Steam Condensation Cooled by Piezoelectric Driven Oscillating Air Flow

CHENG Ting, HU Ling, WU Yajuan, XIONG Yangheng

Abstract


The piezoelectric (PE) fan is first put forward to use in the air-cooled condenser, and to enhance the exhaust steam condensation of large thermal power plants. The cooling performance of such a method is evaluated through numerical simulations. The study shows that the surface heat transfer coefficient with PE fan at the air side is higher than that of a conventional axial flow (AF) fan. While at the steam side of the tube, the surface heat transfer coefficient is also enhanced owing to the obvious fluctuation of liquid film caused by the vibration of the piezoelectric fan.

Key words: Piezoelectric fan; Air-cooling condenser; Numerical simulation; Surface heat transfer coefficient


Keywords


Piezoelectric fan; Air-cooling condenser; Numerical simulation; Surface heat transfer coefficient

Full Text:

PDF

References


[1] Tawney, R., Khan, Z., & Zachary, J. (2005). Economic and Performance Evaluation of Heat Sink Options in Combined Cycle Applications. Journal of Engineering for Gas Turbines and Power, 127(2), 397-403.

[2] Wilber, K. R., & Zammit, K. (2005). Development of Procurement Guidelines for Air-Cooled Condensers. Advanced Cooling Strategies/Technologies Conference, June 1-2, 2005, Sacramento, California.

[3] Webb, R. L., & Kim, N. H. (2005). Principles of Enhanced Heat Transfer. London: Taylor & Francis.

[4] Yoo, J., Hong, J., & Cao, W. (2000). Piezoelectric Ceramic Bimorph Coupled to Thin Metal Plate as Cooling Fan for Electronic Devices. Sensors and Actuators A: Physical, 79(1), 8-12.

[5] A Kal, N. T., Raman, A., & Garimella, S. (2003). Two-Dimensional Streaming Flows Induced by Resonating, Thin Beams. The Journal of the Acoustical Society of America, 114(4 pt. 1), 1785-95.

[6] Liu, S. F., Huang, R. T., Sheu, W. J., & Wang, C. C. (2009). Heat Transfer by a Piezoelectric Fan on a Flat Surface Subject to the Influence of Horizontal/Vertical Arrangement. International Journal of Heat and Mass Transfer, 52(11-12), 2565-70.

[7] Aaikalin, T., Garimella, S., & Raman, A., et al. (2007). Characterization and Optimization of the Thermal Performance of Miniature Piezoelectric Fans. International Journal of Heat and Fluid Flow, 28(4), 806-20.

[8] Fulford, G. D. (1964). The Flow of Liquids in Thin Films. Advances in Chemical Engineering, 5, 151-236.

[9] Benjamin, T. B. (1957). Wave Formation in Laminar Flow down an Inclined Plane. Journal of Fluid Mechanics, 2(6), 554-73.

[10] Faghri, A., & Seban, R. (1985). Heat Transfer in Wavy Liquid Films. International Journal of Heat and Mass Transfer, 28(2), 506-8.

[11] Ye, X. M., Yan, W. P., Jiang, Z. Y., & Wang, J. (1999). Flow Dynamics and Heat Transfer of Free Falling Wavy Films. Jounal of North China Electric Power University, 26(1), 7-12.

[12] Faghri, A., & Seban, R. (1988). Heat and Mass Transfer to a Turbulent Falling Film. Int. J. Heat Mass Transfer, 31, 891-4.

[13] Lyu, T., & Mudawar, I. (1991). Determination of Wave-Induced Fluctuations of Wall Temperature and Convection Heat Transfer Coefficient in the Heating of a Turbulent Falling Liquid Film. International Journal of Heat and Mass Transfer, 34(10), 2521-34.

[14] Shmerler, J., & Mudawwar, I. (1986). Effects of Interfacial Waves on Heat Transfer to Free-Falling Turbulent Liquid Films. Miami International Symposium on Multi-Phase Transport and Particulate Phenomena, Miami Beach, FL, USA, 15 Dec. 1986.

[15] Jayanti, S., & Hewitt, G. (1996). Hydrodynamics and Heat Transfer of Wavy Thin Film Flow. International Journal of Heat and Mass Transfer, 40(1), 179-90.




DOI: http://dx.doi.org/10.3968%2Fj.est.1923847920120401.345

Refbacks

  • There are currently no refbacks.


Reminder

If you have already registered in Journal A and plan to submit article(s) to Journal B, please click the CATEGORIES, or JOURNALS A-Z on the right side of the "HOME".


We only use three mailboxes as follows to deal with issues about paper acceptance, payment and submission of electronic versions of our journals to databases: caooc@hotmail.com; est@cscanada.net; est@cscanada.org

Copyright © 2010 Canadian Research & Development Centre of Sciences and Cultures
Address: 730, 77e AV, Laval, Quebec, H7V 4A8, Canada

Telephone: 1-514-558 6138
Http://www.cscanada.net Http://www.cscanada.org

E-mail: est@cscanada.net est@cscanada.org