Click on “Download PDF” for the PDF version or on the title for the HTML version.


If you are not an ASABE member or if your employer has not arranged for access to the full-text, Click here for options.

Air Velocity Distribution in a Commercial Broiler House

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  2012 IX International Livestock Environment Symposium (ILES IX)  ILES12-1339.(doi:10.13031/2013.41562)
Authors:   Brian D Luck, Jeremiah D Davis, Joseph L Purswell, Jonathan W. W Olsen
Keywords:   Anemometer, ventilation, broiler, tunnel ventilation

Increasing air velocity during tunnel ventilation in commercial broiler production facilities improves production efficiency, and many housing design specifications require a minimum air velocity. Air velocities are typically assessed with a hand-held velocity meter at random locations, rather than systematic traverses. Simultaneous measurement of air velocity at multiple locations in the facility would provide a more accurate estimation of mean velocity. Objectives of this study were to develop a multi-point air velocity measurement system and map air velocity in a tunnel ventilated broiler house. An array of hot-bead type anemometers was placed in a commercial broiler production facility measuring 12.9 x 121.9 m with curtain side walls; the house was equipped with ten 121.9 cm exhaust fans. Cross-sectional velocity measurements were taken in increments of 12.19 m starting at 12.19 m from the end wall of the house and ending at 12.19 m away from the exhaust fans; one cross section of the house was tested at a time. The sensors were allowed a 2 min settling time before 5 min of data collection at each location. Air velocities were compiled at 45.7, 106.7, 167.6 and 213.4 cm above the litter. Mean velocities ranged from 1.94 m/s to 3.06 m/s (382 ft/min to 602 ft/min) across all cross-sections measured. All location contributions to the ANOVA were significant (P = 0.0185) and regression results showed a quadratic relationship between transverse location and air velocity.

(Download PDF)    (Export to EndNotes)