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태양전지 가상구현 장치를 위한 새로운 태양전지 모델링에 관한 연구
이병인(B.I.Lee),류태규(T.G. Ryu),한정만(J.M. Han),최규하(G.H. Choe) 전력전자학회 2002 전력전자학술대회 논문집 Vol.- No.-
A study on photovoltaic system has a lot of problems. Such as repetition expenment in the same condition, development of MPPT (Max-Power Point Tracking) algorithm^[1][2], dev-elopment of Islanding detection algorithm and so forth. The reason IS that solar cell output characteristics are vaned by insolarion and surface temperature of solar cell. Therefore, the assistance equipment is required which emula-tes the solar cell characteristics In this paper, propose the new modeling of solar cell and verify this modeling using MA TLAB simulation, And experiment virtual Implement of solar cell system using this modeling
Porous Calcium Silicate 및 Zeolite가 계분 유해가스 발생에 미치는 영향
전병수,최희철,김태일,권두중,노환국,강희설,김형호,한정대,최롱,박흥석,Jeon, B.S.,Choi, H.C.,Kim T.I.,Kwon, D.J.,Rho, W.G.,Kang, H.S.,Kim, H.H.,Han, J.D.,Choi, L.,Park, H.S. 한국축산환경학회 2001 축산시설환경학회지 Vol.7 No.1
In this experiment porous calcium silicate (PCS) powder prepared by using a 50 mesh sieve was spread on top of chick droppings to investigate the odor from the manure. Zeolite was used as a comparative purpose. Reduction in ammonia production from chick droppings shortly after the PCS and zeolite application was evident (P<0.05), but there were no difference among treatments afterwards. hydrogen sulfide level was significantly lowered by both PCS and zeolite treatment(P<0.05).
CNG 저장용기용 저합금강의 인장 특성에 미치는 고압 수소가스의 영향
이해무(H. M. Lee),정인현(I. H. Jeong),박종서(J. S. Park),남승훈(S. H. Nahm),한정옥(J. O. Han),이영철(Y. C. Lee) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
Natural gas that can be produced from coal or biomass is known as “synthetic natural gas” or “substitute natural gas” (SNG). SNG could be a major driver for energy security. SNG production could diversify energy options and reduce natural gas imports. Also, HCNG (or H₂CNG), a mixture of CNG(compressed natural gas) and 4-9 percent hydrogen by energy, is expected to be used as a fuel gas for internal combustion engines and home appliances due to extremely low emissions and increases in thermal efficiency. However, mechanical properties can be deteriorated by hydrogen contained in SNG or HCNG. It is necessary, therefore, to investigate the effect of hydrogen on the mechanical properties of materials used for the existing natural gas infrastructure so that SNG or HCNG can be transported and distributed safely and reliably. In this study, the effect of highly pressurized hydrogen gas on tensile properties of a low alloy steel used for CNG storage vessels was investigated using so-called hollow tensile specimen technique.
열처리 조건이 이종접합 유기태양전지의 효율에 미치는 영향
김영훈(Y. H. Kim),한상면(S. M. Han),한민구(M. K. Han),이용욱(Y. U. Lee),한정인(J. I. Han) 대한전기학회 2007 대한전기학회 학술대회 논문집 Vol.2007 No.11
열처리 조건이 이종접합 유기태양전지(heterojunction organic photovoltaics)의 power conversion efficiency(PCE)에 미치는 영향에 대해 살펴보았다. 본 연구에서는 열처리 온도와 열처리 시간을 변수로 다양한 조건하에 유기태양전지를 제작하고 AM1.5G 조건에서의 효율 변화를 관찰하였다. 열처리 온도는 90℃, 열처리 시간은 20분에서 가장 우수한 변환효율이 관찰되었다.
CNG 저장용기용 저합금강의 인장 특성에 미치는 고압 수소가스의 영향
이해무(H. M. Lee),정인현(I. H. Jeong),박종서(J. S. Park),남승훈(S. H. Nahm),한정옥(J. O. Han),이영철(Y. C. Lee) 대한기계학회 2012 大韓機械學會論文集A Vol.36 No.8
대체천연가스(SNG)는 에너지 안보 차원에서 에너지 수급 안정화 방안의 하나로 많은 관심을 받고 있다. 또한 HCNG (또는 H₂CNG)는 배기가스 내의 유해 성분을 현저히 줄이고 열효율도 높일 수 있어서 내연기관이나 가정용 연료로 사용될 것으로 기대되고 있다. 그러나 SNG나 HCNG에 포함되어 있는 수소는 재료에 침투하여 그 재료의 역학적 특성을 크게 저하시키는 것으로 알려져 있다. 따라서 SNG나 HCNG를 안전하고 효율적으로 수송ㆍ공급하려면 이를 위해 운용되는 인프라의 안전성과 신뢰성 확보가 선결되어야 한다. 본 연구에서는 중공 시험편을 이용한 인장시험법을 통하여 CNG 저장용기용 저합금강이 나타내는 고압 수소 분위기에서의 인장 특성 변화에 대하여 조사하였다. SNG (synthetic natural gas or substitute natural gas) could contribute greatly toward energy security. In addition, HCNG (or H₂CNG) is expected to be used as a fuel gas for internal combustion engines and home appliances because it has extremely low emissions and high thermal efficiency. However, the hydrogen contained in SNG or HCNG can deteriorate the mechanical properties of the materials used in existing natural gas infrastructure. Therefore, it is necessary to investigate the effect of hydrogen on the mechanical properties of such materials so that SNG or HCNG can be transported and distributed safely and reliably. In this study, the effect of highly pressurized hydrogen gas on the tensile properties of a low-alloy steel used for manufacturing CNG storage vessels was investigated using the so-called hollow tensile specimen technique.
이남호(N.H Lee),이민수(M.S Lee),장병태(B.T Jang),한정열(J.Y Han),송인준(I.J Song),안용호(Y.H An) 한국조명·전기설비학회 2009 한국조명·전기설비학회 학술대회논문집 Vol.2009 No.5월
IEC 61850 based substation automation system is operating with Generic Object Oriented Substation Event message when an IED need to send an important signal to other IEDs or receive the signals from another IED such as trip and interlock. So interoperability of substation automation system may be assured throughout the verification of IED GOOSE. This paper shows a testing contents for GOOSE subscription and publish of IEC 61850 based IED and describes how to analysis the result of GOOSE testing. Now domestic IED completed by GOOSE test of this study are working in KEPCO test field.
최동윤,강희설,곽정훈,최희철,김재환,김태일,박치호,전병수,한정대,Choi, D.Y.,Kang, H.S.,Kwag, J.H.,Choi, H.C.,Kim, J.H.,Kim, T.I.,Park, C.H.,Jeon, B.S.,Han, J.D. 한국축산환경학회 2002 축산시설환경학회지 Vol.8 No.2
This study was carried out to investigate the quantity of Holstein dry cow manure excreted and their characteristics. The results obtained in this study were summarized as follow; The average body weight of the Holstein dry cow during experiment was 619.9kg. The feed intake(DM basis) and water consumption was 10.7, 38.6kg/day/head, repectively. The manure production of Holstein dry cow was 44.8kg/day/head (feces 26.9, urine 17.9kg). The moisture content of feces and urine was 84.5%, 95.3%, respectively. Wastewater pollutant concentration of $BOD_5$(Biochemical Oxygen demand), $COD_{Mn}$ (Chemical Oxygen demand), SS(Suspended Solids), T-N(Total Nitrogen) and T-P(Total Phosphorus), excreted from Holstein dry cow was 16,874,55,763, 87,333, 2,353, $368mg/{\ell}$ in feces and 5,621, 8,673, 518, 2,423, $3mg/{\ell}$ in urine, repectively. The fertilizer content of manure, N(Nitrogen), $P_2O_5$(Phosphoric acid) and $K_2O$(Potassium oxide) was 0.24, 0.08, 0.15% in feces and 0.24, 0.001, 0.30% in urine, respectively.
권순형(S-H Kwon),김영훈(Y-H Kim),김원근(W-K Kim),한정인(J-I Han) 대한전기학회 2007 대한전기학회 학술대회 논문집 Vol.2007 No.11
전계가 있는 밀폐된 공간에서의 대전입자에 작용하는 힘에 대한 수식들을 정의하고 구동 전압을 추출할 수 있는 상관 관계를 살펴보았다. 입자의 크기, 전하량 등 여러 가지 실험적인 factor들을 변화시켜본 결과 구동 전압에 많은 영향을 주는 것으로 나타났다. 특히 구동 전압의 추출을 위해 도입된 여러 가지 factor들은 구동 전압에 독립적으로 작용하는 것이 아니라 서로 복합적인 작용을 하는 것으로 결과가 얻어졌다.