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 "grate" wg kryterium: Temat

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-6 z 6
    Tytuł:
    Calculation of the furnace exit gas temperature of stoker fired boilers
    Autorzy:
    Rutkowski, Łukasz
    Szczygieł, Ireneusz
    Powiązania:
    https://bibliotekanauki.pl/articles/1955002.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    FEGT
    CKTI
    grate
    boiler calculation
    furnace
    Opis:
    In the paper the methodology of furnace exit gas temperature calculations by using well known normative standard method CKTI is presented. There are shown changes in methodology approach for three editions of it and in additional developments. Furnace exit gas temperature for two stoker grate boilers is calculated. By using described methods, it was possible to determine their effectiveness by comparing with measurements. Knowledge of the furnace exit gas temperature allows to define the division into irradiated and convection surfaces, which has an impact on the design features of the boiler as well as its dimensions and weight.
    Źródło:
    Archives of Thermodynamics; 2021, 42, 3; 3-24
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical calculations of WR-40 boiler based on its zero-dimensional model
    Autorzy:
    Hernik, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/185324.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    modelowanie CFD
    kocioł
    spalanie
    ruszt
    CFD modelling
    boilers
    combustion
    grate
    Opis:
    Generally, the temperature of flue gases at the furnace outlet is not measured. Therefore, a special computation procedure is needed to determine it. This paper presents a method for coordination of the numerical model of a pulverised fuel boiler furnace chamber with the measuring data in a situation when CFD calculations are made in regard to the furnace only. This paper recommends the use of the classical 0-dimensional balance model of a boiler, based on the use of measuring data. The average temperature of flue gases at the furnace outlet t”k obtained using the model may be considered as highly reliable. The numerical model has to show the same value of t”k. This paper presents calculations for WR-40 boiler. The CFD model was matched to the 0-dimensional t”k value by means of a selection of the furnace wall emissivity. As a result of CFD modelling, the flue gas temperature and the concentration of CO, CO2, O2 and NOx were obtained at the furnace chamber outlet. The results of numerical modelling of boiler combustion based on volumetric reactions and using the Finite Rate/Eddy-Dissipation Model are presented.
    Źródło:
    Chemical and Process Engineering; 2014, 35, 2; 173-180
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of exhaust gas temperature distribution within a furnace of a stoker fired boiler as a function of its operating parameters
    Autorzy:
    Krawczyk, P.
    Badyda, K.
    Szczygieł, J.
    Młynarz, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/240827.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    exhaust gas temperature measurement
    grate boiler
    aspirated thermocouple
    spaliny
    pomiar
    kocioł rusztowy
    Opis:
    Distribution of the exhaust gas temperature within the furnace of a grate boiler greatly depends on its operating parameters such as output. It has a considerably different character than temperature distributions in other types of boilers (with pulverised or fluidised bed), as it varies considerably across the chamber. Results presented in this paper have been obtained through research of a grate-fired hot water boiler with a nominal rating of some 30 MW. Measurements have been taken by introducing temperature sensors into prearranged openings placed in the boiler side walls. Investigation has been carried out for different output levels. Tests involved thermocouples in ceramic coating and aspirated thermocouples. The latter were used to eliminate influence of radiative heat transfer on measured results. Values obtained with both methods have been cross-checked.
    Źródło:
    Archives of Thermodynamics; 2015, 36, 3; 3-14
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Effect of Cooling Agent on Stress and Deformation of Charge-loaded Cast Pallets
    Autorzy:
    Bajwoluk, A.
    Gutowski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/382504.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    information technology
    foundry industry
    cast grate
    thermal stresses
    heat treatment equipment
    technologia informacyjna
    przemysł odlewniczy
    paleta odlewnicza
    naprężenia cieplne
    obróbka cieplna
    Opis:
    The results of research on the effect of the type of cooling agent used during heat treatment and thermal-chemical treatment on the formation of temperature gradient and stress-deformation distribution in cast pallets, which are part of furnace accessories used in this treatment, are disclosed. During operation, pallets are exposed to the effect of the same conditions as the charge they are carrying. Cyclic thermal loads are the main cause of excessive deformations or cracks, which after some time of the cast pallet operation result in its withdrawal due to damage. One of the major causes of this damage are stresses formed under the effect of temperature gradient in the unevenly cooled pallet construction. Studies focused on the analysis of heat flow in a charge-loaded pallet, cooled by various cooling agents characterized by different heat transfer coefficients and temperature. Based on the obtained temperature distribution, the stress distribution and the resulting deformation were examined. The results enabled drawing relevant conclusions about the effect of cooling conditions on stresses formed in the direction of the largest temperature gradient.
    Źródło:
    Archives of Foundry Engineering; 2017, 17, 4; 13-18
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design Options to Decrease the Thermal Stresses in Cast Accessories for Heat and Chemical Treatment Furnaces
    Autorzy:
    Bajwoluk, A.
    Gutowski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/380577.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    information technology
    foundry industry
    cast grate
    thermal stress
    heat treatment equipment
    technologia informatyczna
    przemysł odlewniczy
    paleta odlewnicza
    naprężenie termiczne
    obróbka cieplna
    Opis:
    By the very nature of their work, castings used in furnaces for heat treatment and thermo-chemical treatment are exposed to the effect of many unfavorable factors causing their deformation and cracking, significantly shortening the lifetime. The main source of damage are the micro-and macro-thermal stresses appearing in each cycle. As the cost of furnace instrumentation forms a significant part of the total furnace cost, in designing this type of tooling it is important to develop solutions that delay the damage formation process and thus extend the casting operation time. In this article, two structural modifications introduced to pallets castings to reduce thermal stresses arising at various stages of the cooling process are proposed. The essence of the first modification consists in making technological recesses in the wall connections, while the aim of the second one is to reduce the stiffness of the pallet by placing expanders in the external walls. Using the results of simulation analyses carried out by the finite element method, the impact of both proposed solutions on the level of thermal stresses was evaluated.
    Źródło:
    Archives of Foundry Engineering; 2018, 18, 4; 125-130
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Castings in Pit Furnaces for Heat Treatment
    Autorzy:
    Drotlew, A.
    Piekarski, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/380488.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technology
    innovative foundry material
    heat treatment plant
    cast grate
    pit furnace
    innowacyjna technologia odlewnicza
    innowacyjny materiał odlewniczy
    zakład obróbki cieplnej
    paleta odlewnicza
    piec grzewczy
    Opis:
    The article presents examples of typical designs of the cast technological equipment used in pit furnaces for the heat treatment of metals and alloys. The equipment consists of a set of castings connected together in a proper way and used for the formation and transport of charge, which consists of the heat treated parts. Typical equipment has the shape of a cylinder. Usually it comprises a basic pallet (carrier) completed with other elements, i.e. intermediate pallets, rods, spacers, cross-bars and hooks, their number depending on the number and shape of heat-treated products and on production volume. The simplest design solution is to use a cylindrical basket where heat treated products are arranged in a loose configuration. The majority of elements forming the furnace equipment are castings produced in sand molds. Some of them were designed and manufactured in a Foundry of the West Pomeranian University of Technology in Szczecin.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 3 spec.; 11-14
    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