基于CFD模拟的禽舍内气流组织方式优化

Optimization of airflow organization patternin the poultry housebased on CFD simulation

在全球变暖的气候变化中,蛋鸡的热应激爆发使鸡蛋的生产率降低,传统通风方式即上送侧回通风方式所提供的环境已无法满足需要.大规模的鸡舍需要新型通风方式,以提供安全和均匀的室内环境,舒适的环境会给蛋鸡的采食和产蛋带来巨大收益.本文采用了一种新型通风方式即置换通风方式,该方式可使新鲜的空气经位于笼子底部的进风口进入到蛋鸡舍内,并经设在屋顶上的排风口排出房屋.利用计算流体力学(CFD)模型,模拟比较了鸡舍置换通风方式和传统通风方式下夏季的空气交换效率和热环境.结果表明,与传统通风方式相比,置换通风方式能提供更均匀、更舒适的鸡舍热环境.

The outbreak of heat stress reduces the productivity of eggs,especially in the global warming climate change,large-scale chicken houses need new ventilation system to provide a safe and even indoor environment,and comfortable environment will have a huge impact on the chicken's feeding and egg production.The research developeda new ventilation system,displacement ventilation system,which allows fresh air to enter the egg house through the vent located at the bottom of the cage,and finally leave the house through the fan installed on the roof.In terms of the air exchange efficiency and thermal environment in summer,the displacement ventilation system is compared with the traditional chicken house ventilation system,i.e.the return air system at the upper supply side,by using the verified computational fluid dynamics(CFD)model.The results show that the displacement ventilation system provides a more uniform thermal environment than the traditional ventilation system.