| Title |
Study on the Relationship between Indoor CO2 Concentration and Local Mean Air-age in the Lecture Room with System Air-conditioner and Ventilation Unit for Cooling Loads |
| Keywords |
CO2 concentration ; CO2 농도 ; Local mean air-age ; 국소평균공기연령 ; System air conditioner ; 시스템에어컨 ; Ventilation effectiveness ; 환기효율 ; Ventilation unit ; 환기유닛 |
| Abstract |
This study is undertaken to evaluate the relationship between the indoor CO2 concentration and the local mean air-age in the lecture room with the occupants. We conducted the experiments to examine the indoor CO2 concentration and the local mean air-age with respect to the supply airflow of the ventilation system and the discharge angle and airflow of the system air conditioner. Through the experiments, we found out that indoor CO2 concentrations calculated by the prediction equation of Seidel are about 350ppm lower than those measured by the experiments. The indoor CO2 concentration is not related with the airflow and the discharge angle of the system air-conditioner, but with the ventilation airflow. From the numerical calculation, the indoor CO2 concentration is not related with the ventilation effectiveness, but strongly with the local mean air-age. In case of our model, the indoor CO2 concentration is likely to fall within the acceptable air quality when the local mean air- age is averagely predicted under 400 seconds. |