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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.
에너지저감을 위한 건축물 설비시스템의 최적설계에 관한 연구
서장후(Seo Jang-Hoo),안명호(Ahn Myung-Ho) 대한건축학회 2009 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.29 No.1(계획계)
Recently, the amount of energy consumption used in buildings shows a tendency to have increased. It has been reported that energy consumption in residential sector particularly is increasing because it is likely that many large-sized and high-rise apartment buildings are constructed in cities. In this research, authors propose an optimal design method for the energy system of the apartment house using Genetic Algorithm (GA) and examine the possibility for the energy conservation of a designed energy system. In this method, firstly, the cooling and heating energy demanded in apartment house is simulated by using TRNSYS. By a multi-island genetic algorithm, the optimal running pattern of building equipment systems, which is considered the type and number of equipment, capacity size, are determined to minimize the energy consumption. absorption refrigeration machine, heat pump system and photovoltaic power system are selected as cooling and hot heat, hot water and electricity supplier. Results show that a heat pump of 32 HP mainly operate through the day, and two absorption refrigeration machines (100 USRT and 120 USRT) follow to supply hot and cool heat for peak load at daytime in summer and winter.
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.
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%
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.
회수율 측정을 이용한 준휘발성유기화합물 측정용 챔버의 성능평가에 관한 연구
서장후(SEO Jang-Hoo) 한국건축친환경설비학회 2010 한국건축친환경설비학회 학술발표대회 논문집 Vol.2010 No.3
Recently, semi volatile organic compounds, which are emitted from plastics used in building materials, furnitures and home appliances, have become a concern. It is very important to evaluate emission rates of SVOC because it is reported that Di-2-ethylhexyl phthalate, one of the most generally used plasticizers, is harmful to children's asthma and allergic symptoms at home. In this study, test methods which are used in Europe and Japan as SVOC measurement method are introduced and examined. Outline and characteristic for micro chamber method is also described. In order to measure accurately SVOC, micro chamber demands both low background concentration and high recovery rates for SVOC component. Results show that recovery rates of chamber is significantly improved by carrying out silane treatment for inner wall of chamber
박성현(Park Seong-Hyun),서장후(Seo Jang-Hoo) 한국태양에너지학회 2013 한국태양에너지학회 학술대회논문집 Vol.2013 No.11
The rapid growth of data center industry has led to the vast increase in power consumption of server equipments in the data center which is operated for 365 days. Cooling power consumption for removal of heat load of server apparatuses has increased also. In this study, energy consumption is analyzed by TRNSYS simulation for domestic data center. We have also conducted the economic evaluation using Life Cycle Cost(LCC) method based on air-side economizer system adoptability. As a result, when applied a air-side economizer system, break-even point is made at most 1 years compared to central chilled water cooling system.
허지운(Ji Un Her),서장후(Jang Hoo Seo),김용성(Yong Seong Kim),이행우(Heang Woo Lee) 대한설비공학회 2017 설비공학 논문집 Vol.29 No.11
Various studies examining how to conserve building energy have been conducted recently. From such studies it has been determined that insulation performance of an aircap is viable and therefore aircaps are used as material for improving insulation performance of windows. However, the aircap for improving insulation performance of a window is attached on the front, causing infringement of the prospect right. Therefore, the purpose of this study is to develop an aircap module attached to the window through rolling, conducting performance verification throughfull-scale testbed and verifying its effectiveness. Findings of this study are as follow : 1) The module suggested in this study enables setting of an area wherein the aircap is attached through rolling so that the aircap rolls up using Velcro tape, and an insulation bar is suggested to block the gap between the aircap and window glass. 2) When the aircap is applied to the window, consumption of lighting energy increased during summer and winter by 2.8%~16.4% and 0%~76.2% respectively in comparison to no aircap application, indicating that it is unsuitable for conserving lighting energy. 3) In terms of conserving cooling and heating energy, an advantageous or effective aircap attachment method is the method whereby an aircap is attached to the front surface of a window. However, the method whereby an aircap is attached to a part of a window and where no aircap is attached increases consumption of cooling and heating energy during summer and winter by 6.0%~35.7% and 2.7%~41.6% respectively in comparison to the method wherein an aircap is attached to the front surface of a window. 4) In consideration of conserving cooling, heating and lighting energy, the attachment of an aircap to the front surface of window is the most appropriate method, and it is appropriate to attach the aircap at a position that is 1,500 mm or higher from the floor to secure the prospect right and minimize energy loss.