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2013 | 34 | 1 | 5-16
Tytuł artykułu

The Effect of Regulating Elements on Convective Heat Transfer along Shaped Heat Exchange Surfaces

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
The paper deals with a study of the effect of regulating elements on local values of heat transfer coefficients along shaped heat exchange surfaces with forced air convection. The use of combined methods of heat transfer intensification, i.e. a combination of regulating elements with appropriately shaped heat exchange areas seems to be highly effective. The study focused on the analysis of local values of heat transfer coefficients in indicated cuts, in distances expressed as a ratio x/s for 0; 0.33; 0.66 and 1. As can be seen from our findings, in given conditions the regulating elements can increase the values of local heat transfer coefficients along shaped heat exchange surfaces. An optical method of holographic interferometry was used for the experimental research into temperature fields in the vicinity of heat exchange surfaces. The obtained values correspond very well with those of local heat transfer coefficients αx, recorded in a CFD simulation.
Wydawca

Rocznik
Tom
34
Numer
1
Strony
5-16
Opis fizyczny
Daty
wydano
2013-03-01
online
2013-04-02
Twórcy
  • Technical University in Zvolen, Faculty of Environmental and Manufacturing Technology, Department of Environmental Technology, Studentska 26, 960 53 Zvolen, Slovakia, cernecky@tuzvo.sk
autor
  • Technical University in Zvolen, Faculty of Environmental and Manufacturing Technology, Department of Environmental Technology, Studentska 26, 960 53 Zvolen, Slovakia
  • Technical University in Zvolen, Faculty of Environmental and Manufacturing Technology, Department of Environmental Technology, Studentska 26, 960 53 Zvolen, Slovakia
Bibliografia
  • Bergman T.L., Lavine A.S., Incropera F.P., Dewitt D.P., 2011. Fundamentals of heat and mass transfer. 7th edition, John Wiley & Sons.
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  • Fehle F., Klas J., Mayinger F., 1995. Investigation of local heat transfer in compact heat exchangers by holographic interferometry. Exp. Thermal Fluid Sci., 10, 181-191. DOI: 10.1016/0894-1777(94)00088-P.[Crossref]
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  • Herman C., Kang E. 2002. Heat transfer enhancement in a grooved channel with curved vanes. Int. J. Heat MassTransfer, 45, 3741-3757. DOI: S0017-9310(02)00092-3.
  • Islamoglu Y., Parmaksizoglu C., 2003. The effect of channel height on the enhanced heat transfer characteristics in a corrugated heat exchanger channel. Appl. Thermal Eng., 23, 979-987. DOI: 10.1016/S1359-4311(03)00029-2.[Crossref]
  • Kilicaslan I., Sarac H.I., 1998. Enhancement of heat transfer in compact heat exchanger by different type of rib with holographic interferometry. Exp. Thermal Fluid Sci., 17, 339-346. DOI: 10.1016/S0894-1777(98)00006-5.[Crossref]
  • Lienhard J.H. IV, Lienhard J.H. V, 2006. A heat transfer textbook. 3th edition, Phlogiston Press, Cambridge, Massachusetts, USA.
  • Martynenko O.G., Khramtsov P.P., 2005. Free-Convective Heat Transfer. Springer Verlag, Berlin.
  • Merzkirch W. 1974. Flow visualization. Academic Press, London.
  • Pavelek M., Janotková E., Štětina J., 2007. Vizualizační a optické měřicí metody. 2nd edition, VUT, Brno, available at: http://ottp.fme.vutbr.cz/users/pavelek/optika/.
  • Pavelek M., Štětina J., 1997. Experimentální metody v technice prostředí. VUT Brno.
  • Tauscher R., 2000. Wärmeübergang mit Turbulenzanregung bei niedrigen Reynoldszahlen. Dissertation. München, Technische Universität.
  • Vest Ch.M., 1979. Holographic interferometry. New York, John Wiley.
  • Zhang J., Kundu J., Manglik R.M. 2004. Effect of fin waviness and spacing on the lateral vortex structure and laminar heat transfer in wavy-plate-fin cores. Int. J. Heat Mass Transfer, 47, 1719-1730. DOI: 10.1016/j.ijheatmasstransfer.2003.10.006.[Crossref]
Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.-psjd-doi-10_2478_cpe-2013-0002
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