Evaluation of a full-scale uniflow aerodynamic deduster in a swine building

G. Allan Zhao, Yuanhui Zhang

Research output: Contribution to journalConference articlepeer-review


A prototype uniflow aerodynamic deduster, a device aero-dynamically separating dust from airstream, was installed and evaluated in a swine nursery room. Three factors affecting dust particle cut-size and dust separation efficiency were evaluated: the length of the deduster chamber, air velocity in the deduster chamber, and the ratio of the outlet duct R3 to the inner duct R1. The uniflow aerodynamic deduster effectively reduced the dust concentration in the air. The dust separation efficiency varied from 7% to 20% for particles of 1.0 μm to 2.0 μm, 30% to 67% for particles of 4.0 μm to 5.0 μm, and 40% to 80% for particles larger than 5 μm. The radius ratio of R3 to R1 significantly affected the dust separation efficiency. Of the three radius ratios (0.7, 0.9, and 1.15), 0.9 gave the highest dust separation efficiency at air velocities of 3 m/s and 6 m/s (9.8 ft/s and 19.7 ft/s). It was suggested that the ratio R3 to R1 should be designed close to unity. Increasing the tangential air velocity did not always increase the dust separation efficiency because the turbulence intensity increased with the tangential air velocity and, thus, reduced the dust separation efficiency.

Original languageEnglish (US)
Pages (from-to)1707-1713
Number of pages7
JournalASHRAE Transactions
Issue numberPt 1B
StatePublished - 1998
EventProceedings of the 1998 ASHRAE Winter Meeting. Part 1 (of 2) - San Francisco, CA, USA
Duration: Jan 18 1998Jan 21 1998

ASJC Scopus subject areas

  • Building and Construction
  • Mechanical Engineering


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