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Methyl ethyl Ketone - Alcohol 계의 기액평형에 있어서 비휘발도와 액조성과의 관계
박원규,정백영,심홍섭 한국화학공학회 1972 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.10 No.6
Vapor-liquid equilibrium data for the binary systems of methanol-methyl ethyl ketone, ethanol-methyl ethyl ketone, methyl ethyl ketone-n-propanol and methyl ethyl ketone-n-butanol were investigated. In these systems, vapor-liquid equilibrium data for methyl ethyl ketone-n-propanol and methyl ethyl ketone-n-butanol system were measured under atmospheric pressure. In order to confirm the accuracy of experimental results, the x-y data obtained are thermodynamically analyzed with the Herington's consistency test, and checked with the relations of activity coefficients and Q-functions to the liquid phase compositions. It was shown that the logarithmic value of relative volalility (log α) exhibited a linear function of the liquid composition (x) for systems. And these linear relationships for each of four systems indicate a strong tendency falling into a single point, when each line is extended. The present study proposed the empirical equations by which x-y data for each binary system of methyl ethyl ketone-alcohols can be estimated. And the x-y data estimated by the proposed equations are compared with the experimental data, and proved to be in a good coincidence with them.
아파트 단지 내 수경시절의 이용 및 관리질태 분석 : 광주광역시를 대상으로
박원규,이치헌 호남대학교산업기술연구소 2009 산업기술연구논문집 Vol.15 No.-
This study was purposed to get the data about waterscape facilities design in apartment complex through investigated use and maintenance condition of waterscape facilities in apartment complex. In this study, actual conditions of waterscape facilities in 10 apartment complex were analyze through observation and interview. Results of this study are as the follows. Mostly, waterscape facilities are constructed at entη space of apartment complex. Comparatively they used actively, but the number of operating days have a gap on each apartment complex The biggest problem is the maintenance cost , the next problem are the quality of water and the noise. Accordingly, when we construct waterscape facilities in apartment complex, the consideration points is a design of the low cost waterscape facilities in maintenance. 본 연구의 목적은 아파트단지의 수경시설에 대한 이용 및 관리실태를 조사·분석하여 향후 아파트 단지 내 거주자의 이용과 관리에 적합한 수경시설 설계가 가능하도록 기초자료를 마련하고자 하였다. 10 개 단지를 관찰과 인터뷰를 통해 분석하였으며, 분석결과 수경시설은 아파트 진입공간에 가장 많이 조성되었으며 비교적 이용이 활발한 편이나, 가동 일수는 단지별로 상당한 차이가 있었다. 관리상의 가장 큰 문제는 관리비 문제로 파악되었으며, 그 외 수질, 소음 등의 문제점을 제기 하고 있다 따라서 아파트 단지 내 수경시설을 설치하는 경우 가장 고려되어야 할 점은 관리비가 적게 소요되는 수경시설의 설계이다.
저농도 탄산 칼시움(Ca)슬러리의 여과저항에 미치는 농도의 영향
박원규,강석호 한국화학공학회 1966 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.4 No.1
The Korean diatomaceous earths as a filter aid is under the research. The American Decalite Speedplus as a standard to be compared with the natives was precoated on two kinds of filter-media to filter the dilute calcium carbonate slurry. The one filter-medium, glass filter, was used, but had poor reproducibility of its glass pores. The other filter-medium, a Bu¨chner filtering funnel covered with a kind of plain-weaved nylon cloths, was appreciable for the vacuum filtration of the slurry. The mean specific cake resistance α and the filter-medium resistance R for these media were observed in the range of the slurry concentration from 0.1% to 1.0% by weight. According to the gradual increasing of the CaCO_3 slurry concentrations, the mean specific cake resistance α are decreased and the filter medium resistances R are increased. As far as the thickness of the filter cake formed is of the range from 0.4cm to 1.5cm, the R/α ratios for the non-precoated glass filter are varied from 0.10 to 0.30, for the non-precoated nylon cloths and Bu¨chner funnel; from 0.05 to 0.40, and for the precoated nylon cloths and Bu¨chner funnel; from 0.05 to 0.20, respectively.
조경시설물 목재기둥의 균열하자 분석 : 미송 목재기둥의 균열을 중심으로
박원규 호남대학교 산업기술연구소 2012 녹색산업연구 Vol.18 No.2
본 연구는 목재 조경시설물 제작에 많이 사용되는 미송을 대상으로 균열하자 현황을 조사·분석하여 시공자로 하여금 목재하자 발생정도에 대한 정보를 제공함으로써 목재 선택의 판단자료를 제공하고, 목재 조경시설물의 하자저감에 기여하기 위해 수행되었다. 분석결과를 볼 때 균열하자는 전체적으로 346개소, 기둥표면적(㎡) 당 2.26개소로 조사되어 전반적으로 균열이 많이 발생하고 있으나 조사대상지별로 많은 차이가 있는 것으로 나타났다. 따라서 시공자의 품질관리 여부에 따라 하자를 저감할 수 있을 것으로 판단된다. 주요어: 미송, 목재조경시설물, 목재기둥, 균열하자, 품질관리 This research is about the cracking defects of the western hemlock which is generally used for manufacturing the wooden landscape facilities. It especially investigated and analyzed the present situation of the cracking defects, so that constructors can be provided the information about the incidence of the wooden defects. The purposes of the research are contributing to reduce the defect of the wooden landscape facilities. According to the result of the study, the cracking defects was investigated as 346 sections in general and 2.26 sections per pillar surface(㎡). Many defects were investigated over all; but there is big difference, depending on the location of the research area. Therefore, we expect it possible that the reduction of the defect according to the builder’s quality. Key words: Western Hemlock, Wooden Landscape Facilities, Wooden pillar, Cracking Defects , Quality Control