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 "steam condensation" wg kryterium: Temat

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-11 z 11
    Tytuł:
    Determining steam condensation pressure in a power plant condenser in off-design conditions
    Autorzy:
    Laskowski, Rafał
    Smyk, Adam
    Ruciński, Adam
    Szymczyk, Jacek
    Powiązania:
    https://bibliotekanauki.pl/articles/1954999.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    thermal power plant
    steam condenser
    condenser model
    steam condensation
    pressure
    reference parameters
    steam condenser effectiveness
    Opis:
    The paper presents formulas which can be used to determine steam condensation pressure in a power plant condenser in off-design conditions. The mathematical model provided in the paper makes it possible to calculate the performance of the condenser in terms of condensing steam pressure, cooling water temperature at the condenser outlet, and condenser effectiveness under variable load conditions as a function of three input properties: the temperature and the mass flow rate of cooling water at the condenser inlet and the mass flow rate of steam. The mathematical model takes into account values of properties occurring in reference conditions but it contains no constant coefficients which would have to be established based on data from technical specifications of a condenser or measurement data. Since there are no such constant coefficients, the model of the steam condenser proposed in the paper is universally applicable. The proposed equations were checked against warranty measurements made in the condenser and measurement data gathered during the operation of a 200 MW steam power unit. Based on the analysis, a conclusion may be drawn that the proposed means of determining pressure in a condenser in off-design conditions reflects the condenser performance with sufficient accuracy. This model can be used in optimization and diagnostic analyses of the performance of a power generation unit.
    Źródło:
    Archives of Thermodynamics; 2021, 42, 3; 45-62
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Transfer of scientific research results to practice - case study of innovative solutions which have been implemented in energetics
    Autorzy:
    Karczewski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/105702.pdf
    Data publikacji:
    2014
    Wydawca:
    Centrum Badań i Innowacji Pro-Akademia
    Tematy:
    energetics
    commercialization
    innovations
    steam condensation turbine
    control system
    optimization
    energetyka
    komercjalizacja
    innowacje
    system sterowania
    optymalizacja
    Opis:
    The article presents the experiences of the “ITC” Heat Engineering Department in Łódź of the Energy Institute in implementing innovative solutions in the field of power engineering. The process of commercialization of scientific research results is described. Based on the example of the electro-hydraulic power regulator, developed in ITC and implemented in one of the professional power plants, which put into operation innovative solutions resulting from scientific research, the individual stages of knowledge transfer to the economy are presented. The structure, composition and functions of the regulator are discussed, as well as the results of object-oriented research, which prove the correctness of its operation and the validity of the adopted solutions. Examples of the benefits of the implementation of regulators are provided, exemplifying good practice in the area of cooperation between industry and research facilities.
    Źródło:
    Acta Innovations; 2014, 12; 61-69
    2300-5599
    Pojawia się w:
    Acta Innovations
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Influences of Cavitation Effects on the Electric Conductivity of Juices in Sugar Production
    Autorzy:
    ZHEPLINSKA, MARIIA
    BUROVA, ZINAJIDA
    MUCHTRUK, MYCHAJLO
    BAL’-PRYLYPKO, Larysa
    Powiązania:
    https://bibliotekanauki.pl/articles/456959.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Rzeszowski
    Tematy:
    cellular juice
    diffusion juice
    sugar production
    electric conductivity
    steam-condensation cavitation
    macromolecular compounds
    colloidal dispersion substances
    Opis:
    The paper presents the results of studies the influence cavitation effects arising from the juices steam treatment on cellular and diffusion juices in sugar production. In conducting parallel studies the juices treatment by steam and their usual heating and cooling structural transformations in the constituent parts of juices have been established which leads to an increase in electric conductivity. Thus ion carriers are releasing which will allow to increase the juice purity and the sugar-sand production amount.
    Źródło:
    Edukacja-Technika-Informatyka; 2018, 9, 2; 299-303
    2080-9069
    Pojawia się w:
    Edukacja-Technika-Informatyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The results of the experimental research of the heat transfer coefficient during steam condensation in the tubes of the diesel radiator sections
    Rezultaty ehksperimenthykh issledovanijj koehfficienta teplootdanykh pri kondensacii para v trubkakh teplovoznykh radiatornykh sekcijj
    Autorzy:
    Sklifus, Y.
    Mohyla, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/792234.pdf
    Data publikacji:
    2012
    Wydawca:
    Komisja Motoryzacji i Energetyki Rolnictwa
    Tematy:
    experimental research
    heat transfer coefficient
    heat transfer ratio
    diesel locomotive
    phase transition
    cooling system
    power plant
    steam condensation
    Źródło:
    Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2012, 12, 4
    1641-7739
    Pojawia się w:
    Teka Komisji Motoryzacji i Energetyki Rolnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical estimation of losses in steam flow through LP turbine blade rows
    Autorzy:
    Dyskas, S.
    Wróblewski, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/1955213.pdf
    Data publikacji:
    2006
    Wydawca:
    Politechnika Gdańska
    Tematy:
    LP steam turbine
    wet steam
    condensation
    losses
    Opis:
    The aim of this work is to estimate the losses in steam flow through an LP steam turbine rotor and the who]e stage. Two types of losses occur in steam flow, aerodynamic (profile, secondary flow, leakage) and thermodynamic (due to addition of heat caused by condensation). The presented numerical results are split into two groups. First, a comparison of three different calculation methods of steam flow is carried out. To this end, the geometry of an LP steam turbine's last rotor is chosen. The first examined method is the Streamline Curvature Method (SCM) used on the meridional plane with loss correlations, the other two being commercial and in-house CFD codes, solving the Reynolds-averaged Navier-Stokes equations for a 3D flow. The first two codes model equilibrium steam properties below the saturation line, while the latter models non-equilibrium steam properties. Finally, a comparison is made of the influence on lass prediction of various condensation models for the geometry of the penultimate stage, with the use of an in-house CFD code.
    Źródło:
    TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2006, 10, 2; 177-190
    1428-6394
    Pojawia się w:
    TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Estimation of the steam condensation flow via CFD methods
    Autorzy:
    Zakrzewski, W.
    Karcz, M.
    Kornet, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/175353.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    condensation model
    steam turbine
    CFD
    Opis:
    The results of numerical simulations to predict the performance of different steam models have been presented. All of the considered models of steam condensation have been validated on the base of benchmark experiment employing expansion in nozzle and next on the low pressure part of the steam turbine stage. For numerical analysis three models have been finally used - the ideal steam model without condensation, equilibrium steam model and a nonequilibrium steam model. It was confirmed that only the inclusion of the nonequilibrium effects in the computations can lead to a proper prediction of the condensation phenomena in the test nozzle. However, the basic characteristics of the low-pressure turbine can be succesfully estimated using a simple ideal steam or the equilibrium condensation model.
    Źródło:
    Transactions of the Institute of Fluid-Flow Machinery; 2012, 124; 111-124
    0079-3205
    Pojawia się w:
    Transactions of the Institute of Fluid-Flow Machinery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wet steam flow in 1100 MW turbine
    Autorzy:
    Jun, Gukchol
    Kolovratník, Michal
    Hoznedl, Michal
    Powiązania:
    https://bibliotekanauki.pl/articles/1954998.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    steam turbine
    wet steam
    loss
    non-equilibrium condensation
    CFD
    Opis:
    The paper deals with the wet steam flow in a steam turbine operating in a nuclear power plant. Using a pneumatic and an optical probe, the static pressure, steam velocity, steam wetness and the fine water droplets diameter spectra were measured before and beyond the last turbine low-pressure stage. The results of the experiment serve to understand better the wet steam flow and map its liquid phase in this area. The wet steam data is also used to modify the condensation model used in computational fluid dynamics simulations. The condensation model, i.e. the nucleation rate and the growth rate of the droplets, is adjusted so that results of the numerical simulations are in a good agreement with the experimental results. A 3D computational fluid dynamics simulations was performed for the lowpressure part of the turbine considering non-equilibrium steam condensation. In the post-processing of the of the numerical calculation result, the thermodynamic wetness loss was evaluated and analysed. Loss analysis was performed for the turbine outputs of 600, 800, and 1100 MW, respectively.
    Źródło:
    Archives of Thermodynamics; 2021, 42, 3; 63-85
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical calculation of the steam condensing flow
    Autorzy:
    Dykas, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1967648.pdf
    Data publikacji:
    2001
    Wydawca:
    Politechnika Gdańska
    Tematy:
    condensation
    homogeneous
    real gas
    wet steam
    Opis:
    Considering the flow in the last stages of LP (low pressure) steam turbine the strong non-linearity of the thermal parameters of state and possibility of the two-phase flow have to be taken into account in the numerical calculation of the flow field. In this paper numerical calculations of the steam condensing flow for the turbine geometry are presented. The steam properties are described here on the basis of the IAPWS’97 formulation. The classical nucleation theory of Volmer and Frenkel was adapted for modelling of condensing flow. The droplet growth model of Gyarmathy is implemented. The calculations are based on the time dependent 3D Euler equations, which are coupled to three additional mass conservation equations for the liquid phase and are solved in conservative form.
    Źródło:
    TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2001, 5, 4; 519-535
    1428-6394
    Pojawia się w:
    TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study of the effectiveness of the turbine condenser air extraction system using hydro ejectors
    Autorzy:
    Badur, J.
    Kowalczyk, T.
    Ziółkowski, P.
    Tokarczyk, P.
    Woźniak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/175162.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    condensation
    steam condenser
    Venturi nozzle
    Dalton’s law
    partial pressure
    Opis:
    The aim of the paper is to investigate the effectiveness of the 18K380 steam turbine condenser air extraction system using hydro ejectors. Motivation for the analysis was a need of improvement of the energy conversion ratio of the power plant. To achieve this goal it was necessary to establish efficiency of each subsystem of the energy cycle. The air extraction system is not a highly power consuming system but it has great impact on the steam cycle efficiency by influence on the condensation temperature. The air extraction system effectiveness depends on a weather conditions, exactly on the ambient temperature, which raises the question whether it is worth to modernize the hydro ejectors or replace them by a centrifugal vacuum pumps. To establish the vacuum system effectiveness a new innovative mass flow measuring system has been implemented to measure an air-steam mixture flow and the fraction of the air mass in the mixture. The measuring system is based on a Venturi nozzle supplemented with a temperature drop during the mixture expansion.
    Źródło:
    Transactions of the Institute of Fluid-Flow Machinery; 2016, 131; 41-53
    0079-3205
    Pojawia się w:
    Transactions of the Institute of Fluid-Flow Machinery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The analyzis of the stream-air mixture during a flow through a tube bank inside a condenser
    Autorzy:
    Krzyślak, P.
    Joachimiak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/175261.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    condenser
    pressure drop
    steam-air mixture
    water vapor condensation in a solution with air
    partial pressure
    Opis:
    The paper presents the results of calculations related to the flow analysis of a tube bank taking into account the partial pressures of gases flowing through the condenser. Different mass share of the gas not condensing in the heat exchanger upstream to the first row of tubes and the partial pressures of water vapor and air have been taken into account. The value of the partial pressures of gases, pressures drop, temperature, velocity, Reynolds number, and air share in the subsequent rows of tubes have been calculated. This study is a basis for the analysis of heat exchange in the condenser considering the influence of the noncondensing gas. The increase in the share of air in the following rows of tubes results in an increase in the thermal resistance and condensation of increasingly lower mass of water vapor.
    Źródło:
    Transactions of the Institute of Fluid-Flow Machinery; 2014, 126; 131-140
    0079-3205
    Pojawia się w:
    Transactions of the Institute of Fluid-Flow Machinery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Control-volume-based model of the steam-water injector flow
    Autorzy:
    Kwidziński, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/240854.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    kondensacja
    nadkrytyczny dozownik wodno-gazowy
    nierównowaga termiczna
    równanie bilansowe
    straty nieodwracalne
    balance equations
    condensation
    irreversible losses
    supercritical steam-water injector
    thermodynamic nonequilibrium
    Opis:
    The paper presents equations of a mathematical model to calculate flow parameters in characteristic cross-sections in the steam-water injector. In the model, component parts of the injector (steam nozzle, water nozzle, mixing chamber, condensation wave region, diffuser) are treated as a series of connected control volumes. At first, equations for the steam nozzle and water nozzle are written and solved for known flow parameters at the injector inlet. Next, the flow properties in two-phase flow comprising mixing chamber and condensation wave region are determined from mass, momentum and energy balance equations. Then, water compression in diffuser is taken into account to evaluate the flow parameters at the injector outlet. Irreversible losses due to friction, condensation and shock wave formation are taken into account for the flow in the steam nozzle. In two-phase flow domain, thermal and mechanical nonequilibrium between vapour and liquid is modelled. For diffuser, frictional pressure loss is considered. Comparison of the model predictions with experimental data shows good agreement, with an error not exceeding 15% for discharge (outlet) pressure and 1 K for outlet temperature.
    Źródło:
    Archives of Thermodynamics; 2010, 31, 1; 45-59
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-11 z 11

      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