• KSII Transactions on Internet and Information Systems (TIIS)
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• 제17권4호
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• pp.1123-1146
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• 2023

In South Korea, there have been many studies on efficient building-energy management using renewable energy facilities in single zero-energy houses or buildings. However, such management was limited due to spatial and economic problems. To realize a smart zero-energy city, studying efficient energy integration for the entire city, not just for a single house or building, is necessary. Therefore, this study was conducted in the eco-friendly energy town of Chungbuk Innovation City. Chungbuk successfully realized energy independence by converging new and renewable energy facilities for the first time in South Korea. This study analyzes energy data collected from public buildings in that town every minute for a year. We propose a smart city building-energy management model based on the results that combine various renewable energy sources with grid power. Supervised learning can determine when it is best to sell surplus electricity, or unsupervised learning can be used if there is a particular pattern or rule for energy use. However, it is more appropriate to use reinforcement learning to maximize rewards in an environment with numerous variables that change every moment. Therefore, we propose a power distribution algorithm based on reinforcement learning that considers the sales of Energy Storage System power from surplus renewable energy. Finally, we confirm through economic analysis that a 10% saving is possible from this efficiency.

• 농업생명과학연구
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• 제45권3호
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• pp.59-68
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• 2011

한국의 장묘 방법의 대부분은 매장묘지와 납골당묘지로 임야에서 이루어지고 있으며 국토 및 임야의 효율적 이용 면에서 심각한 문제가 대두되고 있다. 매장묘지의 제반 문제를 해결하기 위해서 정부 (산림청), 지방자치단체 (인천광역시), 종교법인 (은회사)에서는 새로운 장묘 방법인 수목장을 조성하여 운영하기 시작하였다. 한국과 일본의 수목장에 대한 의식비교 설문조사 결과에 따르면, 80% 이상이 기존의 매장묘지 및 납골당묘지의 문제점을 인식하고 있었다. 그러나 아직까지 한국은 장묘문화에 대한 제반 문제점이 산적해 있고, 수목장에 대한 전문가가 없는 상태에서 관리 및 운영이 이루어지고 있어 국민들의 기대와 요구에 부응한 기능 발휘를 할 수 없는 상태이다. 이러한 문제점을 해결하기 위해, 환경 친화적인 수목장은 새로운 장묘 문화로의 전환이다. 일본의 이와테켄 이치노세키시에 위치한 지승원(知勝院)의 경우에는 수목장 조성이 지역 정주 환경 개선에 영향을 주었고, 살기 좋은 마을 100선에 선정되어 관광객의 증가는 물론 지역경제소득 창출에도 좋은 영향을 미치고 있다. 본 연구에서는 상주시를 대상으로 사회환경 변화와 산림의 다양한 기능 발휘를 통해 지역 활성화에 기여하고 지역 주민과 공존할 수 있는 지역 상황에 적합한 수목장 조성의 필요성에 대하여 연구하였다.

• 지역연구
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• 제35권3호
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• pp.25-32
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• 2019

도시문제 해결과 함께 4차 산업혁명의 신(新)성장동력 창출을 위해 세계적으로 스마트시티의 전략적 가치가 증대하고 있다. 우리 정부는 2003년 '유비쿼터스 도시(U-City)'를 한국의 고유 스마트시티 브랜드로 도입하여 추진하였다. U-City의 한계 극복을 위해 2018년 백지상태 부지에 4차 산업혁명기술의 테스트베드로서 국가 시범도시(세종 5-1생(生), 부산 EDC; Eco Delta City) 조성을 포함한 「스마트시티 추진전략」이 수립 및 발표되었다. 이후 국내외 변화된 여건과 그간의 정책에 대한 평가를 바탕으로 도시성장단계별(신규-기존-노후) 맞춤형 스마트시티 조성·확산 정책을 제시하고 있다. 스마트시티 조성 및 확산은 혁신 생태계 구축 및 글로벌 이니셔티브 강화를 위한 중장기 로드맵으로 제3차 스마트도시 종합계획('19~'23)을 중점으로 추진되고 있다. 아울러, 정부는 스마트시티 정책을 추진하는 데에는 시민, 민간기업, 지자체 등 다양한 주체가 함께 참여하여 따뜻한 삶의 공간으로 열린 도시이자 포용 도시로서 스마트시티를 조성 및 추진하는 것이 중요할 것으로 판단된다.

• KIEAE Journal
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• 제15권3호
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• pp.83-92
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• 2015

Purpose: The purpose of this study is to propose a methodology for the urban regeneration by constructing contemporary publicness. Beginning with researching on the theoretical fundamentals about publicness and urban regeneration, it introduces the examples to analyze the spatial characteristics of publicness in the contemporary urban architecture, and finally simulates a model for the formation of space through a real work. Method: The study is partially based on the Executive Urban Project, 'Masterplan to make New Taekrigi : Gosan', which was planned in 2013 to suggest a strategic settlement layout for urban regeneration. Making architectural ideas permeated into the model of urban planing, throughout the design process of initially pursued concepts to the design development stage, we could encounter a new type of formation of urban space, coinciding with the historical, cultural ecological contexts. Result: The expected result of the study intends to enhance the relationship between the formation of public space and urban structure, also ultimately to produce a urban system as 'space generator' to fulfill the social needs and its requirements.

• 설비공학논문집
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• 제30권4호
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• pp.167-174
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• 2018

The geothermal heat pump systems were installed for heating and cooling of public buildings in Jincheon Eco-friendly Energy town. The heat pump system was operated at night to save on operational costs, and the cold heat was stored in thermal energy storage (TES). In this study, the performance of geothermal heat pump systems with the TES during the summer season was analyzed, and the operational costs with and without the TES were compared. The electric chiller model was used to simulate a heat pump applied without the TES system. Electric rates of each system were measured to calculate operational costs. When the TES is used in the air conditioning system, the electric load (30.4 MWh) calculated in the daytime can move to off-peak load time, and the operational cost is reduced by 36~54%.

• 한국태양에너지학회 논문집
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• 제37권2호
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• pp.67-75
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• 2017

We have investigated the operating characteristics of $1,600m^2$ large-scale solar thermal system installed in an eco-friendly energy town in Chungbuk Innovation City. The operation criteria of the collecting pump and storage pump were different from the existing standard, and it was confirmed that each pump works well according to the changed criteria. Based on the data of the representative day, the daily collecting heat (efficiency) and the production (storing) heat (efficiency) were estimated. It was confirmed that the daily collecting heat (efficiency) of the flat plate type was higher than that of the evacuated tube type, but the useful heat production was more in evacuated tube type collector.

• 한국주거학회논문집
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• 제19권3호
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• pp.49-58
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• 2008

This study focused on the architectural plan of the pension to meet modem people's desire for rural life, and the result of the study is as follows: First, the architectural plan for the characteristic of the location must apply the various architectural types considering the suburbs, tour and culture town, and community for the location improvement. Second, the architectural plan for the characteristic of the plot requires the encircled space and courtyard between buildings, the private gardens for the rooms, and the consideration of the surrounding environment. Above all, the plan for the subsidiary facilities is the most important. Third, the architectural plan for the characteristic of the plan requires the close connection with the outside, the wide opened view from the guest room, and the individual entrances for the guest rooms. Fourth, the architectural plan for the characteristic of the decorative design must consider the mass separation plan, the application of the facade design factors and eco-friendly environment materials, the night illumination plan, and the space program for the scenic view.

• 자원환경지질
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• 제51권1호
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• pp.67-76
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• 2018

본 연구는 해외 친환경에너지타운에서 보어홀 지중열 저장(BTES) 기술을 활용한 융복합 열에너지 공급 시스템의 3가지 사례로서 캐나다의 ADEU(Alexandra District Energy Utility) 및 DLSC(Drake Landing Solar Community)와 덴마크의 Brædstrup Solpark를 조사하였다. 이들 지역 냉난방 시스템들은 효율과 지속가능성을 높이기 위하여 다중 에너지원을 활용하고 있다. ADEU는 리치몬드시에서 726 개의 지중열교환기로 이루어진 지열필드 및 천연 가스 백업 보일러를 이용한 대규모 지역에너지 공급을 위해 개발되었다. 그리고 캘거리시 인근 Okotoks에 위치한 DLSC는 여름철에 풍부한 태양열 에너지를 144 개의 지중열교환기를 통하여 지중에 저장하고 겨울철 난방을 위해 각 주택에 열에너지를 분배하는 계간축열 방식의 지역난방 시스템이다. Brædstrup Solpark 지역난방 시스템은 태양열, 히트 펌프, 보일러 플랜트 및 계간축열을 위한 48 개의 지중열교환기로 구성되며 다중 에너지원을 이용하여 열을 저장한다. BTES 시추공의 심도와 축열량은 지하수 유동과 지반의 열물성에 따라 영향을 많이 받는다. 이러한 시스템들은 경쟁력 있는 에너지 가격으로 장기적인 에너지를 공급함으로서 신뢰성과 경제성을 평가 받았다. 그리고 ADEU와 Brædstrup Solpark는 서비스 영역 확장을 위한 장기 에너지 공급 계획을 기반으로 확장이 진행중이다. 본 조사를 통하여 이러한 시스템들은 사회 경제적인 이익 뿐만아니라 환경적인 관점이 설계에 반영되어 있는 것을 알 수 있었다. 국내에서도 이러한 프로젝트를 실시하기 위해서는 지방 정부 또는 관련 기관의 에너지 정책 지원 뿐만아니라, 관리 기관 설치를 통한 장기적인 협력이 필요하다.

• Journal of Ecology and Environment
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• 제43권2호
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• pp.202-211
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• 2019

Oceanic islands are biologically important for their unique assemblages of species and high levels of endemism and are sensitive to environmental change because of their isolation and small species source pools. Habitat destruction caused by human landscape development is generally accepted as the main cause of extinction on islands, with exotic species invasion a secondary cause of extinction, especially on tropical islands. However, secondary impacts of human development (e.g., general degradation through resource use and exotic species introduction) are understudied on temperate islands. To determine secondary impacts of human development on the understory vegetation community, 90 field sites on Ulleung Island, South Korea, were sampled during the summer of 2016. Understory vegetation was chosen as it is a proxy for ecosystem health. Diversity and percent cover of introduced, native, and endemic species were tested against proximity to developed areas and trail usage using a model selection approach. Diversity was also tested against percent cover of three naturalized species commonly found in survey plots. The main finding was that distance to development, distance to town, and trail usage have limited negative impacts on the understory vegetation community within best-supported models predicting native and introduced cover and diversity. However, endemic species cover was significantly lower on high usage trails. While there are no apparent locally invasive plant species on the island at the time of this study, percent cover of Robinia pseudoacacia, a naturalized tree species, negatively correlated with plot diversity. These findings indicate that forests on Ulleung Island are not experiencing a noticeable invasion of understory vegetation, and conservation efforts can be best spent preventing future invasions.

• World Technopolis Review
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• 제1권1호
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• pp.56-64
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• 2012

This paper provides a case study to explore the Kitakyushu case as a good referential example on STP development for rejuvenation of declining industrial city. The major data for the case, basically, has been sourced from some materials published by the municipality of Kitakyushu City, the website of the Kitakyushu Science and Research Park (KSRP) etc. The City of Kitakyushu has promoted the KSRP development to overcome industrial decline and stimulate city renaissance as a new industrial city. The core of the development was to develop a high-level education and research environment by gathering several HEIs into one campus. Based on the environment, the Kitakyushu Foundation for the Advancement of Industry and Science and Technology (FAIS) played the critical role as a coupler to make various networks and boost industry-academiaadministration innovation. The KSRP, and then, has been designated as a project area of some cluster projects initiated by the central government. It means that local projects can be synchronized, synergized and synthesized with national projects in the KSRP. In addition, through a series of the environmental approach from the Kitakyushu Eco-town Project to the Low Carbon Society Project, the development of the KSRP is being extended into the region. In the Kitakyushu case, networking is the essence of the KSRP development from the planning stage. First of all, the plan put emphasis on networking of academia for the knowledge creation based on competitive collaboration that is expected as the mainspring of rejuvenating declining industrial area and making a new industrial city that the plan aimed. Then, the roles of two organizations are very important for networking, especially networking of networks: the Campus Management Committee as an interface and the FAIS as a coupler. STP development without some strategic considerations for networking as the way of interaction among its participants cannot be a tool to promote innovation and rejuvenate a declining industrial area. The Kitakyushu case mentioned above explains the matter clearly.