TY - GEN
T1 - Mean Radiant Temperature Sensing
T2 - 15th REHVA HVAC World Congress, CLIMA 2025
AU - Özbey, Mehmet Furkan
AU - Licina, Dusan
AU - Meggers, Forrest
AU - Khovalyg, Dolaana
N1 - Publisher Copyright:
© The Author(s), under exclusive license to Springer Nature Switzerland AG 2026.
PY - 2026
Y1 - 2026
N2 - Non-uniform radiant floor heating is increasingly explored for improving localized and personalized thermal comfort. Accurate mean radiant temperature (Tr) measurement is crucial due to its separation from air temperature (Ta) unlike convective systems. This study evaluates the accuracy of Tr obtained using the globe thermometer versus a novel mini.RES cube sensor and examines the differences between Ta and Tr in non-uniform heating environments. Experiments were conducted in a 62 m3 climatic chamber in Fribourg, Switzerland, with four cases: one without heating, two with non-uniform heating to simulate radiant asymmetry, and one with uniform heating for comparison. Additionally, an uncertainty analysis was performed to evaluate measurement precision for the Tr measurements using the globe thermometer. The results indicate that the globe thermometer method can introduce errors of up to 4% in determining the Tr. Moreover, the uncertainty values for the Tr values were found between 1.60 ℃ and 2.31 ℃. In cases with non-uniform heating available, the Tr was found to vary by more than 2 ℃ than the Ta, highlighting the need to consider Tr separately when assessing thermal comfort. These findings emphasize the error of obtaining the Tr with globe thermometer and the difference between Tr and Ta in non-uniform heating scenarios.
AB - Non-uniform radiant floor heating is increasingly explored for improving localized and personalized thermal comfort. Accurate mean radiant temperature (Tr) measurement is crucial due to its separation from air temperature (Ta) unlike convective systems. This study evaluates the accuracy of Tr obtained using the globe thermometer versus a novel mini.RES cube sensor and examines the differences between Ta and Tr in non-uniform heating environments. Experiments were conducted in a 62 m3 climatic chamber in Fribourg, Switzerland, with four cases: one without heating, two with non-uniform heating to simulate radiant asymmetry, and one with uniform heating for comparison. Additionally, an uncertainty analysis was performed to evaluate measurement precision for the Tr measurements using the globe thermometer. The results indicate that the globe thermometer method can introduce errors of up to 4% in determining the Tr. Moreover, the uncertainty values for the Tr values were found between 1.60 ℃ and 2.31 ℃. In cases with non-uniform heating available, the Tr was found to vary by more than 2 ℃ than the Ta, highlighting the need to consider Tr separately when assessing thermal comfort. These findings emphasize the error of obtaining the Tr with globe thermometer and the difference between Tr and Ta in non-uniform heating scenarios.
KW - Localized Heating
KW - Mean Radiant Temperature
KW - Radiant Floor
UR - https://www.scopus.com/pages/publications/105023585665
UR - https://www.scopus.com/pages/publications/105023585665#tab=citedBy
U2 - 10.1007/978-3-032-06806-4_72
DO - 10.1007/978-3-032-06806-4_72
M3 - Conference contribution
AN - SCOPUS:105023585665
SN - 9783032068057
T3 - Lecture Notes in Civil Engineering
SP - 753
EP - 761
BT - Proceedings of the 15th REHVA HVAC World Congress - CLIMA 2025 - Volume 1
A2 - Zilio, Claudio
A2 - Noro, Marco
A2 - Busato, Filippo
A2 - Mazzarella, Livio
PB - Springer Science and Business Media Deutschland GmbH
Y2 - 4 June 2025 through 6 June 2025
ER -