• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2008년도 추계학술대회 논문집
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• pp.229-234
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• 2008

The new millennium has started with several innovations driven by fast evolution of the technologies in energy sector. A strong impulse towards the diffusion of new economical efficient technologies regulatory incentives related to energy production from renewable source and a small scale building trigeneration and to promotion of more sustainable environmental-friendly generation solutions, the evolution of electricity markets, more and more binding local emission constraints, and the need for improving the security of supply to reduce the energy system vulnerability. The 24 percentage energy quantify of total energy consumption consumes in commercial buildings and residential houses and the 30% portion of total $CO_2$ emissions covers also in the commercial buildings and residential houses sector. To cope with efficiently this energy sinuation in building sector, Building microgrid or building tooling, heating & power(BCHP) system has been interested in recent day due to meeting thermal and electric energy requirements efficiently and with appropriate energy quality. A multi agent system is a collective of intelligent agents that communicate with each other and work cooperatively to achieve common goals. Also, it is to medicate and coordinate communication between Control Areas and Security Coordinators for teal-time control of the BCHP system and the power pid. In this new circumstance, it is very important to integrate the power and energy delivery system and the information system(communication, networks, and intelligent equipment) that controls it. Therefore, development of smart control modules with open communication protocol and seamlessly interchange the data and information between control network and data network including extranet and intranet give a great meanings. We designed and developed the TCP/IP-CAN IED agent modules and ModBus./LonTalk/(TCP/IP) IED agent ones to configure the multi-agent system based smart energy network of commercial buildings and also intelligent algorithms for inverter fault diagnostics which ran be operated in control level or agent level network.

• 한국건설관리학회논문집
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• 제13권6호
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• pp.3-12
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• 2012

최근 민간건축 경기 침체가 거듭되면서 '신축' 시장 대비 비용 절감 효과는 물론, 자원절약 및 환경보호 효과를 거둘 수 있다는 긍정적인 반응과 함께 에너지성능향상형 리모델링 시장의 규모가 확대되고 있다. 서울시의 경우 2008년 시범사업을 시작으로 기존 건물에 대해 '건물에너지이용합리화사업(BRP)'를 추진, 시설개선사업을 통해 에너지 절감 및 이용 효율을 향상시킬 수 있도록 융자지원을 하고 있다. 2012년 보도자료에 따르면 254개소의 민간건축물이 참여, 친환경녹색건축물로 조성됨에 따라 온실가스 4만 1천톤/년을 감축, 석유환산 시 1만4천 TOE의 절감에 해당되어 매년 75억원의 에너지비용 절감효과를 보이고 있다고 한다. 본 연구는 기존 건물의 에너지 효율화 대책으로 리모델링 시 우선적으로 고려해야 할 에너지성능향상 방안 중 건축적 요소인 외피를 연구범위로 설정, 그 방안을 모색하였다. 그리고 해석모델에 적용, 분석함으로써 기존 건물의 에너지 절감효과, 즉 건물의 에너지성능향상 효과를 제시하였다. 연구의 범위가 외피 리모델링만을 고려한 건물의 에너지사용량을 감소시키는 단열보강 등의 목적지향적인 방법일 수 있겠으나, 대부분의 비주거용 업무시설의 경우 임대형이라는 점을 고려하였을 때 건축적 기술만을 적용한 방법의 모색은 실제 리모델링 시 가장 보편적인 기초자료가 될 수 있으므로 연구의 의미가 있다고 할 수 있다.

• 설비공학논문집
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• 제26권9호
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• pp.409-415
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• 2014

Ground-source heat pump (GSHP) systems have become an efficient alternative to conventional cooling and heating methods due to their higher energy efficiency. These systems use the ground as a heat source and the heat sink for cooling mode operation. The purpose of this simulation study is to evaluate the performance of a hypothetical GSHP system in an office building and to assess the energy saving effect against the existing HVAC systems (boiler and turbo chiller). We collected monthly energy consumption data from an actual office building ($32,488m^2$) in Seoul, and created a model to calculate the hourly building loads with EnergyPlus. In addition, we used GLD (Ground Loop Design) V8.0, a GSHP system design and simulation software tool, to evaluate hourly and monthly performance of the GSHP system. The energy consumption for the GSHP system based on the hourly simulation results were estimated to be 582.6 MWh/year for cooling and 593.2 MWh/year for heating, while those for the existing HVAC systems were found to be 674.5 MWh/year and 2,496.4 MWh/year, respectively. The seasonal performance factor (SPF) of the GSHP system was also calculated to be in the range of 3.37~4.28.

• Advances in Energy Research
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• 제1권1호
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• pp.53-78
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• 2013

Methane carbon dioxide reforming (MCDR) is a promising way of utilizing greenhouse gas for hydrogen-rich fuel production. Compared with other types of reactors, Compact Reformers (CRs) are efficient for fuel processing. In a CR, a thin solid plate is placed between two porous catalyst layers to enable efficient heat transfer between the two catalyst layers. In this study, the physical and chemical processes of MCDR in a CR are studied numerically with a 2D numerical model. The model considers the multi-component gas transport and heat transfer in the fuel channel and the porous catalyst layer, and the MCDR reaction kinetics in the catalyst layer. The finite volume method (FVM) is used for discretizing the governing equations. The SIMPLEC algorithm is used to couple the pressure and the velocity. Parametrical simulations are conducted to analyze in detail the effects of various operating/structural parameters on the fuel processing behavior.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2020년도 가을 학술논문 발표대회
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• pp.109-110
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• 2020

In This study, we tried to review an efficient curing method in consideration of safety and constructability among the problems of winter construction. In other words, as a result of the mock-up test, the measured value of carbon monoxide was 0 ppm in the case of an electric hot air fan. Since there is no carbon monoxide, problems such as suffocation are expected to be solved. In terms of temperature characteristics, electric hot air fans exhibited high thermal efficiency performance with a slight difference in upper/lower temperatures compared to the existing ones. In the future, we plan to conduct thermal efficiency evaluation through actual site performance verification. We will propose an efficient curing method through applicability evaluation.

• 대한기계학회논문집B
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• 제36권6호
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• pp.669-674
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• 2012

최근에 준공된 디큐브시티는 사무용, 상업용, 숙박용 및 관람집회용 등 4개의 시설이 공존하는 복합건물이다. 이 건물에는 필요로 하는 전기와 증기, 온수 및 냉수를 공급하기 위해 구역형 에너지공급시스템(Community energy supply system)이 설치되었다. 다양한 건물설비를 효과적으로 운영하기 위해 건물에너지관리시스템(Building energy management system)의 설치를 검토하고 있다. 본 연구에서는 3개의 열병합발전시스템을 비롯하여 7대의 증기보일러, 2대의 중온수보일러와 2대의 흡수식냉동기 및 4대의 터보냉동기 등으로 구성되는 구역형 에너지공급시스템의 최적 운전 및 설계방법을 검토하였다. 결과로서 에너지 수요변화에 따른 구역형 에너지공급시스템의 최적 운전방법과 계절적 운전조건의 변화가 시스템의 경제성에 미치는 영향을 규명하였다. 또 시설별 규모에 따라 결정되는 에너지 수요가 건물 전체의 에너지 소비에 미치는 영향도 분석하였다.

• 설비공학논문집
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• 제22권6호
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• pp.361-368
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• 2010

Due to the insulation and the air-tightness requirement in modern buildings have resulted NBS(New Building Syndrome) and SBS(Sick Building Syndrome) of IAQ problems. Therefore, energy efficient way of solving such IAQ issues are of major concern in these days and building industries. This paper introduces a method to improve thermal performance with a DI(Dynamic Insulation) concept. The characteristic of the dynamic insulation is that the lower U-value as the higher air velocity through the DI in a micro level. A thermal performance monitoring study has been conducted to show the energy impact of porous DI over the static insulation material. The results show that up to 45% could be improved in the case with DI compared to the conventional insulation.

• KIEAE Journal
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• 제10권5호
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• pp.3-12
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• 2010

Sustainable design is getting to be controversial issue in all industries over the world particularly, in architecture as the amount of energy usage in architecture occupies 40%. Therefore, it is essential to make the standard for the sustainable design. In order to construct the sustainable design, firstly it should be considered that sustainable design elements based on natural resources to increase building energy efficiency is established and classified. The method of sustainable design divides into passive design and active design. Passive design method should be examined with active one simultaneously for more efficient usage of energy. Next, the study is followed how the sustainable design elements is adopted in buildings through the comparison of cases study of domestic and oversea. The result of case study shows similar adoption of sustainable design elements between oversea and domestic. However, the difference is shown in the building orientation and shape and the window size and position in Solar energy as well as high performance structure in Heat energy. These elements are the most significant elements in order to reduce energy load. In oversea, sustainable design is generated by architects, a client, and consultants based on the close cooperation in the beginning of early design phase before deciding building shape and envelope while in the domestic field adoption for sustainable design is conducted after deciding building shape and material. In order to design sustainable architecture more study is necessary in early stage for Zero Carbon and reducing building energy load through relation with specialists, a client and architects.

• 한국주거학회논문집
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• 제13권2호
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• pp.1-6
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• 2002

As a result of rapid economic and social change, the number of large-scale builing is expected to increase. In response to the growing increase, It will be a greater demand for up-to-date for heating and cooling, illumination, communication and disaster protection system as well as a sharp rise in overall energy consumption. Gradually the living of apartment building is increasing by growing population. In basic data will be offered for the energy conservation programs, and establishing some standards for the energy consumption in future. By understanding how energy sources are actually utilized in existing apartment houses, we can develop more appropriate strategies to maximize both the efficient use of energy and its conservation.

• 한국지열·수열에너지학회논문집
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• 제17권3호
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• pp.30-40
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• 2021

This paper compares the annual energy performance of four different types of air-conditioning systems in a medium-sized office building. Chiller and boiler, air-cooled VRF, ground-source VRF, and ground-source heat pump systems were selected as the systems to be compared. Specifically, the energy performance of the GSHP system and the ground-source VRF system were compared with each other and also with conventional HVAC systems including the chiller and boiler system and air-cooled VRF system. In order to evaluate and compare the energy performances of four systems for the office building, EnergyPlus, a whole-building energy simulation program, was used. The EnergyPlus simulation results show that both the GSHP and the ground-source VRF systems not only save more energy than the other two systems but also significantly reduce the electric peak demand. These make the GSHP and the VRF systems more desirable energy-efficient HVAC technologies for the utility companies and their clients. It is necessary to analyze the impact of partial load performance of ground-source heat pump and ground-source VRF on the long-term (more than 20 years) performance of ground heat exchangers and entire systems.