Abstract
Conservation equations for sensible and latent entransy are established for flue gas turbulent heat transfer with condensation in a tube, and the entransy dissipation expression is deduced. The field synergy equation is obtained on the basis of the extremum entransy dissipation principle for flue gas turbulent heat transfer with condensation. The optimal velocity field is numerically obtained by solving the field synergy equation. The results show that the optimal velocity field contains multiple longitudinal vortices near the tube surface. These improve the synergy not only between the velocity and temperature fields but also between the velocity and vapor concentration fields. Therefore, the turbulent heat and mass transfers are significantly enhanced.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
Zhang X H, Liu D W. Evaluation of reclaiming technology for gas-fired boiler flue gas residual heat (in Chinese). Industrial Boiler, 2008, 4: 4–8
Jia L, Peng X F, Sun J D, et al. Theoretical analysis on heat transfer in flue gas with vapor condensation (in Chinese). J Therm Sci Tech, 2002, 1: 15–19
Jia L, Peng X F. Research on convective condensation heat transfer for mixture gas in a vertical tube (in Chinese). Industrial Heating, 2002, 5: 28–30
Li X P, Jia L, Sun J D. An experimental study on convection condensing heat transfer of wet flue gas in a vertical tube (in Chinese). J Beijing Institute Eng Arch, 2002, 18: 19–23
Jia L, Peng X F, Yan Y, et al. Effects of water vapor condensation on the convection heat transfer of wet flue gas in a vertical tube. Int J Heat Mass Transfer, 2001, 44: 4257–4265
Jia L, Peng X F. Heat transfer in flue gas with vapor condensation. Tsinghua Sci Tech, 2002, 7: 177–181
Jia L, Peng X F. Research on convective condensation heat transfer for a gas mixture in a vertical tube. Heat Transfer-Asian Res, 2004, 33: 219–228
Bejan A. Advanced Engineering Thermodynamics. New York: Wiley, 1997
Guo Z Y, Zhu H Y, Liang X G. Entransy—A physical quantity describing heat transfer ability. Int J Heat Mass Transfer, 2007, 50: 2545–2556
Guo Z Y, Liang X G, Zhu H Y. Entransy—A physical quantity describing heat transfer ability (in Chinese). Pro Natural Sci, 2006, 16: 1288–1296
Xia S J, Chen L G, Sun F R. Entransy dissipation minimization for liquid-solid phase processes. Sci China: Tech Sci, 2010, 53: 960–968
Xiao Q H, Chen L G, Sun F R. Constructal entransy dissipation rate and flow-resistance minimizations for cooling channels. Sci China: Tech Sci, 2010, 53: 2458–2468
Xie Z H, Chen L G, Sun F R. Constructal optimization on T-shaped cavity based on entransy dissipation minimization. Chinese Sci Bull, 2009, 54: 4418–4427
Wei S H, Chen L G, Sun F R. Constructal optimization of discrete and continuous variable cross-section conducting path based on entransy dissipation rate minimization. Sci China: Tech Sci, 2010, 53: 1666–1677
Xie Z H, Chen L G, Sun F R. Constructal optimization of twice level Y-shaped assemblies of fins by taking maximum thermal resistance minimization as objective. Sci China: Tech Sci, 2010, 53: 2756–2764
Xia S J, Chen L G, Sun F R. Optimization for entransy dissipation minimization in heat exchanger. Chinese Sci Bull, 2009, 54: 3587–3595
Wu J, Cheng X G, Meng J A, et al. Potential capacity dissipation extremum and entropy generation minimazation in laminar convective heat transfer (in Chinese). J Eng Thermophys Chin, 2006, 27: 100–102
Chen Q, Wu J, Ren J X. Thermodanamic optimization and heat transfer optimization for convective heat transfer (in Chinese). J Eng Thermophys Chin, 2008, 29: 271–274
Liu X B, Meng J A, Guo Z Y. Entropy generation extremum and entransy dissipation extremum for heat exchanger optimization. Chinese Sci Bull, 2009, 54: 943–947
Chen Q, Wang M R, Pan N, et al. Optimization principles for convective heat transfer. Energy, 2009, 34: 1199–1206
Liu X B, Guo Z Y. A novel method for heat exchanger analysis (in Chinese). Acta Phys Sin, 2009, 58: 4766–4771
Chen L, Chen Q, Li Z, et al. Optimization for a heat exchanger couple based on the minimum thermal resistance principle. Int J Heat Mass Transfer, 2009, 52: 4778–4784
Meng J A, Liang X G, Li Z X. Field synergy optimization and enhanced heat transfer by multi-longitudinal vortices flow in tube. Int J Heat Mass Transfer, 2005, 48: 3331–3337
Song W M, Meng J A, Li Z X. Optimal velocity field for laminar convective heat transfer in rectangular channel (in Chinese). J Eng Thermophys Chin, 2011, 32: 133–136
Chen Q, Ren J X, Meng J A. Field synergy equation for turbulent heat transfer and its application. Int J Heat Mass Transfer, 2007, 50: 5334–5339
Chen Q, Yang K D, Wang M R, et al. A new approach to analysis and optimization of evaporative cooling system I: Theory. Energy, 2010, 35: 2448–2454
Song W M, Meng J A, Li Z X. Optimization of flue gas convective heat transfer with condensation in a rectangular channel. Chinese Sci Bull, 2011, 56: 263–268
Chen Q, Xu W. A zero-equation turbulence model for indoor air flow simulation. Energ Buildings, 1998, 28: 137–144
Zhao B, Li X, Yan Q. A simplified system for indoor airflow simulation. Build Environ, 2003, 38:543–552
Author information
Authors and Affiliations
Corresponding author
Additional information
This article is published with open access at Springerlink.com
Rights and permissions
This article is published under an open access license. Please check the 'Copyright Information' section either on this page or in the PDF for details of this license and what re-use is permitted. If your intended use exceeds what is permitted by the license or if you are unable to locate the licence and re-use information, please contact the Rights and Permissions team.
About this article
Cite this article
Song, W., Meng, J. & Li, Z. Optimization of flue gas turbulent heat transfer with condensation in a tube. Chin. Sci. Bull. 56, 1978–1984 (2011). https://doi.org/10.1007/s11434-011-4533-9
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11434-011-4533-9