在开放的堆肥床式包棚系统中,空气速度的空间变化具有正压通风系统
Carlos Eduardo A Oliveira1, Ilda DE Fátima F Tinôco1, Flávio A Damasceno2
1Universidade Federal de Viçosa, Departamento de Engenharia Agrícola, Av. Peter Henry Rolfs, s/n, Campus Universitário, 36570-900 Viçosa, MG, Brazil.
Anais da Academia Brasileira de Ciencias
|July 19, 2023
概括
在堆肥床包棚 (CBP) 中的通风对于乳牛的舒适性至关重要. 这项研究发现,在大多数谷仓区域,空气速度往往低于推水平,这表明通风效率差.
科学领域:
- 农业工程 农业工程
- 动物科学动物科学
- 环境科学 环境科学
背景情况:
- 堆肥床包棚 (CBP) 系统依赖于足够的空气速度,以确保奶牛的热舒适度和床材质量.
- 评估通风效率对于优化CBP住房中的环境条件至关重要.
- 之前的研究强调了空中移动和动物福利在封闭式畜牧业操作之间的联系.
研究的目的:
- 评估和描述空气速度在1.5米高度 (vair,M) 和床位水平 (vair,B) 的依赖性和空间分布.
- 在具有正压通风的开放CBP系统中评估通风效率.
- 为乳牛确定设施内的空气速度低于最佳的区域.
主要方法:
- 冬季在巴西的CBP设施进行,在谷仓的55个点收集空气速度数据.
- 在三个星期的早晨和下午期间,在两个高度 (1.5米和床位水平) 测量了空气速度.
- 利用地缘统计技术分析空间依赖和空气速度数据的分布.
主要成果:
- 强烈的空间依赖和空气速度的不均分布在两个测量高度被观察到.
- 超过65%的设施区域的空气速度 (vair,M和 vair,B) 低于推的1.8 m·s-1.
- 充足的通风仅限于该设施的最初20.0米,受风机线位置的影响.
结论:
- 研究的CBP设施中的正压通风系统显示,空气速度在大多数仓库中分布不充分.
- 低于最佳的空气速度水平对乳牛的热舒适性和床铺管理构成风险.
- 需要进一步调查和对通风策略的潜在调整,以改善CBP系统中的空气循环.
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