가정용 Video기기의 기술개발 현황과 전망

이해승,Lee, Hae-Seung 한국전자정보통신산업진흥회 1986 電子振興 Vol.6 No.7

쓰레기 매립지 가스포집관에서 유출가스 계측에 관한 연구 1 : 유량계 계측오차의 최소화를 위한 해석

이해승(Hae-Seung Lee),이찬기(Chan-Ki Lee) 강원대학교 환경연구소 1998 環境硏究 Vol.15 No.-

환경성평가를 통한 비위생 매립지 정비방안

이해승(Hae-Seung Lee) 대한환경위생공학회 2008 대한환경위생공학회지 Vol.23 No.3

In this study, we intend to present the uncontrolled landfill maintenance plans by diversely reviewing the operating conditions of landfill and environmental effects and economical issues resulted from the operation of landfill for the purpose of suggesting the optimal maintenance plans applicable to the uncontrolled landfill and unused landfill located in Korea. We perform the basic and precise surveys against three landfill sites showing the biggest problem out of 8 unsanitary landfills sites located in Y County. We compare and review the treatment plans prepared and operated by the N Landfill. The compared and reviewed results show that the local stabilization plan is more effective than the excavation and transfer treatment plan when considering the economic efficiency only. However, the excavation and transfer treatment plan is valid when considering the diverse elements. The G Landfill is operated with separated into living waste landfill section and construction waste landfill section. However, some landfill gas collection bores or holes are installed in its living waste landfill section, which has not been used for about 20 years, as a part of follow-up control. The element causing the environmental damage is considerably reduced in its living waste landfill section. However, the effort to keep the follow-up control through the local stabilization work is required. The landfill is under processing in the construction waste landfill section. However, most of buried wastes are the inorganic wastes such as waste materials and concrete, so the maintenance plan focused on the use of top land by installing the local stabilization facilities is considered as an effective plan. The landfill is under processing in the K Landfill. It seems to be difficult to maintain this landfill through the local stabilization. The excavation and transfer treatment plan to completely remove the potential environmental pollution source. is considered as the valid plan.

친환경적 복구를 위한 비탈면 붕괴원인 분석

이해승 ( Hae-seung Lee ),박병수 ( Byung-soo Park ) 한국환경기술학회 2016 한국환경기술학회지 Vol.17 No.3

본 연구는 실제 붕괴가 발생한 비탈면의 붕괴 원인 규명을 위한 연구이다. 현장조사를 통해 불연속면 특성을 파악하고, 사면 굴착단계를 고려한 한계평행해석을 통하여 안전율의 변화를 알아보았다. 또한, 유한요소해석을 통해 사면내 전단변형률의 발달 경로를 추적하므로써 현장에서 관찰된 인장균열 등과의 연관성을 파악하였다. 한계평형해석결과, 굴착에 의한 응력해방이 비탈면내 전단응력을 증가시키고, 당초 설계조건에서 예측되지 못한 단층 파쇄대가 깊게 형성됨에 따라 비탈면의 전단저항력이 감소되어 비탈면 붕괴원인으로 작용한 것으로 나타났다. 한편, 유한요소해석 결과, 단계별 굴착에 따라 소성변형이 비탈면 하부에서 상부로 확대되었으며 그 위치는 추가활동이 발생한 상부의 인장균열 관측지점을 시점과 유사하였다. This study is for the investigation of really occurred collapse. Characteristics of discontinuity was investigated by field test. Change of safety ratio was investigated by limit equilibrium analysis considering slope excavation steps. Furthermore, correlation with observed tension crack was estimated by trace of development rout of shear deformation rate in the slope using finite element analysis. From the results of limit equilibrium analysis, it was found that the release from stress by excavation can increase the shear stress in slope face. Fault shattered zone decreased the shear resistance of slope face and caused the collapse. By the way, from the results of finite element analysis, plastic deformation was extended from the bottom to the top place of face slope. And the place was similar to the observed place of tension crack.

주파수 영역과 시간 영역의 특성을 고려한 래틀 소음 평가 Process에 대한 연구

이해승(Lee Hae Seung),채창국(Chae Chang Gook) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-

Recently, the interior sound of vehicle is reduced drastically. So the whine. rattie, and pattern noises which were not so important are getting more and more crucial in deciding NVH characteristics and productivity. In traditional method. Rattle sound was rated by subjective evaluation than objective analysis. And we had to spend much time and cost on evaluating the rattle noise. by human ear. Moreover. subjective evaluation may result in error because of human's fatigue. In this research, We modeled rattle index by consider ing characteristics of time and frequency domain and proposed rattle index which was certified by subjective rating.

강원 동해안지역의 생활폐기물 발생특성

이해승(Hae-Seung Lee),최용범(Yog-Bum Choi),김병욱(Byoung-Ug Kim) 대한환경위생공학회 2005 대한환경위생공학회지 Vol.20 No.1

This research was performed to investigate the generation and physico-chemical characteristics of municipal solid wastes in the east coast of gangwon. The results were as follows:<br/> ⅰ) The generation rate of G city and Y gun were 0.187-0.384 ㎏/cap/d and 0.136-0.259 ㎏/cap/d. Apparent density of G city and Y gun were 137.9-191.9 g/L and 157.3-238.3 g/L, respectively. ⅱ) The wastes consisted of 76.1-97.5% of combustibles and 2.5-23.9% of incombustibles in G city. And the wastes consisted of 73.7-98.6% of combustibles and 1.4-26.3% of incombustibles in Y gun. Most of municipal solid wastes are composed of food, paper, and vinyl-plastics waste. Water content of commercial area, agricultural resident, detached resident, apartment area, school zone were 42.5-45.9, 37.6-43.4, 32.4-38.4, 29.3-32.3, 6.8-26.9%, respectively. ⅲ) The low heating value of G city and Y gun were 1,125.5-2,540.7 kcal/㎏, 1,104.4-2,062.3 kcal/㎏, and school and apartment area were higher than commercial area.

대기확산모델 AERMOD에 의한 소각장 주변 대기오염물질 기여도 평가

이해승(Hae-Seung Lee ) 유기성자원학회 2019 유기성자원학회 학술발표대회논문집 Vol.2019 No.춘계

본 연구는 U.S. EPA에서 권장하는 우선모델인 AERMOD(AMS/EPA Regulatory Model)를 예측모델로 선정하여, 소각장에서 배출되는 환경오염물질이 주변 대기환경에 미치는 기여도를 평가하기 위하여 수행되었다. AERMOD는 미국기상학회와 미국환경보호청(EPA)이 공동으로 ISC3 모델의 단점을 보완하기 위해서 개발한 확산모델이다. ISC3 모델에서는 공간적으로 수평연기확산계수(σy) 및 연직연기확산계수(σz)가 일정하다는 가정을 사용하였으나, 실제 대기에서는 고도에 따라 그 값들이 크게 변하는 특성이 있다. 그러나 AERMOD에서는 고도에 따른 연기확산계수 및 풍속의 변화를 대기경계층 상사이론(Similarity theory)을 이용하여 계산해 확산모델에 반영하여 대기 상태가 공간적으로 균일하다는 가정을 보완한 모델이다. 소각장 배출구에서 확산되는 오염물질 항목은 환경정책기본법 중 대기 환경기준적용 항목인 NO2, CO, SO2, PM10과 지정악취물질인 NH3, H2S를 대상 항목으로 설정하였으며, 모델링에 필요한 배출량 입력자료는 기오염물질의 경우 소각장 굴뚝에서 배출되는 농도, 지정악취물질은 자가측정에 따른 배출농도를 적용하였다. 대기오염물질 확산 모사를 위해 연구대상 소각장을 중심으로 반경 2.5 km 영역을모델링 영역으로 설정하였으며, 모델링 격자의 크기는 100 m로 50 × 50개 격자로구성하였다. 대기오염물질 측정지점과 동일 지점을 영향예측지점으로 선정하여, 실제 측정 농도와 모사농도의 차를 이용하여 소각장에서 배출되는 오염물질이 주변지역에 미치는 기여도를 평가하였다.

FCVA 방법에 의한 DLC 박막의 제작에 관한 연구

이해승(Hae-Seung LEE),엄현석(Hyun-Seok UHM),김종국(Jong-Kuk KIM),최병룡(Byoung-Ryong CHOI),박진석(Jin-Seok PARK) 대한전기학회 1997 대한전기학회 학술대회 논문집 Vol.1997 No.7

마이크로채널 열교환기에서 채널 굽힘 각도에 따른 R-134a의 증발열전달 특성에 관한 연구

이해승(Hae-Seung Lee),전둥순(Dong-Soon Jeon),김영률(Young-Lyoul Kim),김선창(Seon-Chang Kim) 대한기계학회 2010 大韓機械學會論文集B Vol.34 No.6

마이크로채널 열교환기에서 채널 굽힘 각도에 따른 R-134a의 증발열전달 특성에 관하여 실험적 연구를 수행하였다. 본 연구에서는 채널의 굽힘 각도가 120°, 150° 및 180°인 마이크로채널 열교환기에서 R-134a의 증발온도와 Reynolds수 변화에 따른 열전달 특성을 대향류 조건에서 실험하였으며, 실험결과 마이크로채널 열교환기에서 증발열전달량과 증발열전달계수는 R-134a의 레이놀즈수 증가에 따라 증가하였다. 또한 채널의 굽힘 각도가 120° 및 150°인 마이크로채널 열교환기는 증발온도 4.9~14.9 ℃에서 채널굽힘 각도가 180°인 마이크로채널 열교환기와 비교하여 평균 약 17.1% 및 13.3%로 증발열전달량이 증가하였으며, R-134a의 증발열전달계수는 채널의 굽힘 각도가 작을수록 증발열전달계수가 증가하는 것으로 나타났다. Experimental investigations have been carried out to examine the evaporative heat transfer characteristics of R-134a with the channel-bending angle (CBA) in microchannel heat exchangers. In this study, we examined the effects of evaporation temperature and Reynolds number of R-134a on the evaporative heat transfer characteristics of R-134a in microchannel heat exchangers with CBAs of 120°, 150°, and 180° under counterflow conditions. Experimental results show that the evaporative heat transfer rate and evaporative heat transfer coefficient increased with an increase in the Reynolds number of R-134a. Further, the evaporative heat transfer rate corresponding to CBAs of 120° and 150° increased to values greater than the evaporative heat transfer rate corresponding to 180° by approximately 17.1% and 13.3%, respectively, for evaporating temperatures in the range 4.9?14.9℃. The evaporative heat transfer coefficient was affected by the channel angle with increasing evaporative heat transfer coefficient at small channel bending angle.

강원 영동지역의 관광철 폐기물 및 발열량 특성

이해승(Hae-Seung Lee),최용범(Yong-Bum Choi) 대한환경위생공학회 2006 대한환경위생공학회지 Vol.21 No.1

When we looked at the seasonal food dregs of the eastern side of gangwondo, gangneung city's summer and winter food dregs showed 25.9 and 25.8% respectively due to the presence of beach areas and ski resorts. Sokcho city showed 28.12% in summer and yangyang gun's summer food dregs showed 40.2%. Yangyang gun's august food dregs showed 2.7 times larger than annual average amount. Outlook density showed regional characteristics. Data showed that food dregs' amount rate has been reduced gradually from 2005 because of the prohibition of direct filling up. As a result of compositions analysis, the eastern side of gangwondo's water fraction of living dregs were lower than that of chuncheon city where is located at the gangwondo's inland area. chuncheon city's data showed residential areas 53.5%, community areas 56.8% and commercial areas 55.6%. These discrepancies caused by the characteristics of dregs discharge type and climate. The caloric value of dregs has been increased incrementally after the ban of food dregs' direct filling up. Therefore, heating value of the dregs exceeds the existing furnace design spec and it can cause high caloric value problems, so we need additional research to solve these problems.