Numerical modeling of unsteady state operation of tube and plate fin heat exchangers

• Autorzy: Taler D. , Korzeń A.
• Języki publikacji: EN

Abstrakty

EN

Cross-flow tubular heat exchangers are applied as condensers and evaporators in air conditioners and heat pumps or as air heaters in heating systems. They are also applied as water coolers in so called 'dry' water cooling systems of power plants, as well as car radiators. There are analytical and numerical mathematical models of heat exchangers of that type to determine the steady state temperature distribution of fluids and the rate of heat transferred between fluids. In view of the wide range of applications in practice, these heat exchangers were experimentally examined in steady-state conditions, mostly to determine the overall heat transfer coefficient or the correlation for the heat transfer coefficients on the air side and on the internal surface of the tubes. There exist many references on the transient response of heat exchangers. Most of them, however, focus on the non-steady-state heat transfer processes in parallel and counter flow heat exchangers. In this paper, the new equation set describing transient heat transfer process in tube and fin cross-flow tube exchanger will be given and subsequently solved using the finite volume method.

Słowa kluczowe

EN

tube heat exchanger; transient response; plate-fin mathematical model; experimental validation

• Wydawca: Wrocław University of Technology, Department of Periodics Publications
• Czasopismo: Journal of Energy Science
• Rocznik: 2012
• Tom: Vol. 1, nr 2
• Strony: 103--117
• Opis fizyczny: Bibliogr. 7 poz., rys., tab.

Twórcy

autor

Taler D.

• Cracow University of Technology, Institute of Thermal Engineering and Air Protection, ul. Warszawska 24, 31-155 Krakow, Poland

autor

Korzeń A.

• AGH University of Science and Technology, Department of Power Engineering and Environmental Protection, Al. Mickiewicza 30, 30-059 Krakow, Poland

Bibliografia

• [1] SMITH E. M., Thermal Design of Heat Exchanger, John Wiley & Sons, Chichester, 1997.
• [2] ROETZEL W. AND XUAN Y., Dynamic behaviour of heat exchangers, Computational Mechanics Publications Vol.3, WIT Press, Southampton, 1998.
• [3] TALER D., Dynamics of Tube Heat Exchangers, Publishing House of AGH University of Science and Technology (UNWD), Cracow, 2009 (in Polish).
• [4] TALER D. AND KORZEŃ A., Numerical modeling of heat transfer in plate fins, in: L. Bogusławski (Ed.), Thermodynamics in Science and Technology, Procedings of the 1-st International Congress on Thermodynamics, Poznań, Poland, 4-7 September 2011, p. 655- 664.
• [5] TALER D. AND KORZEŃ A., Modeling of heat transfer in plate fins of complex shape, Rynek Energii, No. 6 (2011), p. 61-65 (in Polish).
• [6] PRESS W.H., TEUKOLSKY S.A., VETTERING W.T. AND FLANNERY B.P., Numerical Recipes, The Art of Scientific Computing, Third Edition, Cambridge University Press, Cambridge, 2007.
• [7] JAREMKIEWICZ M., TALER D. AND SOBOTA T., Measuring transient temperature of the medium in power engineering machines and installations, Applied Thermal Engineering, vol. 29 (2009), p. 3374-3379.