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An Innovative Ventilation Monitoring System at a Pig Experimental Building

机译:猪实验楼的创新通风监控系统

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Ventilation rate is one of the key variables to quantify aerial emissions from animal feeding operations but is technically challenging to measure.This research aimed at developing a new system to reliably and continuously monitor ventilation rate at a state-of-the-science pig environmental building, which consists of 12 rooms of 11.0 × 6.1 × 2.7 m (L × W × H) each and with a 1.8-m deep manure pit under slatted floor.Each room has a capacity of 60 finishing pigs and is equipped with four ventilation fans.The two pit fans are variable-speed 25-cm diameter tube-mounting fans.The two wall-fans, one of 36-cm diameter and another of 51-cm diameter,are single-speed fans at the room end wall.A Pit Exhaust Airflow Measurement Assembly(PEAMA) using an impeller anemometer to measure ventilation rate was developed and installed in each pit fan.The PEAMA was calibrated in a laboratory.Twenty-four PEAMAs provide continuous and real-time ventilation outputs in m3 min-1 to an on-site computer system(OSCS) in the building.Wall fan operations are monitored using unregulated AC to DC power supply adapters, which provide fan on-off signals as well as fan power voltages to the OSCS.Room static pressures are measured with pressure transducers.A Wall Fan Tester was developed to test the wall fans and obtain fan airflow-pressure models.Wall fan ventilation rates are indirectly obtained during post-measurement data processing using the monitoring data and fan models.The performance results demonstrated that this innovative system improves reliability and accuracies of aerial emission monitoring.
机译:通风率是量化动物饲养操作产生的空气排放的关键变量之一,但在技术上难以测量。这项研究旨在开发一种新系统,以可靠,连续地监测最先进的猪舍环境中的通风率包括12个房间,每个房间11.0×6.1×2.7 m(L×W×H),在板条地板下有一个1.8 m深的粪坑,每个房间可容纳60头育肥猪,并配备了四个通风风扇。两个井喷风扇是直径为25厘米的变速管安装风扇。两个壁挂风扇是房间端壁处的单速风扇,一个直径为36厘米,另一个直径为51厘米。开发并安装了使用叶轮风速计测量通风速率的坑式排气流量测量组件(PEAMA),并在实验室中对PEAMA进行了校准。二十四个PEAMA提供了m3 min-1的连续实时通风输出到现场计算机系统( OSCS),使用未调节的AC至DC电源适配器监控墙风扇的运行情况,该适配器可向OSCS提供风扇的开关信号以及风扇电源电压,并通过压力传感器测量房间的静压。开发用于测试壁挂风扇并获得风扇气流压力模型。在后测量数据处理过程中使用监视数据和风扇模型间接获得壁式风扇通风率的性能结果表明,该创新系统提高了天线的可靠性和准确性排放监测。

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