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주상복합 건물에서 열교환기 적용에 따른 실내공기질 개선 및 에너지 절약효과 분석
김상민(Sangmin Kim),김수영(Sooyoung Kim) 한국생활환경학회 2009 한국생활환경학회지 Vol.16 No.3
This study examines the influence of a heat recovery ventilator (HRV) on energy saving and improvement of indoor air quality (IAQ) in high-rise apartment buildings. Field measurements were performed in actual residential units of apartment complex during summer, and computer simulations were performed using the measurement data and standard weather data in Korea. Results indicate that the HRV was an effective contributor to improving IAQ with necessary ventilation rates and efficient energy savings. Validation between computer simulation and measurement results was acceptable under a lower significance level. Predicted and measured energy consumption for an entire year indicates that HRV effectively contributed to saving energy in winter due to the high temperature difference between outdoor and exhausted air. This study suggests that the HRV would be effectively applied in winter than summer when sensible heat is primarily exchanged in the HRV.
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밀폐계 내부에 존재하는 사각 배열 네 개 원형 실린더의 대각 방향 위치 변화에 의해 발생하는 3차원 자연대류 현상에 관한 연구
김상민(Sangmin Kim),서영민(Young Min Seo),박용갑(Yong Gap Park),박상후(Sang Hu Park),하만영(Man Yeong Ha) 대한기계학회 2021 大韓機械學會論文集B Vol.45 No.10
본 연구에서는 사각 배열을 가지는 네 개의 원형 실린더를 포함하는 3차원 밀폐계 내부의 자연대류 현상에 대한 전산 해석을 수행하였다. 본 연구에서는 유한체적법을 기반으로 밀폐계 내부의 실린더가 가상경계법(immersed boundary method)으로 구현되었다. 본 연구에서 사용된 Rayleigh 수는 10³≤Ra≤10<SUP>6</SUP>이며, Prandtl 수는 Pr=0.7로 고정되었다. 주요 설계 변수는 실린더 사이의 대각 방향 간격으로 εh & εv=0.1 L~0.5 L를 고려하였다. 본 연구에서는 3차원 시뮬레이션 결과를 2차원 해석 결과와 비교 분석하고, 밀폐계 내부에서 발생하는 3차원성에 대해 열유동장 및 열전달 특성을 조사하였다. 본 연구에서 고려한 Ra=10<SUP>5</SUP> 및 10<SUP>6</SUP>의 영역에서 실린더의 간격에 따라 서로 다른 유동 특성이 나타났다. 또한, 동일한 Ra 수를 갖는 영역 대에서 실린더 표면 및 밀폐계 벽면의 열전달 성능은 εh & εv가 증가함에 따라 점차적으로 증가하였다. 결과적으로 네 개의 원형 실린더의 대각 방향 위치에 따라 3차원 밀폐계 내부의 자연대류 열전달 성능이 큰 영향을 받았다. This study conducted direct numerical simulations of the natural convection phenomena in a three-dimensional enclosure containing four circular cylinders. The immersed boundary method is used to capture the virtual wall boundary of the cylinders based on the finite volume method. Rayleigh numbers in the range of 10<SUP>4</SUP> ≤ Ra ≤ 10<SUP>6</SUP> and a Prandtl number of Pr = 0.7 were considered. The main parameters considered are the diagonal positions of four cylinders and the values of εh & εv = 0.1 L~0.5 L. The flow and thermal structures and corresponding heat transfer characteristics were investigated in regard to the flow regime of the unsteady state with the three-dimensionality, and their results were compared with those in 2D simulation. At Ra = 10<SUP>5</SUP> and 10<SUP>6</SUP>, the flow characteristics are different from each other between 2D and 3D simulations. The time- and surface-averaged Nusselt number on the cylinder surface and the enclosure wall increases with increasing value of εh & εv. As a result, the diagonal positions of four cylinders have remarkable influences on the heat transfer characteristics on natural convection inside three-dimensional enclosure.
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The Relationships Between Process and Outcome of Collaborative Community Governance
Sangmin Kim(김상민) 한국도시행정학회 2015 도시 행정 학보 Vol.28 No.3
How collaborative governance works at the community level and what outcomes does this process produce? Through reviewing the literature on community development and collaborative governance, this study develops a model of collaborative community governance as an integrative framework with a set of evaluation criteria to examine emerging collaborative community governance practices in Korea. This model is composed of four components?the cyclical process of collaboration (face-to-face dialogue, social learning, trust building, and commitment to the process), institutional design that affects the collaborative process (broad inclusiveness, equality, process transparency, and ground rules), collaborative capacity (intellectual, social and political capitals) as sociopolitical outcome and perceived effectiveness of collaborative governance. This study then evaluates two representative community-building practices in Korea to examine to what extent factors of the institutional design, leadership, educational programs and governance process influence the outcomes. The path analysis verifies the largest effect of deliberation on physical outcome and the largest effect of social learning on governance evaluation. The results also confirm the strongest influence of social learning on intellectual capital, the strongest influence of trust building on social capital, and the strongest influence of deliberation to political capitals. From these results, it is suggested that making efforts to facilitate face-to-face dialogue, deep deliberation, and social learning during the governance process would be the most effective strategy to produce better outcomes.
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한국영화의 글로벌라이제이션(globalization)에 관한 시론적 연구-박찬욱과 봉준호의 재현전략을 중심으로-
김상민 ( Kim Sangmin ) 국제한국문학문화학회 2021 사이 Vol.31 No.-
칸과 아카데미 영화제에서 <기생충>(2019)이 거둔 전례 없는 수상실적은 한국영화의 급격한 위상변화를 예증하고 있다. <기생충>의 수상은 당시 ‘한국영화 100년’이라는 영화사적 이벤트와 맞물려 ‘한국영화 100년의 쾌거’로 자주 설명되었는데, 이러한 표현 안에는 세계영화의 장(field)으로 나아가려던 한국영화의 욕망과 그간의 노력이 함축되어 있다. 하지만 또 다른 한편으로 이 기념적 서사 안에는 균질하고 실체적인 ‘한국영화’가 일정한 발전과정을 거쳐, 비로소 어떤 성과에 도달했다는 역사주의적 관점이 주로 전제되어 있다는 점에서 재고의 여지가 있다. <기생충>에서는 한국영화의 성장이나 발전과 같은 연속성만이 아니라, 그 내부에 파생된 급진적인 변화나 단절들 역시 분석될 필요가 있기 때문이다. 실제로 1950년대 중반부터 국제영화제를 통해 세계성을 추구하려 했던 한국영화의 재현전략은 시대에 따라 다양한 형태로 변해왔는데, 결정적인 변화는 2000년대 이후 박찬욱과 봉준호의 영화에서부터 관찰된다. 박찬욱과 봉준호는 세계성 추구를 위해, 전통적인 ‘내셔널 시네마’의 틀이나 정체성에 근거한 앞선 세대의 영화 만들기에서 벗어남은 물론 유럽-할리우드 중심주의에도 대항한다. 이들의 영화에서 ‘지역적인 것’은 민족/국민 국가의 하위단위로 종속되지 않고, ‘한국적인 것’에 대한 시각 지표로도 더 이상 기능하지 않는다. 오히려 이 영화들에서는 ‘한국적인 것’은 삭제되거나 새롭게 재구성되는데, 이는 유럽과 할리우드 중심으로 구성된 전지구적 영화체제에서 유럽과 할리우드의 헤게모니에 맞서는 하나의 전략으로 선택된 것이다. 본 연구에서는 이들이 수행하는 다양한 재현전략들을 분석하고, 이를 통해 ‘K-시네마’ 현상에서 주목해야 할 지점들을 살펴본다. The unprecedented award-winnings of Parasite(2019) at Cannes and Academy festivals exemplify the dramatic change in Korean cinema’s status. The award-winnings by Parasite was often described as a ‘successful feat of 100 years of Korean cinema’ in combination with the historical event of ‘100 Years of Korean Cinema’ at the time. These expressions connote the desire and efforts of Korean films to advance into the field of global cinema. However, there is room for reconsideration in this commemorative narrative as it mainly assumes that the homogeneous and substantive ‘Korean cinema’ has finally reached a certain outcome after going through a constant development process in a historical perspective. This is because, regarding Parasite, it is necessary to analyze not only continuous aspects such as the growth and development of Korean cinema, but also the radical changes or disconnections derived from it. In fact, the representation strategy of Korean cinema, which had been seeking to globalize through international film festivals since the mid-1950s, has changed in various forms with time and the most notable change was observed since the 2000s in the films of Park Chan-wook and Bong Joon-ho. Park Chan-wook and Bong Joon-ho, in pursuit of globalization of Korean cinema, not only breaks away from the previous generation’s filmmaking based on the frame or identity of the traditional ‘national cinema’, but also opposes Eurocentric and Hollywood-centered filmmaking. In their films, ‘locality’ is not a notion under the subunit of the nation state, and it no longer functions as a visual index for ‘Things Korean’. Rather, in these films, ‘Things Korean’ is either deleted or reconstructed. This was chosen as a strategy to counter the hegemony of Europe and Hollywood in the global cinema system centered on Europe and Hollywood. This study analyzes the various representation strategies they use and examines the aspects to notice in the ‘KCinema’ phenomenon.
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김상민(Kim, Sangmin),김현호(Kim, Hyeon-ho),하혜수(Ha, Hyue-su) 한국지역개발학회 2016 韓國地域開發學會誌 Vol.28 No.4
The expansion of community-building since the late 2000 seems to be based on the prescriptive approach, which aims to solve the increased local and social problems due to the rapid industrialization and urbanization. In particular, the participation of wide stakeholders and their collaborative efforts through the ‘formation of collaborative governance’ have been emphasized as a key strategy to proceed with diverse community-building activities successfully. Given this significance of collaborative governance approach, this paper examines the Daesungdong Community Project in the city of Paju, especially focusing on how their community building governance has been structured and processed. The case study shows that in those special areas, the role of central and local government was very critical in initiating the community-building project. The national government took a role of network broker or civic enabler, which facilitated the effective mobilization of human and material resources within/beyond the community. In particular, the case demonstrates the transformation of the government-initiated community=building governance to a civic participatory model, where diverse actors in civil society and their collective intelligence made a meaningful contribution.
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