a place for a solar park in the vicinity of large cities. Such a model can be very useful for investors to find potential locations for solar energy before conducting detailed field research.
Źródło:
Geodesy and Cartography; 2020, 69, 1; 97-116
2080-6736
2300-2581
Pojawia się w:
Geodesy and Cartography
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wind power plants : types, design and operation principles
Autorzy:
Tywoniuk, A.
Skorupka, Z.
Powiązania:
https://bibliotekanauki.pl/articles/244681.pdf
Data publikacji:
2018
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
wind energy
wind power plants
energy conversion
renewable energy
Opis:
Many countries worldwide support green energy production on large scale mostly by solar or wind energy subsidizing manufacture and operation of such systems. During the last two decades, there has been significant increase in wind energy production globally. Statistics show continuously growing investments in the development and installation of wind turbines and farms. Currently, wind energy is the second most important source of renewable energy after water energy. By 2016 global cumulative installed wind capacity surpassed 432 k MW [GWEC]. In last several years, most dynamic growth in wind power generation investments was recorded in Asia. Europe, in comparison, has less impressive but steady growth in wind power plants through the years. In this article, authors present global demand on energy in comparison to efficiency of wind power plants in relation to the local and global location as well as to the scale of installed system. Authors also present statistical data concerning wind power plants development. General classification, using number of criteria (ex. power output, construction size, rotor axis orientation and other) of wind to electric power converting devices is presented. Various types of devices, which authors describe in this article, can perform conversion of wind blow energy to the electric energy using different yet similar methods.
Źródło:
Journal of KONES; 2018, 25, 3; 479-487
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design and investigations of the ethanol microturbine
Autorzy:
Kosowski, K.
Piwowarski, M.
Stępień, R.
Włodarski, W.
Powiązania:
https://bibliotekanauki.pl/articles/239955.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
micro-power generation
microturbine
ORC power plants
wytwarzanie
mikroenergia
mikroturbina
siłownie ORC
Opis:
The paper presents the results of the design analysis and experimental investigations of the microturbine set consisting of the microturbine with partial admission and permanent magnet generator. The microturbine was designed for operation with the vapour of ethanol as a working fluid. Microturbine unit was tested for different parameters of the working fluid and varying the electrical load. The examples and the comparison between experiment results and numerical simulations are shown and discussed in the paper.
Źródło:
Archives of Thermodynamics; 2018, 39, 2; 41-54
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The assessment of surface layers texture of the fouling gathered on the heat transfer surfaces within regenerative feedwater heat exchangers
Autorzy:
Hajduk, T.
Powiązania:
https://bibliotekanauki.pl/articles/246269.pdf
Data publikacji:
2017
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
steam power plants
heat recovery devices
fouling
surface layer texture
Opis:
The fouling presence on the heat transfer surfaces, both on the waterside and the steam side of the steam power plants heat recovery exchangers usually leads to the loss of their heat transfer capacities. This loss appears owing to the high value of heat resistance of fouling. Furthermore, these deposits are most often formed with irregularities in the surface layers. These textures are usually characterized by a varied, often stochastic and difficult to define, geometric structures. The most common measure of their inequalities is the roughness parameter describing the surface geometry. The fouling surface layer texture can, on one hand, cause enhancement of the heat transfer process, but on the other hand, it may contribute to an additional increase in thermal degradation of the heat exchanger. Many experimental studies have shown that the greater the unevenness of the heat transfer surface on the waterside of a given heat transfer device, the smaller increase in the thermal resistance of the impurities over time, thereby increasing the amount of heat transferred. It should be emphasized, however, that the rise in roughness results in an increase in the heat transfer coefficient, while simultaneously intensifying the flow resistance of the working medium. Taking into account the heat transfer surface by steam side, the increase in the roughness promotes the formation of a thicker condensate layer, thus impairing the condensate drainage organization. It can be explained by the fact that deposits settle in a sort of quasi-rib effect, although with undefined ribbed grid, it may lead to the overflow of inter-finned passages. The article shows the previously mentioned phenomena and also presents the descriptive quantities for the fouling surface layer texture, based on the results of the author’s own experimental research.
Źródło:
Journal of KONES; 2017, 24, 4; 55-60
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the Goliński-Jesionek multistage combined air/steam systems with external combustion
Autorzy:
Gnutek, Z.
Powiązania:
https://bibliotekanauki.pl/articles/175431.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
binary cycles
combined cycles
external combustion
air/steam power plants
Opis:
In the paper a brief review of an air/steam set of thermodynamic cycles dedicated for energy production is presented. The main aim of this work is show to the Goliński-Jesionek multistage combined air/steam plants which improve efficiency. For this purpose, systems are first studied and secondly new concept is presented.
Źródło:
Transactions of the Institute of Fluid-Flow Machinery; 2014, 126; 33-54
0079-3205
Pojawia się w:
Transactions of the Institute of Fluid-Flow Machinery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Adress for Professor Krzysztof Jan Jesionek Anniversary
Autorzy:
Lewandowski, J.
Gnutek, Z.
Badur, J.
Powiązania:
https://bibliotekanauki.pl/articles/175358.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
steam and gas turbine
power boiler
compressors
fluid-flow machinery
power plants
Opis:
This article presents professional activity of Krzysztof Jesionek within the background of his personal career in the field of heat and power engineering on Wrocław University of Technology. In particular, we present stages of scientific and professional development with an emphasis on nature Professor Jesionek’s career main driving forces as a result of his cooperation with industry and power engineering.
Źródło:
Transactions of the Institute of Fluid-Flow Machinery; 2014, 126; 3-20
0079-3205
Pojawia się w:
Transactions of the Institute of Fluid-Flow Machinery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Uwarunkowania rozwoju elektrowni opalanych węglem brunatnym
Conditions of lignite fired power plants development
Autorzy:
Patrycy, A.
Powiązania:
https://bibliotekanauki.pl/articles/350737.pdf
Data publikacji:
2007
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
energetyka
elektrownie węglowe
czysta energia
power sector
coal power plants
clean energy
Opis:
W artykule omówiono uwarunkowania budowy elektrowni opalanych węglem brunatnym w Polsce w zakresie prognozy wzrostu zapotrzebowania na energię elektryczną oraz aspektów związanych z koniecznością dotrzymania standardów ochrony środowiska naturalnego obowiązujących w Unii Europejskiej. Dokonano przeglądu "czystych" ekologicznie technologii wytwarzania energii elektrycznej na paliwie węglowym oraz podano przykłady ich realizacji.
This lecture discusses conditions of providing construction of lignite fired power plants in Poland with respect to: prognosis of increase of electrical energy demands and complexions related to necessity to maintain natural environment protection standards which are mandatory in European Community. An overview of ecologically "clean" coal fuel based technologies of electrical energy production and presentation of some realization examples have been provided therein.
Źródło:
Górnictwo i Geoinżynieria; 2007, 31, 2; 501-510
1732-6702
Pojawia się w:
Górnictwo i Geoinżynieria
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Diagnostics of vessel power plants
Autorzy:
Charchalis, A.
Powiązania:
https://bibliotekanauki.pl/articles/247146.pdf
Data publikacji:
2011
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
technical diagnostics
piston engines
gas turbine engines
vessel power plants
Opis:
In this paper, the problems of diagnostics of main propulsion marine engines are presented. Diesel or turbine engines are used for main propulsion of vessel power plants. Marine engine is a complex technical object. For the purpose of diagnostics it is convenient to divide the engine into several units - subsystems such as: piston -crank assembly; working medium exchange system, fuel supply system, lubricating system, cooling system, starting up -reversing system; combustion chamber. The organization of the marine engine diagnostic process can usually come down to two stages, general diagnostics and damage location. Most popular in marine engine diagnostics have been the periodic run analyzers, called pressure analyzers, electronic indicators or MIP (Mean Indicated Pressure) calculators. Marine turbine engine operation requires professional technical supervision. The basic diagnostic system of marine turbine engine is able to assess the current engine condition and give forecast concerning its future operation in a complex way with the use of computer technology. Working out operating decision was based on proper preparation of operational parameters which were processed in a computer according to defined algorithms. Diesel engine diagnostic systems of merchant vessel engines are discussed. Finally, description of diagnostic methods implemented in turbine and piston engines in Polish Navy ships are introduced.
Źródło:
Journal of KONES; 2011, 18, 2; 41-47
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of expert systems in diagnostics, management and logistics
Autorzy:
Korczewski, Z.
Powiązania:
https://bibliotekanauki.pl/articles/259842.pdf
Data publikacji:
2008
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
diagnostics
expert systems
logistics
management
power plants
simulate human behaviour
Opis:
There has been demonstrated base terms concerning expert systems and analysis of their organisation structure. Some possibilities of the expert knowledge codification worked out on the basis of different application of the object-attribute-value triplets have been presented as well.
Źródło:
Polish Maritime Research; 2008, 3; 86-91
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hazard assessment in case of external flooding
Autorzy:
Iancu, A.
Berg, H. P.
Krauß, M.
Powiązania:
https://bibliotekanauki.pl/articles/2069098.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
external hazards
flooding
safety assessment
modelling
applications
nuclear power plants
Opis:
Risks relating to external hazards, either natural or man-made, have to be taken into consideration in the design of nuclear and other industrial facilities. These risks have to be studied to guarantee the availability and efficiency of safety functions which, e.g. in the case of power reactors, enable a safe shutdown, maintain the reactor in a safe shutdown state, ensure the residual heat removal and the containment of radioactive products. With a view to design protection against risks related to external hazards, these hazards have to be assessed in an appropriate manner. The methods used can be either deterministic or probabilistic. In both cases, the method strongly relies on observations (e.g. flood records) that are processed to define a maximum event for the respective facility design. Moreover, the validity of these records over a certain time frame like 100 years has to be checked. Coping with external hazards such as flooding in the future requires an in-depth assessment taking into account new data, further developed methodologies and criteria. Some of these ideas, developments and applications are provided.
Źródło:
Journal of Polish Safety and Reliability Association; 2016, 7, 1; 87--98
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-25 z 166

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