| Title |
A Study on the Evaluation of Air Change Efficiency of Multi-Air-Conditioner with Ventilation System for Heating Season |
| Authors |
권용일 ; 한화택 ; 김경환 ; 정백영 ; 이감규 |
| Keywords |
Air change efficiency ; 환기효율 ; Four-way-cassette heat pump ; 4way 히트펌프 ; Air diffusion performance index ; 기류분포성능지표 |
| Abstract |
Indoor air quality becomes of a concern recently in view of human health. This study investigates the air diffusion performance and the air change efficiency of a classroom, when outdoor air is introduced in addition to the heating/cooling operation of a ceiling-mounted heat pump. A CFD analysis has been performed to investigate the effect of the discharge angle of the air jets from the heat pump for both parallel and series types of outdoor air system. It is observed that the series type creates more uniform indoor environment compared to the parallel type in general. It can be concluded the discharge angle should not be larger than 40o for the parallel type, in order not to generate thermal stratification in the room. |