• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 정기총회 및 추계학술대회 논문집
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• pp.3180-3186
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• 2011

A segmented scissors type switch has been developed for the urban transit maglev demonstration line to be commercialized near Incheon International Airport in 2013. Based on the design of the previous segmented 3-way switch, the scissors switch is composed of four segmented 2-way switches up/down and left/right and a turn table in the mid point. The main function of the scissors switch is to change the running direction of the train at end terminals. The developed scissors switch is planned to be installed in front of the 102 station, which has a side platform, of the demonstration line. The total length of the switch is 65m and the distance between the up and down track centerlines is 6m. The 2-way switches and turn table are made of steel box type beams, and have their own driving unit, locking unit, control unit, levitation and propulsion rails, and so on. Installed in the factory, a 100,000-cycle continuous operation test was carried out after manual and automatic test operations. The applicapability of the developed switch was verified through the measurements of the linearity of the track after repetitive operations, the mechanical operation noise, the load of the main driving motor, the safety of the control panel, the natural frequency of the girder, the deformation of the girder, and so on.

• 한국추진공학회지
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• 제15권1호
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• pp.69-75
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• 2011

한국형발사체 엔진에 사용될 예정인 75톤급 연소기 채널냉각형 기술검증시제에 대한 연소시험을 수행하였다. 설비 공급 능력과 구조물 강도 제한으로 정상 유량의 50% 수준에서 시험이 수행되었다. 75톤급 채널냉각 연소기의 저압연소시험을 통해 점화구간과 연소구간에서의 작동성과 안정성이 확인되었다. 더불어 75톤 연소기의 성능요구조건을 만족시킬 수 있을 것으로 추정할 수 있었다.

• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2010년도 제34회 춘계학술대회논문집
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• pp.71-74
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• 2010

한국형발사체 엔진에 사용될 것으로 예상되는 75톤급 연소기의 기술검증시제를 이용하여 2회 연소시험을 수행하였다. 설비 공급 능력과 구조물 강도 제한으로 정상 유량의 50% 수준에서 시험이 수행되었다. 채널냉각 연소기를 이용한 저압연소시험을 통해 점화구간과 연소구간에서의 신뢰도와 안정성이 확인되었다. 더불어 75톤 연소기가 성능요구조건을 만족시킬 수 있을 것으로 추정할 수 있었다.

• 한국추진공학회지
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• 제23권4호
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• pp.104-111
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• 2019

다단연소사이클 엔진은 가스발생기 기반의 개방형 엔진에 비해 성능이 좋기 때문에 현재 한국형발사체사업(KSLV-II)의 후속사업의 일환으로 선행연구가 진행 중이다. 기술검증시제 명칭의 TDM0A, TDM0B를 통해 다단연소사이클 엔진의 시동 조건과 연소 특성을 이해하고, 산화제 과잉 예연소기와 연소기 개발을 위한 연소 성능 시험이 수행되었다. 시험 데이터를 토대로 엔진 형상 모델 TDM1A를 제작하여 연소 시험을 수행했으며, 주연소기 연소압 91 bar, 터보펌프 회전수 28,000 rpm의 안정적인 결과로 개발요구조건을 만족하였다. 본 논문에서는 TDM0A부터 TDM1A까지의 개발과정과 특징에 대해 논하고자 한다.

• 한국태양에너지학회 논문집
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• 제27권4호
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• pp.35-41
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• 2007

To demonstrate the desalination system, the demo-plant was scheduled to be installed. The system was planned to use solar thermal collector as heat source and PV as electricity source. For the design of the desalination demonstration system, firstly the solar thermal system would be well designed from the result between the supplied heat into the fresh water generator and the fresh water yield. The generator for demonstration system was chosen as the fresh water generator of the single stage and effect with plate-type heat exchanger using low pressure evaporation method. The test facility for the tests to reveal the relationship between the fresh water yield and the supplied heat flow rate was designed and manufactured. The maximum fresh water yield of two fresh water generators applied in this study was designed as 1.5 Ton/day. The parameters relating with the performance of fresh water generator are known as sea water inlet temperature, hot water inlet temperature, and hot water flow rate. Through the experiments, this study firstly showed detail operation characteristics of the generator and designed the solar thermal system for the demonstration system.

• 한국초전도ㆍ저온공학회논문지
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• 제12권3호
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• pp.34-38
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• 2010

Until now some countries including South Korea have made big progress and many efforts in the development of high temperature superconductor (HTS) power equipments. Especially, HTS Cable and superconducting fault current limiter (SFCL) are the strongest candidates among them from the viewpoint of applying to real grid. In South Korea, HTS cable and SFCL have been installed in test fields and tested successfully at Gochang PT Center of KEPCO. In order to meet practical requirements and be feasible in real grid, a demonstration project for HTS cable and SFCL systems, called GENI(green superconducting electric power network at Icheon substation) project, has been initiated to install 23kV HTS cable and SFCL systems in a utility network in South Korea since 2008. Namely, it says the first demonstration project for the application HTS system to real smart grid in South Korea. This paper presents the design and the application plan of the 22.9kV HTS cable and SFCL in 154kV Icheon substation in South Korea with the viewpoint of applying in Smat Grid.

• 한국건설순환자원학회논문집
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• 제3권1호
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• pp.72-83
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• 2015

지중 송전선은 전기저항에 의한 발열현상이 늘 있으며, 그 주변의 되메움재를 통하여 열을 방출하게 된다. 따라서, 송전관로의 설계에는 발생하는 열을 주변 지반이 효과적으로 외부에 전달하여, 열적 안정성을 확보하는 것이 매우 중요한 설계 요소가 된다. 본 연구에서는 지중 송전관로 되메움재용 순환골재의 현장 적용성을 향상시키기 위하여, 순환골재의 품질기준 및 시공기준을 제시하고, 현장 실증시험을 통하여 송전관로의 열안정성을 분석하였다. 현장 실증시험에서는 순환골재 두 종류와 현재 되메움재로 사용하고 있는 모래의 열적 거동을 비교하였다. 시험 결과, 순환골재는 시간경과와 관로에서의 이격거리에 따라 온도와 함수비 변화가 모래와 유사하게 나타났다. 따라서 순환골재는 지중 송전관로 되메움재로서 일반 모래를 대체하여 적용 가능할 것으로 판단된다.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2022년도 춘계학술대회
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• pp.207-208
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• 2022

최근 디지털 기술이 발전하면서 조선해양분야에 새롭게 도입되는 도입하는 연구사례가 늘고 있으며 업계에서도 관련 장비 및 서비스가 개발되고 있다. 새로운 장비가 개발되고 출시하기 이전에 우선 검증과정을 거쳐야한다. 조선해양분야에서는 우선 육상에서 시뮬레이션 시험 또는 환경시험을 통해 장비를 검증하고 있다. 하지만 육상시험만 진행하면 실운용환경에서의 검증데이터가 부족하다. 본 논문에서는 실운용 환경에서의 검증을 위한 실증시나리오 개발에 있어 고려할 수 있는 사항에 대해 기술한다.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2008년도 춘계학술대회 논문집
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• pp.479-482
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• 2008

Since late of 2000, KIER has developed a novel pyrolysis process for production of fuel oils from polymer wastes. It could have been possible due to large-scale funding of the Resource Recycling R&D Center. The target was to develop an uncatalyzed, continuous and automatic process producing oils that can be used as a fuel for small-scale industrial boilers. The process development has proceeded in three stages bench-scale unit, pilot plant and demonstration plant. As a result, the demonstration plant having capacity of 3,000 tons/year has been constructed and is currently under test operation for optimization of operation conditions. The process consisted of four parts ; feeding system, cracking reactor, refining system and others. Raw materials were pretreated via shredding and classifying to remove minerals, water, etc. There were 3 kind of products, oils(80%), gas(15%), carbonic residue(5%). The main products i.e. oils were gasoline and diesel. The calorific value of gas has been found to be about 18,000kcal/$m^3$ which is similar to petroleum gas and shows that it could be used as a process fuel. Key technologies adopted in the process are 1) Recirculation of feed for rapid melting and enhancement of fluidity for automatic control of system, 2) Tubular reactor specially-designed for heavy heat flux and prevention of coking, 3)Recirculation of heavy fraction for prevention of wax formation, and 4) continuous removal & re-reaction of sludge for high yield of main product (oil) and minimization of residue. The advantages of the process are full automation, continuous operation, no requirement of catalyst, minimization of coking and sludge problems, maximizing the product(fuel oil) yield and purity, low initial investment and operation costs and environment- friendly process. In this presentation, background of pyrolysis technology development, the details of KIER pyrolysis process flow, key technologies and the performances of the process will be discussed in detail.

• 한국수소및신에너지학회논문집
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• 제23권5호
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• pp.559-571
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• 2012

Dimethyl ether (DME) is a new clean fuel as an environmentally-benign energy resource. DME can be manufactured from various energy sources including natural gas, coal, and biomass. In addition to its environmentally friendly properties, DME has similar characteristics to those of LPG. The aim of this article is to represent the development of new DME process with KOGAS's own technologies. KOGAS has investigated and developed new innovative DME synthesis process from synthesis gas in gaseous phase fixed bed reactor. DME has been traditionally produced by the dehydration of methanol which is produced from syngas, a product of natural gas reforming. This traditional process is thus called the two-step method of preparing DME. However, DME can also be manufactured directly from syngas (single-step). The single-step method needs only one reactor for the synthesis of DME, instead of two for the two-step process. It can also alleviate the thermodynamic limitations associated with the synthesis of methanol, by converting the produced methanol into DME, thereby potentially enhancing the overall conversion of syngas into DME. KOGAS had launched the 10 ton/day DME demonstration plant project in 2004 at Incheon KOGAS LNG terminal. In the mid of 2008, KOGAS had finished the construction of this plant and has successively finished the demonstration plant operation. And since 2008, we have established the basic design of commercial plant which can produce 3,000 ton/day DME.