3D CFD Analysis of Natural Ventilation in Reduced Scale Model of Compost Bedded Pack Barn for Dairy Cows

Applied Sciences

卷:10

Keller S. O. Rocha¹  Carlos E. A. Oliveira¹  FlávioA. Damasceno²  GeorgeB. Day³  JosephL. Taraba³  Matteo Barbari⁴  RandiA. Black⁵  Felipe A. O. Vega⁶  JeffreyM. Bewley⁷ 

[1] Departamento de Engenharia Agrícola, Universidade Federal de Viçosa, Viçosa 36570-900, Brasil;

[2] Departamento de Engenharia, Universidade Federal de Lavras, Lavras 37200-900, Brasil;

[3] Department of Agricultural Engineering, University of Kentucky, Lexington, KY 40502, USA;

[4] Department of Agriculture, Food, Environment and Forestry, University of Florence, 50145 Florence, Italy;

[5] Department of Animal Science, University of Tennessee, Knoxville, TN 37996, USA;

[6] Facultad de Ciencias Agrarias, Nacional de Colombia, Medellín 050034, Colombia;

[7] Holstein Association USA, Brattleboro, VT 05302, USA;

关键词: computational fluid dynamic;    natural ventilation;    roof design;    compost bedded pack barns;    dairy cattle;   

DOI  :  10.3390/app10228112

来源: DOAJ

【 摘 要 】

Compost bedded pack (CBP) barns have been receiving increased attention as an alternative housing system for dairy cattle. To create a satisfactory environment within CBP barns that promotes a good composting process, an adequate air movement and minimal temperature fluctuations throughout the building are required. Therefore, a study based on compost barn structure model employing techniques of dimensional analysis for naturally ventilated buildings was developed. Three-dimensional computational fluid dynamic (CFD) simulations of compost barns with different ridge designs and wind direction, along with the visual demonstration of the impact on airflow through structure were performed. The results showed that the barn ventilation CFD model and simulations were in good agreement with the experimental measurements, predicting the airflow through the CBP barns structure for alternative roof ridge types adequately. The results also indicate that the best roof configuration in the winter was the open ridge with chimney for a west to east wind direction.

【 授权许可】

Unknown