Effect of Fans’ Placement on the Indoor Thermal Environment of Typical Tunnel-Ventilated Multi-Floor Pig Buildings Using Numerical Simulation

Agriculture

Mengbing Cao¹  Xiaoshuai Wang¹  Kaiying Wang¹  Feiyue Hu¹  Qianying Yi²  Thomas Amon²  Guoqiang Zhang³  David Janke⁴  Tian Xie⁵ 

[1] College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China;Department of Engineering for Livestock Management, Leibniz Institute for Agricultural Engineering and Bioeconomy (ATB), Max-Eyth-Allee 100, 14469 Potsdam, Germany;Department of Engineering, Aarhus University, Inge Lehmanns Gade 10, 8000 Aarhus, Denmark;Department of Veterinary Medicine, Institute of Animal Hygiene and Environmental Health, Free University Berlin, Robert-von-Ostertag-Str. 7–13, 14163 Berlin, Germany;Qingdao Big Herdsman Machinery Co., Ltd., Qingdao 266000, China;

关键词: airflow pattern;    effective temperature;    numerical evaluation;    ventilation rate;    shaft’s width;   

DOI  :  10.3390/agriculture12060891

来源: DOAJ

【 摘 要 】

An increasing number of large pig farms are being built in multi-floor pig buildings (MFPBs) in China. Currently, the ventilation system of MFPB varies greatly and lacks common standards. This work aims to compare the ventilation performance of three popular MFPB types with different placement of fans using the Computational Fluid Dynamics (CFD) technique. After being validated with field-measured data, the CFD models were extended to simulate the air velocity, air temperature, humidity, and effective temperature of the three MFPBs. The simulation results showed that the ventilation rate of the building with outflowing openings in the endwall and fans installed on the top of the shaft was approximately 25% less than the two buildings with fans installed on each floor. The ventilation rate of each floor increased from the first to the top floor for both buildings with a shaft, while no significant difference was observed in the building without a shaft. Increasing the shaft’s width could mitigate the variation in the ventilation rate of each floor. The effective temperature distribution at the animal level was consistent with the air velocity distribution. Therefore, in terms of the indoor environmental condition, the fans were recommended to be installed separately on each floor.

【 授权许可】

Unknown