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 Wysłany: Sob 19:03, 18 Gru 2010 Temat postu: air jordans Ammonia water mixture pipe Forced Con |
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Ammonia / water mixture pipe Forced Convection Boiling Heat Transfer
Also increases the heat transfer coefficient has a tendency to increase slowly to verify the heat transfer coefficient and less relevant features. Stacks of three to four tiny l5l9 = heat flux q (kW / m) Figure 3 predicted and experimental heat transfer coefficient of heat transfer coefficient and heat flux relationships with three: three 4 stack tiny 00_38O44O. 5O mass percent ammonia content (% 1 directly determines the number Martinelli, Martinelli number on the heat transfer coefficient and thus a greater impact. 6 Conclusion (1) calculated for the analysis of mixture groups of forced convection boiling heat transfer coefficient correlation style, Bennett and Chen comprehensive considerations can improve on this basis, while not a member of Rivera's correlation coefficient of liquid heat transfer factor; (2) For the ammonia / water mixture boiling heat transfer, heat transfer coefficient Bo by the heat flux and less effect, but by the number concentration and Martinelli greater impact on engineering practice and research in the experiments, should pay attention to select the appropriate concentration. References [1] XU Ji Ao. boiling heat transfer and air liquid two-phase [M]. Atomic Energy Press, .1993. [2] BennettDL, ChenJC.Forcedconvectiveboit ~ inverti-caltubesforsaturatedpurecomponentsandbinarymix-tures [J]. A.I.Ch.E.J ,1980,21:721-723. [3] RiveraW, BestR.Boihngheattransfercoefficientsinaverticalsmoothtubeforthe 'blush teI / ammoniaandammonia / lithiumnitratemixtul ~ slJJ.Int.J.HeatMassTransfer, 1999,[link widoczny dla zalogowanych],42 (5) :905-921. [4] WenzelU.Heattransfertomixturesofacetone, iso-propanolandwaterundersubcooledflowboilingcondi-tions-II. PredictionoftheheattransfercoefficientslJJ.Int.J.HeatMassTransfer.1994, 37 (2) :185-194. [5] MishraMPH, VarmaK, SharmaCP.Heattransfercoeffi-eientsinforcedconvectionevaporationofrefrigerantmix-tures [J]. Lett.inHeatandMassTransfer, 1981,8 (1): 127 - 136. [6] E1 a SayedYM, TribusM,[link widoczny dla zalogowanych], Tnermodynamiepropertiesofwa-ter-ammoniamixturestheoreticalimplementationforuseinpowercyclesanalysis [J]. AES, 1985,1 (1) :89-95. [7] Liu Zhigang, et al. thermophysical properties of working fluid preparation and calculation procedures Application [M]. Science Press, 1992. [8] HaarL,[link widoczny dla zalogowanych], eta1.Tnermodynamiepropertiesofammonia [J]. JournalofPhysicalandChemicalReferenceData, 1978,7 (3) :680-689. [9] ReidRC, PrausntitzJM,[link widoczny dla zalogowanych], PolingBE.ThePropertiesofGasesandLiquia [M]. McGrawHill, 1987. Figure 4 Heat transfer coefficient and heat flux density in Figure 4 for the heat transfer coefficient and the relationship between the concentration of ammonia, from the figure Author: Sing Tung Ying (1976 a), female, graduate,[link widoczny dla zalogowanych], ~ gU ~ 11t :: 100085 can be seen that the heat transfer coefficient and concentration of relationships with the dependent variable. concentration and Haidian District, Fourth Street 九号 Quartet Corporation power plant division.
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