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시험용 건축자재 표면의 물질전달율 제어를 위한 소형챔버 내의 기류제어 유닛의 개발
서장후(Seo Jang-Hoo),이선우(Lee Sun-Woo),조민관(C ho Min-Kwan) 대한건축학회 2008 대한건축학회논문집 Vol.24 No.8
The purpose of this study is to develop the airflow control-unit in the small test chamber for controlling the mass transfer coefficient on the surface of testing material. The mass transfer coefficient is a very important parameter in the test for measuring chemicals emission rates and the performance test of sorptive building materials with a small test chamber. The mass transfer coefficient reduced vapor of surface of testing material in 20L small test chamber is 2∼3m/h, which is smaller than it of japanese industrial standards and do not correspond to an actual condition in the room. In this paper, the water vapor mass transfer coefficients and emission rates of water were measured under various wind velocity on surface of testing material using both experiments and computational fluid dynamics analysis. While the average wind velocity over the testing material of 9.31×10<SUP>-2</SUP>m/s was controlled, the evaluated mass transfer coefficient corresponded well to an actual condition in the room. And the emission test and sorption test will be precisely evaluated by using the airflow control-unit in the small test chamber.
취출구의 위치가 오염물질 흡착건재의 성능에 미치는 영향
서장후(Seo Jang-Hoo),이세은(Lee Se-Eun),박성현(Park Sung-Hyun) 대한건축학회 2011 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.31 No.2(계획계)
Recently, It’s affected by indoor air flow to improve indoor air quality has been the increasing use for sorptive building materials. The lab found out by the CFD how well the sorptive building materials can react to the contaminating matter called toluene when occurred on the ground as an external diffusion depending on the location of the diffuser. The case were installing the inlet and the sorptive building materials on the same side and the opposite. as a result of case1 which is installing on the same side the adsorption kinetics increased approximately 64.34% and 76.04% this can be concluded that the air flow velocity highly influences the sorptive building materials.
오염물질 흡착건재의 배치 및 면적이 실내 오염물질 농도 저감에 미치는 영향
서장후(Seo Jang-Hoo),이은미(Lee Eun-Mi),박성현(Park Sung-Hyun) 대한건축학회 2011 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.31 No.2(계획계)
Recently, interest and use of pollutant concentration reduction construction materials for IAQ elevation are increasing In this research, toluene that is pollutant through CFD analysis is generated to external diffusion at floor and when indoor is ventilation system by mutual-assistance system, calculated adsorption speed estimation data of indoor pollutant concentration reduction effect and pollutant adsorption being ,well that is produced according to arrangement area of pollutant adsorption being well and each Case established in case of is no adsorption being well in equal environmental condition, or was arranged in wall of 1 pace and 3 face. As a result, when adsorption being well is 1 face and 3 face, estimate that indoor pollutant reduction effect of concentration is considerable in case of wall of 3 face consists of adsorption being well because indoor pollutant concentration decreases each 9.7%, 30.4%
서장후(Janghoo Seo) 대한설비공학회 2011 설비공학 논문집 Vol.23 No.5
Semi volatile organic compounds (SVOCs) are used as plasticizers in building materials, interior materials, furniture, consumer electronics, etc. In the home, these SVOCs mix together with house dust. There is thus concern over the health effects of SVOCs in the home. there is a risk that they influence childhood asthma and allergies. It is difficult to measure SVOCs emission rates from building materials or household appliances utilizing the usual test chamber methods, because the boiling points of SVOCs are higher and they are apt to adhere to the surface of the test chamber used. In this study, we introduce FLEC chamber method, passive sampler method and micro chamber method, which are used in Germany and Japan in order to measure SVOCs emission rates. Characteristic, merits and demerits of test methods are also considered.
실험과 CFD해석을 이용한 실내 오염물질 흡착건축자재의 성능검증에 관한 연구
서장후(Seo Jang-Hoo) 대한건축학회 2008 대한건축학회논문집 Vol.24 No.9
The concentration of the pollutant in rooms depends not only on the emission and ventilation rates, but also on adsorption by the room surfaces. The use of sorptive building materials as room surface seems effective for decreasing the pollutant concentrations that have the possibility of affecting human health. In this paper, the effects of sorptive building materials with respect to decreasing aldehydes concentrations in air were evaluated using the small test chamber. Air containing a low concentration of aldehydes was supplied, and the decrease in aldehydes concentration was measured at the exhaust. We evaluated the performance for the aldehydes decreasing effect of kinds of sorptive building material. The formaldehyde-decomposing gypsum board had a more decreasing effect than any other sorptive building materials, which was well reproduced experimentally with the computational fluid dynamics (CFD) simulations.
서장후(Janghoo Seo) 대한설비공학회 2012 설비공학 논문집 Vol.24 No.12
Recently, the indoor air pollution by microbes such as fungi and mites have become a concern as important research topic on indoor air quality. Fungal growth is significantly affected by humidity. In this study, we examined the influence of relative humidity on the surface of building materials and the water content of building materials on the fungal growth rate by measuring the mycelium length of fungi in the fungal detector placed on the surface of building materials. As a result, even if the relative humidity on the surface of building materials is identical, the more water content of building materials is, the more fungi grow faster. It was suggested that fungal growth rate depends on not only the relative humidity on the surface of building materials but also the water content of building materials.
실내 아세트알데히드 농도 저감형 건축자재의 성능 평가 및 영향인자
서장후(Janghoo Seo) 한국건축친환경설비학회 2011 한국건축친환경설비학회 논문집 Vol.5 No.2
The use of sorptive building materials on room surfaces seems effective for decreasing VOCs and aldehydes concentrations that have the possibility of affecting human health. Giving the construction materials themselves the property of reducing the concentration of indoor pollutants has been reported as simple and effective, because it is highly effective without requiring the operation of special equipment. In this study, we evaluated the effects of sorptive building materials with respect to decreasing acetaldehyde concentrations in air using a small test chamber. we examined how the concentration of chemical compounds, temperature, and relative humidity influenced the sorptive performance for acetaldehyde, which was well reproduced experimentally with the computational fluid dynamics (CFD) simulations. The experiments and CFD analysis show that sorptive building materials have a fairly strong effect of decreasing acetaldehyde concentrations in rooms, and that this effect can be expected in practical use.