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강제환기식 돈사의 환기 효율성 분석을 위한 CFD 모델 개발
서일환,이인복,홍세운,황현섭,유재인,권경석,하태환,김현태,Seo, Il-Hwan,Lee, In-Bok,Hong, Se-Woon,Hwang, Hyun-Seob,Bitog, Jessie Pascul,Yoo, Jae-In,Kwon, Kyung-Suk,Ha, Tae-Hwan,Kim, Hyeon-Tae 한국농공학회 2008 한국농공학회논문집 Vol.50 No.1
When livestock facilities in Korea have been changed larger and denser, rearing conditions have been getting worse and the productivity of animal production have been decreased. Especially in the cold season, the minimized ventilation has generally been operated to save energy cost in Korea resulting in very poor environmental condition and high mortality. While the stability, suitability, and uniformity of the rearing condition are the most important for high productivity, the ventilation configuration is the most important to improve the rearing condition seasonally. But, it is so difficult to analyze the internal air flow and the environmental factors by conducting only field experiment because the weather condition is very unpredictable and unstable as well as the structural specification can not be easily changed by the researchers considering cost and labor. Accordingly, an aerodynamic computer simulation was adopted to this study to overcome the weakness of conducting field experiment and study the aerodynamic itself. It has been supposed that the airflow is the main mechanism of heat, mass, and momentum transfers. To make the simulation model accurately and actually, simplified pig models were also developed. The accuracy of the CFD simulation model was enhanced by 4.4 % of errors compared with the data collected from field experiments. In this paper, using the verified CFD model, the CFD computed internal rearing condition of the mechanically ventilated pig house were analyzed quantitatively as well as qualitatively. Later, this developed model will be computed time-dependently to effectively analyze the seasonal ventilation efficiency more practically and extensively with tracer gas decay theory.
환경설계를 활용한 재정비촉진지구내 범죄예방[CPTED] 방안: 목동아파트 입주민 의식조사를 중심으로
한형수 ( Hung Sou Han ),유재인 ( Jae In Yoo ),함주영 ( Ju Yeong Ham ) 한국감정평가학회 2009 감정평가학논집 Vol.8 No.1
There is a limit to how prevent the increase of crime as a serious social problem only with depending on the general police force, however the crime prevention system through environmental design should be needed so that it will help prevent and cope with possible crimes by restoring and refining urban spaces harmonized with modern society. Therefore, environmental design according to introduction “theory of the crime prevention through environmental design(CPTED)” in the case of a new town has been analyzed with various evidences how it has contributed in the crime prevention and the safety which advanced countries get effects with. The analyzing scope and methode is the following of the survey result of living peoples in the mock-dong apartment town which has been built since 1980 that plottage area is over 500,000㎡ as an essential condition in order to replot the re-designation of development promoted district, the analyzing problems of it suggests the direction how CPTED contributes to the goal of applications of the CPTED given that it will help prevent and cope with possible crimes.
간척지 인근 농경지에서의 비산 및 부유먼지 확산 모니터링(II): 김제 모니터링
황현섭,이인복,신명호,홍세운,서일환,유재인,권경석,김용희,Hwang, Hyun-Seob,Lee, In-Bok,Shin, Myeong-Ho,Hong, Se-Woon,Seo, Il-Hwan,Yoo, Jae-In,Bitog, Jessie.P.,Kwon, Kyeong-Seok,Kim, Yong-Hee 한국농공학회 2009 한국농공학회논문집 Vol.51 No.2
A study on fugitive dusts was conducted at Saemangeum reclaimed land located in Gim-je area. The monitoring result on the fugitive and suspended dust was significantly affected by the farming activities (harvesting and land cultivation) and vehicles passing nearby the measuring points. The concentration of the fugitive dust generated from the reclaimed land was reduced remarkably by the effect of halophyte present on the ground and the tide embankment. Comparing the data collected in 2006 and 2007, the concentrations of TSP and PM10 decreased by 47.4% and 29.5%, respectively. After harvesting operations at paddy field, TSP increased by 22% while PM10 increased by 54%. The concentration of a Cl- which is a representative ion of sea-salt decreased to about 35% in 2007 compared with 2006. This represents that the inside area change and plant covering rate affected on the decrease of fugitive dust. The correlation analysis for the compounds of topsoil at each measuring point shows that near the coastline is more comparable. The canopy of halophyte in the source area also increased which reduced the fugitive dust remarkably. The dust distribution measured by dust spectrometer at the same point shows that most particles are $0.5{\mu}m$ to 2um size but not greater than $5{\mu}m$.
서울시 재정비촉진지구내 환경설계를 통한 범죄예방[CPTED]의 적용방안 실증분석
한형수(Han, Hung–,Sou),유재인(Yoo, Jae–,In),함주영(Ham, Ju–,Yeong) 한국주거환경학회 2009 주거환경(한국주거환경학회논문집) Vol.7 No.2
There is a limit to how prevent the increase of crime as a serious social problem only with depending on the general police force, however the crime prevention system through environmental design should be needed so that it will help prevent and cope with possible crimes by restoring and refining urban spaces harmonized with □modern society. Therefore, environmental design according to introduction "theory of the crime prevention through environmental design (CPTED) " in the case of a new town has been analyzed with various evidences how it has contributed in the crime prevention and the safety which advanced countries get effects with. The analyzing scope and methode is the following of the survey result of living peoples in the mock-dong apartment town which has been built since 1980 that plottage area is over 500,000 ㎡ as an essential condition in order to replot the re-designation of development promoted district, the analyzing problems of it suggests the direction how CPTED contributes to the goal of applications of the CPTED given that it will help prevent and cope with possible crimes.