Dynamic Thermal Performance and Controllability of Fan Coil Systems

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceeding


In order to characterize and control a system properly, it is inevitably necessary to understand and define the interactions between various design parameters and the controllability of the system. This study experimentally investigates effects of three design parameters, including supply water temperature, fan speed, and room heat load, on the dynamic response of a fan coil system. The experiments have been performed in a mock-up of an office room equipped with a fan coil unit (FCU). A direct ground cooling system has been used to supply the FCU with high-temperature chilled water ranging between 15 and 23 °C. The dynamic response of the system to step changes in the design parameters has been studied using room operative temperature as an indicator. The results of this study indicate that the system behaves as a first-order system without a time delay. The results also suggest that the time constant and the characteristic of the dynamic response of the fan coil system are not affected by the initial room temperature. Among the design parameters, fan speed is observed to have the most significant effect on the dynamic response of the system. Supply water temperature and room heat load are both found to have insignificant effects on the dynamic response characteristics of the system.


  • Taha Arghand
  • Anders Trüschel
  • Jan-Olof Dalenbäck
  • Saqib Javed
External organisations
  • Chalmers University of Technology
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Building Technologies


  • Controllability, Fan coil unit, Dynamic response
Original languageEnglish
Title of host publicationCold Climate HVAC 2018
Subtitle of host publicationSustainable Buildings in Cold Climates
EditorsDennis Johansson, Hans Bagge, Åsa Wahlström
ISBN (Electronic)978-3-030-00662-4
ISBN (Print)978-3-030-00661-7
Publication statusPublished - 2018 Dec 12
Publication categoryResearch
Externally publishedYes
EventCold Climate HVAC 2018: The 9th International Cold Climate Conference, Sustainable new and renovated buildings in cold climates - Kiruna, Sweden
Duration: 2018 Mar 122018 Mar 15

Publication series

NameSpringer Proceedings in Energy
ISSN (Print)2352-2534
ISSN (Electronic)2352-2542


ConferenceCold Climate HVAC 2018
Abbreviated titleCold Climate HVAC 2018