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고도정수처리용 내오존 불소변성 우레탄 아크릴레이트 방수·방식재의 개발을 위한 기초적 연구
노상균(Noh Sang-Kyun),김성래(Kim Sung-Rea),신홍철(Shin Hong-Chol),김영근(Kim Young-Geun) 대한건축학회 2012 大韓建築學會論文集 : 構造系 Vol.28 No.8
In this study, as a basic study for developing water proof and anti-corrosive materials that can secure durability regarding ozone environment, summary of its result is as following. As the result of observation of surface before and after ozone treatment, in case of epoxy, urea, urethane and hybrid, which are existing waterproof and anti-corrosive materials, cracks by multiple gaps and splits on the surface were generated while in case of fluorine degeneration urethane acrylate, which is ozone-resistance, waterproof and anti-corrosive material, excellent result was appeared as the surface was relatively smooth. Reduction quantity of mass before and after ozone treatment was about 10% in case of epoxy, urea, urethane and hybrid, which are existing waterproof and anti-corrosive materials, as well as fluorine degeneration urethane acrylate, which is ozone-resistance, waterproof and anti-corrosive material. Therefore, it is believed that it can be utilized as excellent ozone-resistance, waterproof and anti-corrosive material in the future if its disadvantage is supplemented and corrected through additional researches on prevention of changes of color and for securing economic feasibility.
액상형 조강제 혼입율 변화에 따른 콘크리트의 기초적 특성
노상균(Noh Sang-Kyun),김정진(Kim Jeong-Jin),이건철(Lee Gun-Cheol),이문환(Lee Mun-Hwan),한민철(Han Min-Cheol),한천구(Han Cheon-Goo) 대한건축학회 2007 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.27 No.1
This study is to development the liquid type high early strength agent considering early strength, developing strength, and economics of the concrete using admixtures. The powder type high early strength agent does not helpful because the field application is not available such as the problem of mixing process and rack of economics. To make up these subjects, the plain mixture contains the standard type AE water reducing agent, and the types of the agents are the standard type AE water reducing agent(P), liquid type high early strength agent(AD), poly carboxylate high early strength type AE water reducing agent(E1), and naphthalene + melamine high early strength type AE water reducing agent(E2). As the Contents of the agents, E1 and E2 is two types each cases, and P is one type to satisfy the target fluidity and air content, AD is three types as 0.5, 1.0,and 1.5%. Accordingly, using OPC is more effective than FA and BS for increasing the early strength of the concrete, and AD 1% is favorable for increasing the early strength to use high early strength agent.
증기 재압축을 활용한 증발공정에서 스팀 절감에 대한 연구
노상균(Sang Gyun Noh) 한국청정기술학회 2016 청정기술 Vol.22 No.4
본 연구에서는 2중 효용 증발관을 이용하여 21.0 wt%의 NaCl 수용액에서 고형물의 NaCl을 1,524.58 kg h<SUP>-1</SUP>만큼 석출시키는 공정에 대해서 증기 재압축을 활용하여 스팀 소모량을 3,139 kg h-1에서 496 kg h<SUP>-1</SUP>로 줄이는 공정에 대한 전산모사 및 최적화작업을 수행하였다. 디에틸렌 글리콜(diethylene glycol)을 포함한 NaCl 수용액을 농축시키기 위한 증발농축 공정의 전산모사를 위해서는 AspenTech사의 Aspen Plus V8.8을 활용하였으며, 중간에 냉각기를 가지는 증기 재압축 공정의 전산모사를 위해서는 Schneider Electric사의 PRO/II with PROVISION V9.4를 이용하였다. 증기 재압축 공정에 대해서는 1기의 압축기를 사용한 공정과 중간에 냉각기를 가지는 2단 압축 공정을 상호 비교하였다. In this study, modeling and optimization study have been performed to obtain 1,524.58 kg h<SUP>-1</SUP> of a solidified NaCl by evaporating a 21.0 wt% of NaCl aqueous solution in order to reduce the steam consumption from 3,139 kg h<SUP>-1</SUP> to 496 kg h<SUP>-1</SUP> using a two-stage evaporation and a vapor recompression processes. Aspen Plus release 8.8 at AspenTech was utilized for the modeling of two stage evaporation process and PRO/II with PROVISION release 9.4 at Schneider Electric was also used for the simulation of two-stage vapor recompression process with an inter-cooler. For the simulation of the evaporation process containing NaCl aqueous solution, Aspen Plus release 8.8 at AspenTech Inc. was utilized and for the modeling of vapor recompression process PRO/II with PROVISION release at Schneider Electric Inc. For the vapor recompression process, single stage compression and two-stage compression system was compared.