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An experimental investigation of a passive chilled beam system in subtropical conditions.

Author(s) : HOLE A., KOSONEN R.

Summary

Chilled beam systems are effective in providing good indoor environmental quality in an energy efficient manner. However, chilled beam systems are not common in sub-tropical climates where the requested cooling capacity is much higher than in temperate climates. This paper reports the findings of physical testing undertaken on a simulated office environment when the maximum cooling capacity was 122 W/m2. Tests were also undertaken for higher theoretical heat gains (up to 164 W/m2). The mock up test environment included a 3.6 x 3.6 m zone, representing a perimeter zone of an office building in a semi sub-tropical southern hemisphere climate. The purpose of the test was to measure the internal temperature distribution and air velocities for different heat gains and also for changes in internal layout. The test results are referenced to recognised standards for occupant comfort, particularly ISO7730. The conducted measures show that the air velocities in the occupied zone were below 0.25 m/s in all tests and the draft rates were below 20% in nearly all measured points. The location of the workplace also did not have any effect on the air velocities within the space. This shows that passive beam system, including cooled mechanical ventilation, is possible to cover the requested cooling capacity in sub-tropical conditions without any draft.

Details

  • Original title: An experimental investigation of a passive chilled beam system in subtropical conditions.
  • Record ID : 2008-2671
  • Languages: English
  • Source: Clima 2007. WellBeing Indoors. Proceedings of the 9th REHVA World Congress [CD-ROM + Abstract book].
  • Publication date: 2007/06/10

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