Evaluation of a freely rotating impeller to measure fan airflow rates in livestock buildings

R. G. Maghirang, Y. Liu, D. S. Chung

Research output: Contribution to journalArticlepeer-review

Abstract

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 alan 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 era). This study demonstrated the potential of this method for continuous measurement of fan airflow rates in livestock buildings.

Original languageEnglish (US)
Pages (from-to)819-824
Number of pages6
JournalTransactions of the American Society of Agricultural Engineers
Volume41
Issue number3
StatePublished - May 1 1998
Externally publishedYes

Keywords

  • Animal housing
  • Environmental control
  • Mechanical ventilation
  • Ventilation rate

ASJC Scopus subject areas

  • Agricultural and Biological Sciences (miscellaneous)

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