Experimental investigation of heat transfer performance coefficient in tube bundle of shell and tube heat exchanger in two-phase flow

• Autorzy: Karaś M , Zając D. , Ulbrich R.

Identyfikatory

DOI

10.2478/aoter-2014-0006

• Języki publikacji: EN

Abstrakty

EN

This paper presents the results of studies in two phase gasliquid flow around tube bundle in the model of shell tube heat exchanger. Experimental investigations of heat transfer coefficient on the tubes surface were performed with the aid of electrochemical technique. Chilton-Colburn analogy between heat and mass transfer was used. Twelve nickel cathodes were mounted on the outside surface of one of the tubes. Measurement of limiting currents in the cathodic reduction of ferricyanide ions on nickel electrodes in aqueous solution of equimolar quantities of K₃Fe(CN)₆ and K₄Fe(CN)₆ in the presence of NaOH basic solution were applied to determine the mass transfer coefficient. Controlled diffusion from ions at the electrode was observed and limiting current plateau was measured. Measurements were performed with data acquisition equipment controlled by software created for this experiment. Mass transfer coefficient was calculated on the basis of the limiting current measurements. Results of mass transfer experiments (mass transfer coefficient) were recalculated to heat transfer coefficient. During the experiments, simultaneously conducted was the the investigation of two-phase flow structures around tubes with the use of digital particle image velocimetry. Average velocity fields around tubes were created with the use of a number of flow images and compared with the results of heat transfer coefficient calculations.

Słowa kluczowe

EN

two-phase flow; heat transfer coefficient; tube bundle; heat exchanger; DPIV

PL

przepływ dwufazowy; współczynnik wnikania ciepła; pęk rur; wymiennik ciepła; DPIV

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN ; Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archives of Thermodynamics
• Rocznik: 2014
• Tom: Vol. 35, no. 1
• Strony: 87--98
• Opis fizyczny: Bibliogr. 12 poz., il.

Twórcy

autor

Karaś M

• Opole University of Technology, Department of Environmental Engineering, Prószkowska 76, 45-758 Opole, Poland

autor

Zając D.

• Opole University of Technology, Department of Environmental Engineering, Prószkowska 76, 45-758 Opole, Poland

autor

Ulbrich R.

• Opole University of Technology, Department of Environmental Engineering, Prószkowska 76, 45-758 Opole, Poland

Bibliografia

• [1] Bieniasz B.: Convective mass/heat transfer for the sheet rotors of the rotary regenerator. Publishing house of Rzeszów University of Technology, Rzeszów 2005 (in Polish).
• [2] Burnside B.M., Miller K.M., McNeil D.A., Bruce T.: Flow velocities in an experimental kettle reboiler determined by particle image velocimetry. Int. J. Heat Mass Transfer 48(2004), 1000–1016.
• [3] Chilton T.H., Colburn A.P.: Mass transfer (absorption) coefficients prediction from data on the heat transfer and fluid friction. Ind. Eng. Chem. 26(1934), 1183–1187.
• [4] Grant I.D.R., Murray I.: Pressure drop on the shell-side of a segmentally baffeled shell-and-tube with horizontal two phase flow. NEL Report 560(1974).
• [5] Grant I.D.R., Murray I.: Pressure drop on the shell-side of a segmentally baffeled shell-and-tube with vertical two phase flow. NEL Report 500(1972).
• [6] Iwaki C., Cheong K.H., Monji H., Matsui G.: PIV measurement of the vertical cross-flow structure over tube bundles. Exp. Fluids 37(2004), 350–363.
• [7] Iwaki C., Cheong K.H., Monji H., Matsui G.: Vertical, bubbly, cross-flow characteristics over tube bundles. Exp. Fluids, 39(2005), 1024–1039.
• [8] Karaś M., Zając D., Ulbrich R.: Simultaneous two-phase flow structures characteristics and heat exchange coefficient examination over tube bundle. Proc. 14th Int. Symp. Heat Transfer and Renewable Sources of Energy, Szczecin-Międzyzdroje 2012, 349-380.
• [9] Siejka K.: Irregularity of heat exchange with two phase flow around tube bundle. PhD thesis, Opole UT, Opole 2006 (in Polish).
• [10] Ulbrich R., Mewes D.: Vertical, upward gas-liquid two-phase flow across a tube bundle. Int. J. Multiphase Flow (1994), 279–294.
• [11] Wilk J.: Experimental investigation of convective mass/heat transfer in short minichannel at low Reynolds numbers. Exp. Ther. Fluid Sci. 33(2009), 267–272.
• [12] Zając D., Ulbrich R.: Non invasive experimental methods of two phase gas-liquid flow analysis. Publ. House of Opole UT, Studies and Monographies – Opole UT, Vol. 174, Opole 2005, ISSN 1429-6063 (in Polish).

Uwagi

EN

This research was supported by Polish Ministry of Science and Higher Education research grant 4790/B/T02/2010/3.