Document Type

Thesis - Open Access

Award Date


Degree Name

Master of Science (MS)

Department / School

Agricultural Engineering


A potential method to attain an optimally controlled swine environment conductive to both the animal and laborer is a pit ventilation system. A pit ventilation system should exhaust noxious gasses and odors that evolve in the pits before natural or forced convection currents transfer the gasses and odors into the livestock environment. This is especially important when minimum airflow rates are employed during winter operation. Pit ventilation systems in swine confinement housing have not continually produced an optimum environment for both the animal and operator. Consequently, improvements in design and performance data on various systems are needed, if more reliable ventilation is going to be provided. Pit ventilation system performance may be evaluated by comparing air velocities and airflow patterns to develop the information for pertinent engineering design. Therefore, a model study employing dimensional analysis and the principles of similitude to study ventilation characteristics of two scale model pit ventilation systems was initiated with the following objectives: 1. Determine the influence of pit ventilation system geometry on swine building ventilation characteristics, and 2 Evaluate the effect of liquid manure pit storage level and percent slat opening on swine building ventilation characteristics.

Library of Congress Subject Headings

Swine -- Housing




Number of Pages



South Dakota State University