文献类型： 会议论文

第一作者： Long Chen

作者： Long Chen ¹ ; Eileen E Fabian(Wheeler) ² ;

作者机构： 1.Tianjin Academy of Agricultural Sciences,Tianjin 300384,China

2.Department of Agricultural and Biological Engineering,Pennsylvania State University,State College,PA 16802,USA

关键词： Floor-raised hen housing;computational fluid dynamics;full-scale simulation;indoor air conditions;animal welfare

会议名称： International Symposium on Animal Environment and Welfare

主办单位：

页码： 123-130

摘要： A shift to cage-free eggs is underway in North America.This contributes to the most significant evolution that poultry facilities have been facing in decades.This study aims to provide practical recommendations to refining ventilation system design in cage-free hen houses with the goal of assuring bird welfare through comfortable conditions and improving the capacity of containing contaminants,such as ammonia.Four three-dimensional CFD models were developed based on a full-scale floor-raised hen house,and three alternatives.In addition,2,365 birds were individually modeled with simplified shapes to represent one-eighth of a real commercial hen house.Performance of the standard ventilation configuration and alternative designs were analyzed and evaluated by comparing their simulation outputs at locations represented by crosssectional planes in the model.Critical environment parameters such as temperature,pressure,air speed,and ammonia concentration were captured and exported for further analyses.Additionally,both indoor and outdoor contours of those key factors were created for data visualization and evaluation.Five animal zones were also created to represent the Animal Occupation Zone(AOZ)for specialized data analysis.Considerable simulation results and subsequent analyses substantially demonstrated these alternative models had the comparable capacity to create satisfactory indoor conditions for the cage-free hen house.In addition,statistical analyses were conducted to confirm the significance of vital factors and verify significant differences for particular comparisons.

分类号： s8