关键词: 鸭舍, 发酵床网养, 计算流体力学, 环境优化

Abstract: In response to the problem of largescale duck farming in winter, temperature, relative humidity, and wind speed tests were conducted on the fermentation bed net duck breeding house. A CFD model of the duck house was constructed, and environmental simulations of temperature, humidity, and airflow fields were carried out. Optimization plans for the structure and equipment of the duck house were proposed. The results showed that during the testing period, the temperature inside the room was 9.80℃-17.68℃, and the average temperature difference between inside and outside the room was 8.29℃. The average relative humidity inside the house was 81.90%, slightly lower than outside. The wind speed inside the building was 0.04-0.57m/s. The temperature, humidity, and airflow fields of the original model were simulated and compared with the measured results, with an average relative error of 296% to 7.67%. Further, the opening angle of the ventilation was increased from 45° to 50°, and two warm air fans were added to the initial end and center of the fermentation bed located on the wet curtain side to optimize the environment of the original duck house. Simulation showed that the temperature inside the optimized model was increased from 1532℃ to 16.85℃, reaching the optimal temperature for the growth of egg ducks during the breeding period. The average humidity inside the house was decreased to 66.52%, a decrease of 11.07% compared to the original, which was lower than the threshold of high humidity environment. The average wind speed inside the building was increased from 0.29m/s to 0.38m/s, improving the ability to remove harmful gases. This study can provide a theoretical basis for improving the environmental quality of similar duck houses.

Key words: duck coop, fermentation bed net, CFD, environmental optimization