Experimental analysis of gravitational heat pipe using R507 as a working fluid

• Autorzy: Wojtasik K. , Zajączkowski B.
• Języki publikacji: EN

Abstrakty

EN

The paper presents possibility of using R507 as a working fluid in gravitational heat pipe. The outcome of experimental analysis are compared to the results obtained with mathematical model. The simulations allow to calculate fluid and wall temperatures in the thermosyphon. The model equations contain the formulas for boiling and condensing heat transfer coefficients. Proposed new model is in good agreement with real operation of the device, especially at the steady state. There are discrepancies during the start-up process, but the differences between the results obtained by the model and experiments do not exceed 5% at the steady state. The thermal efficiency of the thermosyphon is also determined as 0.63.

Słowa kluczowe

EN

thermosyphon; mathematical model; heat transfer

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Zeszyty Energetyczne
• Rocznik: 2016
• Tom: T. 3
• Strony: 23--32
• Opis fizyczny: Bibliogr. 9 poz., rys., wykr.

Twórcy

autor

Wojtasik K.

• Politechnika Wrocławska, Wydział Mechaniczno-Energetyczny, Katedra Termodynamiki, Teorii Maszyn i Urządzeń Cieplnych

autor

Zajączkowski B.

• Politechnika Wrocławska, Wydział Mechaniczno-Energetyczny, Katedra Termodynamiki, Teorii Maszyn i Urządzeń Cieplnych

Bibliografia

• [1] Tsai T.E., Wu G.W., Chang C.C., Shih W.P., Chen S.L., Dynamic test method for determining the thermal performances of heat pipes, Int. J. Heat Mass Transf., 53(21-22), 4567-4578, 2010.
• [2] Reed J.G., Tien C.L., Modeling of the two-phase closed thermosyphon, Trans. ASME, 109, 722-730, 1987.
• [3] Harley C., Faghri A., Complete transient two-dimensional analysis of two-phase closed thermosyphons including the falling condensate film, Trans. ASME, 116, 418-426, 1994.
• [4] Shabgard H., Xiao B., Faghri A., Gupta R., Weissman W., Thermal characteristics of a closed thermosyphon under various filling conditions, Int. J. Heat Mass Transf., 70, 91-102, 2014.
• [5] Farsi H., Joly J.L, Miscevic M., Platel V., Mazet N., An experimental and theoretical investigation of the transient behavior of a two-phase closed thermosyphon, Appl. Therm. Eng., 23(15), 1895-1912, 2003.
• [6] Zahuri B., Heat Pipe Design and Technology. A practical approach, CRC Press, 2011.
• [7] Tailian C., Water-heated pool boiling of different refrigerants on the outside surface of a horizontal smooth tube, Journal of Heat Transfer, 134(2), 2012.
• [8] Serth R.W., Process Heat Transfer Principles and Applications, 2007.
• [9] Fang X., Zhou Z., Li D., Review of correlations of flow boiling heat transfer coefficients for carbon dioxide, Int. J. Refrig., 36, 2017-2039, 2013.

Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).