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Tytuł:
Comparative study of hybrid foam microstructure models
Autorzy:
Szymczyk, W.
Miedzińska, D.
Powiązania:
https://bibliotekanauki.pl/articles/246261.pdf
Data publikacji:
2010
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
FEM modelling
foam structure
elastomer filament
geometry orientation
Opis:
Cellular solids are materials made out of solid strut or thin plate like structures bridged together. They occur in nature in the form of honeycombs, wood, bone, cork etc. These materials possess a unique combination of properties such as low thermal conductivitv, low density and high energy-absorption. Foams are a class of cellular solids, generally made by dispersing gas into a liquid material and then cooling it to solidify. They are categorized as open-cell and closed-cell foams. Depending on the solid materials that are made into foams, they are also categorized as polymeric foams, metallic foams, and ceramic foams. Due to developments in material science and manufacturing lechniques, advanced foams have found potential for use in automobile, aircraft, and space vehicle structures. In the paper the comparative study of the hybrid foam microstructures is presented. Hybrid foam is a new, still developed material that is built of the aluminum open cell foam matrix filled with other material (here: elastomer). The numerical models based on cubic geometry in different configurations are developed. The FE analysis of the compression test is curried out. The results are presented and analyzed due to the microstructure geometry influence on the material behaviour.
Źródło:
Journal of KONES; 2010, 17, 4; 505-511
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Failure analysis of chosen 3D numerical models of an open cell foam
Autorzy:
Szymczyk, W.
Miedzińska, D.
Powiązania:
https://bibliotekanauki.pl/articles/243845.pdf
Data publikacji:
2010
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
FEM modelling
open cell foam structure
Opis:
Metal and polyurethane foams exhibit interesting properties. They are light, have good acoustic and/or magnetic isolation as well as ability to absorb the vibration and impact energy. They are used for sandwich panels, impact absorbers (i.e. as elements of the buffer constructions in rail vehicles), fillers ofconstruction parts, bodies of vehicles (i.e. floating combat vehicles) and for dividing walls of vessels and others. Speciflcally made open cell foams demonstrate auxetic properties and the shape memory effect. Such materials are very good for seats in aircrafts which may protect pilots and passengers during crashes and limit heavy backbone injuries. Foams are used for filtering purposes. Foams or their in combination with different types of fillers (i.e. elastomers) or the ceramic reinforcement may be used in impact energy absorbing panels for military aim (protection against an explosion shock wave and splinters). In the paper aluminium open-cell foam structures were investigated for their energy absorption ability. For this purpose a series of numerical 3D models were applied. Geometry of the models was based on Kehin's polyhedrons. Tests of uniaxial compression were simulated with the use of LS-Dyna computer code. Complex contact phenomena were considered. Preliminary test were performed with the use of single foam cell models. Further simulations were conducted using 3x3x3 cell models. The results were analyzed as force/time characteristics.
Źródło:
Journal of KONES; 2010, 17, 1; 449-454
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical analysis of an open cell foam structure with the use of models based on 2D finite elements
Autorzy:
Szymczyk, W.
Miedzińska, D.
Powiązania:
https://bibliotekanauki.pl/articles/242137.pdf
Data publikacji:
2009
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
FEM modelling
open cell foam structure
effective properties
Opis:
The paper deals with the numerical analysis of foam materials. Open cell foam is investigated. Numerical simulations allow calculating modes of destruction and assessing effective properties of the model structures. Metal as well as polyurethane foams show out interesting properties. They are light, have good acoustic and/or magnetic isolation, have ability to absorb energy of vibration and hits. They are used for sandwich panels, hit absorber s (i.e. as elements of buffer constructions in rail vehicles),fillers of construction parts, bodies of vehicles (i.e. floating combat vehicles), dividing walls on vessels and others. Specially prepared open cell foams show out auxetic properties and shape memory effect. Such materials are very good for seats in aircrafts which may protect pilots and passengers during crashes and restrict heavy backbone injuries. Foams are used for filtering purposes. Foams themselves or in combination with different types of fillers (i.e. elastomers) or ceramic reinforcement may be used for hit energy absorbing panels for military purposes (protection against explosion shock wave and splinters). Presented work is a part of a series of numerical experiments which aim is to investigate the influence of geometry parameters onto effective properties of the foam. Different types of geometries are used for numerical experiments. All the models of single foam cell are based on Kelvin grain geometry. Numerical compression tests performed with the use of models based on 2D finite elements provide studying the process of the structure failure. Effective characteristics of investigated foams show out that such materials would be useful for energy absorbing purposes.
Źródło:
Journal of KONES; 2009, 16, 2; 441-448
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical analysis of an open cell foam structure with the use of models based on solid finite elements
Autorzy:
Szymczyk, W.
Miedzińska, D.
Powiązania:
https://bibliotekanauki.pl/articles/245581.pdf
Data publikacji:
2009
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
FEM modelling
open cell foam structure
effective properties
Opis:
The paper deals with the numerical analysis of foam materials. Open cell foam is investigated. Numerical simulations allow calculating modes of destruction and assessing effective properties of the model structures. Metal as well as polyurethane foams show out interesting properties. They are light, have good acoustic and/or magnetic isolation, have ability to absorb energy of vibration and hits. They are used for sandwich panels, hit absorber s (i.e. as elements of buffer constructions in rail vehicles), fillers of construction parts, bodies of vehicles (i. e. floating combat vehicles), dividing walls on vessels and others. Specially prepared open cell foams show out auxetic properties and shape memory effect. Such materials are very good for seats in aircrafts which may protect pilots and passengers during crashes and restrict heavy backbone injuries. Foams are used for filtering purposes. Foams themselves or in combination with different types of fillers (i.e. elastomers) or ceramic reinforcement may be used for hit energy absorbing panels for military purposes (protection against explosion shock wave and splinters). Presented work is apart of a series of numerical experiments which aim is to investigate the influence of geometry parameters onto effective properties of the foam. Different types of geometries are used for numerical experiments. All the models of single foam cell are based on Kelvin grain geometry. Numerical compression tests performed with the use of models based on solid finite elements provide studying the process of the structure failure. Effective characteristics of investigated foams show out that such materials would be useful for energy absorbing purposes.
Źródło:
Journal of KONES; 2009, 16, 3; 409-414
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Laboratory hydraulic fracturing tests of rock samples with water, carbon dioxide, and slickwater
Szczelinowanie hydrauliczne próbek skalnych za pomocą wody, ditlenku węgla oraz „slickwater”
Autorzy:
Stanisławek, S.
Kędzierski, P.
Miedzińska, D.
Powiązania:
https://bibliotekanauki.pl/articles/230264.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
szczelinowanie hydrauliczne
stanowisko do szczelinowania
wytrzymałość na rozciąganie
skała
woda
ditlenek węgla
slickwater
hydraulic fracturing
fracturing test stand
tensile strength
rock
water
carbon dioxide
Opis:
Hydraulic fracturing of rocks boosts the production rate by increasing the fracture-face surface area through the use of a pressurized liquid. Complex stress distribution and magnitude are the main factors that hinder the use of information gathered from in situ hydraulic fracturing in other locations. Laboratory tests are a good method for precisely determining the characteristics of these processes. One of the most important parameters is breakdown pressure, defined as the wellbore pressure necessary to induce a hydraulic fracture. Therefore, the main purpose of this investigation is to verify fracture resistance of rock samples fractured with the assistance of the most popular industry fluids. The experiments were carried out using a stand designed specifically for laboratory hydraulic fracturing. Repeatable results with a relative error within the range of 6-11% prove that the experimental methodology was correct. Moreover, the obtained results show that fracturing pressure depends significantly on fluid type. In the case of a water test, the fracturing pressure was 7.1±0.4MPa. A similar result was achieved for slickwater, 7.5±0.7MPa; however, a much lower value (4.7±0.5MPa) was registered in the case of carbon dioxide.
Szczelinowanie hydrauliczne polega na niszczeniu skały za pomocą płynu pod wysokim ciśnieniem w celu zwiększenia powierzchni spękań, co poprawia wydajność produkcyjna. Rozkład naprężenia w górotworach i jego wielkoś jest zwykle relatywnie skomplikowana, a to utrudnia wykorzystanie informacji zgromadzonych w trakcie procesu szczelinowania w innej lokalizacji. Przy tym zwykle prace prowadzone są na dużym obszarze, a znaczna część instalacji znajduje się pod ziemią. W efekcie wiedza na temat warunków, w których przeprowadzono proces jest zwykle ograniczona. Dlatego próby laboratoryjne stanowią dobrą metodę weryfikacji parametrów procesu. Jedną z najistotniejszych wielkości jest ciśnienie szczelinowania niezbędne do wytworzenia spękań. Decyduje ono zarówno o parametrach instalacji szczelinującej jak i ma wpływ na aktywność sejsmiczną obszaru. W literaturze istnieją wzory pozwalające szacować wielkość ciśnienia szczelinującego, jednak nie uwzględniają one roli płynu szczelinującego. Najpopularniejszym medium szczelinującym stosowanym w przemyśle jest woda, często domieszkowana specjalnymi dodatkami redukującymi tarcie. W górotworach o szczególnie zwartej budowie stosuje się zwykle ditlenek węgla lub azot. Dotychczasowe badania nad wpływem płynu szczelinującego na wielkość ciśnienia miały ograniczony charakter. Ze względu na ten fakt praca podejmuje to zagadnienie.
Źródło:
Archives of Civil Engineering; 2017, 63, 3; 139-148
1230-2945
Pojawia się w:
Archives of Civil Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of the volume fraction of the carbonyl iron particles on the mechanical properties of the magnetorheological elastomers
Autorzy:
Sławiński, G.
Niezgoda, T.
Miedzińska, D.
Gieleta, R.
Powiązania:
https://bibliotekanauki.pl/articles/247437.pdf
Data publikacji:
2010
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
smart materials
magnetorheological elastomer (MRE)
finite element method (FEM)
Opis:
Magnetorheological materials belong to the group of the so called intelligent materials. Their rheological properties can be changed in a large range using an external magnetic field. That is why they fmd ever growing application in modern technical equipment, among others in controlled dampers, clutches, sensors etc. In the paper, a numerical strength analysis of a magnetorheological material was presented. The influence of the volume fraction of carbonyl iron particles (the share of the carbonyl iron particles varied from 1.5 to 33.0 vol. %.) on the mechanical properties of the material were investigated, in particular on the Young's modulus variation. Experimental tests were carried out for specimens made of pure PU 70/30 elastomer with iron particles. They induded uniaxial compression tests. In the farmer case, specimens were in a shape of a cylinder with a diameter of 20 mm and a height of 25-30 mm. The results of experimental tests carried out in order to determine the parameters necessary to build the numerical model were induded in the paper. In the paper, an algorithm developed for determining the parameters for modelling the structure was presented. A fragment of the structure, containing several particles of iron and some quantity of elastomer, corresponding to the assumed volume fractions, was subjected to numerical analysis.
Źródło:
Journal of KONES; 2010, 17, 3; 401-406
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical investigations on vibrating motion with inertial load of vibratory pile hammer stiffly coupled with excavator
Autorzy:
Osiński, J.
Miedzińska, D.
Powiązania:
https://bibliotekanauki.pl/articles/247648.pdf
Data publikacji:
2014
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
elastomer
vibrations
simulation
resonance
numerical analysis
Opis:
A vibratory pile hammer (VPH) is a mechanical device used to drive steel piles as well as tube piles into soil to provide foundation support for buildings or other structures. In order to increase the stability and the efficiency of the VPH work in the over-resonance frequency, a new VPH construction was developed in the Military University of Technology. The new VPH contains a system of counter-rotating eccentric weights, powered by hydraulic motors, and designed in such a way that horizontal vibrations cancel out, while vertical vibrations are transmitted into the pile. This system is suspended in the static parts by the adaptive variable stiffness pillows based on a smart material, magnetorheological elastomer (MRE), which rheological and mechanical properties can be reversibly and rapidly controlled by an external magnetic field. The work presented in the paper is a part of the modified VPH construction design process. It concerns the development of the numerical model of the VPH and soil interaction that will describe resonance conditions, resonance frequencies with consideration of soil susceptibility, coupling phenomenon and elastomer changeable stiffness. On the base of developed theoretical equations, the frequency of VPH piling will be regulated to assure the over-resonance work.
Źródło:
Journal of KONES; 2014, 21, 1; 189-195
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Aluminium foam testing for impact energy absorption aims
Autorzy:
Niezgoda, T.
Miedzińska, D.
Powiązania:
https://bibliotekanauki.pl/articles/245628.pdf
Data publikacji:
2009
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
aluminium foam
microstructure modelling
open cell foam
closed cell foam
Opis:
Aluminium foams are a new group of materials used for impact energy absorbing elements. They are light (typically 10-25% of the density of the metal they are made of) and stiff, and are frequently proposed as a light weight structural material. That is why they often are applied in automotive and transport industry solutions, for example as parts of bumpers. The methods of numerical modelling for open and closed cell aluminium foams are presented in the paper as well as closed and open cellfoam microstructure model. The numerical models of foam ideal microstructures created with shell finite elements are shown. The models were developed on the basis of Kefain tetrakaidecahedrons - structures consisting of six squares and eight hexagons. In the case of closed cell foams, the polyhedron with full walls was adopted. In the case of open cell foams the circle wholes were removed from polyhedron surfaces. Then the numerical analysis of a created models compressive test was carried out with the usage of LS Dyna computer code. The nonlinear procedures were applied. The results were analyzed in the scope of energy absorbing properties of aluminium foams.
Źródło:
Journal of KONES; 2009, 16, 3; 283-289
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of coal structure in the aspect of gas content
Autorzy:
Niezgoda, T.
Miedzińska, D.
Małek, E.
Powiązania:
https://bibliotekanauki.pl/articles/298731.pdf
Data publikacji:
2013
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
carbon dioxide
methane
porosity of coal
Opis:
The problem of methane existence in coal beds has been known for many years. It was and still is a danger to coalminers. The aim of the research presented in the paper is to show and assess the porosity structure (especially micro and nanoporosity) in accordance to the dimensions of carbon dioxide particle. The characteristic surface morphology of the sample and the disclosure of carbon porous structure was obtain using the scanning electron microscope (SEM). The presented study of the coal microstructure is a part of the coal demethanation method with the use of liquid CO2, that was proposed by Military University of Technology. Based on the results of laboratory tests may be noted that the analyzed coal has a granular structure. It is also visible that that the structure is stratified, and there is a lot of cracks and free space between grains, which can accumulated methane in coal structure. The nanoporosity of the coal grains was observed during SEM study. The sizes and shapes of pores are miscellaneous. However the dimension of 62-300 nm allow to draw a conclusion, that the nanopores can contain a few particles of CH4 (4 A), which can be released by the CO2 particle (2.54 A). Finally, on the base of presented research it can be concluded that the method of coal demethanation with the use of CO2 can be economically and ecologically effective, and can increase the miners safety.
Źródło:
AGH Drilling, Oil, Gas; 2013, 30, 1; 169-179
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Carbon dioxide geosequestration method coupled with shale gas recovery
Autorzy:
Niezgoda, T.
Małek, E.
Miedzińska, D.
Powiązania:
https://bibliotekanauki.pl/articles/298651.pdf
Data publikacji:
2013
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
shale gas
carbon dioxide
geosequestration
Opis:
Shale gas in the United States over the past decade, and interest has spread to potential gas shales in Canada, Europe, Asia, and Australia. One analyst expects shale gas to supply as much as half the natural gas production in North America by 2020. Carbon dioxide capture and storage (CCS) is a set of technologies for the capture of CO2 from its anthropogenic point sources, its transport to a storage location, and its geosequestration. This is only one, though very important, option in a portfolio of actions to fight the increase of atmospheric CO2 concentration and to mitigate climate change, while at the same time allowing for the continued use of fossil fuels. Deployment of CCS technologies is expected to be limited in the next 5-10 years, but to contribute significantly to the reduction of CO2 emissions 20 years from now. Capture of CO2 using existing separation techniques can be applied to large point sources, i.e. power plants or industrial plants; CO2 can be easily transported over large distances using pipelines and ships; finally CO2 can be permanently stored in suitable deep geological formations, namely deep saline aquifers, oil or gas reservoirs, and unmineable coal seams, or it can be fixed in carbonates. The paper deals with the innovative method of carbon dioxide storage coupled with gas shale fracturing and methane recovery developed in the Military University of Technology. It allows to effectively mine the shale gas and to store carbon dioxide in shale rock. It must be noticed that CO2 pollution is a very important problem in Poland, because of European Union CO2 limits. Also carbon dioxide thermodynamic process of decompression numerical calculation, which simulates the injection of the cold liquid gas into the shale formation (high temperature and pressure conditions) and its influence on shale rock fracturing as well as initial experimental verification of the method was presented in the paper.
Źródło:
AGH Drilling, Oil, Gas; 2013, 30, 1; 161-167
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Energia z głębokich pokładów gorących suchych skał (HDR) do poprawy bezpieczeństwa infrastruktury krytycznej Polski
Autorzy:
Niezgoda, T.
Miedzińska, D.
Sławiński, G.
Powiązania:
https://bibliotekanauki.pl/articles/111049.pdf
Data publikacji:
2018
Wydawca:
Centrum Rzeczoznawstwa Budowlanego Sp. z o.o.
Tematy:
bezpieczeństwo energetyczne
energia
wydobycie ciepła
skały
infrastruktura krytyczna
energy security
energy
heat extraction
rocks
critical infrastructure
Opis:
W artykule przedstawiono zarys technologii wydobycia ciepła z głębokich pokładów gorących suchych skał (HDR – hot dry rocks), możliwości jej implementacji na terenie Polski oraz jej zalety w aspekcie zastosowania do poprawy bezpieczeństwa infrastruktury krytycznej, jak również poprawy bezpieczeństwa energetycznego Polski.
In the paper the scheme of technology of heat recovery from deep beds of hot dry rocks (HDR) and the possibilities of its applications in Poland were presented. Also the advantages of the HDR technology implementation in accordance to critical infrastructure safety improvement as well as for Poland energetic safety increase were shown.
Źródło:
Inżynieria Bezpieczeństwa Obiektów Antropogenicznych; 2018, 3-4; 65-69
2450-1859
2450-8721
Pojawia się w:
Inżynieria Bezpieczeństwa Obiektów Antropogenicznych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New method of carbon dioxide underground storage coupled with shale gas recovery
Autorzy:
Niezgoda, T.
Miedzińska, D.
Kędzierski, P.
Powiązania:
https://bibliotekanauki.pl/articles/246774.pdf
Data publikacji:
2012
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
shale gas
carbon dioxide
storage system
Opis:
Shale gas is natural gas produced from shale, a type of sedimentary rock. Shale gas has become an increasingly important source of natural gas in the United States over the past decade, and interest has spread to potential gas shales in Canada, Europe, Asia, and Australia. One analyst expects shale gas to supply as much as half the natural gas production in North America by 2020. As of 2010, Poland imports two-thirds of its natural gas from Russia. ConocoPhillips has announced plans to explore for shale gas in Poland, along with Lane energy. The recently made available US Department of Energy report revealed that the largest reserves of shale gas in Europe are in Poland. The authors of the report calculate that Poland has reserves of about 22.45 trillion cubic meters of shale gas, of which 5.30 trillion cubic meters is immediately available for extracting. The most common method of shale gas recovery is hydraulic fracturing - the propagation of fractures in a rock layer caused by the presence of a pressurized fluid. Hydraulic fractures form naturally, as in the case of veins or dikes, and is one means by which gas and petroleum from source rocks may migrate to reservoir rocks. This process is used to release petroleum, natural gas (including shale gas, tight gas and coal seam gas), or other substances for extraction, via a technique called induced hydraulic fracturing. The method is critically assessed by ecologists. The paper deals with new method of gas shale fracturing and gas recovery coupled with carbon dioxide storage. It allows to effectively mine the shale gas and to store carbon dioxide in shale rock. It must be noticed that CO2 pollution is a very important problem in Poland, because of European Union CO2 limits. Also the numerical calculation of carbon dioxide thermodynamical process of decompression process, which simulates the injection of the cold liquid gas into the shale formation (high temperature and pressure conditions) and its influence on shale rock fracturing will be presented.
Źródło:
Journal of KONES; 2012, 19, 3; 327-333
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Overview of issues related to mixing CO2 and proppant in the method of gas extraction from shale rocks
Autorzy:
Niezgoda, T.
Miedzińska, D.
Stanisławek, S.
Kwietniewski, M.
Powiązania:
https://bibliotekanauki.pl/articles/298655.pdf
Data publikacji:
2016
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
carbon dioxide
proppant
gas
shale
Opis:
To increase the efficiency of fracturing process, proppant materials are added to fracking fluid. This admixture allows to keep developed fracks, that tend to lock, opened. The aim of this overview is to present methods of carbon dioxide and proppant mixing. The most often applied methods are as follows: special medium admixing, direct proppant with CO2 mixing. Liquid CO2 and proppant blenders are currently commercially used, but are not very popular.
Źródło:
AGH Drilling, Oil, Gas; 2016, 33, 2; 307-313
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study on carbon dioxide thermodynamic behavior for the purpose of shale rock fracturing
Autorzy:
Niezgoda, T.
Miedzińska, D.
Małek, E.
Kędzierski, P.
Sławiński, G.
Powiązania:
https://bibliotekanauki.pl/articles/201878.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
carbon dioxide
shale gas
storage system
thermodynamics
FEM
Opis:
The possibility of using CO2 to fracturing a shale rock has been presented in the paper. The described innovative method which allows for the efficient extraction of shale gas and carbon dioxide storage in a shale rock was developed in Department of Mechanics and Applied Computer Science at the Military University of Technology, Warsaw, Poland. Firstly, the method was verified on the base of analytical and experimental research. In the next stage of the method verification carbon dioxide thermodynamic behavior was studied. The growth in pressure of drop of CO2 heated in a closed volume was numerically tested. The research confirmed the efficiency of the use of carbon dioxide as a medium for fracturing of rocks. The usage of liquid CO2 can be alternative for hydraulic fracturing and is safe for the environment.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2013, 61, 3; 605-612
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania eksperymentalne wpływu dwutlenku węgla na strukturę porowatą i właściwości mechaniczne skały łupkowej
Experimental study on influence of carbon dioxide on porous structure and mechanical properties of shale rock
Autorzy:
Miedzińska, D.
Powiązania:
https://bibliotekanauki.pl/articles/210249.pdf
Data publikacji:
2017
Wydawca:
Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:
geomechanika
skały łupkowe
dwutlenek węgla
geomechanics
shale rock
carbon dioxide
Opis:
Skały łupkowe są formacjami geologicznymi, może w nich występować materia organiczna, dzięki której mogą powstać niekonwencjonalne złoża gazu. Podczas ich interakcji z dwutlenkiem węgla, który może być stosowany jako czynnik szczelinujący do wydobycia gazu, zachodzi wiele zjawisk mających wpływ na strukturę i parametry wytrzymałościowe skały. W pracy przedstawiono badania zmian struktury skały łupkowej pod wpływem oddziaływania dwutlenku węgla w stanie nadkrytycznym oraz ich wpływ na właściwości wytrzymałościowe skały. Badania strukturalne zostały przeprowadzone przy użyciu technik mikroskopowych przy różnych powiększeniach obrazu. Jako test właściwości wytrzymałościowych przyjęto próbę jednoosiowego ściskania. W wyniku prac zaobserwowano pewną zależność. Im bardziej zmniejszyła się porowatość badanej próbki po infiltracji dwutlenkiem węgla w małych powiększeniach, tym bardziej zwiększyła się jej porowatość w dużych powiększeniach i tym mniejszą osiągnęła wytrzymałość na jednoosiowe ściskanie.
Shale rocks are geological formations which can be unconventional gas reservoirs. During their interaction with carbon dioxide, which can be used as a fracturing fluid in shale gas recovery process, many phenomena take place that can influence rock structure and mechanical properties. The research on changes in rock structure under super critical carbon dioxide interaction and their influence of shale properties were presented in the paper. The structural tests were carried out with the use of microscopic techniques with different resolutions of visualization. The uniaxial compression test was applied as a mechanical properties’ assessment experiment. As a result of research, some dependence was observed. The bigger decrease was in porosity after infiltration in lower zooms, the bigger increase in porosity in high zooms and mechanical properties was noticed.
Źródło:
Biuletyn Wojskowej Akademii Technicznej; 2017, 66, 4; 167-178
1234-5865
Pojawia się w:
Biuletyn Wojskowej Akademii Technicznej
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 32

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