| Title |
Ventilation Rates in the Classrooms with Windows made of Korean Traditional Paper(Hanji) |
| Authors |
Hwang Hye-Young ; Lee Jong-Won |
| Keywords |
Hanji ; Classrooms ; Ventilation ; Infiltration ; CO2 Concentrations |
| Abstract |
Though indoor air quality in school classrooms is important, occupants are likely to close windows in winter because of thermal comfort. Korean traditional paper, Hanji, is material which can be replaced with window glasses. Natural ventilation by wind and thermal forces occurs through Hanji that can breathe. We replaced glass windows by windows made of Hanji in middle school classroom, then measured CO2 concentrations compared common classroom which have glass windows when students are present in the rooms for three days last winter. From such measurements ventilation rates are estimated indirectly from carbon dioxide constant injection technique. As a results, the average air change rate is 1.39ACH in Hanji classroom while is 0.85ACH in glasses classroom. In other words, ventilation rates increased 0.54ACH through Hanji. The differences in temperature in two rooms are little despite increasing ventilation rates in Hanji classroom. |