摘要
为对保育舍内环境质量状况进行评估和改善舍内环境提供有益参考,应用CFD对采用负压通风和水泡粪保育猪舍的气流场、温度场、湿度场和颗粒物浓度场进行三维稳态模拟。由模拟结果可知:在冬季送入气流,舍内动物所在区域高度为0.2 m的风速基本保持在0~0.2 m/s,大部分区域风速在0.1 m/s以下,相对湿度则基本在60%~70%之间,舍内的平均温度保持在26~34℃,大部分区域的PM_(2.5)、PM_(10)和TSP质量浓度分别在0~0.1 mg/m^3、0~0.7 mg/m^3和0~1.0 mg/m^3之间。由《规模猪场环境参数及环境管理》可知,舍内环境质量基本满足保育猪对冬季环境需求,但在单元入口及墙角处仍有优化空间。
The quality of the environment could directly affect the production performance of pigs. Especially for weaned pigs, they have just undergone weaned stress and are very sensitive to external environment change. In order to evaluate the environmental conditions in the weaned pigs building in typical East China, and provide useful suggestions for pig barn structure design and the environment improvement, based on computational fluid dynamics （CFD） method, a three-dimensional steady state simulation was conducted on air speed, temperature, relative humidity and particle concentration distribution of a weaned pig building with negative pressure ventilation system and manure pit system. It was known from the CFD results that CFD could be a useful tool in analyzing the indoor environment in livestock house. When air was input to the pig house during winter days, the wind speeds in the region where pig was fed at z = 0. 2 m could maintain within 0 - 0. 2 m/s, and most of them were below 0. 1 m/s. Also, the relative humidity remained at about 60% -70%. Its temperature was maintained within 26 ~ 34℃. In addition, the PM2.5, PM10 and TSP concentrations were kept in 0 -0. 1 mg/m3, 0 ~0. 7 mg/m3 and 0 - 1.0 mg/m3, respectively, in most area of pig house, which could meet the requirements of weaned pigs in winter according to environmental parameters and environmental management for intensive pig farms. Yet, at entrance of the units and some corners, there was still potential for optimization.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2017年第9期270-278,共9页
Transactions of the Chinese Society for Agricultural Machinery
基金
国家自然科学基金项目(31672467)
浙江省环保科技计划项目(2012A007)
关键词
保育舍
湿热环境
颗粒物
CFD
模拟
weaned pig
hygrothermal environment
particle matter
CFD
simulation
