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 "air pressure" wg kryterium: Temat

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-6 z 6
    Tytuł:
    Climatic change on King George Island in the years 1948–2011
    Autorzy:
    Kejna, Marek
    Araźny, Andrzej
    Sobota, Ireneusz
    Powiązania:
    https://bibliotekanauki.pl/articles/2051395.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Antarctic
    South Shetland Islands
    climate
    air temperature
    air pressure
    pre−cipitation
    sea surface temperature
    sea−ice
    Źródło:
    Polish Polar Research; 2013, 2; 213-235
    0138-0338
    2081-8262
    Pojawia się w:
    Polish Polar Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    • odwiedzone
    Tytuł:
    Wpływ ciśnienia powietrza roboczego na efektywność mechanicznej aktywacji procesu odsiarczania spalin
    Influence of working air pressure on the efficiency of mechanical activation of the exhaust gas desulfurization process
    Autorzy:
    Urbaniak, D.
    Wyleciał, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/172843.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ciśnienie powietrza
    odsiarczanie spalin
    sorbent wapniowy
    proces rozdrabniania
    air pressure
    flue gas desulphurization
    calcium sorbent
    comminution process
    Opis:
    Przedstawiono możliwości wykorzystania rozdrabniania strumieniowego jako mechanicznej aktywacja sorbentu wapniowego. Połączenie procesów rozdrabniania i odsiarczania spalin daje pozytywne wyniki, przy czym efekt odsiarczania jest lepszy w odniesieniu do procesu rozdrabniania rozłącznego w czasie od procesu odsiarczania spalin. Efektywność procesu rozdrabniania zależy od wielu parametrów: wielkości związanych z rozdrabnianym materiałem, urządzeniem rozdrabniającym, sposobem doprowadzenia energii itp.Wpracy przedstawiono wyniki charakteryzujące wpływ ciśnienia powietrza roboczego na końcowy efekt odsiarczania spalin bezpośrednio w komorze mielenia.
    In the paper the possibility of using the streaming method of grinding as mechanical activation of calcium sorbent is presented. The combination of processes of grinding and fumes desulfurization gives positive results. The desulfurization effect is better in this case in relation to the grinding process completed separately from the fumes desulphurization. The effectiveness of the grinding process depends on the number of parameters such as: quantities associated with grinded material, the grinding unit, a way of grinding energy supply, etc. In the paper the results characterizing the influence of air pressure on the final effect of fumes desulphurization process directly into the grinding chamber are presented.
    Źródło:
    Archiwum Energetyki; 2013, 43, 1/2; 109-116
    0066-684X
    Pojawia się w:
    Archiwum Energetyki
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of heat flow in a tube bank of a condenser considering the influence of air
    Autorzy:
    Joachimiak, M.
    Joachimiak, D.
    Krzyślak, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/240202.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    condensation
    inert gas
    mass share of gas noncondensing in water vapor
    Dalton’s law
    water vapor pressure
    air partial pressure
    kondensacja
    gaz obojętny
    Prawo Daltona
    ciśnienie pary wodnej
    ciśnienie parcjalne
    Opis:
    The pressure of wet water vapor inside a condenser has a great impact on the efficiency of thermal cycle. The value of this pressure depends on the mass share of inert gases (air). The knowledge of the spots where the air accumulates allows its effective extraction from the condenser, thus improving the conditions of condensation. The condensation of water vapor with the share of inert gas in a model tube bank of a condenser has been analyzed in this paper. The models include a static pressure loss of the water vapor/air mixture and the resultant changes in the water vapor parameters. The mass share of air in water vapor was calculated using the Dalton’s law. The model includes changes of flow and thermodynamic parameters based on the partial pressure of water vapor utilizing programmed water vapor tables. In the description of the conditions of condensation the Nusselts theory was applied. The model allows for a deterioration of the heat flow conditions resulting from the presence of air. The paper contains calculations of the water vapor flow with the initial mass share of air in the range 0.2 to 1%. The results of calculations clearly show a great impact of the share of air on the flow conditions and the deterioration of the conditions of condensation. The data obtained through the model for a given air/water vapor mixture velocity upstream of the tube bank allow for identification of the spots where the air accumulates.
    Źródło:
    Archives of Thermodynamics; 2017, 38, 3; 119-134
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    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:
    Performance of a combined cycle power plant due to auxiliary heating from the combustion chamber of the gas turbine topping cycle
    Autorzy:
    Khan, Mohammad Nadeem
    Powiązania:
    https://bibliotekanauki.pl/articles/1845501.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    pressure ratio
    air-fuel ratio
    supplement heating
    exergy analysis
    energy analysis
    Opis:
    Energy demand is increasing exponentially in the last decade. To meet such demand there is an urgent need to enhance the power generation capacity of the electrical power generation system worldwide. A combined-cycle gas turbines power plant is an alternative to replace the existing steam/gas electric power plants. The present study is an attempt to investigate the effect of different parameters to optimize the performance of the combined cycle power plant. The input physical parameters such as pressure ratio, air fuel ratio and a fraction of combustible product to heat recovery heat exchanger via gas turbine were varied to determine the work output, thermal efficiency, and exergy destruction. The result of the present study shows that for maximum work output, thermal efficiency as well as total exergy destruction, extraction of combustible gases from the passage of the combustion chamber and gas turbine for heat recovery steam generator is not favorable. Work output and thermal efficiency increase with an increase in pressure ratio and decrease in air fuel ratio but for minimum total exergy destruction, the pressure ratio should be minimum and air fuel ratio should be maximum.
    Źródło:
    Archives of Thermodynamics; 2021, 42, 1; 147-162
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Runner Geometry on the Gas Entrapment in Volume of Pressure Die Cast
    Autorzy:
    Majernik, J.
    Podařil, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/382678.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    HPDC
    high pressure die casting
    runner dimensions
    air entrapment
    product development
    melt flow
    odlew wysokociśnieniowy
    rynna
    uwięzione powietrze
    przepływ stopu
    Opis:
    The high pressure die casting technology allows the production of complex casts with good mechanical properties, with high production repeatability within narrow tolerance limits. However, the casts are somewhat porous, which may reduce their mechanical properties. There are several recommendations for reducing the porosity of casts, which are aimed at setting the technological parameters of the casting cycle. One of the primary and important ways to reduce the porosity and air entrapment in the melt is a suitable gating system design. Submitted contribution is devoted to assessing the influence of the runner branching geometry on the air entrapment within the cast volume during the filling phase of the casting cycle. Four variants of the gating system for a particular cast are compared with different design of main runner branching. The initial design is based on a real gating system where the secondary runner is connected to the main runner at an angle of 90 °. The modified designs are provided with a continuous transition of the main runner into the secondary ones, with the change in the branching runner radius r1 = 15 mm, r2 = 25 mm and r3 = 35 mm. The air entrapment in the melt is assessed within the cast volume behind the cores, which have been evaluated as a critical points with respect to further mechanical treatment. When designing the structural modification of geometry it was assumed that by branch changing using the radius value r3 = 35 mm, the melt flows fluently, and thus the value of the entrapped air in the volume of the cast will be the lowest. This assumption was disproved. The lowest values of entrapped air in the melt were found in the casts with runner transition designed with radius r1 = 15 mm. The conclusion of the contribution explains the causes of this phenomenon and from a designing point of view it presents proposal for measures to reduce the entrapment of the air in casts.
    Źródło:
    Archives of Foundry Engineering; 2019, 4; 33-38
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

      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