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Research Article
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Development of Energy Benchmark Model and Confirmation of Performance of Domestic Senior Welfare Facilities
국내 노인복지시설의 에너지 벤치마크 모델 개발 및 성능 확인
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Zo, Chung-Hoon, Yun, Geun-Young
조정훈, 윤근영
- Recently, research is being conducted from various perspectives at home and abroad to reduce greenhouse gases, a major problem of global warming …
- Recently, research is being conducted from various perspectives at home and abroad to reduce greenhouse gases, a major problem of global warming and climate change. One of the main causes of greenhouse gases is the energy used in buildings. There are various tools for diagnosing such energy usage, and this study proposes a method for diagnosing the energy usage level of a building using an energy benchmarking model. This energy benchmarking model diagnoses the level of a building using an energy usage database that integrates the electrical energy and gas energy used in the building after converting them into primary energy, and a quantile regression model based on LightGBM (one of the gradient boosting techniques). do. In this study, we used building property information, energy consumption, and meteorological data from 13,006 buildings for which data was pre-processed for senior welfare facilities (senior homes, nursing homes, etc.) located in Korea. This model derives highly user-accessible estimates of building energy performance, facilitating comparison of energy use between the diagnosed building and similar buildings. This model is considered to be a useful reference when reducing building energy use and planning environmentally friendly buildings in the future. - COLLAPSE
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Development of Energy Benchmark Model and Confirmation of Performance of Domestic Senior Welfare Facilities
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Research Article
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The Effect of the Assessment of the Test Report of Opening Element on the Evaluation of Energy Performance of Green Remodeling
개구부 요소의 시험성적서 반영 여부가 그린리모델링의 에너지 성능 평가에 미치는 영향
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Kang, Chan-Hyeok, Park, Chang-Young, Kwon, Young-Cheol, Choi, Chang-Ho
강찬혁, 박창영, 권영철, 최창호
- South Korea is committed to reducing greenhouse gas emissions in the building sector, setting the target of reducing CO2 by 41.9 …
- South Korea is committed to reducing greenhouse gas emissions in the building sector, setting the target of reducing CO2 by 41.9 million tons by 2030. This is in line with the Paris Agreement and the 2050 Carbon Neutral Scenario. This ambitious goal emphasizes the need to enhance energy performance in buildings, particularly through green remodeling of aging structures. Therefore, this study investigates how the inclusion of test reports for windows and doors affects the energy performance evaluation of these remodeled buildings. Utilizing the ECO2-OD simulation tool, this study analyzed 15 buildings in the Gangwon region to observe the differences in energy savings when test reports are included versus when they are not. The study findings reveal that including test reports results in significant reductions in energy demand (with a decrease of 62.7 kWh/m²·yr), primary energy requirement (with a decrease of 64.4 kWh/m²·yr), and greenhouse gas emissions (with a decrease of 9,553 kgCO2eq). These results highlight the crucial role that accurate data from test reports play in optimizing energy performance evaluations. By demonstrating the significant energy savings achieved through the inclusion of these reports, this study advocates for the mandatory submission of test reports in green remodeling processes. This approach not only ensures more precise evaluations but also assists in more effectively meeting national targets for greenhouse gas reduction. - COLLAPSE
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The Effect of the Assessment of the Test Report of Opening Element on the Evaluation of Energy Performance of Green Remodeling
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Research Article
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Evaluation of the Energy Performance of the Multi-use Facilities by Reinforcing Insulation Level
단열성능 강화를 통한 다중이용시설물의 에너지 성능 평가
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Kim, Hyun Bae, Yoshioka, Takuyuki
김현배, 요시오카타쿠유키
- This study was conducted to meet both environmental and personal interests by strengthening the insulation performance of multi-use facilities, increasing energy efficiency. …
- This study was conducted to meet both environmental and personal interests by strengthening the insulation performance of multi-use facilities, increasing energy efficiency. The target building is a reinforced concrete structure completed in 2011, and the ECO2-OD program was used to analyze changes in primary energy consumption according to the thickness of the insulation materials on the exterior walls, roof, and floor. As a result of the simulation, the walls needed to add more than 30 mm of insulation to meet the current legal standards, the roof needed at least 20mm of insulation, and the floor needed at least 60 mm of insulation. However, when insulation material exceeding a certain thickness is added to walls, roofs, and floors, their efficiency tends to drop significantly. Through the linear regression trend equation of primary energy usage according to insulation performance (thickness), the optimal insulation performance can be referenced when designing the building envelope, and the optimal design considering economics and constructability can be found. Through this, the insulation performance of multi-use facilities can be optimized to reduce energy consumption. - COLLAPSE
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Evaluation of the Energy Performance of the Multi-use Facilities by Reinforcing Insulation Level
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Research Article
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Development of Monitoring Technology for Energy Performance Evaluation of Factory Equipment
공장 설비에 대한 에너지 성능 평가를 위한 모니터링 기술 개발
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Kim, Hyun Bae, Yoshioka, Takuyuki
김현배, 요시오카타쿠유키
- According to the International Energy Agency (IEA), the industrial sector accounted for a quarter of global carbon emissions in 2022. To save …
- According to the International Energy Agency (IEA), the industrial sector accounted for a quarter of global carbon emissions in 2022. To save energy and reduce carbon emissions, it is necessary to introduce factory technology that increases energy efficiency. As a first step in establishing an energy management system for factory facilities, this study aims to reduce energy consumption through monitoring of internal facility systems. As a result of analyzing the temperature and heat flow changes before and after the installation of insulation in a heating furnace at a heavy equipment parts manufacturing plant, the surface temperature decreased by up to 31.0℃ and the heat flow amount decreased by up to 70.9% after installing the insulation. The average daily heat loss was reduced by 45.6%, and the insulation effect was particularly significant at the product exit area. It was confirmed that uniform insulation installation throughout the heating furnace was necessary. By adding insulation and analyzing its effects, it was confirmed that heat loss was reduced by at least 40% and energy efficiency was improved by more than 30%. These technological developments can contribute to carbon neutrality at the national level. - COLLAPSE
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Development of Monitoring Technology for Energy Performance Evaluation of Factory Equipment
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Research Article
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Analysis of Energy Performance Evaluation Tools for Zero Energy Building Certification of Wooden Structure Building
목조건축물의 제로에너지건축물 인증을 위한 국내외 에너지 성능 평가 프로그램 분석
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Kang, Yujin, Park, Ji Hun, Kim, Sumin
강유진, 박지훈, 김수민
- The global push for carbon neutrality has increased the adoption of zero energy buildings (ZEBs) and timber construction. In South Korea, the …
- The global push for carbon neutrality has increased the adoption of zero energy buildings (ZEBs) and timber construction. In South Korea, the ECO2 program is crucial for assessing energy efficiency and certifying ZEBs to meet the 2050 carbon neutrality targets. However, wooden structure buildings face challenges under existing standards. The ECO2 program struggles with accurately calculating thermal transmittance (U-value), measuring airtightness, and using timber-specific material databases. This study highlights the need for specialized tools to evaluate timber buildings with unique elements like studs and rafters. Tools like Energy#, PHPP, and CASBEE offer more detailed assessments. To improve accuracy, ECO2 needs enhancement or integration of alternative tools, along with developing comprehensive timber material databases and refined assessment methods. - COLLAPSE
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Analysis of Energy Performance Evaluation Tools for Zero Energy Building Certification of Wooden Structure Building
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Research Article
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Analysis of Lighting Energy Reduction Effect according to Natural Lighting Influence Factors Based on EN 15193 Algorithm
EN 15193 알고리즘 기반 자연채광 영향 인자에 따른 조명에너지소요량 절감 효과 분석
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Shim, So-Hee, Lim, Su-Hyun, Park, Sung-Jung
심소희, 임수현, 박성중
- Currently, systems that uses natural lighting to replace lighting is being developed, and energy calculations that take this into account is necessary …
- Currently, systems that uses natural lighting to replace lighting is being developed, and energy calculations that take this into account is necessary to analyze effect. However, the energy analysis program ECO2, which is used in building energy evaluation in Korea, does not reflect natural lighting when calculating lighting energy. EN 15193-1: 2017 specifies the method of analyzing lighting energy reflecting natural lighting, so the analysis was conducted based on the algorithm. First, after establishing the natural lighting variable in the algorithm, different input values were set according to the conditions of the variable. And the result was derived through the simulation using Relux, a lighting energy analysis program that reflects the EN 15193 algorithm. After confirming the effect of natural lighting on energy calculation through the result, the degree to which each variable contributes to the final result was additionally analyzed. Multiple regression analysis was conducted with the SPSS program as a method, and through this, priorities between variables were derived. As a result of the analysis, it was confirmed that the influence was high in the order of window area ratio, shade coefficient, merchant room height, glass light transmittance, shading, and dimming. As a result of confirming how natural lighting variables are applied in the algorithm and their influence, natural lighting must be reflected in the review of lighting energy consumption. - COLLAPSE
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Analysis of Lighting Energy Reduction Effect according to Natural Lighting Influence Factors Based on EN 15193 Algorithm
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Research Article
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Analysis of Seasonal Indoor Illuminance Variation Due to Angle Control of the Light-Concentrating Part of Daylight-Concentrating Indoor Louver
집광채광 실내루버 집광부의 각도제어에 따른 절기별 실내 조도변화 분석
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Lee, June-Hae, Kang, Jae-Sik
이준혜, 강재식
- The application of various renewable energy products is essential to reduce carbon emissions from buildings. Daylight-concentrating indoor louvers are expected to play …
- The application of various renewable energy products is essential to reduce carbon emissions from buildings. Daylight-concentrating indoor louvers are expected to play a significant role in achieving zero-energy buildings in the future, as they have been included in the list of renewable energy facilities in South Korea since 2018. This study analyzes the effect of controlling the angle of the light-collecting part of the Daylight-concentrating indoor louver on indoor illuminance. In a experimental chamber, three types of angle control were compared under the same external illuminance conditions during the intermediate and winter seasons. The experimental results showed that during the intermediate season, tilting the louver angle to the outside (+15 degrees) was advantageous, while during the winter season, tilting it to the inside (-15 degrees) was more beneficial. Analysis of indoor illuminance values at different positions showed that during the intermediate season, the indoor illuminance at 5 m depths was higher when the louver was in the horizontal position compared to when tilted to the outside (+15 degrees). Through this study, the beneficial effects of controlling the angle of the light- collecting part of Daylight-concentrating indoor louvers on indoor lighting were confirmed. - COLLAPSE
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Analysis of Seasonal Indoor Illuminance Variation Due to Angle Control of the Light-Concentrating Part of Daylight-Concentrating Indoor Louver
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Research Article
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Experimental and Energy Performance Study of Cascade Heat Pump System with Renewable Heat Sources for Air and Water Heating
신재생열원 적용에 따른 캐스케이드 히트펌프의 급탕 및 공기난방에 대한 실험 및 에너지 성능 연구
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Kim, Beom-Jun, Jeong, Jae-Weon
김범준, 정재원
- The purpose of this study is to conduct an experimental performance evaluation applying renewable heat sources to the cascade heat pump system …
- The purpose of this study is to conduct an experimental performance evaluation applying renewable heat sources to the cascade heat pump system compared to the air source in the winter. The renewable heat sources applied are geothermal and solar heat sources. The cascade heat pump supplies hot water from a high-cycle heat pump and air heating from a low-cycle heat pump. For the experiment, the cascade heat pump was manufactured and installed on the basement floor of the experimental building. The air source was supplied by an outdoor unit, the geothermal source by a geothermal simulator, and the solar source by a photovoltaic-thermal panel. The average value of the measured values for 10 minutes after the system was stabilized was used. The experimental results showed that applying renewable heat sources resulted in improved results in terms of heat capacity and supply fluid temperature, and the system COP was confirmed to have a performance improvement effect of 10.7% for the geothermal source and 6.1% for the solar source compared to the air source. This is the result of improved system performance while satisfying both the indoor heating load and the domestic hot water load flow rate. On the other hand, the temperature of the solar heat source was higher than that of the geothermal source, but low performance was derived. This is because the circulation flow of the solar heat source was circulated at 27% of that of the geothermal source, so relatively little heat was supplied to the heat pump. The cascade heat pump system of this study was installed with the indoor unit after the intermediate heat exchanger for domestic hot water. Therefore, a large amount of heat was supplied to the domestic hot water side. The performance of heating and domestic hot water can be affected depending on the installation order of the heat exchanger, regardless of the type and supply temperature of the heat source. - COLLAPSE
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Experimental and Energy Performance Study of Cascade Heat Pump System with Renewable Heat Sources for Air and Water Heating
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Research Article
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Trends in the Application of Environment-Friendly Technical Alternatives to Education and Research Facilities in the USA through Analysis of LEED Certified Projects
LEED 인증 사례 분석을 통한 환경친화적 기술 대안의 미국 내 교육연구시설 적용 동향
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Cho, Hye-Jin, Jeong, Chang-Ho
조혜진, 정창호
- Education and research facilities require a relatively high level of indoor environment quality compared to other buildings due to the main users …
- Education and research facilities require a relatively high level of indoor environment quality compared to other buildings due to the main users and the main activity characteristics of the building, and the total energy consumption and energy consumption per unit area are also relatively large. Therefore, interest in environment-friendly and energy-saving passive and active alternatives applicable to education and research facilities is increasing. In this study, 118 education and research facilities in the United States that have received LEED certification, an eco-friendly architecture certification program that is widely used internationally, were analyzed and presented for the application trend of environment-friendly technology alternatives in the recent 10 years. - COLLAPSE
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Trends in the Application of Environment-Friendly Technical Alternatives to Education and Research Facilities in the USA through Analysis of LEED Certified Projects
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Research Article
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Comparative Analysis of Thermal Bridges by Installation Location of Single and Double Glazed Windows
단창 및 이중 창호의 설치 위치별 설치 열교 비교 분석
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Lim, Su-Hyun, Jeon, Min-Seok, Park, Sung-Jung
임수현, 전민석, 박성중
- In this study, window installation thermal bridges are reviewed for single glazed window and double glazed window. In addition, through the comparison …
- In this study, window installation thermal bridges are reviewed for single glazed window and double glazed window. In addition, through the comparison of thermal bridges and Temperature Difference Ratio by window installation location, to propose an appropriate window installation method in terms of insulation performance and condensation prevention. For this, the minimum surface temperature and linear thermal bridges are reviewed through two-dimensional thermal transfer analysis, and the point thermal bridge by the bracket is analyzed through three- dimensional thermal transfer analysis. In addition, Using the derived results, window thermal transmittance including the window installation heat bridge was reviewed. - COLLAPSE
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Comparative Analysis of Thermal Bridges by Installation Location of Single and Double Glazed Windows
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Research Article
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Effect and Comparative Analysis on Final Cooling Energy Use of Air-cooled Chiller according to Application of Part-load Factors as Specfied in EN 16798-13
EN 16798-13 기준 공랭식 냉동기의 부분부하계수 적용에 따른 에너지 소요량 영향 및 비교 분석
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Park, Sung-Jung
박성중
- The demand for energy calculation of existing building to reduce carbon emissions from buildings is increasing. The ISO 52000 series specifies the …
- The demand for energy calculation of existing building to reduce carbon emissions from buildings is increasing. The ISO 52000 series specifies the overall building energy analysis method, and the EN 16798-13 standard presents a final cooling energy calculation method in the building energy analysis ISO 52000 series. In particular, it presents a monthly method algorithm including a monthly part-load value and a monthly corrected EER (Energy Efficiency Ratio). According to EN 16798-13 standard, there are technical items that affect the final cooling energy of air-cooled chillers. This study examined the range of influence on final cooling energy for each of the four technical items targeting Hwa-gok 119 Center building. The influence of the corrected EER due to outdoor temperature change in the range of -1℃ to 4℃ was evaluated, and the effect of the final cooling energy when installed generator cooling power (from 0% to 300%) increases compared to the maximum cooling load was analyzed. The control option and compressor type were evaluated to determine how much influence they have on final cooling energy, and finally the effect of multiple generators on final cooling energy when cooling generators with different power are installed. Through this analysis, it is possible to evaluate the effect on final cooling energy and distinguish the importance of technical items. In other words, the goal is to help establish a strategy for technical methodology to reduce final cooling energy and thus reduce carbon emissions when remodeling building. - COLLAPSE
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Effect and Comparative Analysis on Final Cooling Energy Use of Air-cooled Chiller according to Application of Part-load Factors as Specfied in EN 16798-13
Journal Informaiton
Journal of Korean Institute of Architectural Sustainable Environment and Building Systems
Journal of Korean Institute of Architectural Sustainable Environment and Building Systems
Korean Institute of Architectural Sustainable Environment and Building Systems
한국건축친환경설비학회
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Tel: +82-2-552-0412 / Fax: +82-2-552-8012 / E-mail: kiaebs@kiaebs.org Copyright© Korean Institute of Architectural Sustainable Environment and Building Systems. Powered by APUB
Tel: +82-2-552-0412 / Fax: +82-2-552-8012 / E-mail: kiaebs@kiaebs.org Copyright© Korean Institute of Architectural Sustainable Environment and Building Systems. Powered by APUB