• Research Article

    G-SEED Certification Status and Improvement Strategies for Non-residential Buildings-Focusing on 2016 to 2023 Trends

    비주거용 건축물의 녹색건축 인증 취득 현황 및 개선 방향:2016년~2023년 인증현황을 중심으로

    Yun Yo-sun, Jang Dae-hee

    윤요선, 장대희

    In this study, the certification status and scoring trends of nonresidential buildings that received the Green Standard for Energy and Environmental Design … + READ MORE
    In this study, the certification status and scoring trends of nonresidential buildings that received the Green Standard for Energy and Environmental Design (G-SEED) certification between 2016 and 2023 were analyzed. The aim was to identify trends and areas for improvement within the certification system. Certification data were examined based on various factors, including year, rating, region, certification version, building area, and public/private classification. Further, certification scores were analyzed by final grade and specialized field scores. The analyses revealed key characteristics and trends in the evaluation of nonresidential buildings under the G-SEED system. First, significant differences were identified in building area, public/private ratios, average scores, and specialized field scores depending on building use. Future revisions to the G-SEED system should consider refining the classification of building use and adjusting the evaluation criteria accordingly. Second, private buildings exhibited a higher proportion of certification acquisition than that of public buildings. To further encourage certification in the private sector, policy support and incentives (e.g., tax benefits) are recommended. Third, school facilities exhibited different trends compared to other building types, with relatively low scores. This finding underscores the need for evaluation criteria and policies that address specific characteristics of school facilities. Fourth, the analysis of specialized field scores indicated that the operation and maintenance (O&M) field contributed the most to overall scores, highlighting the need for revisions to balance the difficulty and discriminative power of certification criteria. Enhancing the evaluation framework and redefining the direction of each specialized field are crucial for improving the G-SEED system. - COLLAPSE
    PDFXMLCitation
    ReferencesInformation
    30 April 2025

  • Research Article

    Experimental Study on the Cooling Energy Consumption According to Operation Condition of the Electric Heat Pump System

    전기 히트펌프 시스템의 운전조건에 따른 냉방 에너지 소비량에 관한 실험적 연구

    Kim Tae Yang, Kim Hyo Jun, Lee Jin Hyun, Lee Han Gyeol, Cho Young Hum

    김태양, 김효준, 이진현, 이한결, 조영흠

    The study aim was to derive optimal operating conditions by considering the initial indoor load and energy efficiency of an electric heat … + READ MORE
    The study aim was to derive optimal operating conditions by considering the initial indoor load and energy efficiency of an electric heat pump (EHP) system. In this study, the set temperature and supply air volume were classified by case, and a comparative analysis was conducted after calculating the cooling capacity, recommended temperature arrival time, power consumption, energy consumption, and Coefficient of Performance (COP) under different operating conditions. An experiment was conducted in which the target space was selected and a sensor was used to measure the indoor temperature. Further, a hot wire anemometer was installed at the inlet of the evaporator outlet to measure the discharge wind speed. To measure the refrigerant temperature change, thermocouples were attached to the inlet and outlet pipes of the evaporator and condenser. The study findings revealed that operating the EHP system by setting the temperature low and supply air volume large until the recommended temperature was reached was the driving method that quickly eliminated the initial indoor load and consumed the least energy. - COLLAPSE
    PDFXMLCitation
    ReferencesInformation
    30 April 2025

  • Research Article

    A Study on Generation Characteristics of Photovoltaic Plants in the Sub-regions of Jeju Island through Analysis of Capacity Factors and Sunshine Durations

    이용률과 일조시간 분석을 통한 제주도 세부 지역 태양광발전소의 발전특성에 대한 고찰 연구

    Chen Siyu, Lee Gaemyoung

    진사우, 이개명

    This study investigated and compared sunshine duration and capacity factors of photovoltaic power generation across four regions of Jeju Island. The regional … + READ MORE
    This study investigated and compared sunshine duration and capacity factors of photovoltaic power generation across four regions of Jeju Island. The regional classification system used in this study was based on climate divisions defined by the Korea Meteorological Administration, which differ from administrative divisions. The four regions—northern, western, eastern, and southern—exclude the mountainous region, which has few photovoltaic power plants. This classification system was chosen to utilize long-term accumulated weather data (e.g., sunshine duration) managed by the Korea Meteorological Administration. Five years of generation data from at least three photovoltaic power plants in each of the four regions were obtained from the Korea Power Exchange and used for the analysis. Strong positive correlations were found between sunshine duration and the capacity factor of photovoltaic power generation in all four regions. When comparing the capacity factors of the four regions, the northern region showed rates approximately 10% lower than those of the other regions. The difference in capacity factors—approximately 45%—between the northern and southern regions was particularly significant in winter. This phenomenon might have been triggered by the Foehn effect in Halla Mountain at the center of Jeju Island, which is 1,950 m high. This study provides seasonal and annual capacity factor reference data for four regions of Jeju Island. The data should be useful for new photovoltaic power plant investors and operators. Furthermore, the analysis conducted in this study demonstrated that utilizing accumulated sunshine duration data is an effective method for improving the reliability of short-term photovoltaic power generation data. - COLLAPSE
    PDFXMLCitation
    ReferencesInformation
    30 April 2025

  • Research Article

    Evaluation of Thermal Performance of an Unglazed Transpired Collector based on Numerical Analysis for Agricultural Buildings

    농업시설 활용을 위한 수치해석 기반 무창기공형 태양열 집열기 열성능 평가

    Moon Byeong-Eun, Kang Dae-Yeong, Kim Hyeon-Tae

    문병은, 강대영, 김현태

    In this study, an experimental setup for an unglazed transpired collector was developed to evaluate temperature variations and efficiency. Temperature variations and … + READ MORE
    In this study, an experimental setup for an unglazed transpired collector was developed to evaluate temperature variations and efficiency. Temperature variations and efficiency were measured using the experimental setup and predicted through a numerical analysis based on computational fluid dynamics (CFD) and a 3D model. Finally, the measured and predicted values were compared and analyzed to evaluate the potential applicability for agricultural buildings. The experimental setup and scaled-down 3D model without repetitive shapes were developed to conduct the experiments and simulations. Under the same experimental conditions, the maximum measured outlet temperature was 65.4°C, whereas the predicted temperature was 65.2°C. The coefficient of determination (R2) and root mean square error (RMSE) obtained from the comparison between measured and predicted values for the unglazed transpired collector were R2 = 0.64, RMSE = 5.76°C for the absorber surface temperature; R2 = 0.98, RMSE = 2.65°C for the plenum temperature; and R2 = 0.99, RMSE = 0.83°C for the outlet temperature. The average experimental thermal efficiency of the unglazed transpired collector was 66%, whereas the numerically predicted efficiency was estimated to be 72%. - COLLAPSE
    PDFXMLCitation
    ReferencesInformation
    30 April 2025

  • Review

    Analysis of Glare Measurement Methods for BIPV Modules

    BIPV 모듈의 눈부심 평가 방법에 관한 연구

    Kim Hayeong, Kim Jinhee, Kim Juntae

    김하영, 김진희, 김준태

    Recently, concerns over light pollution caused by solar reflections from building exterior materials and photovoltaic (PV) modules have been increasing. Additionally, with … + READ MORE
    Recently, concerns over light pollution caused by solar reflections from building exterior materials and photovoltaic (PV) modules have been increasing. Additionally, with the expansion of renewable energy installations to meet carbon neutrality goals, the use of Building-Integrated Photovoltaic (BIPV) systems has increased. Consequently, concerns about glare problems caused by BIPV systems have grown. Some countries have implemented regulations to prevent glare damage by limiting the reflectance of building exterior materials. However, BIPV modules are designed with technologies that minimize surface reflectivity to enhance power generation performance. Nevertheless, BIPV use large-scale installation on building facades, which can lead to prolonged glare events. Therefore, simple reflectance regulations are insufficient as glare mitigation strategies; methods to quantitatively evaluate glare phenomena—including their occurrence, duration, and intensity—are needed. Various studies have been conducted to evaluate the glare of BIPV modules, mostly focusing on specific environments such as airports or large-scale solar power plants, and mainly through simulations. However, there is a lack of research on glare evaluation methods for BIPV modules installed in residential and commercial buildings. Especially, differences in glare occurrence criteria, measurement factors, and evaluation ranges make it difficult to quantitatively compare and analyze research results. Therefore this study analyzes the trends in research on glare evaluation methods for BIPV modules and related regulations in different countries. Based on this analysis, we propose a glare evaluation method for BIPV modules, measurement factors and evaluation ranges. - COLLAPSE
    PDFXMLCitation
    ReferencesInformation
    30 April 2025

  • Research Article

    Numerical Simulation-Based Analysis of Fire Spread Performance in BIPV Cladding Systems

    시뮬레이션을 통한 BIPV 클래딩 시스템의 화재 확산 성능 분석

    Jeong Subin, Kim Jinhee, Kim Juntae

    정수빈, 김진희, 김준태

    The cavity behind photovoltaic (PV) modules can act as a conduit for flame and smoke in the event of a fire in … + READ MORE
    The cavity behind photovoltaic (PV) modules can act as a conduit for flame and smoke in the event of a fire in a building-integrated PV (BIPV)-clad building. This is particularly problematic in vertically installed systems, where the stack effect accelerates the spread of fire and smoke. Fire-resistant structures are required to address these issues. However, conventional fire-resistance methods, such as filling the PV cavity with noncombustible materials, increases module temperatures and reduces electrical power generation. To overcome this challenge, a structural design is required that facilitates ventilation during normal operation while also providing fire resistance in case of a fire. We designed a structure featuring glass wool insulation and fire dampers placed in the rear cavity of a BIPV module. Simulation analyses were conducted to evaluate the fire spread performance of the proposed design with the integrated fire-resistant structure. The effectiveness of the fire-resistant model was compared with that of a basic model without a fire-resistant structure. The results revealed differences in the fire behavior between the models, particularly regarding the maximum temperature and the time required to reach it. The fire-resistant model more effectively reduced temperatures than the basic model, with external and Internal side of main wall and side wall temperatures that were 47, 255, and 402℃ lower, respectively. Furthermore, the time required to reach the maximum temperature was delayed by 459, 491, and 222 s in these areas, respectively. Also, the basic model failed and the fire-resistant model successfully met the fire safety standards. - COLLAPSE
    PDFXMLCitation
    ReferencesInformation
    30 April 2025
리스트형 보기썸네일형 보기
Journal Informaiton Journal of the Korean Solar Energy Society Journal of the Korean Solar Energy Society
Online Submission
  • NRF
  • KOFST
  • crossref crossmark
  • crossref cited-by
  • crosscheck
  • orcid
  • open access
  • ccl
Journal Informaiton Journal Informaiton - close