Temat: oil pipelines - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Technical object environment signals and its elimination from diagnostic model
Autorzy:: Golak, K.
Grądzki, R.
Lindstedt, P.
Powiązania:: https://bibliotekanauki.pl/articles/246588.pdf
Data publikacji:: 2013
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: diagnostic
models
environment
compressor blades
oil pipelines
Opis:: Diagnostics of many common technical objects (compressor blades, oil pipelines) has been noticed to be realized mostly on the basis of measured diagnostic signals resulting from object operation without sufficient consideration given to usually difficult to measure signals of its environment. Such approach is inconsistent with basic rule of diagnostics that strictly orders research and analysis of technical condition in environment (PN-90/N-04002). Hence many works occurred concerning diagnostics of technical objects (e.g. compressor blades – in motion and in repose), characterized by the fact, that environment signals are taken into consideration without necessity of measuring them [2-7]. A necessity exists to elaborate new object diagnostic methods in repose and in operation including environment but without need (if possible) of using frequently unavailable or difficult to measure environment signals. This problem is solved by diagnostic methods based on diagnostic models allowing, through special operations, for elimination of real environment. Elimination of environment from model is possible as an effect of proper conduct of diagnostic research that in base form should include measurement of environment and diagnostic signals. In models A2 T12T01 and φT12T01 dependence on environment does not occur. Hence each change of model must be interpreted only as change of object technical condition. Such models might be applied for various objects operating in complex environments (eg. oil pipelines, bearings, etc.).
Źródło:: Journal of KONES; 2013, 20, 2; 121-126
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Sektor naftowy Ukrainy: historia i przyszłość
Oil sector of Ukraine: the history and future
Autorzy:: Voytyuk, O.
Powiązania:: https://bibliotekanauki.pl/articles/952522.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
Tematy:: ropa naftowa
rafinerie
złoża
pola naftowe
surowce
tranzyt
ropociąg
crude oil
oil deposits
oil fields
refineries
transit
oil pipelines
Opis:: Ukraiński sektor naftowy ma długoletnią historię. Na Ukrainie są trzy roponośne regiony – karpacki, dnieprowsko-doniecki i czarnomorski. Pierwsze wydobycie ropy naftowej miało miejsce w XIX wieku. W latach 20.–30. XX wieku Ukraina była eksporterem tego surowca. Obecnie potencjał naftowy Ukrainy jest niewielki. Największe złoża zostały wyeksploatowane, a złoża, które znalazły się na szelfie Morza Czarnego, zostały anektowane przez Rosję. Sektor naftowy Ukrainy jest obecnie w dość trudnej sytuacji. System ropociągowy, który niegdyś transportował ogromne ilości ropy do państw Europy Wschodniej, obecnie prawie nie istnieje. Spośród magistrali rurocią- gowych, ropę transportuje tylko rurociąg Przyjaźń, pozostałe są nieczynne. Z siedmiu ukraińskich rafinerii pracuje jedynie rafineria w Kremeńczuku, pozostałe wymagają modernizacji, która zwią- zana byłaby z poniesieniem dużych nakładów finansowych. Większość rafinerii pozostaje w rękach prywatnych, a ich właściciele nie spieszą się z renowacją. W związku z drastycznym pogorszeniem ukraińsko-rosyjskich stosunków, Ukraina szuka alternatywnych względem Rosji źródeł nabycia ropy. Istnieje kilka perspektywicznych projektów (nawiązania) współpracy z Azerbejdżanem i pań- stwami Bliskiego Wschodu. Jednak to, czy uda się je zrealizować, będzie zależało od sytuacji politycznej na Ukrainie oraz od przeprowadzenia reform gospodarczych.
The oil sector has a long history in Ukraine. There are three oil–bearing regions – Carpathian, Dnieper–Donetsk and the Black Sea region. The first production of crude oil began the nineteenth century. In the 20–30 years of the twentieth century, Ukraine was the exporter of the oil. Currently, Ukraine’s oil potential is small, the largest deposits are exploited, and deposits that were on the Black Sea shelf were annexed by Russia. Ukraine’s oil sector is currently in a rather difficult situation – oil pipeline system, which once transported huge amounts of oil to the countries of Eastern Europe, now barely exists. The only oil pipeline “Friendship” transporting crude oil to European Union, the rest of pipelines do not work. Among 7 Ukrainian refineries – works only refinery in Kremenchug, the rest refineries requires reconstruction, which carries a large financial outlay. Most refineries are in private hands, and their owners do not rush to make reforms. In view of the drastic deterioration of the Ukrainian–Russian relations, Ukraine is looking for alternatives to Russian oil. There are several perspective projects with Azerbaijan, and some the countries of the Middle East, but their realization will depend on the political situation in Ukraine and from making of the economic reforms.
Źródło:: Polityka Energetyczna; 2015, 18, 2; 129-146
1429-6675
Pojawia się w:: Polityka Energetyczna
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Dynamic vibration absorbers – optimization and design
Autorzy:: Pelekh, Ya.
Diveyev, B.
Hlobchak, M.
Powiązania:: https://bibliotekanauki.pl/articles/410921.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Oddział w Lublinie PAN
Tematy:: rotating machines
discreet-continuum theory
modal analysis
dynamic vibration absorber
optimal design
electrical plants
gas- and oil pipelines
aerospace technique
chisel installation
cars
magneto-optical disks
home appliances
maszyny wirujące
teoria układów dyskretno-ciągłych
analiza modalna
absorber wibracyjno-dynamiczny
optymalne kształtowanie
elektrociepłownie
rurociągi naftowo-gazowe
technika lotnicza
samochody
dyski magnetyczno-optyczne
sprzęt AGD
Opis:: The main aim of the paper is improved dynamic vibration absorbers (DVA) design, taking into account the complex rotating machines dynamics. It is often impossible to balance the rotating elements so as to reduce the vibration to an acceptable level. The paper considers the provision of DVA or number of such DVA. Such originally designed DVA reduces vibration selectively in the maximum mode of vibration without introducing vibration in other modes. The result is achieved at a far lower expense than would be required to replace the concrete and steel foundation with a more massive one. By installing DVA, one can minimize excitation virtually at the source. In order to be more effective, a vibration absorption system should react in all the frequency domains. The present absorber also has as an advantage that it can be constructed so that it has a wide-range vibration absorption property. This construction allows for an easy connection of the above rotor equipment. In order to determine the optimal parameters of DVA, the complete modeling of the rotating machine dynamics is obvious. The two degrees of freedom model are totally inadequate to accurately calculate the vibration frequencies of the construction and therefore, for a sufficiently accurate determination of its dimensional characteristics so as to determine such frequencies. It is therefore necessary in practice to dimension the construction through more complex modeling. In particular, concentrated mass and rigidity calculation methods may be adopted based on an even more accurate theoretical determination. The numerical schemes (NS) row is considered for the complex vibration-excited constructions. Methods of decomposition and the NS synthesis are considered on the basis of new methods of modal synthesis. Complex NS are obtained of discretely-continua type, which enables in the adaptive mode to calculate tension not only in the continuum elements, but in the places of the most tension concentration in joints. Traditional design methodology, based on discontinuous models of structures and machines is not effective for high frequency vibration. The present research develops a modern prediction and control methodology, based on complex continuum theory and application of special frequency characteristics of structures. Complex continuum theory allows to take into consideration system anisotropy, supporting structure strain effect on equipment motions and to determine some new effects that are not described by ordinary mechanics of the continuum theory. The absorbers in accordance with this paper may be applied not only to electric machines ore aeronautic structures, but also to any other type of vibration-excited structure, such as cars, chisel installation, optical, magneto-optical disks, washing machines, refrigerators, vacuum cleaners, etc.
Źródło:: ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2017, 6, 1; 23-30
2084-5715
Pojawia się w:: ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes
Dostawca treści:: Biblioteka Nauki

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