A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Evaluation of a freely rotating impeller to measure fan airflow rates in livestock buildings
This study was conducted to develop and evaluate a method to continuously measure fan airflow rates in livestock buildings. The method involved measurement of the rotational speed of a freely rotating impeller, which was installed upstream or downstream of the exhaust fan. Laboratory tests showed a linear relationship between impeller rotational speed and fan airflow rate (R2>=0.99; p<0.05). The upstream position with respect to the fan provided better performance than the downstream position. For the axial fans tested with this setup and at a fan static pressure of 25 Pa, the absolute deviations of predicted from measured values ranged from 36 to 78 m3/h. Additionally, this setup had only slight effects on the performance of the smaller fans (30 and 41 cm). This study demonstrated the potential of this method for continuous measurement of fan airflow rates in livestock buildings.
Evaluation of a freely rotating impeller to measure fan airflow rates in livestock buildings
This study was conducted to develop and evaluate a method to continuously measure fan airflow rates in livestock buildings. The method involved measurement of the rotational speed of a freely rotating impeller, which was installed upstream or downstream of the exhaust fan. Laboratory tests showed a linear relationship between impeller rotational speed and fan airflow rate (R2>=0.99; p<0.05). The upstream position with respect to the fan provided better performance than the downstream position. For the axial fans tested with this setup and at a fan static pressure of 25 Pa, the absolute deviations of predicted from measured values ranged from 36 to 78 m3/h. Additionally, this setup had only slight effects on the performance of the smaller fans (30 and 41 cm). This study demonstrated the potential of this method for continuous measurement of fan airflow rates in livestock buildings.
Evaluation of a freely rotating impeller to measure fan airflow rates in livestock buildings
Maghirang, R.G. (author) / Liu, Yanyan (author) / Chung, Do-Sup (author)
Transactions of the ASAE ; 41 ; 819-824
1998
6 Seiten, 9 Quellen
Article (Journal)
English
Multizone airflow models for calculating infiltration rates in commercial reference buildings
| Online Contents | 2013