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Tytuł:
Ice with a non-conventional cooling system temperature mapping
Autorzy:
Hlavňa, V.
Sojčak, D.
Istenik, R.
Powiązania:
https://bibliotekanauki.pl/articles/243209.pdf
Data publikacji:
2007
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
non-conventional cooling system
combustion engine
non-conventional energetic system
thermal balance
Opis:
Within the framework of the basic research task funded by the Agency for support of research and development we solve a problem of a more effective non-conventional usage of the part of energy taken away by the ICE cooling system. The energy is used for production of cold. Results ofpartial solutions and methodology of energetic evaluation have been already presented in various conferences and symposia as well as published in several professional journals. This contribution brings some newly acquired theoretical and practical experience gathered during the operation of a test laboratory sample of the cooling engine in a non-conventional energetic unit. Experiments were focused on temperature mapping. The basic scheme of a non-conventional energetic unit with a cooling engine, the view of a functional laboratory sample, surface temperature in the vicinity of evaporator - taken by thermal imaging, time course of changes in the engine torque, revolutions and temperature on the engine, temperatures in the evaporator, temperatures in the liquefier, temperatures in the absorber, temperatures in the evaporator, temperatures in the VBR exchanger are presented in the paper. The results of the experiment shown that there is a 10 - 15 % agreement with the results acquired through calculations. Theoretical assumptions and solutions carried out for the alternative cooling liquid of the cooling engine in a non-conventional energetic unit can be considered real. Within the framework of this consideration a test circuit is being prepared for experiments with alternative cooler.
Źródło:
Journal of KONES; 2007, 14, 2; 187-193
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Problemy zasilania współczesnych silników spalinowych wybranymi biopaliwami
Problems in supplying modern internal combustion engine with biofuels
Autorzy:
Biernat, Krzysztof
Jeziorkowski, Adrian
Powiązania:
https://bibliotekanauki.pl/articles/1817409.pdf
Data publikacji:
2008-12-31
Wydawca:
Uniwersytet Kardynała Stefana Wyszyńskiego w Warszawie
Tematy:
biopaliwa
paliwa konwencjonalne
biofuels
conventional fuels
Opis:
The paper presents most popular biofuels with their basic physicochemical properties in comparison with conventional fuels, the article also contains present normalizations of selected alternative fuels, the possibilities of supplying modern internal combustion engine with biofuels with requiring changes in their constructions were estimated on the basis of collected documentation.
Źródło:
Studia Ecologiae et Bioethicae; 2008, 6, 1; 307-329
1733-1218
Pojawia się w:
Studia Ecologiae et Bioethicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Identyfikowanie czynności konwencjonalnych w prawie jako proces rozpoznawania ich sensu – wstęp do problematyki
Identification of Conventional Acts in Law as a Process of Recognizing Their Sense: An Introduction
Autorzy:
Gmerek, Karolina
Powiązania:
https://bibliotekanauki.pl/articles/1788477.pdf
Data publikacji:
2021
Wydawca:
Stowarzyszenie Filozofii Prawa i Filozofii Społecznej – Sekcja Polska IVR
Tematy:
czynności konwencjonalne
czynności konwencjonalne w prawie
sens czynności konwencjonalnych w prawie
identyfikowanie czynności konwencjonalnych w prawie
conventional acts
conventional acts in law
sense of conventional acts in law
conventional acts in law identification process
Opis:
Refleksja nad sensem czynności konwencjonalnych od początku towarzyszy ogólnoteoretycznym rozważaniom dotyczącym czynności konwencjonalnych w prawie. Dyskusję we wskazanym zakresie z jednej strony można uznać za rozwiniętą i wielowątkową, z drugiej zaś za wciąż otwartą. Niniejsze opracowanie jest głosem w tej dyskusji, a jego głównym celem jest wstępne opracowanie problematyki identyfikowania czynności konwencjonalnych w prawie. W pierwszej kolejności w artykule omówiono sposoby pojmowania sensu czynności konwencjonalnych w literaturze teoretycznoprawnej, zwracając szczególną uwagę na relacje pomiędzy proponowanymi w literaturze definicjami terminu „czynność konwencjonalna” a pojmowaniem sensu tego typu czynności. W dalszej kolejności rozwinięto zagadnienie poziomów sensu czynności konwencjonalnych w prawie oraz przedstawiono zarys problematyki związanej z procesem identyfikowania czynności konwencjonalnych w prawie, rozumianym jako proces rozpoznawania ich sensu. Szczególną uwagę zwrócono na relację pomiędzy sposobem definiowania terminu „czynność konwencjonalna”, a procesem jej identyfikowania tego typu czynności. Nadanie tej relacji odpowiedniej doniosłości pozwala bowiem m.in. na ugruntowanie problematyki identyfikowania czynności konwencjonalnych w obrębie koncepcji czynności konwencjonalnych w prawie. Skupienie uwagi na kwestii identyfikowania czynności konwencjonalnych (w prawie) „otwiera” koncepcję na takie zagadnienia, które dotychczas nie były w niej przedmiotem systematycznych rozważań.
From the very beginning, reflection on the sense of conventional acts (in law) accompanies theoretical considerations on conventional acts. On the one hand, that discussion can be considered developed and multi-threaded, and on the other hand, it is still open. This study is a voice in that discussion. The main aim of the article is to preliminary elaborate the identification process of conventional acts in law. The article also seeks to meet complementary research objectives which concern: 1) identifying the ways of understanding the meaning of conventional acts in the general theory of law, paying attention to the relationship between the definitions of the term “conventional act” and the understanding of the meaning of this type of acts, 2) considering problems of meaning levels of the conventional acts in law, and 3) describing the basic methodological assumptions of the conventional acts in law identification process. Particular attention is paid to the relationship between the way of defining the term “conventional act” and the identification process of this type of acts. Showing importance of this relationship allows to establish the proper place of the identification process within the concept of conventional acts in law and somehow “opens” the concept to issues which have not been, in the concept, the subject of systematic considerations.
Źródło:
Archiwum Filozofii Prawa i Filozofii Społecznej; 2021, 3(28); 54-68
2082-3304
Pojawia się w:
Archiwum Filozofii Prawa i Filozofii Społecznej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of the efficiency measurement of the conventional and Islamic banks
Autorzy:
Musa, Hussam
Natorin, Viacheslav
Musova, Zdenka
Durana, Pavol
Powiązania:
https://bibliotekanauki.pl/articles/19233487.pdf
Data publikacji:
2020
Wydawca:
Instytut Badań Gospodarczych
Tematy:
Islamic banks
conventional banks
efficiency
DEA
Opis:
Research background: Islamic banks appeared on the world scene as active players over two decades ago. Many of the principles upon which Islamic banking is based have been commonly accepted all over the world. Financial institutions driven by Islamic principles acquire new clientele without excessive marketing, due to preservation of conservative values. Contrary to the conventional investment banks, their value is based on real money, and not on virtual activities from swap and derivative assets. Competition between conventional (or traditional) and Islamic banks is increasing every day, moreover, Islamic financial institutions are more resistant to the crisis. Our study contains analysis and comparison of economic efficiency of the conventional and Islamic banks. Besides the fact that traditional and Islamic banks apply inputs differently, the reason of better efficiency of Islamic banks may be connected with different approach to the risk management and control of the banking operations by the Sharia commission. Purpose of the article: The main aim of the article is to compare the economic efficiency of the conventional and Islamic banks in Europe. Methods: To achieve the aim of the paper, firstly the selected financial indicators of traditional and Islamic banks in Europe were compared. The second, the analysis of the economic efficiency of the selected 1460 conventional and Islamic financial institutions using DEA methods was conducted. Findings & Value added: Research results indicated methodological differences in the economic efficiency measuring in the Islamic banks. At the same time, the higher economic efficiency of Islamic banks was confirmed. The results are motivating for the follow-up investigation into the causes of higher efficiency of Islamic banks compared to traditional banks.
Źródło:
Oeconomia Copernicana; 2020, 11, 1; 29-58
2083-1277
Pojawia się w:
Oeconomia Copernicana
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Whether the opinion about superiority of fuzzy controllers is justified
Autorzy:
Gessing, R.
Powiązania:
https://bibliotekanauki.pl/articles/199925.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fuzzy logic
fuzzy regulators
conventional regulators
Opis:
In the paper, using some MATLAB fuzzy logic toolbox Demos, in which the fuzzy controllers are compared with the classical PID ones, it is shown that the well tuned classical PID controllers are significantly better than those fuzzy presented in the Demos. It is shown, that using fuzzy approach, it is very difficult to shape the input-output nonlinearity, describing the so called fuzzy block of the fuzzy controller. It is also shown, that the linear fuzzy block (created to obtain comparable results with the classical PID controllers) is not justified at all, because it may be replaced by the usual summing junction, which is significantly simpler. The considerations of the paper do not support the idea of fuzzy controllers.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2010, 58, 1; 59-65
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
L évolution de la peine conventionnelle en droit polonais
Autorzy:
Dąbrowa, Janina
Powiązania:
https://bibliotekanauki.pl/articles/43665735.pdf
Data publikacji:
1980-12-31
Wydawca:
Polska Akademia Nauk. Instytut Nauk Prawnych PAN
Tematy:
conventional penalty
polish law
evolution
Polska
Źródło:
Droit Polonais Contemporain; 1980, 3-4(47-48); 53-70
0070-7325
Pojawia się w:
Droit Polonais Contemporain
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
O pojęciu czynności konwencjonalnej i jej odmianach
On the concept of a conventional act and its types
Autorzy:
Czepita, Stanisław
Powiązania:
https://bibliotekanauki.pl/articles/694078.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
conventional act
normative conventional act
sign
legal act
czynność konwencjonalna
normatywna czynność konwencjonalna
znak
czynność prawna
Opis:
The concept of a conventional act is well-established in Polish legal thought. The aims of this article are to consider the relations between: firstly – the category of conventional acts and the semantic category of signs, and secondly – the conventional acts and the normative systems, especially the legal ones. The author holds the view that conventional acts are a special kind of signs, strictly speaking: more or less complex sings-actions of conventional (non-natural) character. As regards the relations between conventional acts and normative systems the author distinguishes conventional acts in the broader sense, normatively important conventional acts, as well as normative conventional acts. Normative conventional acts are such normatively important conventional acts for which the meaning of the term referring to acts of a given type is – in an important aspect – marked by the fact that a conventional act of this type creates certain normative consequences. The author puts forward the thesis that acts in law under private law (German: Rechtsgeschaeftes) are actually  normative conventional acts important in a legal system.
Koncepcja czynności konwencjonalnych jest trwale obecna w polskiej refleksji prawniczej. Celem artykułu jest analiza stosunku pojęcia czynności konwencjonalnej do pojęcia znaku, oraz stosunku czynności konwencjonalnych do systemów normatywnych, w szczególności do systemu prawnego. Autor stawia tezę, że niezależnie od różnego rodzaju powiązań pomiędzy czynnościami konwencjonalnymi a znakami językowymi, czynności konwencjonalne są – mniej lub bardziej złożonymi – znakami szczególnego rodzaju, a mianowicie znakami-czynnościami o charakterze konwencjonalnym, przeciwstawionym znakom naturalnym (oznakom). Autor wyróżnia czynności konwencjonalne sensu largo, czynności konwencjonalne doniosłe normatywnie w danym systemie oraz czynności konwencjonalne normatywne, czyli takie, których znaczenie nazwy danego typu czynności wyznaczone jest, w pewnym aspekcie, przez to, że czynności konwencjonalne tego typu wywołują określone konsekwencje normatywne. Czynnościami konwencjonalnymi normatywnymi są w szczególności czynności prawne prawa prywatnego, zarówno czynności prawne typowe, jak i nietypowe.
Źródło:
Ruch Prawniczy, Ekonomiczny i Socjologiczny; 2017, 79, 1; 85-102
0035-9629
2543-9170
Pojawia się w:
Ruch Prawniczy, Ekonomiczny i Socjologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Emotive Prädikationen aus der Sicht der Kerngrammatik
Emotive Predications from the Perspective of Kernel Grammar
Autorzy:
Kotin, Michail L.
Powiązania:
https://bibliotekanauki.pl/articles/458645.pdf
Data publikacji:
2020-06-20
Wydawca:
Uniwersytet Wrocławski. Oficyna Wydawnicza ATUT – Wrocławskie Wydawnictwo Oświatowe
Tematy:
emotive predicates
experiencer
stimulus
conventional/conversational implicature
Opis:
The paper contains an analysis of the syntactic features of emotive predicates as well as the main properties of the codification of feelings in emotive clauses. The emotive predicates possess two arguments with the thematic roles of experiencer and stimulus underlying syntactic movement, which makes them in principle diathetic-sensitive. The syntactic markers of emotionality are: prosody, word order, discourse particles, autonomous ellipsis etc. The latter ones encode emotive readings qua grammar structure, thus, they are the primary encoding forms of emotions. However, they can be both specified and unspecified emotive signals. In the latter case they encode emotionality as such, but it has to be specified qua conversational implicatures.
Źródło:
Linguistische Treffen in Wrocław; 2020, 17; 141-149
2084-3062
2657-5647
Pojawia się w:
Linguistische Treffen in Wrocław
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Relationship between allophane with labile carbon and nitrogen fractions of soil in organic and conventional vegetable farming systems
Autorzy:
Hidayanto, Fajar
Purwanto, Benito Heru
Utami, Sri Nuryani Hidayah
Powiązania:
https://bibliotekanauki.pl/articles/2088194.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
allophane
labile fraction
farming system
organic
conventional
Opis:
Allophane is a characteristic of Andisols whose presence can absorb soil organic matter. One of soil organic matter fractions called the “labile fraction” is currently an appropriate indicator in determining soil quality. However, there is limited information concerning the relationship between allophane and the labile fraction. This study assessed the content of allophane by selective dissolution methods and calculated the labile fraction of particulate organic matter and microbial activity related to the carbon (C) and nitrogen (N) soil cycles in organic and conventional vegetable farming systems of two depths (0–25 cm and 25–50 cm). The content of the labile fractions of C and N in organic farming systems is higher than in conventional farming systems, which is also higher in the upper layer compared to the lower layer. However, the availability of allophane in the upper layer and organic system tends to be low. Therefore, allophane has a strong negative correlation with the labile fractions of carbon and nitrogen. The results of this study estimate that phosphorus (P) sorption is higher in soils containing quite high allophane. Hence, an organic farming system that has low allophane content will result in higher P availability for plants.
Źródło:
Polish Journal of Soil Science; 2020, 53, 2; 273-291
0079-2985
Pojawia się w:
Polish Journal of Soil Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The implicatures on Outdoor Media Related to the Covid-19 Appeal
Autorzy:
Wahdaniah
Surbakti, Ernawati Br.
Jaya, Ilham
Nuthiha, Rahmad
Jamilah
Powiązania:
https://bibliotekanauki.pl/articles/2129833.pdf
Data publikacji:
2022-05-21
Wydawca:
Akademia Pedagogiki Specjalnej. Language and Society Research Committee
Tematy:
Analysis
Outdoor
Media Conventional
Non-convensional
Implications
Opis:
The bloom of reports in outdoor media such as circular letter, banners, and brochures regarding the appeals in preventing Covid-19 is interesting to analyze. This study aims to describe the meaning of implicatures and the causes of implicatures found in outdoor media, namely brochures, billboards, banners, and Covid-19 circular letter in the city of Lhokseumawe, Aceh, Indonesia. The type of research used in this research is qualitative with a descriptive-qualitative approach. 30 data were taken from outdoor media from February to May 2021. The data collection technique was carried out using the listen, be free, engage (get involved), talk (Simak Bebas Libat Cakap/SBLC) technique and take notes. After the data was collected, the next step was data analysis based on the formulation of the problem, namely how the meaning of implicatures and the causes of implicatures are. The meaning of implicatures was analyzed using the equivalent method by grouping the data based on the criteria and the advanced technique used by Equalizing/Distinguishing Comparison (Hubung Banding Menyamakan/Membedakan/HBSP) technique, while the causes of implicatures were analyzed using Dell Hymes theory, namely the SPEAKING speech component. The results of this study found that the meaning of implicatures contained in external media was in the form of conventional (96.6%) and non-conventional (3.33%) implicatures with implicature meanings in form of invitations, information, and appeals. The causes of implicatures found are influenced by the background of the atmosphere, the participants, the results, the message, the tone of speech, and the form of discourse.
Źródło:
Language, Discourse & Society; 2022, 10 (1); 110-127
2239-4192
Pojawia się w:
Language, Discourse & Society
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Human Body in Conventional and Alternative Medicines
Autorzy:
Lytovka, Michał
Powiązania:
https://bibliotekanauki.pl/articles/2096792.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Instytut Socjologii
Tematy:
body
health
illness
conventional medicine
alternative medicine
Opis:
This paper aims to explore two opposite concepts of the human body – according to conventional medicine and according to alternative (holistic) medicine – and to show the mutual interpenetration of these two concepts in the modern world. Conventional medicine sees the body as an endless collection of symptoms spread all over its surface. It presents the body as a way of localizing pain, so in the biomedical discourse the body appears as a place of defining and describing pain. It is located in individual parts, organs, limbs, etc. Alternative medicine looks at the human body from the perspective of structural, chemical and psychological unity, which constantly adapts to the changing conditions of the external environment. It sees illness not as a disorder of one particular organ or system, but as a disorder of the whole organism. However, regardless of the clear distinction between these two concepts in the legal, scientific and ethical spheres and regardless of the general medicalisation of the modern world, these two approaches to the human body are simultaneously accepted by patients.
Źródło:
Konteksty Społeczne; 2014, 2, 2; 35-44
2300-6277
Pojawia się w:
Konteksty Społeczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of factors influencing liquidity of European Islamic and conventional banks
Autorzy:
Musa, Hussam
Musova, Zdenka
Natorin, Viacheslav
Lazaroiu, George
Martin Boda, Martin
Powiązania:
https://bibliotekanauki.pl/articles/19233658.pdf
Data publikacji:
2021
Wydawca:
Instytut Badań Gospodarczych
Tematy:
Islamic banks
conventional banks
capital
liquidity
efficiency
Opis:
Research background: The innovation in Sharīʻah-compliant banking products has resulted in the rapidly increasing size of assets in Islamic banks worldwide. The assets of such banks have been growing twice as fast as those of conventional banks. Islamic banks do not depend on conventional interest, speculation, or complex derivatives stemming from banking operations. Instead, their actions in respect of profit/risk sharing, and the clarity of the contract are consistent with Islamic Sharīʻah principles, which seek to promote a more equal society. Purpose of the article: This research aims to identify and compare factors influencing the liquidity of Islamic and conventional banks in Europe. Candidate factors are sought amongst profitability, credit quality, credit expansion and capital adequacy indicators. Methodology: First, relevant financial ratios for 249 observations on Islamic banks and 2,306 observations on conventional banks are selected and compared for the period 2013?2017. Second, liquidity is explained separately for each type of banks by panel data regression to identify its determinants in a comparative context. Findings & value added: The results indicate that the impact of the net interest margin on the liquidity ratio of Islamic banks is insignificant, which is obviously due to the prohibition of the use of interest (riba). To the contrary, in conventional banking a higher net interest margin results in a reduction in liquidity. Capital adequacy has a positive influence upon liquidity in both types of banks, but in Islamic banking, the influence is 5.4 times greater. The findings strongly suggest that the liquidity of Islamic and conventional banks is affected by different factors.
Źródło:
Oeconomia Copernicana; 2021, 12, 2; 375-398
2083-1277
Pojawia się w:
Oeconomia Copernicana
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design and evaluation of solar parabolic trough collector system integrated with conventional oil boiler
Autorzy:
Taha, Mustefa Jibril
Kibret, Fiseha Bogale
Ramayya, Venkata
Zeru, Balewgize Amare
Powiązania:
https://bibliotekanauki.pl/articles/1841225.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
conventional oil boiler
energy
solar parabolic trough
Opis:
In this paper an attempt has been made towards the design and evaluation of a solar parabolic trough collector (PTC) system integrated with a conventional oil boiler (COB) to increase the energy utilization effectiveness and reduce the environmental emission of the existing conventional oil boiler in the Kombolcha textile factory, in Ethiopia. The factory uses 8500 ton/annum of heavy fuel oil to generate 26 ton/hour of pressurized hot water at 140◦C temperature which causes an increase in greenhouse gas emissions, so the solar parabolic trough collector hot water generation system will be an appropriate solution for this application. Based on the available annual solar radiation, estimates of the solar fraction, solar energy unit price and system pay-back period have been carried out. The proposed system has the potential to save 1055.9 ton/year of fuel oil. The unit cost of PTC solar energy is estimated to be 0.0088 $/kWh and the payback period of the plant is five years. Since the unit price of oil energy (0.0424 $/kWh) is much greater than the unit price of solar energy by a substantial margin (0.033 $/kWh) in Ethiopia, therefore the water heating system by a solar parabolic trough collector is a feasible alternative to heating by a conventional oil boiler.
Źródło:
Archives of Electrical Engineering; 2021, 70, 3; 657-673
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Struktura systemu pomiarowego niekonwencjonalnego obwodu energetycznego
A structure of the measurement system for a non-conventional energetic circuit
Autorzy:
Hlavňa, V.
Powiązania:
https://bibliotekanauki.pl/articles/301417.pdf
Data publikacji:
2009
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
niekonwencjonalny system energetyczny
system pomiarowy
niekonwencjonalny silnik spalinowy
non-conventional energetic system
measurement system
non-conventional combustion engine
Opis:
W artykule omówiono automatyczny systemu pomiarowy, który zastosowano w niekonwencjonalnym obwodzie energetycznym. Podstawą niekonwencjonalnego obwodu energetycznego jest układ trójzmienny, w którym silnik spalinowy o zapłonie samoczynnym jest podstawowym źródłem energii. System ten produkuje energię elektryczną i energie ciepłą na trzech poziomych termicznych. Opisany system jest niekonwencjonalny ponieważ zastosowano niekonwencjonalny obwód chłodzenia silnika spalinowego, który zaprojektowano jako termokompresor dla absorpcji ciepła z tego obwodu.
The paper deals with an automated measuring system implemented in a non-conventional energetic circuit. The basis of a non-conventional energetic circuit is a trivalent system in which the ignition combustion engine is the source of primary energy. The system produces electric and thermal energy at three thermal levels. The system is referred to as non-conventional because of the non-conventional cooling circuit of the combustion engine which has been designed as a thermo compressor for absorptive cooling circulation.
Źródło:
Eksploatacja i Niezawodność; 2009, 1; 11-14
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Calculation method for flow boiling and flow condensation of R134a and R1234yf in conventional and small diameter channels
Autorzy:
Mikielewicz, D.
Jakubowska, B.
Powiązania:
https://bibliotekanauki.pl/articles/259535.pdf
Data publikacji:
2017
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
heat transfer coefficient
flow boiling
conventional channels
minichannels
Opis:
The paper presents the results of calculations performed using the authors’ model to predict the heat transfer coefficient during flow boiling for two refrigerants R134a and R1234yf. The experimental data from various past studies have been collected and the calculations have been conducted for the full range of quality variation and a wide range of mass velocity. The aim of the study was to test the sensitivity of the in-house flow boiling and flow condensation model. The importance of taking into account the surface tension as the parameter exhibiting its importance in case of the flow in minichannels, as well as the influence of the reduced pressure were analysed. The obtained numerical results show good consistency with those recorded in the experiments.
Źródło:
Polish Maritime Research; 2017, S 1; 141-148
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 332

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