Real-Time Airflow Rate Measurements from Mechanically Ventilated Animal Buildings
| Autor: | Steven J. Hoff, Ji-Qin Ni, Brian C. Zelle, Albert J. Heber, Minda A. Nelson, Dwaine S. Bundy, Larry D. Jacobson, Yuanhui Zhang, Jacek A. Koziel, David B. Beasley |
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| Rok vydání: | 2009 |
| Předmět: |
Air Movements
Air Pollutants Measurement method Meteorology Atmospheric pressure Swine Airflow Airspeed Static pressure Management Monitoring Policy and Law Housing Animal Ventilation law.invention law Air Pollution Range (aeronautics) Odorants Ventilation (architecture) Animals Environmental science Relative humidity Chickens Waste Management and Disposal |
| Zdroj: | Journal of the Air & Waste Management Association. 59:683-694 |
| ISSN: | 2162-2906 1096-2247 |
| DOI: | 10.3155/1047-3289.59.6.683 |
| Popis: | This paper describes techniques used to determine airflow rate in multiple emission point applications typical of animal housing. An accurate measurement of building airflow rate is critical to accurate emission rate estimates. Animal housing facilities rely almost exclusively on ventilation to control inside climate at desired conditions. This strategy results in building airflow rates that range from about three fresh-air changes per hour in cold weather to more than 100 fresh-air changes per hour in hot weather. Airflow rate measurement techniques used in a comprehensive six-state study could be classified in three general categories: fan indication methods, fan rotational methods, and airspeed measurement methods. Each technique is discussed and implementation plans are noted. A detailed error analysis is included that estimated the uncertainty in airflow rate between +/-5 and +/-6.1% of reading at a building operating static pressure, air temperature, relative humidity, and barometric pressure of 20 Pa, 25 degrees C, 50%, and 97,700 Pa, respectively. |
| Databáze: | OpenAIRE |
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