Abstract
The proponent of this study built a 1/3 scale prototype model of a windowless swine breeding house that was constructed with slotted inlets and dampers on the side wall. Air was admitted through these inlets and discharged throgh duct oulets at the center of the ceiling.
This study was aimed at finding relationship between the velocity or direction of incoming air movement, and the influence of the “pen and sow” conditions upon air mnvement. Assuming summer ventilation requirements, tests were conducted by applying the similarity principle of Archimedes number. The results are the following:
1) The angle of incoming air varies from 60° to 70° for all tests.
2) The dimensionless velocity of air movement was less than 0.2 in more than 90% of the measured area, and it was noted that damper angle rather than inlet velocity provides an influence on air flow pattern.
3) The condition when the damper angle was 45° and the inlet velocity was 4.5m/s was more suitable for summer ventilation than other damper angle values.
