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

Xiaoshuai Wang, Mengbing Cao, Feiyue Hu, Qianying Yi, Thomas Amon, David Janke, Tian Xie, Guoqiang Zhang and Kaiying Wang
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Xiaoshuai Wang: College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
Mengbing Cao: College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
Feiyue Hu: College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
Qianying Yi: Department of Engineering for Livestock Management, Leibniz Institute for Agricultural Engineering and Bioeconomy (ATB), Max-Eyth-Allee 100, 14469 Potsdam, Germany
Thomas Amon: Department of Engineering for Livestock Management, Leibniz Institute for Agricultural Engineering and Bioeconomy (ATB), Max-Eyth-Allee 100, 14469 Potsdam, Germany
David Janke: Department of Veterinary Medicine, Institute of Animal Hygiene and Environmental Health, Free University Berlin, Robert-von-Ostertag-Str. 7–13, 14163 Berlin, Germany
Tian Xie: Qingdao Big Herdsman Machinery Co., Ltd., Qingdao 266000, China
Guoqiang Zhang: Department of Engineering, Aarhus University, Inge Lehmanns Gade 10, 8000 Aarhus, Denmark
Kaiying Wang: College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China

Agriculture, 2022, vol. 12, issue 6, 1-15

Abstract: 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.

Keywords: airflow pattern; effective temperature; numerical evaluation; ventilation rate; shaft’s width (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2022
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