An experimental investigation devoted to determine heat transfer characteristics in a radiant ceiling heating system

Aliihsan Koca, Ozgen Acikgoz*, Alican Çebi, Gürsel Çetin, Ahmet Selim Dalkilic, Somchai Wongwises

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


Investigations on heated ceiling method can be considered as a new research area in comparison to the common wall heating-cooling and cooled ceiling methods. In this work, heat transfer characteristics of a heated radiant ceiling system was investigated experimentally. There were different configurations for a single room design in order to determine the convective and radiative heat transfer rates. Almost all details on the arrangement of the test chamber, hydraulic circuit and radiant panels, the measurement equipment and experimental method including uncertainty analysis were revealed in detail indicating specific international standards. Total heat transfer amount from the panels were calculated as the sum of radiation to the unheated surfaces, convection to the air, and conduction heat loss from the backside of the panels. Integral expression of the view factors was calculated by means of the numerical evaluations using Matlab code. By means of this experimental chamber, the radiative, convective and total heat-transfer coefficient values along with the heat flux values provided from the ceiling to the unheated surrounding surfaces have been calculated. Moreover, the details of 28 different experimental case study measurements from the experimental chamber including the convective, radiative and total heat flux, and heat output results are given in a Table for other researchers to validate their theoretical models and empirical correlations.

Original languageEnglish
Pages (from-to)363-375
Number of pages13
JournalHeat and Mass Transfer
Issue number2
Publication statusPublished - 1 Feb 2018
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2017, Springer-Verlag GmbH Germany.


Acknowledgements This study has been financially supported by Yildiz Technical University Scientific Research Projects Coordination Department, Project Number: 2015-06-01-KAP02. The fifth author acknowledges the support provided by the BResearch Chair Grant^ National Science and Technology Development Agency, The Thailand Research Fund, the National Research University Project and King Mongkut’s University of Technology Thonburi through the BKMUTT 55th Anniversary Commemorative Fund^.

FundersFunder number
Department of Scientific and Industrial Research, Ministry of Science and Technology2015-06-01-KAP02
National Science and Technology Development Agency
Thailand Research Fund
King Mongkut's University of Technology Thonburi
Belgorod National Research University


    • Experimental chamber
    • Heat transfer
    • Hydronic radiant ceiling system
    • Radiant heating
    • Radiant systems


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