冬季猪舍热回收换气系统供暖的数值模拟

Numerical simulation of heat supply for heat recovery ventilation system of piggery in winter

为了研究冬季热回收换气系统的送风角度对猪舍供暖效果的影响,该文采用计算流体力学对空载猪舍的温度场和气流场进行数值模拟,并采取试验对模型进行验证。试验结果表明,模拟值与测定值拟合度较高,该模型较合理。在满足仔猪通风量情况下,基于建立的数学模型对热回收换气系统3种不同送风角度(30°、45°和60°)的温度场和气流场进行模拟。结果表明:与30°和60°送风角度比较,送风角度为45°时的舍内温度分布均匀,舍内气体交换较充分,满足猪的生长要求。该文为热回收换气系统在实际养猪生产中的应用提供依据。

To study the effect of different air inlet angels of heat recovery ventilation system on the heating of the swine pens, the air temperature field and airflow field in the empty swine pens were numerically simulated based on computational fluid dynamics and theoretical model was validated with experiments. The experimental results showed that simulated and experimental results had the higher fitting degree and the theoretical model was reasonable. And when the ventilation rate of swine pens was met the requirement of, air temperature field and airflow field were numerically simulated with different air inlet angel （30°、45° and 60°） of the heat recovery ventilation system based on above model. The results showed that compared with both 30° and 60°air inlet angel, the air temperature was more even and fresh air was mixed more sufficiently inside the swine pens with the 45°air inlet angel, which met the growth requirement of pigs. It can provide a reference for application of heat recovery ventilation system in pig production.