| Keywords |
Ceiling radiant cooling panel; Perforation; Reverberation time; Clarity; Speech privacy |
| Abstract |
In this study, heat transfer and acoustic performance of perforated ceiling radiant cooling panels were analyzed by varying in porosity rate, porosity diameter, and panel thickness, and the sound absorption coefficient, reverberation time (T30), intelligibility (C50 and D50), and speech privacy indicators (rD, rP) based on acoustic simulation. The results showed that higher porosity, smaller pore diameter, and thinner panel thickness decreased the reverberation time (T30: 0.77 s) and improved clarity (C50: 5.2 dB and D50: 0.72%). In particular, the combination of 15% porosity, 0.5 mm diameter, and 15 mm thickness showed the best performance, effectively improving the speech disturbance distance (rD: 6.04 m) and speech privacy distance (rP: 11.03 m). Increasing the perforation rate decreased the heat transfer performance but improved the acoustic performance, which is a compromise to optimize the acoustic environment while minimizing heat transfer losses. This study provides practical design guidelines for improving acoustic performance in the design of perforated ceiling radiant panels, and suggests the need for further research to validate the simulation results in real environments. |