DOI QR코드

DOI QR Code

Experimental study on enhancement of drying efficiency of organic solvent using ionic wind

이온풍을 이용한 유기용매의 건조 효율 향상에 관한 실험적 연구

  • Lee, Jae Won (School of Mechanical Engineering, Sungkyunkwan University) ;
  • Sohn, Dong Kee (School of Mechanical Engineering, Sungkyunkwan University) ;
  • Ko, Han Seo (School of Mechanical Engineering, Sungkyunkwan University)
  • Received : 2019.04.08
  • Accepted : 2019.04.22
  • Published : 2019.04.30

Abstract

'Ionic wind' is phenomenon induced by corona discharge which occurs when large electric potential is applied to electrodes with high curvature. The ionic wind has advantage that it could generate forced convective flow without any external energy like separate pump. In this study, 'pin-mesh' arrangement is utilized for experiments. First, optimization of configuration is conducted with local momentum of ionic wind behind the mesh. Empirical equation for prediction about velocity profile was derived using the measured results. Secondly, the enhancement of mass transfer rate of acetone with ionic wind was analyzed. Also, the drying efficiency using a fan which has same flow rate was compared with ionic wind for identification of additional chemical reaction. At last, the drying process of organic solvent was visualized with image processing. As a result, it was shown that the use of ionic wind could dry organic matter four times faster than the natural condition.

GSSGB0_2019_v17n1_43_f0001.png 이미지

Fig. 1. Experimental setup for measurements of velocity of ionic wind

GSSGB0_2019_v17n1_43_f0002.png 이미지

Fig. 2. Schematic of mockup with located electrodes

GSSGB0_2019_v17n1_43_f0003.png 이미지

Fig. 3. Mesh electrodes with various hole diameters

GSSGB0_2019_v17n1_43_f0004.png 이미지

Fig. 4. Measurement method for reduction of intensity by time; a) Before use of MTC and b) After use of MTC

GSSGB0_2019_v17n1_43_f0005.png 이미지

Fig. 5. Procedure of image processing for drying efficiency; a) Photographed images during experiment, b) Histogram analysis for binarization and c) Counting pixels in binarized images

GSSGB0_2019_v17n1_43_f0006.png 이미지

Fig. 6. Comparison between measured velocity and empirical model according to electric potential for a) 6kV, b) 7kV, c) 8kV, d) 9kV and e) 10kV

GSSGB0_2019_v17n1_43_f0007.png 이미지

Fig. 7. Comparison between measured velocity and empirical model according to hole diameter for a) 6mm, b) 10mm and c) 16mm

GSSGB0_2019_v17n1_43_f0008.png 이미지

Fig. 8. Schematic of electric field and magnitude of velocity of ionic wind for a) D = 6mm and b) D = 16mm

GSSGB0_2019_v17n1_43_f0009.png 이미지

Fig. 9. Reduction of acetone mass by time with and without ionic wind for various contact diameters

GSSGB0_2019_v17n1_43_f0010.png 이미지

Fig. 10. Electric efficiency for different contact area with ionic wind and fan

GSSGB0_2019_v17n1_43_f0011.png 이미지

Fig. 11. Reduction of normalized reflected intensity according to time with and without ionic wind

Table 1. Maximum velocity of ionic wind and empirical constant for various hole diameters of mesh

GSSGB0_2019_v17n1_43_t0001.png 이미지

Acknowledgement

Supported by : 한국연구재단

References

  1. Fridman, A. Chirokov, A. and Gutsol, A., 2005, "Non-Thermal Atmospheric Pressure Discharges," J. Phys. D: Appl. Phys., Vol. 38, pp.1-24. https://doi.org/10.1088/0022-3727/38/1/001
  2. Robinson, M., 1961, "A History of the Electric Wind," Am. J. Phys., Vol. 28, pp.366-371.
  3. Johnson, M. J. and Go, D. B., 2017, "Recent Advances in Electrohydrodynamic Pumps," Plasma. Sources. Sci. T. Vol. 26, pp.1-27.
  4. Zhao, L. and Adamiak. K., 2016, "EHD Flow Produced by Electric Corona Discharge in Gases from Fundamental Studies to Applications : a Review," Particul. Sci. Technol Vol. 34, pp.63-71. https://doi.org/10.1080/02726351.2015.1043677
  5. Muller, S. and Zahn, R. -J., 2007, "Air-Pollution Control by Non-Thermal Plasma," Contrib. Plasma. Phys. Vol. 47, pp.520-529. https://doi.org/10.1002/ctpp.200710067
  6. Moreau, E., 2007, "Airflow Control by Non-Thermal Plasma Actuators," J. Phys. D: Appl. Phys Vol. 40, pp.605-636. https://doi.org/10.1088/0022-3727/40/3/S01
  7. Chun, Y. N., 2006, "Numerical Modeling of Wire Electrohydrodynamic flow in a Wire-Plate ESP," Environ. Eng. Res. Vol.11, pp.164-171. https://doi.org/10.4491/eer.2006.11.3.164
  8. Johnson, M. J., Tirumala, R. and Go, D. B., 2015, "Analysis of Geometric Scaling of Miniature, Multi-Electrode Assisted Corona Discharges for Ionic Wind Generation," J. Electrostat. Vol. 74, pp.8-14. https://doi.org/10.1016/j.elstat.2014.12.001
  9. Li, L., Lee, S. J., Kim, W. and Kim, D., 2015, "An Empirical Model for Ionic Wind Generation by a Needle-to-Cylinder DC Corona Discharge," J. Electrostat. Vol. 73, pp.125-130. https://doi.org/10.1016/j.elstat.2014.11.001
  10. Meng, X., Zhang, H. and Zhu, J., 2008, "A General Empirical Formula of Current-Voltage Characteristics for Point-to-Plane Geometry Corona Discharges," J. Phys. D: Appl. Phys. Vol. 41, pp.1-10. https://doi.org/10.1051/epjap:2007176
  11. Moon, J. D., Hwang, D. H. and Geum, S. T., 2009, "An EHD Gas Pump Utilizing a Ring-Needle Electrode," IEEE. T. Dielect. El. In. Vol. 16(2), pp.352-358. https://doi.org/10.1109/TDEI.2009.4815163
  12. Shaughnessy, E. J. and Solomon, G. S., 2007, "Electrohydrodynamic Pressure of the Point-toPlane Corona Discharge," Aerosol. Sci. Tech. Vol. 14, pp.193-200.
  13. Tsui, Y. Y., Huang, Y. X., Lan, C. C. and Wang, C. C., 2017, "A Study of Heat Transfer Enhancement via Corona Discharge by Using a Plate Corona Electrode," J. Electrostat. Vol. 87, pp.1-10. https://doi.org/10.1016/j.elstat.2017.02.003
  14. Zhang, Y., Liu, L. L., Chen, Y. and Ouyang, J., 2015, "Characteristics of Ionic Wind in Needle to Ring Corona Discharge," J. Electrostat. Vol. 74, pp.15-20. https://doi.org/10.1016/j.elstat.2014.12.008
  15. Artana, G., D'Adamo, J., Leger, L., Moreau, E. and Touchard, G. G., 2002, "Flow Control with Electrohydrodynamic Actuators," AIAA. J. Vol. 40, pp. 1773-1779. https://doi.org/10.2514/2.1882
  16. Leger, L., Moreau, E. and Touchard, G. G., 2002, "Effect of a DC Corona Electrical Discharge on the Airflow along a Flat Plate," IEEE. T. Ind. Appl. Vol. 38, pp.1478-1485. https://doi.org/10.1109/TIA.2002.804769
  17. Liang, W. J. and Lin, T. H., 1994, "The Characteristics of Ionic Wind and Its Effect on Electrostatic Precipitators," Aerosol. Sci. Tech. Vol. 20, pp.330-344. https://doi.org/10.1080/02786829408959689
  18. Yamamoto, T. and Velkoff, H. R., 1981, "Electrohydrodynamics on an Electrostatic Precipitator," J. Fluid. Mech. Vol. 108, pp.1-18. https://doi.org/10.1017/S002211208100195X
  19. Kim, B., Lee, S., Lee, Y. S. and Kang, K. H., 2012, "Ion Wind Generation and the Application to cooling," J. Electrostat. Vol. 70, pp.438-444. https://doi.org/10.1016/j.elstat.2012.06.002
  20. Wang, T. H., Peng, M., Wang, X. D. and Yan, W. M., 2017, "Investigation of Heat Transfer Enhancement by Electrohydrodynamics in a Double-Wall-Heated Channel," Int. J. Heat. Mass. Tran. Vol. 113, pp.373-383. https://doi.org/10.1016/j.ijheatmasstransfer.2017.05.079
  21. Scholtz, V., Pazlarova, J., Souskova, H., Khun, J. and Julak, J., 2015, "Nonthermal plasma-A tool for decontamination and disinfection," Biotechnol Adv Vol. 33, pp.1108-1119. https://doi.org/10.1016/j.biotechadv.2015.01.002
  22. Lai, F. C. and Lai, K. -W., 2002, "EHD-Enhanced Drying With Wire Electrode," Dry. Technol. Vol. 20, pp.1393-1405. https://doi.org/10.1081/DRT-120005858
  23. Wonly, A., 1992, "Intensification of the Evaporation Process by Electric Field," Chem. Eng. Sci. Vol. 47, pp.551-554. https://doi.org/10.1016/0009-2509(92)80005-W
  24. Moreau, E. and Touchard, G. G., 2008, "Enhancing the Mechanical Efficiency of Electric Wind in Corona Discharges," J. Electrostat. Vol. 66, pp.39-44. https://doi.org/10.1016/j.elstat.2007.08.006
  25. Yamada, K., 2004, "An Empirical Formula for Negative Corona Discahrge Current in Point-Grid Electrode Geometry," J. appl. phys. Vol. 96, pp.2472-2475. https://doi.org/10.1063/1.1775301
  26. Chang, J. S., 2001, "Recent Development of Plasma Pollution Control Technology : a Critical Review," Sci. Technol. Adv. Mat. Vol. 2, pp.571-576. https://doi.org/10.1016/S1468-6996(01)00139-5
  27. Chang, J. S., 2003, "Next Generation Integrated Electrostatic Gas Cleaning Systems," J. Electrostat. Vol. 57, pp.273-291. https://doi.org/10.1016/S0304-3886(02)00167-5
  28. McAdams, R., 2001, "Prospects for Non-Thermal Atmospheric Plasmas for Pollution Abatement," J. Phys. D: Appl. Phys. Vol. 34, pp.2810-2821. https://doi.org/10.1088/0022-3727/34/18/315
  29. Mizuno, A., 2007, "Industrial Application of Atmospheric Non-Thermal Plasma in Environmental Remediation," Plasma Phys. Control. Fusion. Vol. 49, pp.A1-A15. https://doi.org/10.1088/0741-3335/49/5A/S01
  30. Shiavon, M., Torretta, V., Casazza, A. and Ragazzi, M., 2017, "Non-Thermal Plasma as an Innovative Option for the Abatement of Volatile Organic Compounds : a Review," Water. Air. Soil. Poll. Vol. ), pp.228-388.
  31. Tham, K. W., 2016, "Indoor Air Quality and Its Effects on Humans - A Review of Challenges and Developments in the last 30 Years," Energ. Buildings. Vol. 130, pp.637-650. https://doi.org/10.1016/j.enbuild.2016.08.071