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.


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

Citation:  Proceedings of the Seventh International Symposium, 18-20 May 2005 (Beijing, China) Publication Date 18 May 2005  701P0205.(doi:10.13031/2013.18342)
Authors:   X. WANG Y. ZHANG
Keywords:   thermal environment, indoor air quality, ventilation effectiveness

Ventilation and ventilation system have a direct effect on the thermal environment and contaminant distribution in an animal building. The objectives of this research are to investigate the thermal environment and the contaminant transport in a mechanically ventilated swine building and to study the correlation of contaminant transport and airflow in the building. Two important thermal environment parameters, temperature and velocity, and the dust mass concentration were measured at multiple points in a typical pig building.

The measured velocity distribution showed relatively lower velocity in animal zone (< 0.5 m/s). There was a local stale zone located under inlet air jet, which had less air exchange with surrounding zones. The temperature distribution was more uniform than air velocity with a cold draft in the inlet side. This study showed that the improper location of thermostat could cause the exhaust fans to stay on even if the temperature in most of the room was below the set point temperature.

The measurement of dust mass concentrations within the building revealed high spatial variation. The dust spatial distribution was similar to the airflow pattern and showed a very close correlation between the dust concentration and the airflow pattern. It appears that the ventilation system has a direct effect on the dust spatial distribution. These results are useful to design a better ventilation system to keep the animals comfortable and performing well by providing optimal thermal environment and improving the ventilation effectiveness.

(Download PDF)    (Export to EndNotes)