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Tytuł:
Explosion Characteristics of Water Gas for Fischer–Tropsch Process
Charakterystyka wybuchowości gazu wodnego w procesie Fischera–Tropscha
Autorzy:
Skrinsky, Jan
Veres, Jan
Kolonicny, Jan
Ochodek, Tadeas
Powiązania:
https://bibliotekanauki.pl/articles/319217.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Przeróbki Kopalin
Tematy:
modelowanie wybuchu
charakterystyka wybuchu
dwutlenek węgla
wodór
gaz wodny
explosion modeling
explosion characteristics
carbon dioxide
hydrogen
water gas
Opis:
Experimental study is presented for different CO-air and H2-air mixtures at a maximum concentration range. CO concentration ranges from 12.5 ± 0.2 % vol. to 70.5 ± 0.2 % vol. and H2 concentration ranges from 4.5 ± 0.2 % vol. to 76.0 ± 0.2 % vol. in a mixture with air at ambient atmospheric pressure (1 bar) and temperature (25°C). The explosion parameters of explosion pressure and maximum rate of pressure rise for water gas-air mixture were measured within the studied range, i.e. 0.30–2.13 at temperature of 25°C and pressure of 101 kPa. The experimental values of the maximum explosion pressure is compared with the mathematical modeling of this gas. The influence of initial concentration on the explosion characteristics were discussed.
Przedstawiono badania eksperymentalne dla różnych mieszanin CO-powietrze i H2-powietrze w maksymalnym zakresie stężeń. Zakres stężenia CO wynosi od 12,5 ± 0,2% obj. do 70,5 ± 0,2% obj. i stężenie H2 wynosi od 4,5 ± 0,2% obj. do 76,0 ± 0,2% obj. w mieszaninie z powietrzem o ciśnieniu atmosferycznym otoczenia (1 bar) i temperaturze (25°C). Parametry wybuchu – ciśnienia wybuchu i maksymalnej szybkości wzrostu ciśnienia dla mieszaniny woda-gaz mierzono w badanym zakresie, tj. 0,30–2,13 w temperaturze 25°C i ciśnieniu 101 kPa. Wartości eksperymentalne maksymalnego ciśnienia wybuchu porównuje się z modelem matematycznym tego gazu. Omówiono wpływ początkowego stężenia na charakterystykę wybuchu.
Źródło:
Inżynieria Mineralna; 2019, 21, 1/2; 117-121
1640-4920
Pojawia się w:
Inżynieria Mineralna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determining the gas-water contact moving boundary in underground gas storage operation
Autorzy:
Pyanylo, J.
Vabrychuk, P.
Powiązania:
https://bibliotekanauki.pl/articles/1938602.pdf
Data publikacji:
2016
Wydawca:
Politechnika Gdańska
Tematy:
gas injection process modelling
withdrawal
porous media
gas replacing
gas-water contact
GWC
hydraulic integration
Opis:
We considered the characteristics of key technological objects involved in gas storage. Mathematical models of groups of hydraulically related objects (system mathematical models) are constructed and described. Problems are set and examples of application of analytical and numerical methods for their solution are provided
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2016, 20, 1; 33-41
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulating Filtration to Evaluate Hydrodynamic Indices of the Underground Gas Storage Operation
Symulacja filtracji w celu oceny wskaźników hydrodynamicznych podziemnego magazynowania gazu
Autorzy:
Sadovenko, Іvan
Inkin, Оlexander
Dereviahina, Nataliia
Powiązania:
https://bibliotekanauki.pl/articles/2200994.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Przeróbki Kopalin
Tematy:
aquifer
gas storage
filtration
gas water contact
nonuniformity
warstwa wodonośna
magazynowanie gazu
filtracja
kontakt gazu z wodą
niejednorodność
Opis:
The research objective is to develop and test mathematical model of gas storage in the layered aquifer with poorly permeable interlayer if plane-parallel and axisymmetric filtration takes place. The paper evaluates the gas-hydrodynamic operational indices of the underground gas storages within aquifers in the South East Ukraine. Comprehensive approach has been applied involving collection, systematization, and analysis of actual data on filtration and physicomechanical properties of enclosing rocks impacting formation of natural and technogenic deposits as well as analytical and numerical methods to solve equations of the gas-water contact shift under different conditions. A gas-hydrodynamic model of underground gas storage within the nonuniform aquifer has been substantiated to calculate its cyclic operation in the three-layered seam taking into consideration crossflows through a poorly permeable stopping. The calculation results show significant impact of characteristics of the layered porous environment on the gas water contact transfer through certain seams. The derived new technique linearizing a system of differential equations to identify pressure within a reservoir is generalization of the earlier applied procedures with introduction of ‘boundary schemes’. The calculation results demonstrate significant impact of the layered porous environment on the gas water contact transfer through certain seams. The findings may be applied while making evaluations at the stage of gas storage design within aquifers.
Celem badań jest opracowanie i przetestowanie modelu matematycznego magazynowania gazu w warstwie wodonośnej ze słabo przepuszczalną międzywarstwą, przy założeniu filtracji płasko-rownóległej i osiowo-symetrycznej. W artykule dokonano oceny gazowo-hydrodynamicznych wskaźników eksploatacyjnych podziemnych magazynów gazu w warstwach wodonośnych południowo- wschodniej Ukrainy. Zastosowano kompleksowe podejście polegające na zebraniu, usystematyzowaniu i analizie rzeczywistych danych, dotyczących właściwości filtracyjnych i fizykomechanicznych skał otaczających, wpływających na powstawanie osadów naturalnych i technogenicznych, a także analityczne i numeryczne metody rozwiązywania równań przesunięcia kontaktu gaz-woda w rożnych warunkach. Model gazowo-hydrodynamiczny podziemnego magazynowania gazu w niejednorodnej warstwie wodonośnej został uzasadniony w celu obliczenia jego cyklicznej pracy w pokładzie trójwarstwowym z uwzględnieniem przepływów krzyżowych przez słabo przepuszczalną zaporę. Wyniki obliczeń wskazują na istotny wpływ charakterystyk warstwowego środowiska porowatego na kontakt gazu z wodą przez określone pokłady. Nową techniką linearyzującą układ równań różniczkowych do identyfikacji ciśnienia w zbiorniku jest uogólnienie wcześniej stosowanych procedur poprzez wprowadzenie „schematów brzegowych”. Wyniki obliczeń wskazują na istotny wpływ warstwowego środowiska porowatego na kontakt gazu z wodą przez określone pokłady. Uzyskane wyniki mogą być wykorzystane przy dokonywaniu ocen na etapie projektowania magazynów gazu w warstwach wodonośnych.
Źródło:
Inżynieria Mineralna; 2023, 1; 97--102
1640-4920
Pojawia się w:
Inżynieria Mineralna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research Project: “Design, environmental impact and performance of energized fluids for fracturing oil and gas reservoir rocks of Central Europe” (ENFLUID) – assumptions, evolution and results
Projekt badawczy: ”Projektowanie, wpływ na środowisko i skuteczność działania energetyzowanych cieczy do szczelinowania skał zbiornikowych ropy i gazu Europy Środkowej” (ENFLUID) – założenia, przebieg i rezultaty
Autorzy:
Lutyńska, S.
Turek, M.
Hamouda, A. A.
Cicha-Szot, R.
Leśniak, G.
Kasza, P.
Wilk, K.
Powiązania:
https://bibliotekanauki.pl/articles/1835237.pdf
Data publikacji:
2018
Wydawca:
Instytut Nafty i Gazu - Państwowy Instytut Badawczy
Tematy:
hydraulic fracturing
unconventional gas reservoirs
flowback water
gas-rock-water interactions
szczelinowanie hydrauliczne
niekonwencjonalne złoża gazu
płyn zwrotny
interakcje woda-skała-gaz
Opis:
The main goal of the project, realized by the Silesian University of Technology (as the Project Promotor), Oil and Gas Institute – National Research Institute and University of Stavanger, was the development of energized fracturing fluids for use in oil and gas reservoir formations in Central Europe. Transferring the American or foreign experience was not the solution, and already known methods may require modification or development. This has become important in the case of European gas shales, reservoir potential of which were the subject of intensive diagnosis when the project was launched. Within the framework of the project, composition of energized fracturing fluid for work in different formations of Central Europe was designed, mutual interactions between the fluids and the fractured rock were defined, the effects of energized fluids application on the geochemistry of the formation in the short and in the long-term were determined and the methods of treatment and recycling of flowback water were proposed. The project was focused on innovative technology, allowing for an efficient development of conventional and unconventional gas reservoirs, combined with maximum reduction of the negative impact of this process on the natural environment. The project also facilitated the strengthening and sharing of knowledge based on the fields of research and technological topics and issues of unconventional shale reservoirs.
Głównym celem projektu „ENFLUID”, realizowanego przez Politechnikę Śląską (w roli Koordynatora), Instytut Nafty i Gazu – Państwowy Instytut Badawczy oraz Uniwersytet Stavanger, było opracowanie optymalnego składu energetyzowanych cieczy szczelinujących, przydatnych do zastosowania w złożowych formacjach ropy i gazu Europy Środkowej. W tych specyficznych warunkach bezpośrednia adaptacja technologii i doświadczeń zagranicznych nie jest właściwym rozwiązaniem, a znane metody szczelinowania mogą wymagać modyfikacji lub rozwinięcia. Ma to szczególne znaczenie w przypadku łupków gazonośnych, których potencjał złożowy jest przedmiotem intensywnego rozpoznania. W ramach projektu opracowano skład energetyzowanych cieczy szczelinujących odpowiednich do zastosowania w różnych formacjach złożowych, zdefiniowano wzajemne interakcje pomiędzy cieczami a skałą poddawaną szczelinowaniu, określono jakie są skutki stosowania energetyzowanych cieczy szczelinujących na środowisko geochemiczne formacji w krótkim i długim okresie czasu oraz zaproponowano metody neutralizacji oraz recyklingu płynów zwrotnych ze szczelinowania. Realizacja projektu pozwoliła na stworzenie innowacyjnej technologii, ukierunkowanej na efektywne wykorzystanie konwencjonalnych i niekonwencjonalnych złóż gazu i ropy zamkniętych w formacjach złożowych Europy Środkowej, przy równoczesnej minimalizacji negatywnego wpływu tego procesu na środowisko naturalne.
Źródło:
Nafta-Gaz; 2018, 74, 6; 479-483
0867-8871
Pojawia się w:
Nafta-Gaz
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of hydrogen-enriched water gas production technology by processing Ekibastuz coal with technogenic waste
Autorzy:
Dikhanbaev, B.
Dikhanbaev, A. B.
Sultan, I.
Rusowicz, A.
Powiązania:
https://bibliotekanauki.pl/articles/140012.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
hydrogen-enriched water gas
reactor of inversion phase–rotary kiln–gas generator
cupreous cast iron
zinc-germanium containing sublimates
gaz wodny wzbogacony wodorem
reaktor fazy inwersyjnej-pieca obrotowego-generatora gazu
żeliwo miedziowe
sublimaty zawierające cynk-german
Opis:
In the dumps of metallurgical enterprises of Kazakhstan about 700 million tons of waste products are generated annually, and are polluting the atmosphere and the soil. The concentration of valuable components in waste products are no lower than in natural resources. The reserves of coal in the Ekibastuz basin are estimated to be more than a billion tons, and almost half of this is made up of ash. Every year, up to 30 million tons of ash-cinder waste is generated, which presents a serious threat to nature. Gallium and germanium concentrations in dumps are approximately 200 grams per ton, which is comparable to the content in coal before processing. The current research aims at creating a unit to obtain hydrogen-enriched water gas from Ekibastuz coal, with the production of zinc, gallium and germanium sublimates, copper-containing cast iron, slag wool and cast stone, through the joint processing of zinc-rich slag and ash-cinder wastes from thermal power plants. To achieve this, we used previous methods of extreme energy saving and a new method, the smelt layer with inversion phase. Experimental results from the “reactor inversion phase – rotary kiln” (RIPh) unit, which processed zinc-germanium contained slag, showed the potential to extract germanium from zinc sublimates, to reduce iron to the form of cupreous cast iron, and to obtain combustible gases and smelt suitable for slag-wool production. Calculations performed on the joint processing of Ekibastuz coal and zinc-rich slag using the proposed unit“ reactor of inversion phase–rotary kiln–gas generator” showed it can obtain hydrogen-enriched watergas, along with the extraction of valuable components of primary raw material.
Źródło:
Archive of Mechanical Engineering; 2018, LXV, 2; 221-231
0004-0738
Pojawia się w:
Archive of Mechanical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
K-mean cluster analysis for better determining the sweet spot intervals of the unconventional organic-rich shale: a case study
Autorzy:
Akbar, M. N. A.
Nugraha, S. T.
Powiązania:
https://bibliotekanauki.pl/articles/100894.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Śląski. Wydział Nauk o Ziemi
Tematy:
shale gas petrophysics
organic-rich shale
rock typing
cluster analysis
shale gas water saturation
sweet spot
gaz łupkowy
gaz ziemny
złoża łupkowe
nasycenie
Opis:
The petrophysical analysis is the crucial task for evaluating the quality of unconventional organic-rich shale and tight gas reservoirs. The presence of organic matter and the ultra-tight with over complex pore system have remained a lack of understanding of how to evaluate the extensive parameters of porosity considering organic content, gas saturation, organic richness, brittleness index, and sweet spot interval by only using conventional log. Therefore, this study offers effectively applied techniques and better analysis for interpreting these parameters by maximizing and integrating geological, geochemical, rock mechanical and engineering data. In general, the field data used in this study are from the first dedicated well for source rock exploration in the North Sumatra Basin, Indonesia. The developed method was derived by using conventional log. All interpretation results were validated by laboratory data measurements of routine and special core analysis, petrography, total organic carbon (TOC) and organic maturation, and brittleness index (BI) calculation. Moreover, the high quality of NMR log data was used as well to ensure our developed techniques present good estimations. Briefly about the methods, we started to determine the total and effective porosity based on the density log by including the presence of organic matter and multi-mineral analysis in these estimations. Then, we used the revised water saturation-TOC of water saturation while the TOC was predicted in advance by averaging three results from the correlation of TOC-Density, modified CARBOLOG and Passey’s ΔlogR methods. Equally important, in order to obtain the reliable gas saturation prediction, we used saturation exponent (n), cementation factor (m), and the tortuosity factor (a) parameters which obtained from laboratory measurement of formation resistivity factor and resistivity index (FFRI). In addition, the brittleness index was predicted based on sonic log data. Finally, all parameters needed for determining gas shale sweet spot have been made. Then, we developed a way to evaluate the sweet spot interval by using K-mean clustering. In conclusion, this clustering result properly follows the shale quality index parameters which consist of organic richness and maturation, brittleness index, the storage capacity of porosity and gas saturation. This study shows that these petrophysical applied techniques leads us to interpret the best position of shale interval to be developed with a simple, fast, and accurate prediction way. Furthermore, as a novelty, this method can be used as rock typing method and obviously can reduce uncertainty and risks in organic-rich shale exploration.
Źródło:
Contemporary Trends in Geoscience; 2018, 7, 2; 200-213
2299-8179
Pojawia się w:
Contemporary Trends in Geoscience
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Phenomena at interface of saline aquifer and claystone caprock under conditions of CO2 storage
Autorzy:
Labus, K.
Powiązania:
https://bibliotekanauki.pl/articles/191188.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
aquifer CO2 sequestration
gas–rock–water interactions
caprock reactivity
geochemical modelling
Upper Silesian Coal Basin
Opis:
When modelling the impact of the hydrogeochemical processes of CO2 sequestration on the contact zone of a saline sandstone aquifer and a claystone caprock in the Upper Silesian Coal Basin, small decreases in porosity were noted, visible mainly in the aquifer rocks. They were due to the degradation of kaolinite, albite and muscovite, and the recrystallization of K-feldspar and quartz. The porosity of the caprock remained almost unchanged, which was to the advantage of the integrity of the repository. In major parts of the aquifer and caprock zone, the mineral trapping of CO2 has beneficial effects, but at the interface of the aquifer and the insulating layer, in the basal part of the caprock, a release of carbon dioxide may occur temporarily, associated with the dissolution of calcite.
Źródło:
Annales Societatis Geologorum Poloniae; 2012, 82, 3; 255--262
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of heat flow in a tube bank of a condenser considering the influence of air
Autorzy:
Joachimiak, M.
Joachimiak, D.
Krzyślak, P.
Powiązania:
https://bibliotekanauki.pl/articles/240202.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
condensation
inert gas
mass share of gas noncondensing in water vapor
Dalton’s law
water vapor pressure
air partial pressure
kondensacja
gaz obojętny
Prawo Daltona
ciśnienie pary wodnej
ciśnienie parcjalne
Opis:
The pressure of wet water vapor inside a condenser has a great impact on the efficiency of thermal cycle. The value of this pressure depends on the mass share of inert gases (air). The knowledge of the spots where the air accumulates allows its effective extraction from the condenser, thus improving the conditions of condensation. The condensation of water vapor with the share of inert gas in a model tube bank of a condenser has been analyzed in this paper. The models include a static pressure loss of the water vapor/air mixture and the resultant changes in the water vapor parameters. The mass share of air in water vapor was calculated using the Dalton’s law. The model includes changes of flow and thermodynamic parameters based on the partial pressure of water vapor utilizing programmed water vapor tables. In the description of the conditions of condensation the Nusselts theory was applied. The model allows for a deterioration of the heat flow conditions resulting from the presence of air. The paper contains calculations of the water vapor flow with the initial mass share of air in the range 0.2 to 1%. The results of calculations clearly show a great impact of the share of air on the flow conditions and the deterioration of the conditions of condensation. The data obtained through the model for a given air/water vapor mixture velocity upstream of the tube bank allow for identification of the spots where the air accumulates.
Źródło:
Archives of Thermodynamics; 2017, 38, 3; 119-134
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Local cavitation due to water hammer
Autorzy:
Mitosek, M.
Kodura, A.
Rybak-Wilusz, E.
Powiązania:
https://bibliotekanauki.pl/articles/241414.pdf
Data publikacji:
2003
Wydawca:
Polska Akademia Nauk. Instytut Budownictwa Wodnego PAN
Tematy:
water hammer
cavitation
pressure oscillations
gas desorption
Opis:
The phenomenon of vapour cavitation due to water hammer is investigated ex-perimentally using high frequency pressure transducers (piezoelectric and strain gauges). The water hammer is caused by a sudden closure of a ball valve mounted at the end of the steel pipe. A short-duration pressure pulse, as well as high frequency cavitation pressure oscillations is observed. The high frequency pressure oscillations appear just after the vapour cavity collapse, whereas the pressure pulse does not occur immediately after collapse but is delayed from 0 to the water hammer period $2L/c$, s. The experiments have shown that the maxi-mum high frequency pressure oscillation, directly proportional to the pressure wave velocity, can be many times higher than the maximum water hammer pres-sure amplitude as well as short-duration pressure pulse. The influence of liquid evaporation duration and the steady state losses on the maximum high frequency cavitation pressure oscillation are shown. Growing pressure reduction is accom-panied by gas desorption from the liquid. The liberated air reduces the amplitude of the pressure increase and prolongs the period of oscillations. The experiments have shown that there are three phases of the maximum amplitude of high fre-quency pressure oscillations for each fixed steady state loss. The frequency of va-pour cavitation pressure oscillations depends on the duration of the oscillations. For the test cases, the frequency increases during the cavitation from ca. 400 to 900 Hz for steel pipes.
Źródło:
Archives of Hydro-Engineering and Environmental Mechanics; 2003, 50, 1; 59-72
1231-3726
Pojawia się w:
Archives of Hydro-Engineering and Environmental Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessing the effects of water withdrawal for hydraulic fracturing on surface water and groundwater - a review
Autorzy:
Saha, Gopal Chandra
Quinn, Michael
Powiązania:
https://bibliotekanauki.pl/articles/1445100.pdf
Data publikacji:
2020
Wydawca:
Instytut Meteorologii i Gospodarki Wodnej - Państwowy Instytut Badawczy
Tematy:
groundwater
surface water
hydraulic fracturing
water withdrawal
shale oil
gas production
Opis:
The interaction between groundwater and surface water plays an important role in the function of riparian ecosystems and sustainable water resource management. Hydraulic fracturing, an unconventional oil and gas well stimulation method, has increased dramatically in North America in an effort to exploit previously inaccessible shale oil and gas reserves. Hydraulic fracturing often requires several thousand cubic meters of water to fracture the source formations. Use of such a high volume of water has raised considerable public concern over the sustainability of this activity and the potential impacts on surface water and groundwater. This paper provides a review of the published literature addressing the effects of water withdrawal for hydraulic fracturing on surface water and groundwater. The potential effects of such withdrawal are: decreased volume of water in rivers, streams, lakes and aquifers; alteration of natural flow regimes; regional water shortages during periods of drought; creating conflicts with other water users in water-stressed regions; inadequate downstream water availability; reduced downstream water quality for human uses, due to less water availability for dilution; and degradation of habitat and aquatic ecosystem function, impacting local wildlife. This review demonstrates that relatively little attention has been paid to quantify and understand these interactions, and suggests that there is a significant need for further research in this area to address the currently limited availability of data.
Źródło:
Meteorology Hydrology and Water Management. Research and Operational Applications; 2020, 8, 2; 52-59
2299-3835
2353-5652
Pojawia się w:
Meteorology Hydrology and Water Management. Research and Operational Applications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of water stress on the gas exchange parameters, productivity and seed health of buckwheat (Fagopyrum esculentum Moench)
Wpływ stresu wodnego na wskaźniki wymiany gazowej, produktywność i zawartość grzybni (Fagopyrum esculentum)
Autorzy:
Pszczolkowska, A.
Fordonski, G.
Kulik, T.
Olszewski, J.
Plodzien, K.
Lojko, M.
Powiązania:
https://bibliotekanauki.pl/articles/28298.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
water stress
gas exchange
gas exchange parameter
productivity
seed health
buckwheat
Fagopyrum esculentum
polymerase chain reaction
water deficit
protein content
Opis:
The present pot experiment studied the effect of different soil moisture contents (60 – 70% CWC (capillary water capacity) – control; 30 – 35% CWC – water stress) on buckwheat productivity, the gas exchange parameters and health of buckwheat nuts. It was found that water deficit affected adversely certain biometric features investigated (plant height, number of nuts per cluster) and caused a decrease in seed weight per plant. It was also shown that water stress reduced the values of the investigated gas exchange parameters (photosynthesis rate, transpiration rate, intercellular-space CO2 concentration, and stomatal conductance) relative to the control treatment. Different soil moisture contents did not have a clear effect on fungal colonization of seeds. The multiplex PCR assays did not enable the detection of the genes responsible for mycotoxin synthesis. Under water deficit conditions, an increase was found in the content of albumin and globulin fractions as well as of glutelin fractions.
Źródło:
Acta Agrobotanica; 2010, 63, 1
0065-0951
2300-357X
Pojawia się w:
Acta Agrobotanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Technology for development of methane-hydrate deposits jointly with receiving fresh water
Autorzy:
Denysov, Y.
Klymenko, V.
Martynenko, V.
Rybicki, Cz.
Powiązania:
https://bibliotekanauki.pl/articles/298671.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
gas hydrates
gas hydrate deposit
methane
carbon dioxide
fresh water
exergy efficiency
economic efficiency
Opis:
The technology of development of bottom gas-hydrate deposits, which allows to receive fresh water simultaneously with methane, is presented. Principal schemes are presented and methods of operation of dualpurpose plants implementing this technology and described on the basis of the methods of gas production from methane hydrates that are most prepared for practical implementation: 1) injection of warm water into the well; 2) depressive effect on the deposit; 3) replacement of methane in hydrates with carbon dioxide injected into the reservoir. The magnitude of the decrease in temperature with the depression effect on the deposit is determined. It is shown that, the amount of fresh water obtained in dual-purpose plants operating with the replacement of methane in hydrates with carbon dioxide is proportional to the coefficient of the recycling rate of CO2. For the considered schemes of dual-purpose plants, processes of decomposition of methane hydrates in the gas-hydrate formation are analyzed, an exergic efficiency estimation is performed. Such installations. The economic efficiency of a single-purpose and dual-purpose gas-producing units operating according to an approved method of depression is considered. It is shown that the most effective are dual-purpose facilities operating using the method of methane replacement in hydrates with carbon dioxide, and the coefficients of economic efficiency of dual-purpose installations are at least 1.2 times higher than similar coefficients of single-purpose gas production facilities.
Źródło:
AGH Drilling, Oil, Gas; 2017, 34, 2; 531-542
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Abiotic mechanisms for biochar effects on soil N2O emission
Autorzy:
He, C.
Manevski, K.
Andersen, M.N.
Hu, C.
Dong, W.
Li, J.
Powiązania:
https://bibliotekanauki.pl/articles/2082642.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
gas diffusion
mitigation
nitrous oxide
water
filled pore space
Opis:
In this research, sterile soil columns with different contents of biochar made from apple-tree residues (0, 1 and 5% w/w) at three levels of water filled pore space (40, 60, and 80%) were set up in the laboratory to study nitrous oxide diffusion and binding processes. The results indicated that nitrous oxide emission can be effectively mitigated at 5% biochar regardless of soil water content. However, 1% biochar stimulated nitrous oxide diffusion compared to the other biochar treatments, which was opposite to expectations due to the stronger aeration than adsorption effect, while 0% had a suppression effect between 1 and 5%. Nitrous oxide emissions increased with increasing water filled pore space due to concomitantly decreasing biochar tortuousity at high water content. The increase of nitrogen from 1.11 to 1.50% on the biochar surface in the 5% treatment, and from 1.11 to 1.46% in the 100% biochar treatment, suggested that the main abiotic mechanisms for mitigation of nitrous oxide emission is adsorption and subsequent reactions with C = C bonds on appletree biochar surfaces since C = O and C-O bonds both increased and C=C/C-C/C-H declined.
Źródło:
International Agrophysics; 2019, 33, 4; 537-546
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mathematical model of gas-liquid-sand mixture separation in the four-phase separator of inertial type for subsea application
Autorzy:
Kopey, B. V.
Kryvonozhko, T. A.
Liakh, M. M.
Yuriev, E. V.
Powiązania:
https://bibliotekanauki.pl/articles/299239.pdf
Data publikacji:
2016
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
separator
four-phase
efficiency
subsea
oil
gas
water
sand
Opis:
In this article the construction and mathematical model of four-phase separator is realized, which is based on inertial separation mechanism of gas-liquid-sand mixture. Also we have put the problem on the basis of this model to obtain the dependence of separator efficiency on the parameters which play a crucial role in the technological process of separating gas-oil-water-sand mixture into a solid, liquid and a gas phase.
Źródło:
AGH Drilling, Oil, Gas; 2016, 33, 2; 361-377
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of water equivalents method to calculation of radiation recuperators with microfinned surface
Zastosowanie metody równoważników wodnych do obliczeń rekuperatorów radiacyjnych z mikroużebrowaniem
Autorzy:
Karczewski, K.
Powiązania:
https://bibliotekanauki.pl/articles/264139.pdf
Data publikacji:
2008
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
rekuperator
powierzchnia mikroużebrowana
liczba jednostek przepływu ciepła
równoważnik wodny powietrza
równoważnik wodny spalin
recuperator
microfinned surface
number of heat transfer units
water equivalent of air
water equivalent of furnace gas
Opis:
The calculation algorithm by water equivalents method to radiation recuperators with micro-finned surface were elaborated. In this algorithm model research of heat transfer and hydraulic resistance microfinned elements was applied. By elaborated algorithm radiation recuperator with microfinned surface to heat furnace were projected.
Według metody równoważników wodnych opracowano algorytm do obliczeń rekuperatorów radiacyjnych z mikroużebrowaniem. W algorytmie wykorzystano badania modelowe wymiany ciepła i oporów przepływu mikroużebrowanych elementów rekuperatorowych. Według opracowanego algorytmu zaprojektowano rekuperator radiacyjny z mikroużebrowaniem do pieca grzewczego.
Źródło:
Metallurgy and Foundry Engineering; 2008, 34, 1; 39-51
1230-2325
2300-8377
Pojawia się w:
Metallurgy and Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
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