| Title |
A Study on the Thermal/Airflow Characteristics of an Apartment House with a Natural Supply and Mechanical Exhaust System |
| Authors |
Kim Moo-Hyun ; Hwang Ji-Hyeon |
| Keywords |
Ventilating Flow Rate ; Thermal Comfort ; CFD Technique ; Acceptable Criteria |
| Abstract |
A hybrid ventilation system, composed of a natural supply inlet and mechanical exhaust, was predicted numerically for an apartment. Analysis was performed using Computational Fluid Dynamics (CFD) for ventilating flow rate of 60m3/h for the living room-kitchen region and 180m3/h for the whole apartment region. The heating period chosen in this study reflects how residents are usually exposed to poorer indoor environments in winter. An effort was made to create acceptable residential comforts regarding air current, temperature and CO2 concentration distributions. The results show that an ACH of 0.7 or greater seems to be a reasonable value for the permissible minimum ventilation flow rate in occupied zones. The results also show that for a ventilating flow rate of 60m3/h, some acceptable criteria are satisfied and residents achieve comfort. In case of the whole region with 180m3/h and 288K, however, residents no longer feel as comfortable with regard to thermal conditions and energy losses occur. |