DOI QR코드

DOI QR Code

A Study on Development of High Efficiency Toilets with VOF Numerical Analysis

VOF 수치해석을 통한 고절수형 위생도기 개발에 관한 연구

  • 안일용 (공주대학교 대학원 기계공학과) ;
  • 이영림 (공주대학교 기계자동차공학부) ;
  • 조우석 (한국세라믹기술원 도자세라믹센터) ;
  • 김진호 (한국세라믹기술원 도자세라믹센터)
  • Received : 2012.10.30
  • Accepted : 2012.12.11
  • Published : 2012.12.15

Abstract

When water shortage has been getting worse recently, toilet water-saving is one of the most effective way to solve the water shortage. Therefore, in this study, toilet flushing performance was investigated with VOF(Volume Of Fluid) model to obtain the basic design data for the development of high-efficiency toilets. The result showed that the shorter trapway, the longer the flushing duration time. However, the shorter trapway is found to have disadvantage in exhausting dirt due to relatively weak siphon and higher curvature. Since the remaining water in a trapway appears to help siphon, it is also an important factor in developing high-efficiency toilets. Although higher water level in the water tank shows better performance in flushing, lower water level is preferred to save water. Too low water level may cause dirt to clog the trapway due to relatively weak siphon.

Keywords

Acknowledgement

Supported by : 한국세라믹기술원

References

  1. Marq, D. V., 2001, Water: The Fate of Our Most Precious Resource, Mariner Books, Canada.
  2. Kim, J. B., 2007, "Domestic Water Demand Model," Korea Water Resources Corporation, Vol. 41, pp. 31-37.
  3. Suh, K. W., Won, Y. J., and Lee, Y. H., 2009, "A Study on the Water Saving Device Using a Variable Position Straight Trap in Water Closet System," The Society of Air-conditioning and Refrigerating Engineers of Korea, Vol. 41, pp. 465-470.
  4. Park. S. J., and Lee. Y. L., 2011, "Optimal Flow Design of High-efficiency, Cold-flow, and Large-size Heat Pump Dryer," Journal of the Korean Society of Manufacturing Technology Engineers, Vol. 20, No. 5, pp. 547-552.
  5. Hwang. I. S., and Lee. Y. L., 2012, "A Study of Adiabatic Performance for Vacuum Glazing with Design Conditions," Journal of the Korean Society of Manufacturing Technology Engineers, Vol. 21, No. 4, pp. 582-587. https://doi.org/10.7735/ksmte.2012.21.4.582
  6. Wang, Y. H., Xiu, G. J., and Tan, H. S., 2011, "CAD and CAE Analysis for Sipohn Jet Toilet," Physics Procedia, Vol. 19, pp. 472-476. https://doi.org/10.1016/j.phpro.2011.06.194
  7. Zhao, S. Y., Liu, Z. J., and Peng, Z. W., 2008, "Optimized Design of Toilet Siphon Pipeline Based on Fluent and Its Validated Test," Journal of System Simulation, Vol. 20, No. 16, pp. 4412-4416.
  8. Hu, J. G., Sun, Y. S., and Liu, M. J., 2008, "Numerical Simulation of Two-phase Flow in Wash-down Toilet Flush Process," Journal of System Simulation, Vol. 20, No. 6, pp. 1599-1602.
  9. Shih, T. H., Liou, W. W., Shabbir, A., and Zhu, J. A., 1995, "A New k-$\varepsilon$ Eddy-Viscosity Model for High Reynolds Number Turbulent FLows Model Developement and Validation," Computer Fluids, Vol. 24, No. 3, pp. 27-238. https://doi.org/10.1016/0045-7930(94)E0013-N
  10. ANSYS, 2012, ANSYS FLUENT User's Manual Version 14.0, ANSYS Inc.
  11. Hirt, C. W., and Nichols, B. D., 1981, "Volume of Fluid (VOF) Method for the Dynamics of Free Boundaries," J. Computational Physics, Vol. 39, Issue 1, pp. 201-225. https://doi.org/10.1016/0021-9991(81)90145-5
  12. Shin, S. H., and Lee, W. I., 1997, "Finite Element Analysis of Flow with Moving Free Surface by Volume of Fluid Method," Transactions of the KSME B, Vol. 21, No. 9, pp. 1230-1243.

Cited by

  1. A study on performance optimization of a toilet by measuring accumulated flow rate of a trapway vol.28, pp.4, 2014, https://doi.org/10.1007/s12206-013-1163-y
  2. A study of the characteristics of a super water-saving toilet with flexible trapway by measuring accumulated flow rate vol.28, pp.8, 2014, https://doi.org/10.1007/s12206-014-0714-1
  3. Development of water saving toilet-flushing mechanisms vol.8, pp.2, 2018, https://doi.org/10.1007/s13201-018-0696-8
  4. CFD를 이용한 티타늄 박판 레이저 용접 퍼징장치의 성능예측에 관한 연구 vol.27, pp.1, 2018, https://doi.org/10.7735/ksmte.2018.27.1.70