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Comparison of airflow homogeneity in Compost Dairy Barns with different ventilation systems using the CFD model

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dc.contributor.authorFagundes, B.
dc.contributor.authorDamasceno, F.A.
dc.contributor.authorAndrade, R.R.
dc.contributor.authorSaraz, J.A.O.
dc.contributor.authorBarbari, M.
dc.contributor.authorVega, F.A.O.
dc.contributor.authorNascimento, J.A.C.
dc.date.accessioned2020-05-12T14:02:39Z
dc.date.available2020-05-12T14:02:39Z
dc.date.issued2020
dc.description.abstractIn the pursuit of high milk productivity, producers are using confinement systems in order to improve performance and animal welfare. Among the housing systems, the Compost bedded-pack barns (CBP) stand out. In these barns a bedding area is provided inside, where cows move freely. Generally this area is covered with carbon source material (such as sawdust or fine dry wood shavings) which together with manure, thanks a regular mechanically stirring, ensures the aerobic composting process. The ventilation in these facilities has the function of dehumidifying the air, improving the air quality, drying the bedding, improving the thermal comfort conditions of the confined animals. This work aimed at validating a computational model using Computational Fluid Dynamics (CFD) to determine the best homogeneity of airflows generated by different forced ventilation systems used in CBP barns. Two CBP barns were compared with different ventilation systems: high volume low speed (HVLS) and low volume high-speed (LVHS) fans. The results showed that the proposed model was satisfactory to predict the flows generated by both types of fans. It was concluded that the use of HVLS fans produced a more homogeneous airflow when compared to LVHS fans. The use of mechanical ventilation in tropical conditions is necessary for the proper functioning of the system. In this study, the systems used promoted the increase in air speed to levels close to adequate.eng
dc.identifier.issn1406-894X
dc.identifier.publicationAgronomy Research, 2020, vol. 18, Special Issue 1, pp. 788–796eng
dc.identifier.urihttp://hdl.handle.net/10492/5704
dc.identifier.urihttps://doi.org/10.15159/ar.20.106
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) ; openAcces
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectairfloweng
dc.subjectanimal housingeng
dc.subjectcompost-bedded pack barneng
dc.subjectdairy cowseng
dc.subjectsimulationeng
dc.subjectarticleseng
dc.titleComparison of airflow homogeneity in Compost Dairy Barns with different ventilation systems using the CFD modeleng
dc.typeArticleeng

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2020, Vol. 18, Special Issue 1