Air Distribution in a Room with an Active Chilled Beam - and a Comparison with other Ventilation Systems

Peter Vilhelm Nielsen, Li Liu, Bartosz Kozlowski, Sandijs Vasilevskis, Rasmus Lund Jensen

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review


Active chilled beam cooling is a solution with an efficient use of space due to the high heat capacity of water used as heat transfer medium. This paper describes the prediction of the room air distribution in a room with an active chilled beam. It also shows a design chart that makes it possible to assess variables such as air quality, air velocity and the temperature gradient as a function of flow rate and temperature difference in the supply system and this paper gives the limits for the use of the system.

The paper shows that an active chilled beam system can generate a thermal comfort level at a given heat load and heat load distribution that can be compared with the thermal comfort obtained by the different mixing ventilation systems. The air distribution is dependent of the heat load distribution, and the system has a limited capacity with respect to fresh air supply. The system is compared with seven other air distribution systems. The paper is based on both full-scale measurements and CFD predictions.
Original languageEnglish
Title of host publicationRoomvent & Ventilation Proceedings
EditorsRisto Kosonen, Mervi Ahola, Jarkko Narvanne
Place of PublicationHelsinki
PublisherSIY Indoor Air Information Oy
Publication date2018
Article number32
ISBN (Electronic)978-952-5236-48-4
Publication statusPublished - 2018
EventRoomvent 2018: International Conference on Air Distribution in Rooms - Aalto University, ,Finland, Espoo, Finland
Duration: 2 Jun 20185 Jun 2018


ConferenceRoomvent 2018
LocationAalto University, ,Finland
Internet address

Bibliographical note

Track 2 – Air Distribution: Air Distribution (AD1)


  • Room air distribution
  • Active chilled beam
  • Comfort conditions
  • Design chart
  • CFD

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