• Research Article

    Analysis of Infiltration Routes in Apartment Houses using Blower Door Tests

    블로워 도어 테스트를 이용한 아파트의 침기 루트 분석

    Mun, Jung-Hyon, Lee, Jong-Ik, Kim, Min-Sung

    문정현, 이종익, 김민성

    Blower door tests were carried out for two weeks to measure infiltration in two apartment houses located in Sejong, Korea. Preliminary measurement ... + READ MORE
    Blower door tests were carried out for two weeks to measure infiltration in two apartment houses located in Sejong, Korea. Preliminary measurement was carried out to investigate infiltration routes of the households for one week. In the main measurement, infiltration rates through the infiltration routes were measured as the pressure difference between indoor air and outdoor air was changed. Six sets of measurements were carried out and the measurement data were used to estimate flow coefficients (C) and pressure exponents (n) of all infiltration routes. To investigate feasibility of the analysis method, the linear regression method and the iterative method were used. Through the feasibility study, the criteria to determine whether to stop or continue the calculation process were found. The criteria is that R2 of the regression model of each case should be bigger than 0.9 and the pressure exponents (n) of the regression model for the previous blower door test case should be smaller than or equal to that of the following case. Using the criteria found in the feasibility study, the infiltration analysis was carried out which uses iterative approach to find sets of flow coefficients and pressure exponent to make the average R2 value for all cases maximized. As a result of infiltration analysis, it was observed that the calculated pressure exponents of all regression model for a household was same. - COLLAPSE
    October 2020
  • Research Article

    A Study on Analysis of the Effectiveness according to Air Conditioning Methods for Reducing Heating and Cooling Energy Demand of the Office Building

    건축물의 에너지 요구량 감축을 위한 전 공기 방식 공기조화의 제어방식별 유효성 분석에 관한 연구

    Jung, Seung-Won, Lee, Tae-Kyu, Kim, Ji-Young, Kim, Jeong-Uk

    정승원, 이태규, 김지영, 김정욱

    Office buildings are supplied with heating and cooling sources mainly by the centralized air conditioning system. Therefore, the level of energy demand ... + READ MORE
    Office buildings are supplied with heating and cooling sources mainly by the centralized air conditioning system. Therefore, the level of energy demand must be determined in advance according to the condition of the building and the characteristics of the air conditioning system. In particular, we tried to prove that the cooling energy demand was reduced through the introduction of out side air by operating the multi-unit duct system for each zoning compared to the existing single unit duct system in view of maintaining the thermal comfort of residents. As a result of the simulation, the Air conditioning by ventilation is effective for reduction of cooling and latent energy demand. Furthermore, multi-unit duct system has more efficient than single unit duct system. We expect that this study will provide us a base line for full scale research on economic efficiency within single unit duct and multi-unit duct air conditioning system. - COLLAPSE
    October 2020
  • Research Article

    A Study on The Average Performance and Reference Model depending on Passive and Active Factor for Zero Energy Building Certification in Smart City - Focused on Education and Research Facilities and Office -

    스마트시티 설계 시 제로에너지건축물 인증 취득을 위한 패시브/액티브 인자별 평균성능 및 참조모델 제시 - 교육연구 및 업무시설을 중심으로 -

    Lee, Da-Young, Yoo, Dong-Chul, Jo, Su-Young, Park, Chang-Young, Jang, Hyang-In

    이다영, 유동철, 조수영, 박창영, 장향인

    To implement the zero-energy building policy in establishing the smart city, reference models of zero-energy buildings were suggested in this study. Reference ... + READ MORE
    To implement the zero-energy building policy in establishing the smart city, reference models of zero-energy buildings were suggested in this study. Reference models that reflect the average performance of energy-related factors were designed. Passive and active influencing factors were selected from the literature review. Then, the values of influencing factors in reference models were derived from the average performance of the 1++ rating certification cases. The building purposes of the reference models were selected as education & research and office, and were then subdivided according to the detailed purpose or size. To validate the models, the energy performance of the reference models was simulated and the results of simulation showed that all reference models achieve the 1++ rating which meets the criteria of zero-energy building certification. The influencing factors and reference values that were suggested in this study are expected to be used in designing the zero-energy building and further studies that develop the reference models of other cases. - COLLAPSE
    October 2020
  • Research Article

    Evaluation of Indoor Environment and Energy Performance with Slat Adjustment Method of Split Blinds

    스플릿 블라인드의 슬랫 조절 방식에 따른 실내 환경 및 에너지 성능 평가

    Rhee, Kyu-Nam, Jung, Gun-Joo

    이규남, 정근주

    The performance of Venetian blinds can be improved by adopting split blinds by which the slat angle in the upper and lower ... + READ MORE
    The performance of Venetian blinds can be improved by adopting split blinds by which the slat angle in the upper and lower part of the blinds can be separately adjusted. In this study, the impact of the split blinds on the lighting/thermal environment and energy consumption was investigated through field measurement, occupant survey and energy simulation. Four different adjustment methods were evaluated: Case 1 (No blind), Case 2 (All slats open), Case 3 (Upper slats open, lower slats closed), and Case 4 (All slats closed). The evaluation result of lighting environment showed that Case 3 is effective in preventing the excessive illuminance level as well as glare in the winter season, while Case 2 or 3 is suitable for the summer season because the high solar altitude reduces the transmitted solar energy, which leads to the reduced glare risks. The evaluation result of thermal environment revealed that acceptable thermal comfort can be achieved by Case 2 or 3 in the winter season, and Cases 2 to 4 in the summer season. Energy simulation results showed that the overall energy consumption (heating, cooling and lighting energy) can be minimized by applying Case 3, by which the energy consumption can be reduced by 6.2% compared to Case 1. - COLLAPSE
    October 2020
  • Research Article

    Analysis of Facility Users’ Needs for Information Uses and Management of Indoor Air Quality in Multi-use Facilities

    다중이용시설의 실내공기질 정보활용 및 관리를 위한 시설이용자의 요구분석

    Eom, Ye-Seul, Shin, Hee-Won, Kang, Dong-Hwa

    엄예슬, 신희원, 강동화

    The objective of this study was to analyze the facility user’s needs to utilize the indoor air quality (IAQ) information and ... + READ MORE
    The objective of this study was to analyze the facility user’s needs to utilize the indoor air quality (IAQ) information and to manage the IAQ in multi-use facilities. For this purpose, The survey was conducted on 161 facility users of daycare centers, elderly care facilities, and underground complexes. The survey questions were composed of the causes of air pollution, the degree of satisfaction of IAQ in the facility, and the scope of IAQ information. The results show that the degree of interest in IAQ of facility users was very high. 79.5% of the respondents responded that the IAQ of the facility affects their visits. However, only 8.7% of respondents said they were provided with IAQ information. Also, 68.3% of the respondents hoped to receive IAQ information directly from the field or through mobile applications. In order to provide effective IAQ information, this study suggests the need to provide IAQ information at the facility site with the use of mobile applications reflecting the needs of facility users. - COLLAPSE
    October 2020
  • Research Article

    Energy Evaluation of Data Center with Low Cooling Water Temperature and Free Cooling

    저온냉각수 및 Free Cooling 적용에 의한 데이터센터의 냉방성능 검토

    Kim, Yu-Jin, Ha, Ju-Wan, Park, Kyung-Soon, Lee, Keon-Ho, Song, Young-Hak

    김유진, 하주완, 박경순, 이건호, 송영학

    The size and number of internet data center (IDC) has been growing rapidly as IT demand has increased recently. IDC needs 10 ... + READ MORE
    The size and number of internet data center (IDC) has been growing rapidly as IT demand has increased recently. IDC needs 10 times as much energy as regular office buildings, there are problems with global warming and increasing carbon emissions. IDC's cooling energy consumption to maintain the IT equipment environment accounts for about 35% of total energy consumption. Therefore, the use of cooling energy was reviewed through simulation by applying the low cooling water temperature system and the free cooling system in this system. Based on this, cooling performance was analyzed using MLC (Mechanical Load Component) indicators. As a result of the simulation, energy consumption in low cooling water temperatures decreased by 8% compared to normal water-cooling systems, while WSE (Water Side Economizer) and ASE (Air Side Economizer) decreased by 26% and 32%, respectively. Since the MLC of conventional water-cooled system was 0.13 which is lower than Incheon's maximum allowable value of 0.18. As a result of the MLC analysis, it was determined that the cooling system was properly designed. The cooling energy usage showed a significant reduction rate in the order of low cooling water temperature, WSE, and ASE, and the ASE was the most efficient operation with 26.3%. - COLLAPSE
    October 2020
  • Research Article

    A Case Study on Pilot Application of Building Diagnosis Evaluation Method Considering Architectural and Mechanical Elements

    건축 및 기계 요소를 고려한 건물 진단 평가 방법의 Pilot 적용 사례 연구

    Park, Sang-Hoon, Lee, Soon-Myung, Ahn, Nam-Hyuck

    박상훈, 이순명, 안남혁

    The building ages after the completion of its service life after completion, and its usability gradually decreases. Therefore, it is necessary to ... + READ MORE
    The building ages after the completion of its service life after completion, and its usability gradually decreases. Therefore, it is necessary to diagnose a building that accurately grasps the deterioration of usability and causes and problems. In this study, in order to minimize the inconvenience of building users and to prepare an improvement plan to maintain the initial performance of the building, a method for evaluating building diagnostics in the aspect of the building environment was established and the process was conducted for pilot buildings. To secure the validity of the evaluation method, the improvement plan derived from the building diagnosis was applied to the building and the improvement results were analyzed. As a result of applying the improvement plan, the thermal and light environment of the building was improved and the usability of the building could be improved. - COLLAPSE
    October 2020
  • Research Article

    Optimal Model of Office Building according to Heating and Cooling Load and Daylight Control

    사무용 건축물의 조명제어 적용에 따른 실내 냉난방 부하 해석 및 최적 모델 제안

    Kim, Ji-Young, Lee, Tae-Kyu, Kim, Jeong-Uk

    김지영, 이태규, 김정욱

    Recently, energy consumption in the building has risen and it is inevitable to reduce energy consumption and improve energy efficiency as soon ... + READ MORE
    Recently, energy consumption in the building has risen and it is inevitable to reduce energy consumption and improve energy efficiency as soon as possible. In this study, it is possible to recognize the connection between heating, cooling load and the interior heat gain of lights. There are 4 daylight control scenarios applied in each air-nodes. And it is the main purpose to suggest the optimal scenario type by analyzing monthly heating and cooling load simulation for a year. As a result, annual heating and cooling load would be decreased about 1.2%. Consequently, it is effective to introduce the daylight control in the building and it is necessary to analyze the profitable evaluation in the future. - COLLAPSE
    October 2020
  • Research Article

    Development Plan for District Heating Heat Interface Unit (HIU) for Apartment Households

    공동주택 세대용 지역난방 열교환 유닛(HIU)개발 방안

    Kim, Eun-Young, Kim, Yong-Ki, Baek, Cheong-Hoon, Hwang, Dong-Kon

    김은영, 김용기, 백정훈, 황동곤

    With the recent changes in multi-unit housing, improvement is needed in terms of efficient maintenance of the housing facility system. The purpose ... + READ MORE
    With the recent changes in multi-unit housing, improvement is needed in terms of efficient maintenance of the housing facility system. The purpose of this study is to examine the technical possibilities for the integration and development of heating, hot water, and water facilities, and to derive the design direction of the district heating heat interface unit (HIU). In order to derive the integration direction of the district heating HIU as a research method, the relevant standards and the status of facilities in domestic MDUs (Multi Dwelling Unit) and overseas case studies were conducted. The conclusion is as follows. In general, most of the hot water distributors are installed at the bottom of the kitchen sink and the gas meters are installed on the balcony. If it is integrated into the HIU, it is most suitable to install it in a common PD space, and for this, it is necessary to secure enough PD space architecturally. - COLLAPSE
    October 2020
  • Research Article

    Experimental Analysis of Air Volume Change according to Different Filters Installed in a Heat Recovery Ventilator for Residential Buildings

    다양한 필터의 성능에 따른 주거건물용 열회수 환기장치의 풍량 변화 실험 분석

    Cho, Kyung-Joo, Cho, Dong-Woo, Kim, Taeyeon

    조경주, 조동우, 김태연

    Recently, ultrafine dusts have become a social problem in Korea. Dangers resulting from the ultrafine dusts can be increased in Korea because ... + READ MORE
    Recently, ultrafine dusts have become a social problem in Korea. Dangers resulting from the ultrafine dusts can be increased in Korea because Korea had the highest concentration of ultrafine dust among OECD countries in 2019 according to a report published by Greenpeace. Since the heat recovery ventilators are widely used in Korea, these fine dusts could be clarified to some extent with these systems. However, the KS for heat recovery ventilators could not guarantee the performance related to the high-performance filters such as HEPA filter. Nevertheless, there are very few studies on the performance of ventilation systems equipped with high-performance filters although the degradation of the system could be dramatic. For this reason, in this study, experiments of a heat recovery ventilator in an apartment unit carried out for analysing the air volume change according to the 3 different filters as an initial experiment to study its performance. - COLLAPSE
    October 2020
  • Research Article

    A Study on the Thermal Performance Factors and Effects of Each Part of Curtain Wall Frame for Development of Curtain Wall Frame with Thermal Conductivity 1.0 W/m2·K or Less

    열관류율[Uf] 1.0 W/m2·K 이하 커튼월 프레임 개발을 위한 부품 항목 및 성능 영향 연구

    Park, Hye-Young, Park, Sung-Jung

    박혜영, 박성중

    Compared to overseas curtain wall products, domestic curtain wall products have a negative thermal performance. To develop curtain wall frame with thermal ... + READ MORE
    Compared to overseas curtain wall products, domestic curtain wall products have a negative thermal performance. To develop curtain wall frame with thermal conductivity 1.0 W/m2·K or less, it is importance to figure out the thermal performance factors and effects of each part or curtain wall frame. In this work, thermal performance factors such as form and material were classified on 6 parts; aluminium part, gasket, thermal break bar, gasket for setting wimdow, aluminium cover and screw. The thermal performance effect of each part were also calculated according to ISO 12631 and the results were present as a thermal performance improvement rate with in range from the lowest curtain wall thermal transmittance to the highest. The results show that it is thermal break bar which has greatest effect on improving the thermal performance of curtain wall, especially with soft PE foam. - COLLAPSE
    October 2020
  • Research Article

    A Study on the Current Status and Problems of Smart Housing Act based on Life Cycle

    생애주기 기반 스마트하우징 관계법령 현황 및 문제점 도출 연구

    Hwang, Eun-Kyoung, Lee, Jong-Ho

    황은경, 이종호

    Recently, in order to improve the various quality of life of residents, the demand for smart housing based on the fourth industry ... + READ MORE
    Recently, in order to improve the various quality of life of residents, the demand for smart housing based on the fourth industry such as IoT and AI is increasing. In 1980, the smart housing started with home automation, and the related technology development and standards for almost 40 years are underway, but there is no failure yet. Therefore, in this article, we will report the activation of smart housing supply, activation of smart housing supply, and smart housing related laws and situations in each stage of the life of the smart housing, and report on smart housing based on this. I would like to seek directions for system improvement. As a result of examining the laws related to smart housing, problems such as redundancy of evaluation items, different evaluation criteria for the same evaluation items, and confusion in the names of evaluation items among similar criteria were derived. Based on this, it proposed the establishment of integrated standards for smart housing design and the establishment of security standards, clarifying the target and duration of defects in home network facilities, strengthening the system for smart housing maintenance, and preparing guidelines for the revision of the relevant laws on smart housing. - COLLAPSE
    October 2020
  • Research Article

    Energy Saving Potential of Air-source Heat Pump System for Cooling, Heating and Hot Water Supply in Residential Buildings

    주거용 건물을 위한 냉난방 및 급탕 통합 히트펌프 시스템의 에너지 절감 가능성 분석

    Hwang, Yu-Jin, Jeong, Jae-Weon

    황유진, 정재원

    The present study aims to evaluate energy saving potential of heat pump system functioning as cooling, heating and hot water supply applicable ... + READ MORE
    The present study aims to evaluate energy saving potential of heat pump system functioning as cooling, heating and hot water supply applicable for residential buildings. To analyze the advantage of integrating heating and cooling, existing mono function air-source heat pump and radiant floor heating system were set to the reference case. The model building was established in TRNSYS 18, and integrated energy simulation in annual was conducted with all system model equations in EES program. The results show that proposed heat pump system reduced 11-12.5% energy consumption in simulation cases, compared to the reference system. - COLLAPSE
    October 2020
  • Research Article

    Preliminary Study of the Effect of External Weather Experience on Indoor Luminous Environment Preference

    외부 날씨 경험이 실내 조명환경 선호도에 미치는 영향에 관한 기초 연구

    Seo, Ji-Young, Choi, An-Seop

    서지영, 최안섭

    The indoor luminous environment that varies with the weather conditions affects the changes in residents’ emotions. However, when using weather information in ... + READ MORE
    The indoor luminous environment that varies with the weather conditions affects the changes in residents’ emotions. However, when using weather information in buildings, residents’ emotional changes due to weather are not considered, but only energy saving potential. Therefore, in this paper we controlled the indoor luminous environments, correlated color temperature (CCT) (3500, 400 and 6500 K) and illuminance (300, 600 and 900 lx), to analyse the residents’ emotional states and to provide appropriate indoor illuminance and CCT. The experiments revealed that the average positive emotion was increased by 19% when the sky condition was overcast provided with the illuminance of 900 lx and the CCT of 4500 K. The negative emotion was decreased by 17% when the sky condition was clear, overcast provided with the illuminance of 600 lx and the CCT of 3500 K. On the other hand, with a illuminance of 300 lx, positive emotion at all CCT were reduced by an average of 22.25%. - COLLAPSE
    October 2020
  • Research Article

    Examining the Certification Characteristics and Results of Multi-Unit Dwellings following Revisions to G-SEED Criteria

    녹색건축 인증기준 개정에 따른 공동주택 인증결과 및 특성 분석

    Bae, Cheol-Hak, Choi, Dong-Ho

    배철학, 최동호

    This study aims to compare the certification status and score ratings of multi-unit dwellings before and after updating the certification status from ... + READ MORE
    This study aims to compare the certification status and score ratings of multi-unit dwellings before and after updating the certification status from G-SEED 2013 to G-SEED 2016. We aim to deduce ways to improve the certification criteria by examining green building certification documents certified by the Korea Appraisal Board. We hope to use these insights to inform decisions on future green building certification criteria. The findings from this study are as follows. (1) Transitioning from G-SEED 2013 to G-SEED 2016 changed the stringency of the certification criteria so that less buildings were eligible for high-tier certifications (Green Class I, Green Class II), while the number of buildings certified with lower-tier certifications (Green Class III, Green Class IV) increased. (2) The categories for which scores could have been earned by request from the applicant decreased from four in G-SEED 2013 to two in G-SEED 2016. (3) It was noted from the certification results of G-SEED 2016 that for three categories (maintenance, ecological environment, and indoor environment), there were only small differences between the eligibility criteria for the different certification levels, which led to one specific certification level being highly represented. - COLLAPSE
    October 2020
  • Research Article

    A Study on the Control Method for Hybrid Dehumidification System Using Thermoelectric Element Based on Indoor Thermal Environment

    실내온열환경 기반의 열전소자 하이브리드 제습시스템 제어방안에 관한 연구

    Yeom, Ho-Jin, Lee, Hyun-Je, Song, Han-Sol, Ryu, Seong-Ryong

    염호진, 이현제, 송한솔, 류성룡

    Based on our previous research for the composition of hybrid dehumidification system using thermoelectric element, we performed the performance experiment and draw ... + READ MORE
    Based on our previous research for the composition of hybrid dehumidification system using thermoelectric element, we performed the performance experiment and draw the control method for hybrid dehumidification system in this study. This system consists of the cooling dehumidification method using a thermoelectric element and the chemical dehumidification method using Super Desiccant Polymer. Three condition cases by indoor thermal environment were tested: in high temperature-high humidity, in middle temperature-high humidity, and in low temperature-high humidity. Through these experimental results, we proposed the control algorithm to effectively control the local moisture in the interior space. - COLLAPSE
    October 2020
  • Research Article

    Analysis of Heart Rate Variability of Human Body based on the Subject Experiments in Different Urban Thermal Environments during Summer

    피험자 실험을 통한 하절기 도심지 온열환경 조건에서 인체의 심박변이도 분석

    Lim, Jae-Han

    임재한

    The urban thermal environment has been deteriorating these days due to global climate change and the occurrence of heat-related illness have emerged ... + READ MORE
    The urban thermal environment has been deteriorating these days due to global climate change and the occurrence of heat-related illness have emerged as the major social problems. This study is aimed to analyze the Heart rate variability (HRV) of human body based on the subject experiments in different urban thermal environments during summer. We measured the environmental conditions by PMV meter and thermal imaging camera. During the subject experiments, the measured R-R interval data by heart rate sensor (Polar H10) in two-minute interval were used for the analysis of HRV. LF/HF ratio was used for the HRV evaluation. Two subjects were tested in different environment conditions during summer. We analyzed the correlation between the urban thermal environment and HRV of human body. Statistically F-test and T-test were performed at 95% of the confidence intervals to see if the comparison of the data is significant. Given the differences between indoor and outdoor thermal environments, there was a significant difference in the HRV values . The variable that has a significant impact on the outdoor environment seems to be the sensitivity of the subject individual to environmental changes. The results showed that the direct solar incidence to persons or variation in the pavement material was not significant within a limited range of outdoor environmental conditions (2≦PMV≦3). - COLLAPSE
    October 2020
Journal Informaiton Journal of Korean Institute of Architectural Sustainable Environment and Building Systems Journal of Korean Institute of Architectural Sustainable Environment and Building Systems
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