DOI QR코드

DOI QR Code

Analysis of Airflow Characteristics in an Enclosed Nursery Pig House

무창자돈사의 공기유동 특성 분석

  • Song, Jun-Ik (National Livestock Research Institute, R.D.A.) ;
  • Choi, H.L. (School of Agricultural Biotechnology Engineering, Seoul National University) ;
  • Yang, C.B. (National Livestock Research Institute, R.D.A.) ;
  • Kim, H.T. (School of Agricultural Biotechnology Engineering, Seoul National University)
  • Published : 2005.02.28

Abstract

Experiments were carried out to evaluate the air speed distribution of an enclosed nursery pig bay in summer and winter. The data taken by experiments were compared to validate with the calculated air speeds by a commercial CFD code, FLUENT. Air basically enters into the bay through perforated circular ducts overhanged on the ceiling, leaves through a exhaust fan attached on the end-wall of the bay. Air speeds were measured as 2 ${\sim}$ 2.5 mls at the perforated holes in the duct in winter and 7 mls in summer. The validation showed that a CFD simulaton is one of feasible methods to predict airspeed distribution in the nursery pig bay.

Keywords

References

  1. Barber, E. M., Sokhansanj, S, Lampman, W. P. and Ogilvie, J. R. 1982. Stability of air flow patterns in ventilated spaces. ASAE Paper. No. 82-4581. St. Joseph, MI:ASAE
  2. Choi. H. L., Albright, L. D. and Timmons, M. B. 1987. Air velocity and contaminant distribution in a slot-ventilated enclosure. ASAE paper 87-4036. St. Joseph, MI:ASAE
  3. Choi. H. L., Albright, L. D., Timmons, M. B. and Warhaft, Z. 1988. An application of the k-epsilon turbulence model to pridict air application in a slot-ventilated enclosure. Transactions of the ASAE. 33(6):1804-1813
  4. Choi. H. L., Albright, L. D. and Timmons, M. B. 1990. An application of the k- e turbulence model to predict how a rectangular obstacle in a slot-ventilated enclosure effects air flow. Transactions of the ASAE. 33(1):274-281 https://doi.org/10.13031/2013.31327
  5. Hoff, S. J., Janni, K. A. and Jacobson, L. D. 1992. Three-dimensional buoyant turbulent flows in a sacled model, slot-ventilated livestock confinement facility. Transactions of ASAE. 35(2):671-686 https://doi.org/10.13031/2013.28649
  6. Janssen, J. and Krause, K. 1988. Numerical simulation of airflow ASHREA Conf. ; Building Systems : Room Air and Air Contaminant Distribution, ed. L. L. Christianson, 131-135. 58 Dec
  7. Jin, Y. and Ogilvie, J. R. 1992. Isothermal airflow characteristics in a ventilated room with a slot inlet opening. Transactions of ASAE. 98(1):296-306
  8. Leonard, J. J. and McQuitty, J. B. 1986. The use of archimedes number in the design of ventilation systerns for animal housing. Conf. on Agricultural Engineering. Adelaide. 24-28 August
  9. Maghirang, R. G. and Manbeck, H. B. 1993. Modem particle transport in slot-inlet ventilated airspaces. Transactions of the ASAE. 36(5):1449-1459 https://doi.org/10.13031/2013.28485
  10. Riskowski, G. L., Priest, J. B., Ford, S. E. and Christianson, L. L. 1993. Environment in animal regions. livestock Environment IV, Fourth International Symposium, University of Warwick, Coventry, England. 411-418
  11. Sandberg, M. 1989. Velocity characteristics in mechanically ventilated offices rooms. Room Vent '87, June. Stockholm, Sweden, Session 2A
  12. Timmons, M. B., Albright, L. D., Furry, R. B. and Torrance, K. E. 1980. Experimental and numerical study of air movement in slot-ventilated enclosures. Transactions of ASAE. 86(1):221-240
  13. Timmons, M. B. 1984. Internal air velocities as affected by the size and location of continuous diffuser slots. Transactions of ASAE. 27(5):1514-1517 https://doi.org/10.13031/2013.32996
  14. Wang, J. 1996. Airflow distributions at floor level in a slot-outlet and slot-inlet ventilation room. ASHARE. 96(2):555-562
  15. Zhang, J. S. 1991. A fundamental study of two dimensional room ventilation flows under isothermal and non-isothermal conditions, Ph.D. thesis, University of Illinois at Urbana- Champaign