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Tytuł:
Conradowskie Zwierciadło morza, czyli glosa do nowoczesności
Joseph Conrad’s The Mirror of The Sea: A Gloss Over Modernity
Autorzy:
Wojciechowska, Sylwia J.
Powiązania:
https://bibliotekanauki.pl/articles/37548338.pdf
Data publikacji:
2024
Wydawca:
Akademia Ignatianum w Krakowie
Tematy:
płynna nowoczesność
akceleracja
postęp technologiczny
nowa biografistyka
autobiografia modernistyczna
liquid modernity
acceleration
technological revolution
modernist autobiography
the new biography
Opis:
Bogata spuścizna Josepha Conrada obejmuje wiele gatunków literackich, na których tle Zwierciadło morza wyróżnia się zarówno pod względem nietypowej formy, jak i treści. Pomimo niezwykłej popularności, jaką cieszyło się pierwsze wydanie Zwierciadła morza, utwór ten należy dziś do mniej znanych dzieł pisarza i zazwyczaj analizowany jest głównie pod względem formalnym jako przykład wczesnomodernistycznej autobiografii. Poniższy artykuł podejmuje próbę interpretacji nie formy, a przesłania zawartego w dygresjach o zmianach z przełomu XIX i XX w., których pierwsze symptomy zauważył Conrad. Obierając teorię „płynnej nowoczesności” sformułowaną przez Zygmunta Baumana za istotny punkt odniesienia dla podjętych rozważań, dowodzę, iż Zwierciadło morza można odczytać jako zapis doświadczenia przejścia ku nowej rzeczywistości, u której podstaw leży redefinicja czasoprzestrzeni. Namysł nad czasem i jego postrzeganiem stanowi punkt wyjścia dla przedstawionej poniżej interpretacji Conradowskiego Zwierciadła morza, którego spektrum rozważań najwyraźniej wybiega poza zainteresowania autobiografii jednostki: czerpiąc z bogactwa własnych wspomnień, jego autor formułuje refleksję na temat re-definicji czasu i przestrzeni. Takie odczytanie Zwierciadła morza pozwala uznać ten tekst za cenny komentarz do procesów zachodzących w obrębie percepcji czasu w dobie nowoczesności.
The Mirror of the Sea does not exactly belong within the innermost circle of Joseph Conrad’s literary legacy. Even though it met with an immediate success upon its publication, today it mainly attracts critical attention on the merit of its intricate form rather than as a commentary on technology and progress. By contrast, this article is focused upon the content of certain side notes, digressions, and implications exhibiting a stable juxtaposition of the past with the present. With Zygmunt Bauman’s theory of liquid modernity as a theoretical backdrop, the paper argues that The Mirror of the Sea gives expression to the processes of acceleration that became perspicuous at the turn of the 19th and 20th centuries. Apparently, a re-definition of the relation between time and space followed in the footsteps of the technological advances, which seems to be a central issue in The Mirror of the Sea. Hence, the early-modernist autobiography appears as a valuable commentary upon the changing notion of time at that outset of modernity.
Źródło:
Perspektywy Kultury; 2024, 45, 2; 139-152
2081-1446
2719-8014
Pojawia się w:
Perspektywy Kultury
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rediscovering Christian Culture and Spirituality in the Fluid Reality of Europe
Odkrywanie na nowo chrześcijańskiej kultury i duchowości w płynnej rzeczywistości Europy
Autorzy:
Napiórkowski, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/28394763.pdf
Data publikacji:
2024
Wydawca:
Uniwersytet Kardynała Stefana Wyszyńskiego w Warszawie
Tematy:
chrześcijaństwo
duchowość
kultura
płynna nowoczesność
Europa
postmodernizm
Christianity
spirituality
culture
liquid modernity
Europe
postmodernism
Opis:
This article points to the plight of man in the 21st century and his intimidating spiritual and axiological confusion. The 2020 COVID pandemic, the 2022 war in Ukraine and high economic inflation have exposed the lack of stable ethical values and lasting references for Europe. On the one hand, many EU citizens live today in uncertainty and fear, falling in line with populist slogans, and on the other hand, strong xenophobic and fundamentalist currents have emerged in the Catholic Church. Europe is arguably not so much in need of a return to over-institutionalized Christianity, but rather of a search for new forms and systems that would express the ideas of Jesus of Nazareth in innovative ways. Postmodernity with its characteristic elements, i.e., pluralization, mercantilization and rapid change, seem to be completely incompatible with the conventionally accepted Christian understanding of God, the concept of man and the world around him. Therefore, this is a great challenge to all Christian theologians.
Niniejszy artykuł wskazuje na trudną sytuację człowieka w XXI wieku i jego poważne zagubienie duchowe i aksjologiczne. Pandemia COVID w 2020 r., wojna na Ukrainie w 2022 r. oraz wysoka inflacja gospodarcza obnażyły brak stabilnych wartości etycznych i trwałych odniesień dla tej części świata. Z jednej strony wielu obywateli Unii Europejskiej żyje dziś w niepewności i strachu, ulegając demagogicznym hasłom, a z drugiej w Kościele katolickim pojawiły się silne prądy populistyczne i fundamentalistyczne. Wydaje się, że współczesna Europa potrzebuje nie tyle powrotu do nadmiernie zinstytucjonalizowanych form chrześcijaństwa, co poszukiwania nowych form i systemów, które trafniej wyrażałyby idee Jezusa z Nazaretu człowiekowi epoki Internetu. Ponowoczesność, ze swoimi formami pluralizacji, merkantylizacji i szybkich zmian, nie trzyma się już ani konwencjonalnego chrześcijańskiego obrazu Boga, ani wypływającej z niego koncepcji człowieka czy natury. Dlatego jest to wielkie wyzwanie dla wszystkich teologów chrześcijańskich.
Źródło:
Collectanea Theologica; 2024, 94, 1; 167-186
0137-6985
2720-1481
Pojawia się w:
Collectanea Theologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Alternatives to zinc oxide in pig production
Autorzy:
Pejsak, Z.
Kaźmierczak, P.
Butkiewicz, A.F.
Wojciechowski, J.
Woźniakowski, G.
Powiązania:
https://bibliotekanauki.pl/articles/16648009.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
zinc oxide
alternatives
probiotics
organic acids
liquid feeding
bacteriophages
Opis:
Zinc oxide (ZnO) has been applied for many years in the production of pigs to reduce the number of diarrhoea in weaned piglets. In June 2022, the European Union banned the use of zinc oxide (ZnO) in pig feed. According to scientific reports, the may reason was the accumulation of this microelement in the environment of pig production. It has been shown that frequent application of ZnO can lead to increased antibiotic resistance in pathogenic swine microflora. The main alternatives to ZnO are probiotics, prebiotics, organic acids, essential oils, and liquid feeding systems. Alternatives to ZnO can be successfully used in pig production to reduce the number of diarrhoea among piglets during the postweaning period. Additional reports indicated that bacteriophage supplementation has a positive effect on the health of pigs. The article provides an overview of current ZnO substitutes that can be used in pig farming.
Źródło:
Polish Journal of Veterinary Sciences; 2023, 26, 2; 319-330
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of fuel cold energy in CO2 BOG reliquefaction system on ammonia-powered CO2 carrier
Autorzy:
Lin, Yiqun
Lu, Jie
Li, Boyang
Li, Yajing
Yang, Qingyong
Powiązania:
https://bibliotekanauki.pl/articles/34608726.pdf
Data publikacji:
2023
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
mmonia-powered CO2 carrier
liquid ammonia cold energy
CO2 BOG
reliquefaction system
Aspen HYSYS
Opis:
A CO2 boiled off gas (CO2 BOG) reliquefaction system using liquid ammonia cold energy is designed to solve the problems of fuel cold energy waste and the large power consumption of the compressor in the process of CO2 BOG reliquefaction on an ammonia-powered CO2 carrier. Aspen HYSYS is used to simulate the calculation, and it is found that the system has lower power consumption than the existing reliquefaction method. The temperature of the heat exchanger heater-1 heat flow outlet node (node C-4) is optimised, and it is found that, with the increase of the node C-4 temperature, the power consumption of the compressor gradually increases, and the liquefaction fraction of CO2 BOG gradually decreases. Under 85% conditions, when the ambient temperature is 0°C and the temperature of node C-4 is -9°C, the liquid fraction of CO2 BOG reaches the maximum, which is 74.46%, and the power of Compressor-1 is the minimum, which is 40.90 kW. According to this, the optimum temperature of node C-4 under various working conditions is determined. The exergy efficiency model is established, in an 85% ship working condition with the ambient temperature of 40°C, and the exergy efficiency of the system is the maximum, reaching 59.58%. Therefore, the CO2 BOG reliquefaction system proposed in this study could realise effective utilisation of liquid ammonia cold energy.
Źródło:
Polish Maritime Research; 2023, 3; 22-34
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Asymptotically optimal algorithm for processing side radiation signals from monitor screens on liquid crystal structures
Asymptotycznie optymalny algorytm przetwarzania sygnałów promieniowania bocznego z ekranów monitorów LCD
Autorzy:
Yevgrafov, Dmytro V.
Yaremchuk, Yurii Ye.
Powiązania:
https://bibliotekanauki.pl/articles/28875037.pdf
Data publikacji:
2023
Wydawca:
Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
Tematy:
side electromagnetic radiation and guidance
video card signals
liquid crystalstructures
spectra of signals
boczne promieniowanie elektromagnetyczne
przesłuchy
sygnały z kart graficznych
struktury ciekłokrystaliczne
widma sygnałów
Opis:
An asymptotically optimal compatible algorithm for detecting side radiation signals from the monitor screen on liquid crystalstructuresand estimating the duration of image immutability on the monitor screen is found, which will better intercept information from monitor screens.The structure of a special technical intelligence tool is justified as a maximum likelihood algorithm for a finite number of unknown quadrature amplitudes of the information leakage signal from the monitor screen on liquid crystal structures.
Znaleziono asymptotycznie optymalny wspólny algorytm wykrywania sygnałów promieniowania bocznego z ekranu monitora na strukturach ciekłokrystalicznych i szacowania czasu trwania niezmienności obrazu na ekranie monitora, który w najlepszy sposób przechwyci informacje z ekranów monitorów. Struktura specjalnego narzędzia wywiadu technicznego jest uzasadniona jako algorytm maksymalnego prawdopodobieństwa dla skończonej liczby nieznanych kwadraturowych amplitud sygnału wycieku informacji z ekranu monitora na strukturach ciekłokrystalicznych.
Źródło:
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska; 2023, 13, 4; 99--102
2083-0157
2391-6761
Pojawia się w:
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Benefits and Risks of Liquid Sewage Sludge Recycling in Agricultural Spreading – A Case Study of WWTP of Skhirat, Morocco
Autorzy:
Achkir, Abdelmajid
Aouragh, Abdelhakim
El Mahi, Mohammed
Lotfi, El Mostapha
Kabriti, Mohamed
Abid, Abdesalam
El Moussaoui, Tawfik
Yagoubi, Maâmar
Powiązania:
https://bibliotekanauki.pl/articles/2202347.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
sewage sludge
WWTP
wastewater treatment plant
Skhirat
Morocco
liquid sludge
physicochemical parameter
bacteriological parameter
heavy metals
agricultural
Opis:
The sewage sludge recycling as an agricultural land resource has received a great deal of attention worldwide. This practice has highly increased because of ever-increasing municipal wastewater production and the awareness of its fertilizing potential as amendment resources. However, there is a concern about land spreading linked mainly to health associated risks due to the presence of diverse pollutants. Thus, sewage spreading management is a key factor the guarantees benefits and avoids risks. The present work aimed to investigate the benefits and risks of sewage sludge (SS) application on agricultural land. To this end, physicochemical main parameters and bacteriological indicators, fecal coliform (FC) and fecal streptococcus (FS), of the sewage sludge generated form WWTP of Skhirat, Morocco, were performed during the period 2018–2019. The obtained results of physicochemical parameters reveal high concentration of organic matter in SS, which reach 96.3 mg/l, and in nutrients. Indeed, total Kjeldahl nitrogen TKN reaches a maximum of 3791 mg/l, potassium K+ reaches 58.71 mg/l. In addition, the average content of FC and FS are around 5.40 CFU/ml and 5.85 CFU/ml, respectively, whereas total phosphorus reaches 508.25 mg/l. In addition, concentrations of micronutrients such as Cl-, SO42-, Ca2+, Mg2+, and Na+ were high, which is interesting and could benefit for both soils and plant. Furthermore, this sewage sludge contains high concentration of heavy metals, mainly zinc and copper which could limit reuse in land spreading. The obtained results were compared to the applied standards and directives established within the framework of the agricultural spreading.
Źródło:
Journal of Ecological Engineering; 2023, 24, 1; 277--288
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chlorpyrifos Removal from Aqueous Solutions by Emulsion Liquid Membrane: Stability, Extraction, and Stripping Studies
Autorzy:
Al-Damluji, Farrah Emad
Mohammed, Ahmed A.
Powiązania:
https://bibliotekanauki.pl/articles/2202325.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
emulsion liquid membrane
chlorpyrifos
emulsion droplet size
stability
mass transfer coefficient
extraction efficiency
Opis:
The current paper focuses on assessing key parameters affecting the extraction of Chlorpyrifos as well as emulsion stability using the emulsion liquid membrane technology. Five parameters affecting the extraction have been studied: homogenizer speed, emulsification time, agitating time, surfactant concentration, and stripping phase concentration taking into consideration the emulsion breaking. Experiments proved that using the resulting optimum values will maximize both extraction and stripping efficiencies (93.8% and 94.7% respectively), while minimizing the emulsion breakage (increasing the stability of emulsion) to 0.73% with no need to employ a carrier agent. A 10 min agitating time, 3% (v/v) Span 80 as a surfactant, 12700-rpm homogenizer speed, 0.25 M HCl as an internal phase concentration, and 5 min emulsification time are chosen to be the optimum parameters’ values. A study of extraction kinetics and estimation of mass transfer coefficient was also accomplished (3.89×10-9m/s). The conclusions of this work can be extended to the removal of other types of pesticides from water.
Źródło:
Journal of Ecological Engineering; 2023, 24, 2; 101--111
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Everything flows... On the role of knowledge sources and the significance of comparative research in the modern world
Autorzy:
Rzyska, Aleksandra
Powiązania:
https://bibliotekanauki.pl/articles/36219243.pdf
Data publikacji:
2023-10-03
Wydawca:
Wydawnictwo Naukowe Chrześcijańskiej Akademii Teologicznej w Warszawie
Tematy:
comparative education
pedagogical comparativism
role of the researcher
knowledge
revolution in information technology
artificial intelligence
liquid modernity
Opis:
Contemporary changes in the socio-cultural reality, associated with the revolution in the field of information and the development of new technologies, provide a context for reflection on the problem of the sources of knowledge. The wide access to resources of various data, information and knowledge, related nowadays, in particular, to questions about the manners and limits of using artificial intelligence (AI) at the borderlines of science and education, provokes reflection on the role of contemporary science and its representatives. The reflections are undertaken from the perspective of comparative education, which is treated as a scientific discipline that studies different materials (sources) and constitutes also a field (source) of knowledge. The text presents three aspects of reflection: the origins and development of pedagogical comparativism; its contemporary opportunities and challenges; and the role of the researcher embedded in a vision of the future. Comparative education is presented as the discipline which, through actions and works of comparativists, establishes the value of progress and continuity as inherent developmental forces in culture.
Źródło:
Studia z Teorii Wychowania; 2023, XIV(3 (44)); 303-317
2083-0998
2719-4078
Pojawia się w:
Studia z Teorii Wychowania
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Extraction of rubidium ion from brine solutions by dicyclohexano-18-crown-6 / ionic liquid system
Autorzy:
Huang, Dongfang
Ma, Guixiang
Lv, Peng
Zhou, Quanbao
Powiązania:
https://bibliotekanauki.pl/articles/2204138.pdf
Data publikacji:
2023
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
Rubidium
Ionic liquid
Dicyclohexano-18-crown-6
Solvent extraction
Opis:
Separation among rubidium and potassium ions from salt lake brines remains challenging. In this work, a typical room temperature ionic liquid 1-ethyl-3-metyhlimidazaolium bis(trifluoromethylsulfonyl)imide ([C2mim+][NTf2-]) was used as diluent and synergistic extractant, dicyclohexano-18-crown-6 (DCH18C6) was used as extractant to extract rubidium ions from brine solutions which contain high concentrations of potassium ions was investigated. Under the optimal conditions, the single extraction efficiency of rubidium ions was up 93.63%. The thermodynamic parameters of the rubidium ion extraction were obtained. Based on the slope analysis method, the extracted species in the organic phase were ascertained as 1:1 complex. UV-visible has been performed to investigate the ion concentration of ionic liquid before and after the interaction of metal ions and ligands. Rubidium ions in [Rb · DCH18C6]+ complex were stripped by 2.5 mol · L–1 NH4NO3. The extraction system offers high efficiency, simplicity and environmentally friendly application prospect to separate rubidium from brine solutions.
Źródło:
Polish Journal of Chemical Technology; 2023, 25, 1; 61--68
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fuel recovery from plastic and organic wastes with the help of mineralogical catalysts
Autorzy:
Sarıkap, Mehmet Can
Çebi, Fatma Hoş
Powiązania:
https://bibliotekanauki.pl/articles/27311565.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
geologic catalyst
clinoptilolite
plastic waste
organic waste
liquid fuel
Opis:
Plastics are one of the most widely used materials, and, in most cases, they are designed to have long life spans. Since plastic and packaging waste pollute the environment for many years, their disposal is of great importance for the environment and human health. In this paper, a system was developed to store liquid fuel from plastic and organic waste mixes without solidification, which then can be used as fuel in motor vehicles and construction machinery. For this purpose, polyethylene terephthalate (PET), polyvinyl chloride (PVC), and organic wastes and clay, zeolite, and MCS23-code materials (50% magnetite-%25 calcium oxide-%25 sodium chloride) were heated in a closed medium at temperatures ranging from 300 to 400°C and subsequently re-condensed. The study conducted twenty tests, involving various types and rates of plastic and organic materials, as well as different rates of catalysts. Among these tests, the highest liquid fuel yield (67.47%) was achieved in Test 9, where 50% PVC50% PET waste, 75 g of clinoptilolite, and 500 g of MCS23 waste were collectively used. Notably, Test 12 exhibited the highest density value (79.8 kg/m3), while the best viscosity value (2.794 mm2/s) was observed in Test 2. Across all samples, flash point values were found to be below 40°C. The most favorable yield point value was recorded in Test 2 (-6°C). The samples displayed ash content within the range of 0 to 0.01% (m/m)] and combustion heat values of 35.000> J/g which fall within the standard range. The incorporation of MCS23 with clinoptilolite additives is believed to have a significant impact on obtaining high-yield products with improved fuel properties.
Źródło:
Archives of Environmental Protection; 2023, 49, 3; 16--25
2083-4772
2083-4810
Pojawia się w:
Archives of Environmental Protection
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:
Impact of Sulfate in the Sand on the Absorption and Density of Metakaolin-Based Geopolymer Mortar
Autorzy:
Thamer, Sara Yahya
Al-Jaberi, Layth Abdulbari
Powiązania:
https://bibliotekanauki.pl/articles/2202341.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
geopolymer
sulfate
molarity
alkaline liquid
absorption
Opis:
The advancement of cement alternatives in the construction materials field is fundamental to sustainable development. Geopolymer is the optimal substitute for ordinary portland cement, which produces 80% less CO2 emissions. Metakaolin was used as one of the raw materials in the geopolymerization process. This research examined the influence of three different percentages of sulfate (0.00038, 1.532, and 16.24)% in sand per molarity of NaOH on the absorption and density of metakaolin-based geopolymer mortar (MK-GPM). Samples were prepared with two different molarities (8M and 12M) and cured at room temperature. The best results obtained for geopolymer mortar in the absorption and density test were (3.89%) and (2280 kg/m3), respectively, recorded with 12M with the lowest sulfate content (0.00038%) at 90 days. Moreover, it has been observed that the absorption percentage increased along with sulfate content in the sand, and an inverse relationship was recorded between the increasing sulfate percentages in the sand and density values of (MK-GPM).
Źródło:
Journal of Ecological Engineering; 2023, 24, 1; 328--335
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of the efficiency of a dual-fuel gas turbine combustion chamber with a plasma‒chemical element
Autorzy:
Serbin, Serhiy
Diasamidze, Badri
Dzida, Marek
Chen, Daifen
Powiązania:
https://bibliotekanauki.pl/articles/32921246.pdf
Data publikacji:
2023
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
gas turbine engine
power plant
dual-fuel combustion
combustion chamber
liquid fuel
gaseous fuel
plasma-assisted combustion
Opis:
The study is devoted to the possibility of increasing the efficiency of the working process in dual-fuel combustion chambers of gas turbine engines for FPSO vessels. For the first time, it is proposed to use the advantages of plasma‒chemical intensification of the combustion of hydrocarbon fuels in the dual-fuel combustion chambers, which can simultaneously operate on gaseous and liquid fuels. A design scheme of a combustion chamber with a plasma‒chemical element is proposed. A continuous type mathematical model of a combustion chamber with a plasma‒chemical element has been developed, which is based on the solution of a system of differential equations describing the processes of chemical reactions in a turbulent system, taking into consideration the initiating effect of the products of plasma‒chemical reactions on the processes of flame propagation. A modified six-stage kinetic scheme of hydrocarbon oxidation was used to simultaneously predict the combustion characteristics of the gaseous and liquid fuels, taking into account the decrease in the activation energy of carbon monoxide oxidation reactions when the products of the plasma‒chemical element are added. The results reveal that the addition of plasma‒chemical products significantly reduces CO emissions in the outlet section of the flame tube (from 25‒28 ppm to 3.9‒4.6 ppm), while the emission of nitrogen oxides remains practically unchanged for the studied combustion chamber. Further research directions are proposed to enhance the working process efficiency of a dual-fuel combustion chamber for gas turbine engines as part of the power plant of FSPO vessels.
Źródło:
Polish Maritime Research; 2023, 2; 68-75
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Moisture transport in knitted fabrics
Transport wilgoci w dzianinach
Autorzy:
Matusiak, Małgorzata
Sukhbat, Otgonsuren
Powiązania:
https://bibliotekanauki.pl/articles/27324232.pdf
Data publikacji:
2023
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Skórzanego
Tematy:
knitted fabric
clothing
physiological comfort
Permetest
sweat
water vapor permeability
liquid transport
dzianina
odzież
komfort fizjologiczny
pot
przepuszczalność pary wodnej
transport cieczy
Opis:
Knitted fabrics are often used in clothing worn next to the skin. Therefore, they are expected to be characterized by excellent properties affecting the physiological comfort of clothing usage, especially the ability to wick away sweat. As part of the work, tests were carried out on 5 variants of knitted fabrics in terms of the ability to transport sweat in the form of vapor and liquid. The tests were performed using Permetest and Moisture Management Tester M290. It was found that all knitted fabrics were characterized by very good water-vapor permeability. The transport of liquid moisture in knitted fabrics varied depending on the raw material composition of the knitted fabrics. The best ability to transport liquid moisture was found in a knitted fabric made of a 54% cotton/46% polyester blend.
Dzianiny często stosowane są w odzieży noszonej bezpośrednio przy skórze. Dlatego oczekuje się, że będą one charakteryzowały się bardzo dobrymi właściwościami wpływającymi na komfort fizjologiczny użytkowania odzieży, zwłaszcza zdolnością odprowadzania potu. W ramach pracy przeprowadzono badania 5 wariantów dzianin w zakresie zdolności do transportu potu w postaci pary oraz płynu. Badania wykonano za pomocą przyrządów Permetest i Moisture Management Tester M290. Stwierdzono, że wszystkie dzianiny charakteryzowały się bardzo dobrą przepuszczalnością pary wodnej. Transport płynnej wilgoci w dzianinach był zróżnicowany w zależności od składu surowcowego dzianin. Najlepszą zdolnością transportu płynnej wilgoci odznaczała się dzianina wykonana z mieszanki: bawełna 54%/ poliester 46%.
Źródło:
Technologia i Jakość Wyrobów; 2023, 68; 62--79
2299-7989
Pojawia się w:
Technologia i Jakość Wyrobów
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New environmentally friendly low-pressure refrigerants mini-channel
Autorzy:
Sikora, Malgorzata
Bohdal, Tadeusz
Powiązania:
https://bibliotekanauki.pl/articles/2204072.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
refrigerants
global warming potential
ozone depletion potential
fluorinert liquid
hydrofluoroether
Opis:
Nowadays, in addition to the thermodynamic properties of refrigerants, their impact on the environment is of high significance. Hence, it is important to use refrigerants with the lowest possible values of ozone depletion potential and global warming potential indices in refrigeration, organic Rankine cycle (ORC), air conditioning, and heat pump systems. Natural refrigerants are the most environmentally friendly; unfortunately, they have less favourable thermodynamic properties. Currently, low-pressure refrigerants from the FC (fluorocarbons, fluorine liquids) and HFE (hydrofluoroether) groups are increasingly used. This paper presents the most important properties and applications of selected refrigerants from these groups and also reviews the literature on their use.
Źródło:
Archives of Thermodynamics; 2023, 44, 1; 89--104
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł

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