| Title |
A Study on The Performance of Ventilation and Thermal Environment for a Combined Type Diffuser in a Residential Space |
| Authors |
Seok-Young Lim ; Hyun-Jae Chang |
| DOI |
https://doi.org/10.6110/KJACR.2017.29.2.074 |
| Keywords |
급·배기 일체형 디퓨저 ; 폐열회수형 자연환기설비 ; 유효드래프트 온도 ; 공기 확산 성능지표 ; 공기령 Combined type diffuser of supply and exhaust ; Heat recovery type natural ventilator ; Effective draft temperature ; ADPI ; Age of air |
| Abstract |
In this study, the combined-type diffuser developed by the Authors, in a previous study, was applied to a residential space. The performance of a ventilation and thermal environment, created by the use of a combined-type diffuser was compared to the pan-type diffuser widely used in apartment houses. In cooling conditions, because of the relatively high air flow rate of ceiling cassette-type air conditioners, the characteristics of airflow distribution in a room were governed by the air conditioner's airflow. In heating conditions, because of the low air flow rate of the diffuser, the characteristics of airflow distribution were governed by the buoyancy effect created by cold external walls and a hot floor. In terms of the Air Diffusion Performance Index (ADPI), which is a thermal environmental index, the result of a combined-type diffuser was greater than a pan-type diffuser in both of cooling and heating conditions. Consequently, the combined-type diffuser showed equal or superior ventilation and thermal environment performance compared to a pan-type diffuser. |