초미세 입자 제거를 위한 다공성 건축자재 개발 = Development of the porous construction materials for the removal of ultra fine particles

다국어 초록 (Multilingual Abstract)

Recently, the high performance of the insulation and the air tightness, according to the increase of the energy price, has been caused the lack of the ventilation, which is a negative factor in the sense of the indoor air quality. This has been provided an opportunity to re-recognize the importance of the mechanical or natural ventilations. Even though some mechanical ventilation systems using Total heat exchangers are adopted, as an active respond, the system cannot be referred to be a perfect alternative, since it consumes the extra power and it only allows the restricted amount of ventilations, compared to the past life customs of opening the windows and supply large amount of air during a rather short time. Also, Korea has been damaged more seriously by the increase of the micro particle dusts, because of the yellow dust from China and the air pollution. Therefore, this study aims to develop the porous construction material in HEPA type, which will constitute a part of the breathing wall technology, that is an alternative to improve the indoor air qualities. Particularly, this study aims to develop the porous construction material to collect airborne particles such as the yellow dust, that insures the sufficient ventilation performance. In order to achieve the good of the study, a test of the efficiency, the pressure drop, the water vapor permeability, the coefficient of water vapor permeability, the water vapor resistance factor and the U-value were conducted. The results of the experiment are as below.

1) The double layer filter, which has 30㎛ in diameter at the conditions of 10wt% of concentration and 3kV/cm of the electric intensity, is produced by electrospinning.
2) The filtration coating technology is confirmed in the solution with SiO2 nano particles using polymer nano fibers. Also double layer filters are coated with SiO2 nano particles and finally the porous construction materials are made by sintering in the electric furnace at 200～1400℃.
3) The efficiency is measured 96.7% at the particle size of 0.31 ㎛, which is slightly lower than HEPA filter. However the efficiency is turned out to be sufficient. The Pressure drop is measured 15.45 at the face velocity of 3 which is slightly lower than HEPA filter.
4) The average coefficient of water vapor permeability shows 3.63 g/㎡․h․㎜Hg and the average water vapor resistance shows 0.3㎡․h․㎜Hg/g. The average water vapor resistance factor shows 53.89, which is slightly bigger than media of Heat exchanger(30.82), Hanji(31.78) and Heraklith(3.57).
5) The U-value is 0.044 , which is much lower than 0.47 of the case, that the outer walls are exposed to the air directly, and is turned out to have the very high insulation effectiveness.

목차 (Table of Contents)

• Ⅰ. 서 론 1
• 1.1 연구 배경 및 목적 1
• 1.2 선행연구 3
• 1.3 연구 내용 및 범위 7
• Ⅱ. 환기 관련 법규 및 기준 검토 12
• 2.1 법규 12
• 2.2 기계환기설비 기준 13
• 2.3 자연환기설비 기준 14
• Ⅲ. 다공성 건축자재 제조 16
• 3.1 전기방사법 17
• 3.1.1 전기방사 원리 17
• 3.1.2 실험 장치 및 방법 19
• 3.1.3 섬유 형상 분석 22
• 3.2 코팅 및 소결 26
• Ⅳ. 다공성 건축자재 성능 평가 33
• 4.1 분집 포집효율 및 통기성 34
• 4.1.1 분진 포집 원리 34
• 4.1.2 성능 평가 방법 37
• 4.1.3 성능 평가 장치의 설계 및 제작 41
• 4.1.4 성능 평가 결과 44
• 4.2 투습성 48
• 4.2.1 성능 평가 장치 및 방법 48
• 4.2.2 성능 평가 결과 52
• 4.3 열전도율 56
• 4.3.1 성능 평가 장치 및 방법 56
• 4.3.2 성능 평가 결과 60
• 4.4 굴곡강도 63
• 4.4.1 성능 평가 장치 및 방법 63
• 4.4.2 성능 평가 결과 66
• Ⅴ. 결론 68
• 참고문헌 70
• Abstract 76