Proposal of Three Methods for Deriving Representative Mean Radiant Temperatures Considering Zone Spatial Distributions

Sung-Jin Kwon, Jae-Hun Jo and Dong-Seok Lee ()
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Sung-Jin Kwon: Department of Architecture, Keimyung University, Daegu 42601, Republic of Korea
Jae-Hun Jo: Division of Architecture, Inha University, Incheon 22212, Republic of Korea
Dong-Seok Lee: Department of Architectural Engineering, Keimyung University, Daegu 42601, Republic of Korea

Energies, 2024, vol. 17, issue 20, 1-19

Abstract: Mean radiant temperature (MRT), which is a crucial factor for thermal comfort, varies within a space. This renders deriving the representative values for radiant heating and cooling control challenging. This study reviewed existing methods for deriving MRT in previous research and addressed their limitations by proposing a method for determining a representative MRT value. The existing methods were categorized as air temperature, single location, and area weighted. Three methods for deriving representative MRT values were proposed, considering the building’s usage, scale, and applicable system installations. The proposed methods were categorized as single-zone averaged, multi-zone averaged, and point-zone MRT. Experiments were conducted by distinguishing cases based on the control of equipment systems during heating and cooling periods. During the cooling season, the single-zone averaged MRT and air temperature differed by up to 4 °C, and the difference between the multi-zone averaged MRT and MRT at a point in the perimeter zone reached up to 7 °C. During the heating season, the single-zone averaged MRT and air temperature differed by up to 2.2 °C. Thus, the results of this study emphasize the importance of applying different methods of deriving representative MRT values depending on the size and usage of the building, and demonstrate that this facilitated more effective heating and cooling control systems.

Keywords: mean radiant temperature; longwave and shortwave radiation; spatial distribution; thermal environment (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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