| Title |
Development of Nano Ceramic Structures for HEPA Type Breathing Wall |
| Authors |
김종원(Jong-Won Kim) ; 안영철(Young-Chull Ahn) ; 김길태(Gil-Tae Kim) |
| Keywords |
숨쉬는 벽 ; 환기 ; 압력손실 ; 다공성 나노구조체 ; 전기방사 Breathing wall ; Ventilation ; Pressure drop ; Porous nano ceramic structure ; Electrospinning |
| Abstract |
In the perspective of saving energy in buildings, high performance of insulation and air tightness for improving the heating and the cooling efficiency has brought the positive effect in an economical view. However, these building energy saving technologies cause the lack of ventilation, which is the direct cause of increasing the indoor contaminants, and it is also very harmful to residents because they spend over 90% of their time in the indoor area. Therefore, the ventilation is important to keep indoor environment clean and it can also save energy consumption. In this study, a HEPA type breathing wall is designed as a passive ventilation system to collect airborne particles and to supply fresh outdoor air. To make fine porous structures, polymer nano fibers which were made by electrospinning method are used as a precursor. The nano fibers are coated with SiO2 nano particles and finally the HEPA type breathing wall is made by sintering in the electric furnace at 300～500℃. The pressure drops of nano ceramic structure are 8.2, 25.5 and 44.9 mmAq at the face velocity of 2.0, 5.9 and 8.8 cm/s, respectively. Also the water vapor permeability is 3.6g/㎡·h·㎜Hg. In this research, the porous nano ceramic structures are obtained and the possibility for the usage of a material for HEPA type breathing wall can be obtained. |