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Evaluation of A Head-Space Zone Ventilation and Drip Cooling System to Alleviate Heat Stress in Swine Farrowing House

文献类型： 会议论文

第一作者： Hongmin Dong

作者： Hongmin Dong 1 ; Xiuping Tao; Yue Li; Lin Jintian;

作者机构： 1.Agrometeorology Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China

关键词： ventilation;cooling;environmental control

会议名称： 1998 ASAE annual international meeting technical papers.vol.I

主办单位：

页码： 984073/1-984073/11

摘要： This study investigated the characteristics and performance of a positive pressure head-space ventilation with drip cooling system in a swine farrowing facility in southern China. Equations were established that estimate ventilation rates of head-space ventilation system for different air velocity requirements at the sow level. The system was designed, installed, and operated in an commercial farrowing house with 42 sows. The ventilation duct and drip emitters were installed about 1.2 m above the feeding height and 0.3 m behind the front hcadgate of the stall. The field experiment showed that when sows were exposed to an inside air temperature of 32.5 deg C, the body temperaturc reached 39.9-40.2 deg C. Head-space ventilation systems produced 0.6-0.8mls. mean air velocity in the area around the area of sows. The average body temperature with head-space ventilation with drip cooling were about 0.5 deg C lower than the body temperature without zone cooling ventilation system.

分类号： S2

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