Initial Development of a Combined PCM and TABS Solution for Heat Storage and Cooling

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This paper investigates heat storage and cooling concept that utilizes both phase change material (PCM) and a thermal active building system (TABS) implemented in a hollow core concrete deck element. PCMs are promising materials for improving the heat storage capacity of a building due to their significant thermal energy storage capabilities. The TABS has a potential for increasing the exploitation of the thermal mass of the building, which is rarely exposed for heat transfer.The main objective of this study is to optimize the location and amount of PCM in a hollow core deck in order to optimize heat storage capacity. A series of simulations were conducted using the COMSOL program to obtain knowledge regarding the dynamic heat storage capacity of the investigated hollow core deck element as a function of the amount and location of PCM. Furthermore, the dynamic heat storage capacity of a passive deck element and the possible cooling power of the thermally activated deck element were predicted and then compared. Finally, results obtained from precise numerical simulations in COMSOL Multiphysics were compared with results calculated in the whole building
simulation software BSim. Initial results indicate that the best location of the PCM in the hollow core concrete deck element is close to the surface that is facing to the room. Moreover, the heat transfer coefficient on the surface of the deck has a very significant impact on the heat storage capacity of the concrete deck element.
Original languageEnglish
Title of host publicationProceedings of the 9th Nordic Symposium on Building Physics : NSB 2011
EditorsJ. Vinha, J. Piironen, K. Salminen
Number of pages8
VolumeVolume 1
Place of PublicationTampere, Finland
PublisherTampere University Press
Publication date2011
ISBN (Print)978-952-15-2574-2
Publication statusPublished - 2011
EventThe 9th Nordic Symposium on Building Physics (NSB 2011) - Tampere, Finland
Duration: 29 May 20112 Jun 2011


ConferenceThe 9th Nordic Symposium on Building Physics (NSB 2011)
Internet address

Bibliographical note

PDF for print: 8 pp. The proceedings is also published on a cd. (ISBN 978-952-15-2577-3)


  • Phase Change Material
  • Thermally Activated Building System
  • Thermal Mass
  • Dynamic Heat Storage Capacity
  • Cooling


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