• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2019년도 춘계 학술논문 발표대회
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• pp.165-166
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• 2019

Curtain wall means a non-bearing wall that forms the outer walls of a building to divide the exterior and interior space. The increased use of curtain walls is diverse, including structural safety, watertightness, and wind pressure. As the government's energy conservation policy and the aim of zero-energy houses, the importance of heat reduction is also greatly increased. So, the study of monotony is constantly being conducted. Thus, in this study, insulation performance was analyzed through simulation according to the shape of curtain wall and the shape of insulation inside, and the purpose of this study was to provide basic data on the application of insulation criteria by energy saving design of buildings.

• Architectural research
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• 제17권3호
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• pp.109-115
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• 2015

The dynamic pricing of electricity, where the electricity rate increases in a time zone with a high demand for electricity is typically applied to a building whose power reception capacity is greater than a certain size. This includes the time of use(TOU) electricity pricing in Korea which can induce the effect of reducing the power demand of a building. Meanwhile, a VRF (Variable Refrigerant Flow) system that uses electricity is regarded as one of the typical heating and cooling systems along with central air conditioning (central HVAC) for its easy operation and application to the building. Thus, to reduce power energy and operating costs of a building in which the TOU and VRF systems are applied simultaneously, we suggested a control for changing the indoor temperature setting within the thermal comfort range or limiting the rotational speed of an inverter compressor. In this study, to describe the features of the above-mentioned control and verify its effects, we evaluated the results obtained from the analysis of its operation data. Through the actual measurements in winter operations for 73 days since mid- December 2014, we confirmed a reduction of 10.9% in power energy consumption and 12.2% in operating costs by the new control. Also, a reduction of 13.3% in power energy consumption was identified through a regression analysis.

• ETRI Journal
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• 제38권4호
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• pp.735-745
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• 2016

The Paris agreement at the 21st Conference of the Parties (COP21) emphasizes the reduction of greenhouse gas emissions and increase in energy consumption in all areas. Thus, an important aspect is energy saving in buildings where the lighting is a major component of the electrical energy consumption. This paper proposes a building energy management system employing visible light communication (VLC) based on LED lighting. The proposed management system has key characteristics including personalization and localization by utilizing such VLC advantages as secure communication through light and location-information transmission. Considering the efficient implementation of an energy-consumption adjustment using LED luminaires, this paper adopts variable pulse position modulation (VPPM) as a VLC modulation scheme with simple controllability of the dimming level that is capable of providing a full dimming range. This paper analyzes the VPPM performances according to variable dimming for several schemes, and proposes a VPPM demodulation architecture based on dimming-factor acquisition, which can obtain an improved performance compared to a 2PPM-based scheme. In addition, the effect of a dimming-factor acquisition error is analyzed, and a frame format for minimizing this error effect is proposed.

• 교육녹색환경연구
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• 제13권1호
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• pp.41-49
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• 2014

Currently G-SEED certification standards was in an effort to building energy-saving and carbon emissions reduction. In this study, focusing on school facilities to suggest an alternative improve green building certification standards through data analysis and conduct an expert Delphi survey. In this study, evaluation of the existing areas of green building certification 7-5 suggest that one out. There are five proposed areas of ecology, health, function, energy and resources. Further it can add areas of economics and $LCCO_2$. Through the assessment items of foreign certification standards evaluated to the feasibility of introducing in Korea. Furthermore taking into account the characteristics of each class, kindergarten, elementary, primary, middle and high schools, College or University were broken down by purpose.

• 설비공학논문집
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• 제23권5호
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• pp.334-341
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• 2011

In the present study, optimal heat supply algorithm which minimize the heat loss through the distribution pipe line in group energy apartment was developed. Variation of heating load of group energy apartment building in accord with the outdoor air temperature was predicted by the heating load-outdoor temperature correlation. Supply water temperature and mass flow rate were controlled to minimize the heat loss through distribution pipe line. District heating apartment building located in Hwaseong city, which has 1,473 households, was selected as the object building for testing the present heat supply a1gorithm. Compared to the previous heat supply system, 10.4% heat loss reduction can be accomplished by employing the present method.

• 한국태양에너지학회:학술대회논문집
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• 한국태양에너지학회 2009년도 추계학술발표대회 논문집
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• pp.361-366
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• 2009

Amid the crisis of global climate change, interest in low carbon and energy-saving building has been increasingly growing. Korea is likely to be designated as one of the countries subject to CO2 reduction under the 'Post-2012 Climate System' The efforts to minimize the building energy has been made and in line with the increasing need of low carbon and eco-friendly building, a demand for building evaluation programs has been on the rise. However, the metro logical data which is necessary for such program has not been effectively provided and moreover, the source, calculation method and period remain uncertain. This study was intended to evaluate the regional typical metro logical data (ISO TRY) provided by Korean Solar Energy Society and compile the month of test reference years (TRY), and analyze the regional weather using dry-bulb temperature, wet-bulb temperature and solar irradiance which are regarded the representative metro logical data.

• 한국건축시공학회지
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• 제15권1호
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• pp.99-105
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• 2015

건축물은 전세계 총 에너지 소비 및 온실가스 방출의 1/3 이상을 차지하고 있어 건축물이 환경에 미치는 영향이 크다. 이에 따라 각 국가에서는 1997년 교토의정서에 의해 온실가스 배출량을 감축할 것을 의무화하였으며, 한국도 2014년 건축물 에너지 성능개선 방안을 발표한 바 있다. 본 연구는 에너지 절감이 가능한 친환경 건축물 기술분야의 주요 핵심기술을 소분류로 분류한 후, 한국, 미국, 일본 그리고 유럽에 공개된 특허문헌에 대한 특허동향분석을 수행하였다. 본 연구의 목적은 주로 친환경 건축물의 인증제도 그 자체에만 머무르고 있어서 세부적인 기술현황이나 연구개발방향을 정확하게 설정하지 못한다는 현재 기술의 문제점을 해결함으로써, 향후의 체계적인 R&D 방향제시 및 기술개발방향을 제시하는 것이다.

• 한국주거학회논문집
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• 제26권5호
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• pp.89-96
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• 2015

This project was conducted as part of the Building America program that proposed the overall mission to achieve 30-50% reduction in existing building energy use. The purposes of this project were to analyze architectural styles and features named as archetypes of existing homes within the Great Lakes regions that include Michigan and identify the dominant type that would offer significant potential for energy-efficient retrofit. Housing archetypes were analyzed according to vintage, style, and construction characteristics in two target cities within the region. The findings from an intensive case study targeting the City of Ann Arbor established a fundamental framework for characterizing local housing archetypes and determined the dominant housing archetype that needed energy-efficient retrofit. An extended case study then conducted in Grand Rapids additionally refined this framework for the future application. This paper explained the process and data collection method to develop the framework that can be utilized by other researchers to determine the target housing types for energy-retrofit research.

• Earthquakes and Structures
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• 제18권1호
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• pp.15-25
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• 2020

The seismic behaviour of reinforced concrete (RC) columns made from high-strength materials was investigated experimentally. Six high-strength concrete specimen columns (1:4 scale), which included three with high-strength stirrups (HSSs) and three with normal-strength stirrups (NSSs), were tested under a combination of high axial and reversed cyclic loads. The effects of stirrup strength and the ratio of transverse reinforcement on the cracking patterns, hysteretic response, strength, stiffness, ductility, energy dissipation and strain of transverse reinforcement were studied. The results indicate that good seismic behaviour of an RC column subjected to high axial compression can be obtained by using a well-shaped stirrup. Stirrup strength had little effect on the lateral bearing capacity. However, the ductility was significantly modified by improving the stirrup strength. When loaded with a large lateral displacement, the strength reduction of NSS specimens was more severe than that of those with HSSs, and increasing the stirrup strength had little effect on the stiffness reduction. The ductility and energy dissipation of specimens with HSSs were superior to those with NSSs. When the ultimate displacement was reached, the core concrete could be effectively restrained by HSSs.

• Journal of Construction Engineering and Project Management
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• 제5권4호
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• pp.12-15
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• 2015

Size of building has a direct relationship with building cost, energy use and space maintenance cost. Therefore, minimizing building size during a project development is of paramount importance against such wastes. However, incautious reduction of building size may result in crowded space, and therefore harms the functionality despite the fact that building is supposed to satisfactorily support users' activity. A well-balanced design solution is, therefore, needed at an optimum level that minimizes building size in tandem with providing sufficient space to maintain functionality. For such design, architects and engineers need to be informed accurate and reliable space-use information. We present in this paper a conceptual framework of an agent-based space-use prediction simulation system that provides individual level space-use information over time in a building in consideration of project specific user information and activity schedules, space preference, ad beavioural rules. The information will accordingly assist architects and engineers to optimize space of the building as appropriate.