Thermal Comfort in Simulated Office Environment with Four Convective and Radiant Cooling Systems

Zhecho Dimitrov Bolashikov, Panu Mustakallio, Sona Kolencíková, Kalin Kostov, Arsen Krikor Melikov, Risto Kosonen

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    Experiments with 24 human subjects in a simulated office with four cooling systems were performed. The systems were: chilled beam (CB), chilled beam with integrated radiant panel (CBR), chilled ceiling with overhead mixing ventilation (CCMV) and four desk partition mounted radiant cooling panels with overhead mixing ventilation (MVRC). Whole body thermal sensation (TS) and whole body TS acceptability under the four systems in a simulated office room for one hour exposure were collected. The simulated two-man office (4.12 x 4.20 x 2.89 m, L x W x H) was kept at 26 oC room air temperature. Moderate heat load of 64 W/m2 was generated by simulated solar heat load, 2 laptops and 2 occupants, giving in total 1104 W. The supplied outdoor air temperature was kept at 16 oC. The supply air flow rate for CB, CBR and CCMV was set to 26 L/s (category II low-polluting building, EN 15251-2007). For MVRC supply airflow of 44 L/s was set in order to maintain 26 oC room air temperature. Under the studied conditions, all four systems showed similar performance with respect to whole body TS: occupants felt between “neutral” to “slightly warm” on the TS scale in EN 15251-2007. Female felt whole body TS closer to “neutral” compared to male, whose votes were closer to the “slightly warm” thermal sensation. The whole body TS acceptability was rated close to ''clearly acceptable'' (EN 15251-2007) and was independent of subject's gender for all tested systems.
    Original languageEnglish
    Title of host publicationProceedings of 11th REHVA World Congress and the 8th International Conference on Indoor Air Quality, Ventilation and Energy Conservation in Buildings
    Number of pages10
    Publication date2013
    Article numberPaper ID: 375
    Publication statusPublished - 2013
    EventClima 2013: 11th REHVA World Congress & 8th International Conference on IAQVEC - Prague Congress Centre, Prague, Czech Republic
    Duration: 16 Jun 201319 Jun 2013
    Conference number: 11


    ConferenceClima 2013
    LocationPrague Congress Centre
    Country/TerritoryCzech Republic
    Internet address


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