Evaluate the Effect of Pad Cooling System in Laying Hens Barn in Southeast China using CFD Simulation
Microenvironment around hens is critical to them during hot and humid summer,when temperature is over 35℃ and relative humidity is higher than 80%.Most of the year,a microenvironment within the thermoneutral zone is provided hy using mechanical ventilation and evaporative cooling systems.However heterogeneity of temperature within animal barn can be critical during hot and humid periods,particularly in high rise barns for laying hens.Therefore it is still necessary to evaluate the efficiency of current ventilation and cooling system.It is the basic of the following design improvement of ventilation and cooling for these houses.Computational Fluid Dynamics (CFD).associated with limited field measurements.can overcome the weakness of uncontrollable weather conditions and limited number of sampling points.The objective of this study was to evaluate the ventilation of a typical laying hen house with evaporating cooling systems with respect to temperature in hot and humid regions.First.a fielcl experiment was conducted in a typical laying hen harn (15000 hen high rise)located in the southeast of China.It included 16 positions of airflow velocity,temperature and relative humidity inside and one position outside the barn.The results of CFD simulation for the velocity and temperature were in agreement with observed data.According to the simulation result,the condition inside barn could not match the requirement of hens in a hot humid condition.The distribution of both temperature and air velocity were not uniform enough for laying hen living and production,especially in the middle part and the fans side part,the environment was much worse than the beginning of ventilation.
Wang Xiaoshuai Wang Kaiying
College of Biosystems Engineering and Food Science,Zhejiang University,China
国际会议
XVIth International Congress on Animal Hygiene(第十六届动物卫生国际会议(ISAH 2013))
南京
英文
201-207
2013-05-05（万方平台首次上网日期，不代表论文的发表时间）