Browsing by Author "Bukin, V. G."

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    Einfluß der Oberflächenporosität und Ölkonzentration auf den Wärmeübergang der Kältemittel R12 und R22 in berieselten Wärmetauschern
    (1990) Bukin, V. G.; Danilova, Galina N.; Djundin, V. A.; Pertschi, Ottmar (Übersetzer)
    The effect was studied of heat flux d. pressure, spray-liq. properties, spray d., porous layer structure, etc. on the heat transfer during boiling of R12 and R22 in a spray evaporator. Expts. were carried out in a tube bundle (tube diam. 20 mm) with a porous coating of Cu and stainless steel (thickness 100 - 1000 micro-m) at a heat flux d. of 1 - 25 kW/m². The results are compared with those obtained on a smooth pipe with no coating. For R12 at a satn. temp. of -30°, stable boiling was obsd. in coated tubes at a heat flux d. of 1 kW/m², whereas for smooth tubes similar boiling was obsd. onyl at 15 kW/m². The heat transfer coeff. on the tube surface was 2 - 5 times and 10 - 20 times larger than that for smooth tubes under spray and submerged conditions, resp.
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    Intensivierung des Wärmeübergangs beim Verdampfen von Kältemitteln bei geringen Wärmestromdichten
    (1977) Danilova, A. A.; Borisanskaja, A. V.; Djundin, V. A.; Malkov, L. S.; Gujgo, E. I.; Bukin, V. G.; Kozyrev, A. A.; Maljugin, G. I.; Pertschi, Ottmar (Übersetzer)
    The experimental results are presented on different ways of enhancement of heat transfer with Freon and ammonia boiling on horizontal tubes and in vertical channels. High rate is established of boiling heat tranfer on porous and screened coatings, in a falling-down film and in slots.
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    Wärmeübergang beim Sieden von R12 an mehrreihigen Glattrohrbündeln
    (1987) Rebrov, P. N.; Bukin, V. G.; Pertschi, Ottmar (Übersetzer)
    The effect of saturation temperature, heat flux density and number of rows of tubes on the heat transfer was studied in boiling of R-12. A correlation is presented for the heat transfer coefficient with the heat flux and saturation pressure. The experimental heat transfer data for bundles with a vertical row are valid only for fully developed boiling.
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    Der Wärmeübergang beim Verdampfen und Sieden von Freon-Ölgemischen in berieselten Verdampfern von Kälteanlagen
    (1978) Bukin, V. G.; Danilova, Galina N.; Djundin, V. A.; Pertschi, Ottmar (Übersetzer)
    In Untersuchungen, die in früheren Jahren im Leningrader Technologischen Institut der Kälteindustrie durchgeführt wurden, wurden Ähnlichkeitsgleichungen ermittelt, mit denen der Wärmeübergang in Berieselungsverdampfern mit horizontalen Rohren, die auf der Basis reiner Kältemittel arbeiten, berechnet werden können.