Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "egzergia" wg kryterium: Temat

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-10 z 10
    Tytuł:
    Exergetic cost of steam power plant operation
    Autorzy:
    Budnik, M.
    Stanek, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/240012.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    egzergia
    koszt egzergetyczny
    urządzenie napędowe
    exergetic cost
    exergy
    power plant
    Opis:
    The paper is devoted to the problems of exergetic cost determination. A brief description of theoretical fundamentals of exergetic cost determination and its application are presented. The applied method of calculations is based on the rules of determination of cumulative exergy consumption. The additional possibilities ensured by the exergetic cost analysis in comparison to the direct exergy consumption analysis are discussed. The presented methodology was applied for the analysis of in.uence of operational parameters on exergetic cost indices of steam power plant. Results of calculations concern one of the modern Polish power plant unit. Basing on the obtained results several conclusions have been formulated that show advantages of application of exergetic cost analyses.
    Źródło:
    Archives of Thermodynamics; 2011, 32, 2; 39-54
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Exergetic Analysis For A Complete Node Of Fluidised-Bed Drying Of Poppy Seeds
    Autorzy:
    Skoneczna-Łuczków, J.
    Ciesielczyk, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/185488.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    fluidised drying
    efficiency
    exergy
    poppy seed
    suszenia fluidalnego
    wydajność
    egzergia
    Opis:
    The article presents an experimental-theoretical analysis of fluidised-bed drying of poppy seeds directed on minimisation of energy. The analysis was performed for a complete drying node incorporating a heat exchanger and a fan. Two complementary factors were used in the exergetic evaluation: exergy efficiency and unit consumption of exergy. An analysis of drying in stationary bed was carried out for comparison purposes. Results of the exergetic analysis can become a basis for innovative works focused on decreasing energy consumption of a technological node being analysed, e.g. by the use of recirculation of fluidising-drying medium.
    Źródło:
    Chemical and Process Engineering; 2015, 36, 4; 437-447
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermodynamic analysis of a new dual evaporator CO2 transcritical refrigeration cycle
    Autorzy:
    Abdellaoui, E. Y.
    Kairouani, L. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/240198.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    CO2
    energy
    refrigeration
    ejector
    exergy
    energia
    chłodzenie
    ejektor
    egzergia
    Opis:
    In this work, a new dual-evaporator CO2 transcritical refrigeration cycle with two ejectors is proposed. In this new system, we proposed to recover the lost energy of condensation coming off the gas cooler and operate the refrigeration cycle ejector free and enhance the system performance and obtain dual-temperature refrigeration simultaneously. The effects of some key parameters on the thermodynamic performance of the modified cycle are theoretically investigated based on energetic and exergetic analysis. The simulation results for the modified cycle indicate more effective system performance improvement than the single ejector in the CO2 vapor compression cycle using ejector as an expander ranging up to 46%. The exergetic analysis for this system is made. The performance characteristics of the proposed cycle show its promise in dual-evaporator refrigeration system.
    Źródło:
    Archives of Thermodynamics; 2017, 38, 1; 39-62
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Exergy analysis of operation of two-phase ejector in compression refrigeration systems
    Autorzy:
    Dudar, A.
    Butrymowicz, D.
    Śmierciew, K.
    Karwacki, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/240804.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    two-phase ejector
    compression refrigeration system
    COP
    exergy
    strumienica dwufazowa
    egzergia
    Opis:
    Paper deals with theoretical analysis of possible efficiency increase of compression refrigeration cycles by means of application of a two-phase ejector. Application of the two phase ejector in subcritical refrigeration system as a booster compressor is discussed in the paper. Results of exergy analysis of the system operating with various working fluids for various operating conditions have been shown. Analysis showed possible exergy efficiency increase of refrigeration compression cycle.
    Źródło:
    Archives of Thermodynamics; 2013, 34, 4; 107-122
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Energetic and exergetic analysis of a triple-pressure reheat combined cycle power using different primary movers
    Autorzy:
    Almutairi, Abdulrahman
    Alhajeri, Hamad
    Alenezi, Abdulrahman
    Powiązania:
    https://bibliotekanauki.pl/articles/240192.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    exergy
    aeroderivative
    gas turbine
    reheat and waste exergy
    egzergia
    turbina gazowa
    Opis:
    In this work, actual operating data for Sabiya combined cycle power plant located in Kuwait were used to conduct the performance evaluation based on the energetic and exergetic analysis. The proposed system consist of an advanced gas turbine engines, with two triple pressure reheat heat recovery steam generator, and one steam turbine. Three types of primary movers were selected carefully, in order to cover different types, sizes and technologies. The movers are gas turbine engine frame 9FA, LM6000 and GT26. The proposed models have been developed using specialised software and validated with the manufacturer’s data featuring a high level of compatibility. The performance of a combined cycle power plant was investigated for different operating conditions. The result shows that the highest exergy destruction takes place in 9FA engine due to high irreversibility in combustion chamber because of low-pressure ratio, which causes low inlet temperature of compressed air to the combustion chamber. The 9FA engine also has the highest exergy loss due to high exhaust gases temperature, which is caused high useful work from a steam turbine. The GT26-reheat gas turbine engine constitute the best choose as primary mover due to low waste exergy, which is equal to 43.93% whereas 9FA and LM6000 equal to 47.27% and 45.17%, respectively. LM6000 aeroderivative gas turbine is considered the second best choice but the combined cycle power plant will consist of a large number of engines compared to other industrial gas turbine engine, and that may increase the number of auxiliary equipment, capital and maintenance cost.
    Źródło:
    Archives of Thermodynamics; 2019, 40, 2; 87-105
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of exergy analysis for evaluation of CO2 emission from operation of steam power unit
    Autorzy:
    Stanek, W.
    Budnik, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/240519.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    egzergia
    emisja CO2
    straty egzergii
    CO2 emission
    exergy
    exergy losses
    Opis:
    Szargut proposed the algorithm for determination of the influence of irreversibility of components of thermal process on the emission of CO2 [6]. In the presented paper, basing on Szargut's proposal, the example of analysis of influence of operational parameters of coal fired power plant on the local increase of CO2 emission is presented. The influence of operational parameters on the local exergy losses appearing in components of investigated power plant are simulating making use of the semi-empirical model of power plant.
    Źródło:
    Archives of Thermodynamics; 2010, 31, 4; 81-91
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of the cumulative exergy consumption of an integrated oxy-fuel combustion power plant
    Autorzy:
    Ziębik, A.
    Gładysz, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/240724.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    exergy
    cumulative consumption
    oxy-combustion
    integrated power plant
    egzergia
    skumulowane zużycie
    oksyspalanie
    zintegrowana elektrownia
    Opis:
    In order to analyze the cumulative exergy consumption of an integrated oxy-fuel combustion power plant the method of balance equations was applied based on the principle that the cumulative exergy consumption charging the products of this process equals the sum of cumulative exergy consumption charging the substrates. The set of balance equations of the cumulative exergy consumption bases on the ‘input-output method’ of the direct energy consumption. In the structure of the balance we distinguished main products (e.g. electricity), by-products (e.g. nitrogen) and external supplies (fuels). In the balance model of cumulative exergy consumption it has been assumed that the cumulative exergy consumption charging the supplies from outside is a quantity known a priori resulting from the analysis of cumulative exergy consumption concerning the economy of the whole country. The byproducts are charged by the cumulative exergy consumption resulting from the principle of a replaced process. The cumulative exergy consumption of the main products is the final quantity.
    Źródło:
    Archives of Thermodynamics; 2013, 34, 3; 105-122
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermodynamic processes involving liquefied natural gas at the LNG receiving terminals
    Procesy termodynamiczne z wykorzystaniem skroplonego gazu ziemnego w terminalach odbiorczych LNG
    Autorzy:
    Łaciak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/218953.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    LNG
    skroplony gaz ziemny
    egzergia
    obieg termodynamiczny
    terminal rozładunkowy
    regazyfikacja
    liquefied natural gas
    exergy
    thermodynamic cycle
    unloading terminal
    regasification
    Opis:
    The increase in demand for natural gas in the world, cause that the production of liquefied natural gas (LNG) and in consequences its regasification becoming more common process related to its transportation. Liquefied gas is transported in the tanks at a temperature of about 111K at atmospheric pressure. The process required to convert LNG from a liquid to a gas phase for further pipeline transport, allows the use of exergy of LNG to various applications, including for electricity generation. Exergy analysis is a well known technique for analyzing irreversible losses in a separate process. It allows to specify the distribution, the source and size of the irreversible losses in energy systems, and thus provide guidelines for energy efficiency. Because both the LNG regasification and liquefaction of natural gas are energy intensive, exergy analysis process is essential for designing highly efficient cryogenic installations.
    Wzrost zapotrzebowania na gaz ziemny na świecie powoduje, że produkcja skroplonego gazu ziemnego (LNG), a w konsekwencji jego regazyfikacja, staje się coraz bardziej powszechnym procesem związanym z jego transportem. Skroplony gaz transportowany jest w zbiornikach w temperaturze około 111K pod ciśnieniem atmosferycznym. Przebieg procesu regazyfikacji niezbędny do zamiany LNG z fazy ciekłej w gazową dla dalszego transportu w sieci, umożliwia wykorzystanie egzergii LNG do różnych zastosowań, między innymi do produkcji energii elektrycznej. Analiza egzergii jest znaną techniką analizowania nieodwracalnych strat w wydzielonym procesie. Pozwala na określenie dystrybucji, źródła i wielkości nieodwracalnych strat w systemach energetycznych, a więc ustalić wytyczne dotyczące efektywnego zużycia energii. Ponieważ zarówno regazyfikacja LNG jak i skraplanie gazu ziemnego są energochłonne, proces analizy egzergii jest niezbędny do projektowania wysoce wydajnych instalacji kriogenicznych.
    Źródło:
    Archives of Mining Sciences; 2013, 58, 2; 349-359
    0860-7001
    Pojawia się w:
    Archives of Mining Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    My pursuit of truth in building materials engineering
    Moje poszukiwania prawdy w inżynierii materiałów budowlanych
    Autorzy:
    Czarnecki, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/230157.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    inżynieria materiałów budowlanych
    wymagania podstawowe
    entropia
    egzergia
    digitalizacja nauki
    histereza rozwoju
    building materials engineering
    fundamental requirements
    entropy
    exergy
    science digitalization
    development hysteresis
    Opis:
    The paper presents pursuits of the truth in building materials engineering. Some definitions of “what truth is” were presented. Partial truths were specified: the truth of scientific reasoning, the truth of scientific assessment, the truth of development directions and the splendour of scientific truth. All categories are addressed to the building materials engineering. In the chapter “Load capacity and stability vs entropy” definitions of entropy and exergy were presented followed by their influence on building construction, illustrated by the “Seneca cliff” and “Energy pyramid”. Chapter 3 presents the truth of scientific reasoning was presented. Three partial truths were indicated: the truth of experimental fact, the truth of scientific reasoning and the truth of scientific presentation. In the chapter “Truth of scientific assessment” two main assessment methods were presented: peer review and a bibliometric parametric assessment as well as their impact on the results and authors. The risks associated with the sole parametric assessment were shown as the two basic factors of a parametric assessment – citation number and Hirsch index – need time to "mature". Additionally, the influence of digitalisation of the assessment of a scientist and a scientific unit on the commoditisation and dehumanisation of science was outlined. In the chapter “Truth of development directions: defined past – fuzzy future” the megatrends observed in technology in the last few decades years were indicated along with new possible trends. Milestones in the development of C-PCs (Concrete-Polymer Composites) were presented. The new paradigm for the new development cycle was proposed.
    Artykuł jest osobistą refleksją autora nad wywiązaniem się ze ślubowań akademickich dociekać prawdy, głosić ją oraz dawać świadectwo, a także doktorskich - aby szerzyła się coraz bardziej prawda, od której zawisła przyszłość i szczęście rodzaju ludzkiego. Rozważania te są zaadresowane do Inżynierii Materiałów Budowlanych – obszaru nauki, który formalnie nie był zdefiniowany ani wyodrębniony w momencie składania ślubowań. Nauka może być zdefiniowana jako dążenie do prawdy; w prawdzie zaklęty jest cel, ale i etos nauki. Postęp nauki nie zawsze prowadzi prostą drogą do prawdy. Często odpowiadamy tylko na pytanie czy model opisujący dane zjawisko jest wystarczająco prawdziwy. Prawda inżynierii materiałów budowlanych ma nie tylko wymiar wartości, ale również waży materialnie. „Prawdziwość” metody pomiaru może decydować o bezpieczeństwie konstrukcji, ale również istotnie znaczy w jej koszcie. Obszar rozważań został określony jako relacja „materiał – konstrukcja” i przypisano tu myśl przewodnią „nośność i stateczność a entropia”.
    Źródło:
    Archives of Civil Engineering; 2020, 66, 3; 3-35
    1230-2945
    Pojawia się w:
    Archives of Civil Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermodynamical motivation of the Polish energy policy
    Autorzy:
    Ziębik, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/240888.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    efektywność energetyczna
    egzergia
    kogeneracja
    koszt termoekologiczny
    odzysk ciepła
    polityka energetyczna
    straty egzergii
    cogeneration
    energy effectiveness
    energy policy
    exergy
    exergy losses
    thermoecological cost
    Waste-heat recovery
    Opis:
    Basing on the first and second law of thermodynamics the fundamental trends in the Polish energy policy are analysed, including the aspects of environmental protection. The thermodynamical improvement of real processes (reduction of exergy losses) is the main way leading to an improvement of the effectivity of energy consumption. If the exergy loss is economically not justified, we have to do with an error from the viewpoint of the second law analysis. The paper contains a thermodynamical analysis of the ratio of final and primary energy, as well as the analysis of the thermo-ecological cost and index of sustainable development concerning primary energy. Analyses of thermo-ecological costs concerning electricity and centralized heat production have been also carried out. The effect of increasing the share of high-efficiency cogeneration has been analyzed, too. Attention has been paid to an improved efficiency of the transmission and distribution of electricity, which is of special importance from the viewpoint of the second law analysis. The improvement of the energy effectivity in industry was analyzed on the example of physical recuperation, being of special importance from the point of view of exergy analysis.
    Źródło:
    Archives of Thermodynamics; 2012, 33, 4; 3-21
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

      Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies