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Performance of chilled beam with radial swirl jet and diffuse ceiling air supply in heating mode.

Number: pap. 30

Author(s) : BERTHEUSSEN B., MUSTAKALLIO P., MELIKOV A., et al.

Summary

The performance of a diffuse ceiling air supply and a chilled beam with a swirl jet (CSW) in heating mode (winter situation) was studied and compared with regards to the generated indoor environment. An office mock-up with one occupant was simulated in a test room (4.5 x 3.95 x 3.5 m3 (L x W x H)). A window (6.5 m2) with a cold surface (14°C) was simulated by radiant panels. Four CSW chilled beam units were installed symmetrically on the suspended ceiling together with two exhaust vents. The diffused ceiling inlet was made of standard perforated acoustic tiles (0.5% total degree of perforation). The room air temperature was kept at 21°C. Tracer gas was used to simulate pollution from the floor and desk. The experimental conditions comprised: 1) night time without heat sources in the room; the room air conditioning system was used to heat up the room; 2) a heat load generated by an occupant (simulated by a dressed thermal manikin) and a laptop; 3) heating by convectors positioned under the window (convectors used alone and convector used together with CSW supplying isothermal air for ventilation). The heat distribution provided by the systems was not effective compared to the distribution provided by convector. The tracer gas concentration in the occupied zone was considerably higher than the concentration at the exhaust. A considerably higher airflow rate (2.5– 5.9 times higher) than the minimum ventilation rate required in the standards was required to guarantee indoor air quality.

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Pages: 10 p.

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Details

  • Original title: Performance of chilled beam with radial swirl jet and diffuse ceiling air supply in heating mode.
  • Record ID : 30008548
  • Languages: English
  • Source: Clima 2013. 11th REHVA World Congress and 8th International Conference on Indoor Air Quality, Ventilation and Energy Conservation in Buildings.
  • Publication date: 2013/06/16

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