• Research Article

    Development of Process to Supplement the IFC Model Requirement Information for OpenBIM-based Building Energy Performance Evaluation

    건물에너지 성능평가를 위한 개방형 BIM 기반 IFC 모델의 요구정보 보완 프로세스 개발

    Park, Seong-Hyun, Lee, Yong-Ha, Park, Chang-Young, Jang, Hyang-In

    박성현, 이용하, 박창영, 장향인

    This study proposes a method for modifying and supplementing IFC model for building performance evaluation without requiring authoring BIM software. The proposed … + READ MORE
    This study proposes a method for modifying and supplementing IFC model for building performance evaluation without requiring authoring BIM software. The proposed algorithm identifies the information required for BIM-based energy performance evaluation, such as building geometry, material, building envelope properties, and building system properties, and supplements the required information according to each type of information. The algorithms consider various scenarios of information availability, such as missing or incomplete information. The results of supplementing each type of algorithm demonstrate that building performance evaluation can be performed without using commercial BIM tools, which can significantly reduce the cost and time required for building performance evaluation. This approach increases the reliability of BIM-based performance evaluation and can contribute to achieving sustainable building design and operation. In conclusion, this study shows that the IFC model can be modified and supplemented for building performance evaluation without using separate commercial BIM software. The proposed algorithm for supplementing required information can be applied in various scenarios of information availability. - COLLAPSE
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    28 February 2024

  • Research Article

    Diagnosis about Hindrance of Pre-audit and Application in Public Green-remodeling Project

    공공건축물 그린리모델링 사전조사의 수행과정 및 활용에 따라 발생되는 장애요인 진단

    Ha, Rae-Gyung, Nam, In-Sik, Oh, Byoung-Chull

    하래경, 남인식, 오병철

    As Government endeavor to accomplish NDCs, discussion of green-remodeling (GR) which main reduction policy of greenhouse gas emission for old buildings stoke … + READ MORE
    As Government endeavor to accomplish NDCs, discussion of green-remodeling (GR) which main reduction policy of greenhouse gas emission for old buildings stoke is also activated. To integrate green remodeling into private housing market, in green-remodeling project, early stage that judge whether green-remodeling is proper to old building is important. The purpose of this paper is that present hindrance during the early stage of green-remodeling project. For this, error issues related to pre-audit and its application are extracted from the results of public green remodeling project that have been operating by the Ministry of Land, Infrastructure and Transport since 2020. The issues are classified depend on work phase, and then reclassified by influence factors modified from HFACS. As a result, planning green-remodeling phase is the most controversial phase for all of work flow, and systematic factor is recognized as the most influential factor to hinderance issues. To smooth proceed of green-remodeling project, these are need to; 1) schedule whole project progress as consider existence or nonexistence of blue-print, 2) make purpose of construction programming clearly. Additionally, collaboration public management in local government and resident’s understanding of green-remodeling are required. - COLLAPSE
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    28 February 2024

  • Research Article

    Domestic Research Trends in Greenhouse Energy: A Comprehensive Review

    온실의 에너지 소비에 대한 연구 동향 고찰

    Song, Su-Bin, Yoon, Seong-Hwan

    송수빈, 윤성환

    In the wake of the Intergovernmental Panel on Climate Change (IPCC) Fifth Assessment Report, an array of supplementary studies has been undertaken … + READ MORE
    In the wake of the Intergovernmental Panel on Climate Change (IPCC) Fifth Assessment Report, an array of supplementary studies has been undertaken to investigate the repercussions of climate change on crop production and associated variables. The results reveal a decline in global average yields of major crops, including corn, wheat, and soybeans, by 4.1%, 1.8%, and 4.5%, respectively, in comparison to the pre-industrial climate era. This phenomenon portends a further exacerbation of food security concerns with a projected additional temperature increase of 1.5°C in the foreseeable future. The emergence of sustainable agricultural practices, encompassing greenhouse cultivation and advancements in smart farming technology and markets, has gained traction. Greenhouse farming, characterized by its capacity for consistent crop production irrespective of weather conditions, presents a viable solution. However, it is incumbent upon us to address the energy-intensive nature of greenhouse operations, which necessitate heating, cooling, and lighting. In pursuit of sustainable agriculture and bolstered food security, a paradigm shift toward energy-efficient smart farming practices tailored to the local context is imperative. This study undertakes a comprehensive analysis and discourse on prevailing trends in domestic research pertaining to energy in smart farming. The aim is to provide foundational insights that can underpin future research endeavors focused on innovative low-energy greenhouse design techniques. - COLLAPSE
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    28 February 2024

  • Research Article

    Analysis of Time-dependent Changes in Thermal Comfort of Occupants according to Short-term Thermal Experience: To Uncomfortable Hot

    단기 열 경험에 따른 재실자 온열 쾌적감의 시각별 변화 특성 분석

    Ryu, Ji-Hye, Kim, Sang-Hee, Lee, Kwon-Hyung

    류지혜, 김상희, 이권형

    This study aims to identify changes in thermal sensation when the indoor thermal environment suddenly changes after a short-term thermal experience. To … + READ MORE
    This study aims to identify changes in thermal sensation when the indoor thermal environment suddenly changes after a short-term thermal experience. To understand the thermal adaptation process, it is examined on a time scale of minutes. This study focused on the mechanisms of thermal adaptation changes to hot thermal sensations. The experiment was conducted with two scenarios targeting 13 participants (Scenario 1. From comfortable to uncomfortable hot, Scenario 2. From uncomfortable cold to uncomfortable hot). At the same time as performing the experiment, thermal sensation vote (TSV) and comfort sensation vote (CSV) were surveyed using the right-here-right-now method. Depending on the difference in the previous thermal experience, TSV and CSV were affected from immediately after the change in the indoor thermal environment to 6 minutes. It showed a gradual change and reached a steady-state 15 minutes. Predicted mean vote (PMV), an objective evaluation index, and TSV, a subjective evaluation index, showed a difference immediately after the change in the indoor thermal environment. In order to closely control the indoor thermal environment, it is believed that the thermal experience and thermal adaptation aspects of occupants should be reflected. - COLLAPSE
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    28 February 2024

  • Research Article

    A Study on the CAD-Based Quantity Automation Extraction Model for the Calculation of Embodied Carbon Emissions of Existing Buildings

    기존 건축물의 내재 탄소 배출량 산출을 위한 CAD 기반 물량 자동화 추출 모델에 관한 연구

    Kang, Chan-Hyeok, Park, Chang-Young, Park, Seong-Hyun, Choi, Chang-Ho

    강찬혁, 박창영, 박성현, 최창호

    While the world has been focusing its efforts on reducing greenhouse gas emissions to address climate change, South Korea has seen the … + READ MORE
    While the world has been focusing its efforts on reducing greenhouse gas emissions to address climate change, South Korea has seen the highest increase in per capita CO2 emissions among OECD countries, necessitating a government-level response. The South Korean government has been implementing various policies to reduce greenhouse gases emitted during the construction and operation phases of buildings. These policies primarily focus on reducing energy usage in buildings and installing renewable energy sources, but research on carbon reduction technologies through resource conservation and recycling is still lacking. Nonetheless, reducing carbon emissions over the course of a building’s life cycle of buildings is becoming increasingly important, and Life Cycle Assessment (LCA) is an indispensable method for this purpose. The LCA uses the quantity of building materials used in construction, and to support this, study was conducted to develop a CAD-based automated quantity extraction model. However, this model has shown an error rate of 5-20%, failing to fully account for manual errors by workers and the complexity of construction sites. To address this issue, further research is needed to develop a more accurate prediction model for the quantity of building materials. - COLLAPSE
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    28 February 2024

  • Research Article

    Analysis of Heavy-weight Impact Sound Insulation during Curing Period of Floor Finishing Mortar in Apartment Building

    공동주택 마감 모르타르 양생 기간에 따른 중량충격음 저감성능 분석

    Koo, Bon-Soo, Hong, Seong-Shin, Kim, Sin-Tae, Kim, Myung-Jun

    구본수, 홍성신, 김신태, 김명준

    In this study, we compared the heavy-weight impact sound reductions by bang machine and rubber ball according to the curing period of … + READ MORE
    In this study, we compared the heavy-weight impact sound reductions by bang machine and rubber ball according to the curing period of finishing mortar at construction sites of apartment. And the changes of reductions before and after mortar crack sealing were examined. As a result, it was found that the performance differences of impact sound insulation in single number quantity (SNQ, LiA,Fmax) were minimal after the 4-week curing period of the finishing mortar in case of the bang machine. Similarly, in case of the rubber ball, the performance differences were also decreased within 1.0 dB after the 4-week curing period. Therefore, it can be estimated that the curing period of the finishing mortar must be secured for at least 4 weeks for the reliable test result of impact sound insulation. In addition, the improvement of impact sound insulation (SNQ, LiA,Fmax) by mortar crack sealing were 0.8 to 2.5 dB for the bang machine. Even though the improvement for the rubber ball were insignificant in comparison with the bang machine, the results showed that finishing mortar crack sealing is an essential requirement to prevent deterioration in impact sound insulation. - COLLAPSE
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    28 February 2024

  • Research Article

    Comparative Evaluation of Environmental Performance of Negative Pressure Isolation Ward and General Ward Using IoT Sensors

    IoT 센서를 이용한 음압격리병동 및 일반병동 환경성능 비교 평가

    Kim, Ji-Hi, Kim, Je-Hyun, Sung, Min-Ki

    김지희, 김제현, 성민기

    In this study, an Internet of Things (IoT) environmental sensor was developed to effectively manage indoor air quality in Negative Pressure Isolation … + READ MORE
    In this study, an Internet of Things (IoT) environmental sensor was developed to effectively manage indoor air quality in Negative Pressure Isolation Wards (NPIWs). Using this sensor, environmental performance data of both NPIWs and general patient rooms were analyzed. During the summer, humidity levels were consistently high in all rooms, while in the fall, humidity levels decreased by approximately 30% in Hospital A and 20% in Hospital B. Among the general patient rooms, multi-patient rooms exhibited elevated concentrations of CO2. PM2.5 concentrations were largely influenced by outdoor air, registering low values in most rooms. However, medical procedures or disinfection processes led to PM2.5 concentrations within hospital rooms spiking to over 50 times the initial levels, taking about 4 hours to recover. The data acquired in this study is expected to serve as foundational information for the effective management of indoor air quality in NPIWs in the future. - COLLAPSE
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    28 February 2024
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