[1] Zhao Zhiwei, Du Kai,. Numerical investigation of condensation of gasoline vaporwith turbulent flow in vertical tubes [J]. Journal of Southeast University (English Edition), 2010, 26 (2): 302-306. [doi:10.3969/j.issn.1003-7985.2010.02.035]

Copy

Numerical investigation of condensation of gasoline vaporwith turbulent flow in vertical tubes()

Share：

Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

26

Issue:

2010 2

Page:

302-306

Research Field:

Energy and Power Engineering

Publishing date:

2010-06-30

Info

Title:

Numerical investigation of condensation of gasoline vaporwith turbulent flow in vertical tubes

Author(s):

Zhao Zhiwei;  Du Kai

School of Energy and Environment, Southeast University, Nanjing 210096, China

Keywords:

gasoline vapor;  condensation;  cascade refrigeration;  condensation rate

PACS:

TE85

DOI:

10.3969/j.issn.1003-7985.2010.02.035

Abstract:

To investigate the characteristics of the condensation in gasoline vapor condensation recovery, the condensation process of gasoline vapor with turbulent flow in a vertical tube is simulated based on the gas-liquid two-phase flow model.An effective diffusion coefficient is used to describe mass diffusion among the species of gasoline vapor.Several variables including temperature, pressure, liquid film thickness and the variation of the Nusselt number in the tube are simulated.The effects of the inlet-to-wall temperature difference and the Reynolds number on the condensation rate and the Nusselt number are obtained by modelling.The results show that heat transfer and condensation can be enhanced significantly by increasing the inlet Reynolds number.However, the increase in the inlet-to-wall temperature difference has little effect on the condensation rate.It is also found that the gasoline vapor condensation rate is influenced greatly by the mass transfer resistance.The comparison of results from the model with previous experiments shows a good agreement.

References:

[1] State Environmental Protection Administration.GB 20952—2007 Emission standard of air pollutant for gasoline filling stations[S].Beijing:China Environmental Science Press, 2007.(in Chinese)
[2] Baumann W W, Thiele F.Heat and mass transfer in evaporating two-component liquid film flow[J].Int J Heat Mass Transfer, 1990, 33(2):267-273.
[3] Braun M, Renz U.Multicomponent diffusion interactions during condensation in laminar and turbulent pipe flow[J].Int J Heat Mass Transfer, 1997, 40(1):131-139.
[4] Yu Hui, Ma Kongjun, Zhu Jiahua, et al.Fogging and filming of high humidity gas flow under effect of cooling surface[J].Journal of Chemical Industry and Engineering, 2006, 157(18):1897-1903.(in Chinese)
[5] Yakhot V, Orszag S A.Renormalization group analysis of turbulence:basic theory[J].Journal of Scientific Computing, 1986, 1(1):3-11.
[6] Launder B E, Spalding D B.Numerical computation of turbulent flows[J].Computer Methods Applied Mechanics Eng, 1974, 3(2):269-289.
[7] Versteeg H K, Malalasckera W.An introduction to fluid dynamic[M].Essex, UK:Addison Wesley Longman Ltd, 1995.
[8] Webb D R, Sardesai R G.Verification of multicomponent mass transfer models for condensation[J].International Journal of Multiphase Flow, 1981, 7(5):507-520.
[9] Nusselt W.Die oberflachen kondensation des wasserdampfes[J].Z Detsch Ing, 1916, 60:541-546.

Memo

Memo:

Biographies: Zhao Zhiwei(1985—), male, graduate;Du Kai(corresponding author), male, professor, du-kai@seu.edu.cn.
Citation: Zhao Zhiwei, Du Kai.Numerical investigation of condensation of gasoline vapor with turbulent flow in vertical tubes[J].Journal of Southeast University(English Edition), 2010, 26(2):302-306.

Common functions