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首页> 外文会议>Animal environment and welfare >Re-Design of Ventilation System of a Newly-Converted Grouped Sow Housing Facility Using Computer Simulation
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Re-Design of Ventilation System of a Newly-Converted Grouped Sow Housing Facility Using Computer Simulation

机译：使用计算机模拟对新转换成组母猪房设施的通风系统进行重新设计

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In response to increasing public demand for improved animal welfare in pig production, the industry is currently shifting from housing pregnant sows in traditional stalls to the more welfare-friendly group housing system.In addition, in the recently-revised Canadian code of practice, more floor space is allocated per sow than the current allocation in traditional stall systems, thus converting a sow barn facility to group housing system means reduced total number of animals can be housed in the same building footprint.This conversion leads to considerable changes in the environmental conditions of the room and thus requires reconsideration of the existing ventilation system.This study aimed to re-design and evaluate the mechanical ventilation system of a newly-converted group sow housing facility using computer simulation techniques.A computer simulation package which utilizes computational fluid dynamics (CFD) principles to numerically simulate fluid flow, heat and mass transfer, and mechanical movement, was employed.Various ventilation design configurations which included different sizes and locations of exhaust fans, and design and location of air inlets, were assessed based on thermal ventilation effectiveness.Results showed that the pre-conversion room with stall system and the converted group housing room with unmodified ventilation design were not very effective in removing heat from the animal occupied zone.Among all the design configurations investigated, tunnel ventilation system with the exhaust fans on one side and inlets on the opposite side had the highest heat removal effectiveness for both summer and winter conditions, thus this configuration was selected for actual in-barn evaluation.
机译：为了满足公众对提高生猪生产中动物福利的需求，养猪业目前正从传统的小猪舍中转移怀孕母猪，转向更有利于福利的团体饲养体系。此外，在加拿大最近修订的《行为守则》中每头母猪的地面空间分配要比传统畜栏系统中的当前分配空间更大，因此将母猪舍设施转换为成群饲养系统意味着可以在同一建筑物占地面积内减少动物总数，这种转换导致环境条件发生了很大变化这项研究旨在利用计算机仿真技术重新设计和评估新改造的母猪群舍设施的机械通风系统。 CFD）原理来数值模拟流体流动，传热和传质，以及根据热通风效果评估了各种通风设计配置，包括排气扇的尺寸和位置以及进气口的设计和位置，结果表明，带有失速系统的转换前房间和转换后的房间在未经调查的所有设计配置中，采用排风扇在一侧而另一侧是进气口的隧道通风系统在不改变动物居住区的热量方面效果不佳。在夏季和冬季条件下均如此，因此选择此配置进行实际的谷仓内评估。

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