http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
CFD 해석을 통한 하이브리드 공조시스템의 인체 온열감의 불균일성에 관한 연구
남유진(Yujin Nam),성민기(Minki Sung),송두삼(Doosam Song) 대한설비공학회 2011 설비공학 논문집 Vol.23 No.3
Recently, hybrid air-conditioning system has been proposed and applied to achieve building energy saving. One example is a system combining radiation panel with natural windinduced cross-ventilation. However, few research works have been conducted on the non-uniformity of thermal comfort in such hybrid air-conditioning system. In this paper, both thermal environment and non-uniform thermal comfort of human thermal model under various air-conditioning system, including hybrid system, were evaluated in a typical office room using coupled simulation of computation fluid dynamics, radiation model and a human thermal model. The non-uniformity of thermal comfort was evaluated from the deviation of surface temperature of human thermal model. Flow fields and temperature distribution in each case were represented.
<지금 바로>의 ‘금세’와 <짧은 시간>의 ‘금새’를 구분함에 대하여
남유진 ( Nam You-jin ),최호철 ( Choe Ho-chol ) 한국어의미학회 2023 한국어 의미학 Vol.80 No.-
Korean Semantics 80. This study argues that the notation of ‘금세’, which is currently established in the standard language, should be changed to ‘금새’. The word ‘금세’ is interpreted differently in two dictionaries nowadays. One dictionary provides the interpretation of ‘금세’ as < just now > considering its formation process, while the other interprets it as < a short time > considering the context in which it is used. However, considering that < just now > refers to a point in time while < a short time > refers to a duration or interval, and that they are clearly distinguished based on this distinction, it is necessary to question whether these meanings both belong to the same word. Based on this awareness of the issue, this study examines historical corpora. Specifically, it focuses on whether there have been semantic changes in the formation process of ‘금세’ and whether the meanings are those of different words. Through this, it was confirmed that ‘금새’ with the meaning of < a short time > existed in the first half of the 20th century, it was found that this word coexisted and eventually disappeared in favor of ‘금세’ due to the standardization of the language. This paper argues that in order to clearly differentiate ‘금새’ with the meaning of < a short time > from ‘금세’ with the meaning of < just now >, it is necessary to use ‘금새’ which effectively conveys the meaning of < a short time >.
지열 시스템의 도입이 지중온도환경에 미치는 영향에 대한 해석적 검토
남유진(Yujin Nam) 대한설비공학회 2013 설비공학 논문집 Vol.25 No.8
Ground heat pump systems utilize the annually stable underground temperature to supply heat for space heating and cooling. The underground temperature affects not only the underground ecosystem, but also the performance of these systems. However, in spite of the widespread use of these systems, there have been few researches on the effect of the systems on underground temperature. In this research, case studies with numerical simulation have been conducted, in order to estimate the effect of ground heat pump systems on underground temperature. The simulation was coupled with the ground water-ground heat transfer model and the ground surface heat transfer model. In the result, it was found that the underground change depends on the heat transfer from the ground surface, the heat exchange rate, and the heat conductivity of soil.
공기 및 지열 이용 Dual-Source 히트펌프 시스템의 성능실험 및 경제성 분석
남유진(Yujin Nam),채호병(Ho-Byung Chae) 대한설비공학회 2014 설비공학 논문집 Vol.26 No.5
Recently, the use of renewable energy has been increased due to growing concern on the energy-saving at buildings and the reduction of CO2 emission. In the field of architecture, to reduce the energy consumption of heating, cooling and hot water supply, heat pump systems with renewable energy has been developed and used in various applications. However, there have been many of researches on the large-scale commercial heat pump systems, but the research and the field application of a compact heat pump system is rare. Therefore, in order to develop the compact heat pump for the small-scale residential building, this study conducted the performance test and feasibility study for a hybrid heat pump using the heat source of air, solar and ground. In the results of experiments through a trial product, the average COP of cooling mode with ground heat source was 4.75, and it of heating mode was 4.03. Furthermore, the average COP of cooling mode with air heat source was 2.60, and it of heating mode was 2.92. Finally, payback period of the system was calculated as 9.2 years.