• 한국환경과학회지
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• 제21권7호
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• pp.825-835
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• 2012

This study for the development of water purification Artificial floating island maximizing domestic Artificial floating island patent trends and product development, according to the timing of patent registration was analyzed for trends. In addition, domestic invention patent technology Artificial floating island typed according to the purpose and characteristics of domestic patents were Artificial Floating Island. In particular, domestic leisure space with a growing population and the need for securing emerging role as a reservoir of water only in the past, who do appeal as a tourist destination or as an ecological space utilized, and accordingly will transform and the need to secure a hydrophilic, degrade water quality problems using this aquatic environment (water acquisition and hydrophilic), the requirements are a big obstacle is the reality factor. This patented product differentiation strategy through the analysis of the development of technology progressiveness (Field Application) in terms of water quality improvement and maintenance side, and the hydrophilic side scenery, ecological restoration aspects, and applicability to the field and taking into account existing technology economic aspects of distinction were presented and advertised a lot in terms of cost compared to other techniques without the use of highly efficient methodology for building a water purification and also appears identity appeal, wetlands, rivers, etc. can be applied broadly technician widespread deployment and installation time to less simple and more are expected to spread.

• Journal of Advanced Marine Engineering and Technology
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• 제39권10호
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• pp.1062-1067
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• 2015

Floating architecture is a type of building that is geographically located on a sea or a river. It floats under the influence of buoyancy, and does not have an engine for moving it. Korea is a peninsula surrounded by sea except on the north side, so floating architectures have been mainly focused on two points: solving the issue of small territory and providing various leisure & cultural spaces. Floating architectures are expected to save energy effectively, if they use sea water heat, which is known to be clean energy with infinite reserves. To use sea water heat as the heat source and/or heat sink, this study proposes a model in which a sea water heat exchanger is embedded in the concrete structure in the lower part of the floating architecture that is submerged under the sea. Based on the results of performance evaluations of the sea water heat exchanger using CFD (computational fluid dynamics) analysis and mock-up experiments under various conditions, it is found out that the temperature difference between the inlet and outlet of the heat exchanger is in the range of $3.06{\sim}9.57^{\circ}C$, and that the quantity of heat transfer measured is in the range of 3,812~7,180 W. The CFD evaluation results shows a difference of 5% with respect to the results of mock-up experiment.

• 한국BIM학회 논문집
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• 제9권1호
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• pp.22-31
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• 2019

In this paper, we construct a prototype model for city data prediction by using time series data of floating population, and use machine learning to analyze urban data of complex structure. A correlation prediction model was constructed using three of the 10 data (total flow population, male flow population, and Monday flow population), and the result was compared with the actual data. The results of the accuracy were evaluated. The results of this study show that the predicted model of the floating population predicts the correlation between the predicted floating population and the current state of commerce. It is expected that it will help efficient and objective design in the planning stages of architecture, landscape, and urban areas such as tree environment design and layout of trails. Also, it is expected that the dynamic population prediction using multivariate time series data and collected location data will be able to perform integrated simulation with time series data of various fields.

• International Journal of Naval Architecture and Ocean Engineering
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• 제10권1호
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• pp.95-102
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• 2018

This paper proposes a dual lifting and its cooperative control system with two different kinds of floating cranes. The Mega-erection and Giga-erection in the ship building are used to handle heavier and wider blocks and modules as ships and off-shore platforms are enlarged. However, there is no equipment to handle such Tera-blocks. In order to overcome the limit on performance of existing floating cranes, the dual lifting is proposed in this research. In the dual lifting, two floating cranes are well-coordinated to add up the lift capabilities of both cranes without any loss such that virtually a single crane is lifting, maneuvering and unloading. Two main constraints for the dual lifting are as follows: First, two barges of floating cranes should be constrained as a rigid body not to cause a relative motion between two barges and main hooks of the two cranes should be controlled as main hooks of a single crane. In order words, it is necessary to develop the cooperative control of two floating cranes in order to sustain a center of gravity of the module and minimize the tilting angle during the lifting and unloading by the two floating cranes. Two floating cranes are handled as a master-slave system. The master crane is able to gather information about all working conditions and make a decision to control the individual hook speed, which communicates the slave crane by TCP/IP. The developed control system has been embedded in the real floating crane systems and the dual lifting has been demonstrated five times at SHI shipyard in 2015. The moving angles of the lifting module are analyzed and verified to be suitable for hoisting control. It is verified that the dual lifting can be applied for many heavier and wider blocks and modules to shorten the construction time of ships and off-shore platforms.

• 한국항해항만학회지
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• 제36권3호
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• pp.215-223
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• 2012

플로팅 함체의 강성변화가 상부 철골모멘트연성골조에 미치는 영향을 확인하기 위해 함체의 높이를 1.5m, 2.0m, 2.5m로 변화시키면서 파랑하중 3초에서 15초에 대하여 동적 유체 해석과 그에 따른 파력을 산정하고 정적 구조 해석을 수행하였다. 해석결과, RAO-피치와 상부 골조의 모멘트 증가량이 선형적인 관계이고 함체의 곡률이 구조물의 강성과 반비례함을 확인하였다. 이러한 선형적 결과를 종합하여, 임의의 함체에 대한 상부골조의 해석 결과를 이용하여 함체 높이가 다른 경우에도 상부 골조의 모멘트를 추정하는 절차를 제안하였으며, 추정결과가 해석결과와 상당히 잘 일치함을 확인하였다.

• 상하수도학회지
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• 제32권6호
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• pp.487-497
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• 2018

Water quality improvement processes for stagnant area consist mainly of technologies applying vegetation and artificial water circulation, and these existing technologies have some limits to handle pollution loads effectively. To improve the purification efficiency, eco-friendly technologies should be developed that can reinforce self-purification functions. In this study, a multi-functional floating island combined with physical chemical biological functions ((1) flotation and oxidization using microbubbles, (2) vegetation purification and (3) bio-filtration with improved adsorption capacity) has been developed and basic experiments were performed to determine the optimal combination conditions for each unit process. It has been shown that it is desirable to operate the microbubble unit process under conditions greater than $3.5kgf/cm^2$. In vegetation purification unit process, Yellow Iris (Iris pseudacorus) was suggested to be suitable considering water quality, landscape improvement and maintenance. When granular red-mud was applied to the bio-filtration unit process, it was found that T-P removal efficiency was good and its value was also stable for various linear velocity conditions. The appropriate thickness of filter media was suggested between 30 and 45 cm. In this study, the optimal design and operating parameters of the multi-functional floating island have been presented based on the results of the basic experiments of each unit process.

• 한국항해항만학회지
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• 제32권1호
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• pp.1-7
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• 2008

최근 중국의 경제 활성화에 힘입어 물동량이 급증하게 되었고, 따라서 선박의 폭발적인 요구도 생기게 되었다. 그러나 조선소의 건조 능력은 드라이도크의 용량에 의하여 크게 의존할 수밖에 없는 실정이다. 드라이도크의 건조는 상당히 긴 기간을 필요로 하고, 또 건조 비용도 많이 들기 때문에 장기적인 조선의 수요의 관점에서 타당성을 검토할 필요가 있다. 더욱 시급한 것은 당장 목전에 와 있는 조선 수요를 적절히 감당해 주어야 한다는 점이다. 그래서 여러 조선소에서는 드라이도크의 부족을 메우기 위한 다양한 방안들이 검토되었다. 현대중공업에서는 육상 건조법을 도입하였고, 삼성중공업과 STX 조선소에서는 플로팅도크에서 건조하는 방법을 도입하였다. 본 논문은 육상에서 건조한 대블록을 플로팅도크에 밀어 넣는 Skid Launching System(SLS)을 위한 도크 제어 시뮬레이터를 개발하여 모의 조정한 결과를 보인다. 대형 블록을 플로팅도크에 밀어 넣기 전에 발라스트 순서도를 작성하여 모의 작업을 통하여 안정성을 확인한 뒤 실제 작업 시 이 순서대로 작업을 하여 플로팅도크의 안전성을 확보하기 위한 장치를 개발한 것이다.

• 한국항해항만학회지
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• 제36권3호
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• pp.189-196
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• 2012

최근의 몇몇 사례를 통해 국내에서도 플로팅 건축물의 확산 가능성에 대한 논의가 시작되고 있으나 국내에서는 아직 플로팅 건축계획과 관련되어 참고할 만한 가이드라인이나 규정이 제정된 바가 없다. 이 연구는 플로팅 건축물 상부시설에 대한 계획 지침을 구성하는 것을 목표로 하였다. 기존 국내외 지침 중 플로팅 건축물 상부시설 계획에 참조가 될 수 있는 지침을 선택하고 관련 구성 항목 및 구성 체계에 대하여 분석하였다. 이를 통해 이 연구와 직접적으로 연관된 지침 구성 항목을 추출할 수 있었다. 이렇게 추출된 항목을 유사한 내용을 중심으로 분류하여 몇 가지의 범주로 구분하고 각각의 내용을 비교 분석하였다. 이상과 같이 분석된 지침 구성 항목과 체계, 그 내용을 토대로 플로팅 건축물 상부시설에 대한 계획 지침 구성 체계를 제안하였고, 구성 항목 및 주된 규정 내용을 검토하였다.

• 한국산학기술학회논문지
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• 제14권9호
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• pp.4447-4454
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• 2013

2011년 10월 국내 최초로 다목적댐 저수지에 100kW급 수상태양광발전 상용화 실증 플랜트가 합천댐에 설치되었다. 수상태양광발전 설비는 육상에 설치하는 태양광발전 설비와는 달리 수상부유체, 계류장치, 수중케이블 등 설치에 많은 어려움이 있다. 특히 수상이라는 환경적 제약으로 인해 육상 태양광 시공 방법으로 공정 관리를 할 수 없는 많은 변수가 속출한다. 수상태양광발전의 구조체는 수상태양광 모듈 및 기타 전기설비를 수상에 부상시키기 위한 설비로서 바람이나 태풍 등 기상환경에 견뎌야 하고 수질에 악영향을 미치지 말아야하며 시공성, 경제성 등 종합적인 고려가 필요하다. 본 논문에서는 100kW 수상태양광 시공사례를 바탕으로 수상태양광의 구조체, 계류장치, 수중케이블, 전력설비 및 원격감시제어시스템의 시공기술에 대한 기초자료를 제공하였다. 본 연구에서 시공된 100kW 수상태양광은 현재 평균 설비이용률 15%로 운영중에 있다.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 1993년도 가을 학술발표회 논문집
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• pp.57-62
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• 1993

Settlements of maximum 23cm have occurred in and Apartment building consturcted on a fill layer with pile foundations. The main reason of the settlements was due to the negative skin friction applied to the pile, and settlement of adjacent ground since most pile tips are acted as a floating foundation founded on the stratum where the SPT N value was mostly less than 30. To underpin this building, the Jumbo Special Pile grouging was adopted, and instrumented data showed little differential settlement after the JSP underpinning.