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Wyszukujesz frazę "intensification of heat" wg kryterium: Temat

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    Wyświetlanie 1-3 z 3
    Tytuł:
    Determination of the Specific Heat Flux During Boiling of the Dispersed Phase of the Emulsion
    Autorzy:
    Pavlenkо, Anatoliy
    Koshlak, Hanna
    Basok, Borys
    Hrabova, Tatiana
    Powiązania:
    https://bibliotekanauki.pl/articles/27315739.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Koszalińska. Wydawnictwo Uczelniane
    Tematy:
    steam explosion
    homogenisation
    boiling
    intensification of heat
    mass transfer
    Opis:
    The intensity of heat exchange between the boiling emulsion and the enclosing surfaces is associated with the physical phenomena of the formation, growth, and destruction of vapour bubbles of the low-boiling component in the liquid phase. This article presents a methodology to assess the intensity of heat exchange processes. Using this technique, it is possible to predict the energy parameters of heat exchange equipment and the degree of intensification of heat transfer processes.
    Źródło:
    Rocznik Ochrona Środowiska; 2023, 25; 16--24
    1506-218X
    Pojawia się w:
    Rocznik Ochrona Środowiska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental studies on the effect of the enhancemet of the heating surface on the heat transfer coefficient for boiling in closed volume
    Autorzy:
    Grabowski, M.
    Błachnio, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/95221.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Koszalińska. Wydawnictwo Uczelniane
    Tematy:
    boiling
    boiling on enhanced surfaces
    heat transfer coefficient
    Intensification of heat exchange
    LabView
    wrzenie
    wrzenie na wzmocnionych powierzchniach
    współczynnik przenikania ciepła
    intensyfikacja wymiany ciepła
    Opis:
    This article presents the results of experimental research on the effect of enhancing the heating surface on the heat transfer coefficient for boiling in a closed volume of ethyl alcohol and isopropyl alcohol. The aim of the research was determination of the impact of heat surfaces enhancements by applying circular cavities on heat transfer coefficient and on vapor structures formation during boiling. The study involved three brass samples with diameters equal to 50 mm, with different enhancements of the heating surface by drilled blind cavities. The research includes investigation of sample without cavities, sample with 133 circular cavities of diameter of 2 mm and sample with 61 circular cavities of diameter of 3 mm. On the basis of the research, the influence of the investigated heat exchange surface enhancement on the intensity of heat exchange was determined. The author’s own interface in the LabView environment for controlling and acquiring measurement data was developed. The boiling process was recorded with a high-speed camera, and based on the obtained video images, the recorded images were analyzed to determine the void fraction. The heat flux density, heat transfer coefficient were calculated and comparative diagrams of the obtained measurement results were made.
    Źródło:
    Journal of Mechanical and Energy Engineering; 2018, 2, 2; 121-130
    2544-0780
    2544-1671
    Pojawia się w:
    Journal of Mechanical and Energy Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Performance analyses of helical coil heat exchangers. The effect of external coil surface modification on heat exchanger effectiveness
    Autorzy:
    Andrzejczyk, R.
    Muszyński, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/240706.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    effectiveness
    heat transfer intensification
    number of transfer unit
    helical coil
    skuteczność
    intensyfikacja wymiany ciepła
    liczba jednostek przesyłowych
    spirala
    Opis:
    The shell and coil heat exchangers are commonly used in heating, ventilation, nuclear industry, process plant, heat recovery and air conditioning systems. This type of recuperators benefits from simple construction, the low value of pressure drops and high heat transfer. In helical coil, centrifugal force is acting on the moving fluid due to the curvature of the tube results in the development. It has been long recognized that the heat transfer in the helical tube is much better than in the straight ones because of the occurrence of secondary flow in planes normal to the main flow nside the helical structure. Helical tubes show good performance in heat transfer enhancement, while the uniform curvature of spiral structure is inconvenient in pipe installation in heat exchangers. Authors have presented their own construction of shell and tube heat exchanger with intensified heat transfer. The purpose of this article is to assess the influence of the surface modification over the performance coefficient and effectiveness. The experiments have been performed for the steady-state heat transfer. Experimental data points were gathered for both laminar and turbulent flow, both for co current- and countercurrent flow arrangement. To find optimal heat transfer intensification on the shell-side authors applied the number of transfer units analysis.
    Źródło:
    Archives of Thermodynamics; 2016, 37, 4; 137-159
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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