http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
사무소건물의 실내 롤블라인드 설치에 따른 하절기 온열환경 평가
정우람(Jeong Woo-Ram),오명환(Oh Myung Hwan),이광호(Lee Kwang Ho),윤종호(Yoon Jong-Ho) 한국건축친환경설비학회 2012 한국건축친환경설비학회 학술발표대회 논문집 Vol.2012 No.3
The main purpose of shading device in office buildings is the occupant satisfaction in both thermal and visual comfort by preventing the direct solar radiation. Blinds can be roughly divided into roll type and slat type. The interior roll blind is in use at the inside of window in most office buildings. However, the major reason for the interior roll blind negatively affecting the thermal environment is the unreasonable operating situation; the blind is remained closed most of the time without being adjusted by occupants. In this study, the indoor thermal environment is analyzed after the roll blind is installed in the office building during summer season. Specially, the aim of this study is focused on the influence of thermal environment depending on different reflectances of roll blind. The blinds used in the analysis have three different reflectances of 80%, 50% and 20% with the solar transmittance fixed at 10% As a result of the analysis, using the interior roll blind had significant impacts on the PMV, mean radiant temperature, indoor air temperature and so on. The roll blind having the high reflectance can reduce the indoor temperature and can decrease the cooling energy consumption if HVAC system is actually operated during the cooling season.
빛환경 및 건물에너지성능을 통합 고려한 사무소건물용 DSSC BIPV창호 적정 투과율에 관한 연구
정우람(Jeong Woo-Ram),심세라(Sim Se-Ra),윤종호(Yoon Jong-Ho) 한국건축친환경설비학회 2012 한국건축친환경설비학회 논문집 Vol.6 No.3
The main purposes of windows in building are to take the view of the outside and to play the role in decreasing the lighting and heating energy through the daylighting. However, the increase in the energy lighting and cooling consumption is caused by the blind which is unreasonably operated in many curtain wall offices. The blind is closed about 75% of the time without being adjusted by occupants. In this study, the indoor lighting environment was analyzed when adjusting visible transmittance of DSSC BIPV window. Three visible transmittance of 10%, 20% and 30% were chosen for the analysis. The experiment was performed in the curtain-wall office building. Dynamic simulation considering lighting environment and building energy performance was conducted by using EnergyPlus as a software analysis tool. Useful Daylight Illuminance for lighting environment is analyzed both qualitatively and quantitatively as an evaluation index. Building energy performance analysis synthetically considered both DSSC BIPV window and lighting control. As a result, securing the appropriate value of interior illuminance is possible because the low visible transmittance of DSSC BIPV window prevents the introduction of the excessive daylight. DSSC BIPV window is effective for cooling energy reduction in the summer because of low solar heat gain compared to the clear window. Futhermore, energy saving is additionally improved if adjusting lighting control was activated. Consequently, when the DSSC BIPV window that enables the introduction of the suitable daylight is integrated with lighting control system, it further reduce both lighting and cooling energy consumption.
a-Si BIPV창호를 적용한 커튼월 사무소건물의 빛환경 실측 평가
정우람(Jeong, Woo-Ram),안영섭(An, Young-Sub),윤종호(Yoon, Jong-Ho) 한국건축친환경설비학회 2012 한국건축친환경설비학회 학술발표대회 논문집 Vol.2012 No.10
The main purpose of Window in building is taking a view of the outside and then adds subordinately it plays decreasing the lighting and heating energy through Solar Heat Gain from the daylighting. However, the problem that increase the energy consumption of lighting and cooling is incurred because the blind is unreasonably operated in many curtain wall offices; the blind is remained closed most of the time without being adjusted by occupants. Indoor light environment is analyzed when adjusting a-Si BIPV Window that having Visible Transmittance of 7.5% as an alternative about such problems. The experiment is targeted at Full-Scale Building adjusted a-Si BIPV Window. The Daylight Factor through the illuminance measurement is analyzed. In addition, the luminance contrast through luminance measurement between the window and the background is analyzed. As a result of the analysis, securing the appropriate value of daylight factor is possible at the indoor visible environment because the low visible transmittance of a-Si BIPV window prevents inflowing the excessive daylight. At the same time, a-Si BIPV window can make comfortably view outside to the occupants who looking the window. Consequently, when the a-Si BIPV that enables inflowing the suitable daylight is paired with lighting control system it is lowerable that wasted lighting energy consumption becouse of the blind unreasonably operated. Moreover, the appropriate lighting control restrain the heating from the lighting and then it judged that the coolign energy consumption that is the major section of energy spending in the office building will be saving.
정우람(Woo-Ram Jeong),최진규(Jin-Kyu Choe) 한국정보기술학회 2014 한국정보기술학회논문지 Vol.12 No.8
In this paper, we simulate performance of TCP/IP-based iSCSI SAN with host-caching for efficient operation of the iSCSI SAN. For performance analysis of TCP/IP-based iSCSI SAN with host-caching, we simulate read and write operations of networks and model read and write operations for performance analysis. Using various parameter, we simulate and analyze the operations of iSCSI SAN. We simulate effect of changes of transmission distance, transmission rate, processing time for host-caching and storage devices. Simulation results show TCP/IP-based iSCSI SAN improve performance using host-cache and solid-state storage device. The host-caching shows various improvement of performance according to size of requests.
고효율 페로브스카이트 태양전지 광활성층을 위한 가압열처리 방법
이성범 ( Seongbeom Lee ),김단비 ( Danbi Kim ),정우현 ( Woo Hyeon Jeong ),양현석 ( Hyun-seock Yang ),이보람 ( Bo Ram Lee ),최효성 ( Hyosung Choi ),박성흠 ( Sung Heum Park ),손세모 ( Semo Son ) 한국화상학회 2021 한국화상학회지 Vol.27 No.1
페로브스카이트 태양전지는 빠른 속도로 효율 개선이 이루어지며 차세대 친환경 에너지원으로 각광받고 있다. 가공 매개변수의 영향을 강하게 받는 유-무기 혼합 페로브스카이트 태양전지에서 고품질의 광 활성층을 제조하는 것은 매우 중요하다. 본 연구에서는 Methylammonium Lead Iodide(MAPbI<sub>3</sub>) 광활성층 제작 시, 결정화가 이루어지는 열처리 과정에서 압력을 가함으로써 용매가 증발하는 속도를 조절할 수 있는 가압열처리 공정방법(pressure assisted annealing process, PA method)을 개발하였다. 본 연구에서 개발한 광 활성층 제조방법은 보다 오래 용매를 활성층 내에 머물게 할 수 있어서 MAPbI<sub>3</sub>의 중간단계에서 그레인의 성장을 극대화 할 수 있으며, 이를 통해 고품질 페로브스카이트 광 활성층의 제조를 가능하게 한다. 또한 본 가압열처리 방법으로 형성시킨 페로브스카이트 광 활성층을 도입하여 태양전지를 제조하였을 경우, 소자의 최고 성능은 기존의 방법으로 제조된 소자와 비교하여 24.4 mA cm<sup>-2</sup>의 높은 단락 전류밀도, 0.96 V의 개방전압, 0.75의 필 팩터를 나타내며 17.3 %의 에너지 전환효율을 나타내었다. Perovskite solar cells have been rapidly improved in device efficiency and are in the spotlight as a next-generation eco-friendly energy source. Achieving high-quality photo-active layer influenced by processing parameters is critical to the device performance of organic-inorganic hybrid perovskite solar cells. In this study, a pressure assisted annealing process (PA method) was developed to control the evaporation speed of the solvent inside perovskite layer. By applying pressure during the annealing process for crystallization of the methylammonium Lead Iodide (MAPbI<sub>3</sub>), we could control the evaporation speed of solvent to promote crystal growth of MAPbI<sub>3</sub> which enables to manufacture high-quality perovskite photo-active layers. As a result, the PA device exhibited a high PCE of ~17.3 % with significantly enhanced short-circuit current of ~24.4 mA cm<sup>-2</sup>, an open-circuit voltage of 0.96 V and a fill factor of 0.75.