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Wave character of boiling process in coil tube of air cooler

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EN
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EN
The paper describes the results of investigations of dynamics of the boiling process in an air cooler coil tube fed through a thermostatic expansion valve. The influence of the thermostatic expansion valve on the magnitude of disturbances and their propagation velocity in the coil tube is determined. The effect of the degree of refrigerant vapour superheat on the above parameters is also established. Investigations are conducted using an environmentally-friendly refrigerant R404A. The wave character of the boiling process in the coil tube is confirmed.
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Bibliografia
  • [1] BILICKI Z.: The relation between the experiment and theory for nucleate forced boil ing, Proc. of the 4th World Conf. on Experimental Heat Transfer, Fluid Mechanics and Thermodynamics, Brussels, June 2-6, 1997, Vol. 2, 571-578, (Ed. ETS Pisa,
  • [2] BILICKI Z., KARDAŚ D., MICHAELIDES E. E.: Relaxation models for wave phenom ena in liquid vapour bubble flow in channels, J. Fluids Eng., No. 120, 1998, 369 -377.
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  • [7] BOHDAL T.: Investigation of instability during bubbly boiling in channel flow, Fourth Int. Conf. on Multiphase Flow, New Orleans, 27.05-1.06.2001.
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  • [10] BOHDAL T., BILICKI Z.: On the wave character of development of bubble boiling in channel flow, MFTP-2000 Int. Symp. on Multiphase Flow and Transport Phenom ena, Antalya, Turkey, Nov. 2000, Ed. by David Moalem Maron, Begell House, Inc., New York, Wallingford (UK), 520-527.
  • [11] BOHDAL T., BOHDAL A.: Study on the reasons for unstable operation of refrigeration pump units, Refrigerating Engineering 1986, No. 7, 7-11, (in Polish).
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  • [13] MITROVIĆ J., FAUSER J.: Propagation of two-phase fronts during boiling of super heat liquids, Proc. 2nd European Symp. on Fluids in Space, Naples, Italy, 1996.
  • [14] NAKORYYAKOV V. E., POKUSAEV B. G., SHREIBER I. R.: Wave propagation in gas-liquid media, Bergles A.E. (Editor) by CRC Press Inc., Boca Raton 1993.
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  • [16] ZHOU X., WANG Y., XIA J., SHEN B.: Research on dynamic characteristics of dou ble evaporators in VRV air conditioner, Proc. of the Int. Symp. on Air Conditioning in High Rise Buildings, Oct. 2000, Shanghai, 279-283.
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Bibliografia
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bwmeta1.element.baztech-article-BGPK-0673-3184
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