![]() ![]() ![]() Test subjects who experienced the pavilion ( n 37) reported a satisfactory thermal sensation 79 of the time, despite experiencing 29.6 0.9 C air at 66.5 5 relative humidity and with low air movement of 0.26 0.18 ms 1.Ĭomfort was achieved with a coincident mean radiant temperature of 23.9 0.8 C, requiring a chilled water-supply temperature of 17.0 1.8 C. We constructed a demonstrative outdoor radiant-cooling pavilion in Singapore that used an infrared-transparent, low-density polyethylene membrane to provide radiant cooling at temperatures below the dew point. This work directly challenges these views and provides proof-of-concept solutions examined for a transient thermal-comfort scenario. The lack of widespread commercial adoption of radiant-cooling technologies is due to two widely held views: 1) The low temperature required for radiant cooling in humid environments will form condensation and 2) cold surfaces will still cool adjacent air via convection, limiting overall radiant-cooling effectiveness. Thermal radiation exchange between occupants and surfaces in the built environment can augment thermal comfort. The results from this thermal-comfort study demonstrate the ability to keep people comfortable with radiation in warm air, a paradigm-shifting approach to thermal comfort that may help curb global cooling-demand projections.Ībstract We present results of a radiant cooling system that made the hot and humid tropical climate of Singapore feel cool and comfortable. ![]()
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February 2023
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