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Wyświetlanie 1-15 z 121
Tytuł:
Przegląd konstrukcji zbiorników na gaz płynny LPG
Review construction of tanks for liquefied petroleum gas
Autorzy:
Kukiełka, K.
Kukiełka, L.
Geleta, K.
Cąkała, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/314311.pdf
Data publikacji:
2011
Wydawca:
Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:
LPG
zbiornik na gaz
gaz płynny
gas tank
liquid gas
Opis:
W artykule dokonano przeglądu konstrukcji zbiorników na gaz płynny LPG. Wyjaśniono ważniejsze pojęcia odnośnie instalacji gazowej. Pokazano różne rodzaje zbiorników toroidalnych na gaz płynny LP występujących w pojazdach samochodowych. Przedstawiono szczegółowy opis konstrukcyjny zbiornika toroidalnego i właściwości materiału wyjściowego do jego produkcji.
In the article were review construction of the tanks for liquefied petroleum gas. Explains more important concepts in gas installation. Shows the different types of toroidal tanks for liquid gas LPG in automotive vehicles. Presents a detailed description of the construction of the toroidal tank and the properties of the starting material to its production.
Źródło:
Autobusy : technika, eksploatacja, systemy transportowe; 2011, 12, 5; 234-239
1509-5878
2450-7725
Pojawia się w:
Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Komputerowe modelowanie i obliczenia wytrzymałościowe zbiorników na gaz płynny LPG
Computer modeling and strength calculations of the tanks for liquefied petroleum gas
Autorzy:
Kukiełka, L.
Kukiełka, K.
Geleta, K.
Cąkała, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/314315.pdf
Data publikacji:
2011
Wydawca:
Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:
LPG
zbiornik na gaz
gaz płynny
gas tank
liquid gas
Opis:
W artykule przedstawiono komputerowe modelowanie oraz wyniki obliczeń numerycznych metodą elementów skończonych w programie ABAQUS zbiorników toroidalnych do magazynowania gazów ciekłych LPG, jako specjalne wyposażenie do zasilania pojazdów samochodowych. Określono stany naprężeń, odkształceń i przemieszczeń w zbiorniku toroidalnym pełnym, który został poddany działaniu ciśnienia wewnętrznego o wartościach 2 MPa, 4 MPa, 6 MPa, 6,75 MPa.
In the article shows the computer modeling and numerical results of a calculation method of finite elements in ABAQUS toroidal tanks for storage of LPG, which is special equipment of motor vehicles fuelled with liquid gases. Determinate the stains of strains and stresses in the toroidal tank full, which has been subjected to internal pressure values 2 MPa, 4 MPa, 6 MPa, 6,75 MPa.
Źródło:
Autobusy : technika, eksploatacja, systemy transportowe; 2011, 12, 5; 227-233
1509-5878
2450-7725
Pojawia się w:
Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling the location and routing problem for the distribution of liquefied natural gas
Autorzy:
Chłopińska, Ewelina
Gucma, Maciej
Powiązania:
https://bibliotekanauki.pl/articles/320657.pdf
Data publikacji:
2019
Wydawca:
Polskie Forum Nawigacyjne
Tematy:
liquid natural gas
distribution
routing
Opis:
Programming methods, such as dynamic heuristic search or search and limit techniques are used for solving the problems of routing. Many of the problems to be solved require huge computing effort, some of them are NP-hard. Other optimization algorithms that may be used for solving vehicle routing problems are methods based on genetic algorithms, neural networks and ant algorithms. The problem of LNG distribution system is closely related to the problem of route planning. These problems are characterised by a simple definition of the problem, unlike finding the solution. Finding the optimal outcome for a great number of points is a hard and work-consuming task. Genetic algorithms are an alternative for the methods most often used so far.
Źródło:
Annual of Navigation; 2019, 26; 59-63
1640-8632
Pojawia się w:
Annual of Navigation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of new make-ups of surfactants for foam production
Autorzy:
Turitsyna, M. V.
Yakovlev, A. A.
Powiązania:
https://bibliotekanauki.pl/articles/298910.pdf
Data publikacji:
2012
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
drilling
productive layer
abnormally low pressure
well cleanout
liquid-gas mixtures
surfactants
Opis:
An analysis and estimation of deposits with zones of abnormally low formation pressure of a productive layer of the Perm region, Western and Eastern Siberia have been carried out. Some questions related to well cleanout with the use of liquid-gas mixtures have been considered. Some experiments with surfactants for producing foam have been conducted.
Źródło:
AGH Drilling, Oil, Gas; 2012, 29, 2; 389-393
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pomiar ilości gazu wydzielającego się z mas formierskich
Measurement of gas coming from moulding sands
Autorzy:
Rząsa, R. M.
Sawicki, A.
Powiązania:
https://bibliotekanauki.pl/articles/155265.pdf
Data publikacji:
2003
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
gas flow
optical method
gas-liquid flows
Opis:
W pracy przedstawiono przepływomierz do pomiaru bardzo małych przepływów gazu, rzędu kilku do kilkunastu ml/min. Metoda polega na zliczaniu małych objętości elementarnych gazu. Objętości elementarne są wytwarzane w postaci pęcherzyków gazu unoszących się w cieczy. Pomiar objętości pęcherzyków polega na prześwietlaniu pionowej kolumny jednorodną wiązką światła, a następnie detekcji strumienia świetlnego za pomocą układu detektorów światłowodowych. Detekcja polega na określaniu, w której części pola widzenia detektora znajduje się pęcherzyk, co stanowi informację o jego wymiarze. Następnie sygnały z detektorów są zamieniane na sygnały elektryczne w przetworniku pomiarowym, skąd są rejestrowane na komputerze.
Small the group of measurement in indrusty and laoratory contains measurement of gas flow. The measurement of gas capacity is generally marcing capacity of test pool. Because capacity types of gasses different methods and measurement devices are used. In the paper constructive solution of measurement flow-device for the measurement of the flow of gasses from a few to several ml/h was introduced. This method refers to counting a small amounts of elementary capacities of gas. Elementary capacities are produced in the shape of gas bubbles flowing in the liquid. Bubbles are produced by the help of nozzle placed in the bottom of measurement container which is fulfilled with liquids. The bubbles flowing is registered on the computer. Then, on this basis are their capacity is calculated and the sum of the capacity of the given unit of five is the basis for calculation of stream flow. Measurement of bubbles is the ray of vertical column whit light wave and then detection of the light way by the detectors. The detection of light ray is depicting the section of detector where the bubble is. The detector signals are changed on electric signals in interface from where they are registered on the computer. In this paper is presented detailed algorithm of measurement capacity and the gas flow and the results of the test are her presented.
Źródło:
Pomiary Automatyka Kontrola; 2003, R. 49, nr 6, 6; 24-27
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of raw liquid natural gas composition on combustion properties and emission characteristic
Autorzy:
Czyżewski, Paweł
Ślefarski, Rafał
Jójka, Joanna
Powiązania:
https://bibliotekanauki.pl/articles/2204069.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
toxic compounds
fuel flexibility
liquid natural gas
NO emission
Opis:
The article presents the results of numerical and analytical investigations of the influence of raw liquid natural gas (LNG) composition on parameters characterizing the combustion process. The high content of higher hydrocarbons influences the thermodynamic combustion process described with parameters like the adiabatic flame temperature, laminar flame speed and ignition delay time. A numerical study of the impact of LNG fuels on emission characteristics using the Cantera code has been performed. Results have shown that the change of grid natural gas to some types of liquid natural gas can result in an incomplete combustion process and an increase of emission of toxic compounds such as carbon monoxide and unburned hydrocarbons. For all investigated fuels the laminar flame speed rises by about 10% compared to natural gas, while the adiabatic flame temperature is nearly the same. The ignition delay time is decreased with an increase of ethane share in the fuel. The analysis of chemical pathways has shown that hydrogen cyanide and hydrogen formation is present, particularly in the high temperature combustion regimes, which results in an increase of nitric oxide molar fraction in flue gases by even 10% compared to natural gas. To summarize, for some applications, liquid natural gases cannot be directly used as interchangeable fuels in an industry sector, even if they meet the legal requirements.
Źródło:
Archives of Thermodynamics; 2023, 44, 1; 3--21
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical Simulation of Emergency Release of Liquid Petroleum Gas on a Car Gas Station
Autorzy:
Salamonowicz, Zdzisław
Majder-Łopatka, Malgorzata
Dmochowska, Anna
Piechota-Polańczyk, Aleksandra
Polańczyk, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/2069924.pdf
Data publikacji:
2021
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
gas emergency release
liquid petroleum gas
CFD simulation
atmospheric stability class
Opis:
LPG storage tanks may be seriously threatened by a fire coming from nearby fuels or by leakage appearance. The aim of the study was to prepare a three-dimensional model of LPG release on a car gas station under different environmental conditions. CFD simulations of liquid and gas phase release from a tank localized on a car gas station was performed. First, ALOHA software was applied to determine mass flow rate, while Ansys software was used to determine the shape and size of hazardous zone. To reflect real condition atmospheric stability classes were applied. It was observed that for classes A-D the hazardous zone was decreasing. While, for E and F class the range was increased. It was noticed that the location of the leakage affects the extent of the danger zone. For the leaking below the liquid surface analyzed LPG has liquid form. While, for the leaking above the liquid surface analyzed LPG has gas form. Furthermore, for liquid leakage the largest hazard zone of release was observed.
Źródło:
Rocznik Ochrona Środowiska; 2021, 23; 65--77
1506-218X
Pojawia się w:
Rocznik Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Aspects of using LNG as a marine fuel
Autorzy:
Herdzik, J.
Powiązania:
https://bibliotekanauki.pl/articles/247852.pdf
Data publikacji:
2012
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
marine fuel
ships propulsion
LNG
liquid natural gas
atmosphere protection
Opis:
The paper presents a probe of LNG usage analysis as a marine fuel. The restrictions of harmful substances emission to atmosphere from marine engines, especially in controlled emission areas (ECA and SECA areas) of nitrogen oxides and sulfur oxides, forces the engine makers to use additional installations, which operation may fulfill the cleanness requirements of exhaust gases. The option is a usage such marine fuels which fulfill the requirements without any cleaning processes. Such fuels are gaseous fuels, especially liquid natural gas (LNG) or compressed natural gas (CNG). It was undertaken many tests for determination the conditions of safety bunkering, storage on board, preparation and supplying the fuel to the engine and realization of working process. About dozens merchant ships were applied LNG as a fuel. There is enough experience for spreading the LNG usage. The basic problem is still the limited network of LNG distribution in ports. The next one is the conviction of ship-owners that is no return from transition to the LNG or CNG fuelling. In the end it may occurred to the double beneficial situation that the fuel costs would be decreasing and simultaneously the improvement of exhaust gases quality (the restriction of negative effects for the natural environment).
Źródło:
Journal of KONES; 2012, 19, 2; 201-209
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ wielkości i kształtów otworów na wartość współczynnika wypływu mieszanin dwufazowych ciecz - gaz ze zbiornika
Influence of size and shape of orifices on a discharge coefficient value for two-phase gas - liquid mixture outflow from a vessel
Autorzy:
Dziubiński, M.
Przelazły, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/2070806.pdf
Data publikacji:
2009
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
mieszanina dwufazowa ciecz-gaz
ciecz newtonowska
ciecz nienewtonowska
współczynnik wypływu
liquid-gas two-phase mixture
Newtonian liquid
non-Newtonian liquid
discharge coefficient
Opis:
W niniejszym artykule przedstawiono wyniki badań dotyczące wypływu mieszanin dwufazowych ciecz — gaz ze zbiornika przez otwory o nieregularnych kształtach. Uzyskany szeroki zakres danych eksperymentalnych opisano oryginalnymi równaniami korelacyjnymi i przedstawiono w postaci zależności φ = f(Re).
Experimental investigation results of two-phase gas - liquid mixture discharge through irregularly shape orifices from a vessel are presented in the paper. A wide range of experimental data were correlated using original correlation equations and presented in a form of dependence φ = f(Re).
Źródło:
Inżynieria i Aparatura Chemiczna; 2009, 6; 57-59
0368-0827
Pojawia się w:
Inżynieria i Aparatura Chemiczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physicochemical mechanisms of mineral nanoparticles effects on pulmonary gas/liquid interface studied in model systems
Autorzy:
Kondej, D.
Sosnowski, T. R.
Powiązania:
https://bibliotekanauki.pl/articles/110409.pdf
Data publikacji:
2014
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
inhalation
nanoparticles
gas-liquid interface
dynamic surface tension
Opis:
Inhaled mineral nanoparticles which are deposited on the lung surface may influence the gas/liquid barrier and the pulmonary surfactant (PS) which constitutes the vital element of the respiratory system. This research is focused on the physicochemical effects caused by selected clay nanoparticles (bentonite, halloysite, montmorillonites) interacting with PS and changing its original surface activity. Using three measuring methods (pulsating bubble technique, Langmuir balance and drop shape analysis), we demonstrated the influence of different mineral nanoparticles on the dynamic surface tension of animal-derived PS material (Survanta®) and main surfactant phospholipid (DPPC). The results which are dependent on material properties and concentration allow to hypothesize possible pathways of health effects from inhalation of mineral nanoparticles. This may help to set the guidelines in defining occupational safety standards and methods of protection of the respiratory system against inhaled mineral dusts.
Źródło:
Physicochemical Problems of Mineral Processing; 2014, 50, 1; 57-69
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Absorption of CO2 into perfluorinated gas carrier in the Taylor gas–liquid flow in a microchannel system
Autorzy:
Sobieszuk, P.
Pilarek, M.
Powiązania:
https://bibliotekanauki.pl/articles/185397.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
perfluorodecalin (PFD)
liquid gas carrier
solubility
Taylor flow
microreactor
perfluorodekalina (PFD)
gaz ciekły
rozpuszczalność
przepływ Taylora
mikroreaktor
Opis:
The aim of this study was to determine the solubility of CO2 in perfluorodecalin (PFD) which is frequently used as efficient liquid carrier of respiratory gases in bioprocess engineering. The application of perfluorinated liquid in a microsystem has been presented. Gas-liquid mass transfer during Taylor (slug) flow in a microchannel of circular cross section 0.4 mm in diameter has been investigated. A physicochemical system of the absorption of CO2 from the CO2/N2 mixture in perfluorodecalin has been applied. The Henry’s law constants have been found according to two theoretical approaches: physical (H = 1.22x10-3 mol/m3Pa) or chemical (H = 1.26x10-3 mol/m3Pa) absorption. We are hypothesising that the gas-liquid microchannel system is applicable to determine the solubility of respiratory gases in perfluorinated liquids.
Źródło:
Chemical and Process Engineering; 2012, 33, 4; 595-602
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Liquid Perfluorochemicals as Flexible and Efficient Gas Carriers Applied in Bioprocess Engineering: An Updated Overview and Future Prospects
Autorzy:
Pilarek, M.
Powiązania:
https://bibliotekanauki.pl/articles/185200.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
ciecz perfluorochemiczna
fluorowęgiel
gaz ciekły
rozpuszczalność
hybrydowy system hodowli
liquid perfluorochemical
fluorocarbon
liquid gas carrier
solubility
cell/tissue culture
hybrid culture system
Opis:
Fully synthetic, biochemically inert and water-immiscible liquid perfluorochemicals (PFCs) are recognised as flexible liquid carriers/scavengers of gaseous compounds (respiratory gases mainly, i.e. O2 and CO2) and increasingly applied in bioprocess engineering. A range of unmatched physicochemical properties of liquid PFCs, i.e. outstanding chemo- and thermostability, extremely low surface tension, simultaneous hydro- and lipophobicity, which result from carbon chain substitution with fluorine atoms (the most electronegative chemical element) and the presence of intramolecular C–F bonds (the strongest single bond known in organic chemistry) have been described in detail. Exceptional propensity to solubility of respiratory gases in liquid perfluorinated compounds has been widely discussed. Advantages and disadvantages of bioprocess applications of liquid PFCs in the form of a pure PFC as well as in an emulsified form have been pointed out. A liquid PFC-mediated mass transfer intensification in various types of microbial, plant cell and animal cell culture systems: from miniaturised microlitre-scale cultures, via biomaterial-based scaffolds containing culture systems, to litre-scale bioreactors, has been reviewed and elaborated on bearing in mind the benefits of bioprocesses.
Źródło:
Chemical and Process Engineering; 2014, 35, 4; 463-487
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Deposition of a polymeric porous superhydrophobic thin layer on the surface of poly(vinylidenefluoride) hollow fiber membrane
Autorzy:
Ahmad, A. L.
Mohammed, H. N.
Ooi, B. S.
Leo, C. P.
Powiązania:
https://bibliotekanauki.pl/articles/778912.pdf
Data publikacji:
2013
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
Superhydrophobic layer
PVDF
Gas-liquid contactor
CO2
porous
Opis:
Porous superhydrophobic layer of low-density polyethylene (LDPE) was created by a simple approach on the Poly(vinylidenefluoride) (PVDF) hollow fiber membranes. Acetone and ethanol mixtures with different volume ratios were used as the non-solvent on the coating surface. A 5:1 (v/v) acetone/ethanol ratio provided a porous surface with a 152° ± 3.2 water contact angle. The high contact angle could reduce membrane wettability for better carbon dioxide capture when the membrane was used as gas-liquid contactor in absorption processes. To assess the effect of the created superhydrophobic layer, the pristine and modified membranes were tested in a CO2 absorption system for ten days. The results revealed that the absorption flux in the modified membrane was higher than that of pristine membrane.
Źródło:
Polish Journal of Chemical Technology; 2013, 15, 3; 1-6
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling of a hybrid culture system with a stationary layer of liquid perfluorochemical applied as oxygen carrier
Autorzy:
Pilarek, M.
Dąbkowska, K.
Powiązania:
https://bibliotekanauki.pl/articles/185054.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
liquid perfluorochemical (fluorocarbon)
liquid gas carrier
mathematical modelling
cell/tissue culture
hybrid culture system
ciecz perfluorochemiczna (fluorowęglowa)
gaz ciekły
modelowanie matematyczne
hybrydowy system hodowli
Opis:
A mathematical model of a hybrid culture system supported with a stationary layer of liquid perfluorochemical (PFC) as a source of O2 for cells which grow in the aqueous phase of culture medium has been developed and discussed. The two-substrate Monod kinetics without inhibition effects, i.e. the Tsao-Hanson equation, has been assumed to characterise the biomass growth. The Damköhler number which relates the growth rate to the mass transfer effects has been used to appraise the regime (i.e. diffusion-limited or kinetics) of the whole process. The proposed model predicted accurately previously published data on the submerged batch cultures of Nicotiana tabacum BY-2 heterotrophic cells performed in a culture system supported with a stationary layer of hydrophobic perfluorodecalin as a liquid O2 carrier. Estimated values of the parameters of the model showed that the process proceeded in the kinetics regime and the growth kinetics, not the effects of the mass transfer between aqueous phase and liquid PFC, had essential influence on the growth of biomass.
Źródło:
Chemical and Process Engineering; 2016, 37, 1; 149-158
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Calculation of salt basin depth using fluid inclusions in halite from the Ordovician Ordos Basin in China
Autorzy:
Galamay, Аnatolіy R.
Meng, Fanwei
Bukowski, Krzysztof
Lyubchak, Aleksandr
Zhang, Yongsheng
Ni, Pei
Powiązania:
https://bibliotekanauki.pl/articles/2058592.pdf
Data publikacji:
2019
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
halite
gas-liquid inclusion
brine depth
Ordos Basin
Ordovician evaporate
Opis:
During the Middle Ordovician, the salt deposits of the Majiagou Formation of the Ordos Basin in North China formed, the halite including various genetic types of fluid inclusion. In this study, fit-testing of primary inclusions was performed to reconstruct the physical and chemical conditions during original halite sedimentation. During the post-sedimentation stage, salt was subjected to elevated temperatures (62-70°C) and pressures of tens of megapascals. From these measurements and mathematical calculations, the gas pressure was identified in the primary fluid inclusions, which allowed us to estimate that the brine column thickness in the salt basin was approximately 40 m.
Źródło:
Geological Quarterly; 2019, 63, 3; 619--628
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
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