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Is there a risk of draft in rooms with cooled ceilings? Measurement of air velocities and turbulences.

Author(s) : BEHNE M.

Summary

Measurements were made in a test room that was equipped with a radiant cooled ceiling and electrical heat sources. The experimental data consist of air velocities, turbulence intensities, cooling loads, and cooling ceiling capacities. One aim of the examination was to find a relationship between the air velocity in the occupied zone of a room and the cooling load. The influence of the cooled ceiling on the air movement should be determined and the risk of draft in rooms with cooled ceiling had to be assessed. The measurements show that the air velocity is a function of the cooling load, which causes buoyant plumes. The risk of draft was assessed by using the allowable air velocities of German and American standards, and it was found that a risk of draft can appear if the specific cooling load is more than 100 watts/m2.

Details

  • Original title: Is there a risk of draft in rooms with cooled ceilings? Measurement of air velocities and turbulences.
  • Record ID : 1996-3607
  • Languages: English
  • Source: ASHRAE Transactions.
  • Publication date: 1995/06/24
  • Document available for consultation in the library of the IIR headquarters only.

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