• Research Article

    A Preliminary Study on Chamber-Based Performance Evaluation according to Indoor and Outdoor Application of Wall System Applied with Phase Change Material

    상변화물질 적용 벽체시스템의 실내외적용에 따른 챔버기반 성능평가 예비연구

    Lee, Ki-Chul, Park, Chang-Young, Lee, Keon-Ho, Lee, Gong-Hee

    이기철, 박창영, 이건호, 이공희

    A PCM is a substance that stores or releases heat through the physical transition process from solid to liquid state to liquid … + READ MORE
    A PCM is a substance that stores or releases heat through the physical transition process from solid to liquid state to liquid to solid state. Due to the high heat capacity using latent heat and the Time-Lag phenomenon, heat transfer of the structure is slowed down, and in the process of accumulating and releasing latent heat, the energy saving effect of the building and the effect of reducing the peak load can be expected. In particular, PCM has the advantage that it can be used semi-permanently with passive technology that can prevent sudden changes in room temperature without active elements, and much research is underway to apply it to building materials. Therefore, in this research, we developed a composite panel Prototype in which PCM applied to the wall surface of an existing building with an appropriate phase change temperature applied, and verified the time rack effect depending on the mounting position of the PCM composite panel Prototype through a chamber experiment. - COLLAPSE
    30 June 2022
  • Research Article

    Annual Natural Ventilation Rates and Heat and Cooling Load in Relation to Occupant’s Window Opening Behavior in Residential Building

    공동주택 거주자들의 창문개방행위에 따른 연간 자연환기량 분포와 환기부하에 관한 연구

    Yoo, Ji-Hyun, Park, Jun-Seok

    유지현, 박준석

    Recently, due to sick house syndrome, the importance of indoor air quality is emerging. The method of managing the indoor air quality … + READ MORE
    Recently, due to sick house syndrome, the importance of indoor air quality is emerging. The method of managing the indoor air quality includes mechanical ventilation and natural ventilation. However, the majority of occupants prefer using natural ventilation rather than mechanical ventilation and even don’t know the existence of mandatory mechanical ventilation in residential building. Therefore, recent studies have focused on natural ventilation, which can easily manage the indoor air quality, and propose a ventilation guideline by developing a ventilation module due to the opening of the window. However, hot and cold outdoor air through the window opening affects the indoor temperature, which in turn has a big impact on energy consumption. Previous studies researched the window opening behavior (opening frequency and hours) with outdoor factors and found that the outdoor temperature had the greatest effect on window opening behavior. However, with this only window opening behavior, we couldn’t predict the precise energy consumption and couldn’t purpose the natural ventilation guideline because we don’t know the accurate volume of the outdoor air comes into the building. Therefore, in this study, field measurement is conducted for 4 complexes and 30 samples. we analyze the window opening behavior as same as previous study and the ventilation rates through carbon dioxide decay method. As a result, the measurement period could represent the outdoor temperature of korea. However, despite that outdoor temperature was similar, the distribution of indoor temperature was different by all the samples, especially in heating period. The window opening behavior and ventilation rates have correlation with outdoor temperature. The ventilation load was low in heating period, because of the lack of ventilation behavior. In contrast, the ventilation load in cooling period was greater than that in heating period. - COLLAPSE
    30 June 2022
  • Research Article

    Analysis of Comfort Temperature according to Type of Thermal Sensitivity of Office building Occupants

    오피스 건물 내 재실자의 열적 민감도 유형에 따른 쾌적 온도 분석

    Kim, Sung-Kyung, Ryu, Ji-Hye, Hong, Won-Hwa

    김성경, 류지혜, 홍원화

    This study identified occupant groups according to the thermal sensitivity of occupants in the office through clustering. Next, the comfortable temperature based … + READ MORE
    This study identified occupant groups according to the thermal sensitivity of occupants in the office through clustering. Next, the comfortable temperature based on the occupant’s thermal sensation was derived according to the type of thermal sensitivity group. The purpose of this study is to understand the characteristics of thermal comfort according to the thermal sensitivity level of occupants. As a result of clustering, thermal sensitivity of occupants was divided into 5 clusters. The comfortable temperature of each of these divided clusters was derived, and the differentiated results were calculated from a minimum of 22.8°C to a maximum of 24.9°C. If this is applied as an air conditioning control standard, it can contribute to maintaining and improving the thermal comfort of office occupants, and at the same time, it will be possible to develop an energy saving scenario. - COLLAPSE
    30 June 2022
  • Research Article

    An Energy Consumption Pattern Analyses in Apartment Household Using Dimensionless Number

    무차원 계수를 활용한 공동주택의 거주원수별 에너지 소비 패턴 분석

    Yoo, Jung-Hyun, Bang, Sun-Kyu

    유정현, 방선규

    The purpose of this study is to analyze the energy consumption characteristics of single-person household complexes and 3-4-person households. Specifically, in order … + READ MORE
    The purpose of this study is to analyze the energy consumption characteristics of single-person household complexes and 3-4-person households. Specifically, in order to minimize the effect of the difference in household size and number of residences, the actual energy consumption was processed into dimensionless numbers to check the consumption type and measure the similarity. The conclusions obtained from this study are summarized as follows: (1) First of all, this study proposed a dimensionless processing of energy consumption to minimize physical differences between comparison targets. Through this, it was possible to analyze the characteristics of energy consumption by time scale regardless of the difference in size and number of households, but it was confirmed that there was a limit to implementing the actual consumption characteristic. (2) As a result of the analysis of energy consumption characteristics, single-person households showed a difference in the daily consumption change of households with 3-4, which means that the characteristics of the simultaneous use rate and base load are different. In particular, by time scale, the fluctuation in consumption of single-person households tended to be large, and the time scale during which maximum consumption occurred was also relatively large compared to general households. (3) The similarity of the type of heating consumption was calculated 50.8% .Which means that the effect of the difference in the number of household members was relatively small. However, the consumption of power and hot water consumption were 7.1% and 7.8%, respectively, and it was analyzed that the consumption characteristics of single-person households and households with 3-4 people differed significantly. - COLLAPSE
    30 June 2022
  • Research Article

    Evaluation of Cooling Capacity of Radiant Cooling Panel Integrated with Light Shelf Function

    광선반 기능이 결합된 복사냉방 패널의 냉방용량 평가

    Rhee, Kyu-Nam, Park, Jong-Ho, Kim, Sang-Yeop, Jung, Gun-Joo

    이규남, 박종호, 김상엽, 정근주

    The present study was conducted to evaluate the cooling capacity of a thermally activated light shelf (TALS), which can be regarded as … + READ MORE
    The present study was conducted to evaluate the cooling capacity of a thermally activated light shelf (TALS), which can be regarded as radiant cooling panel integrated with light shelf. A mock-up test chamber and Physibel simulation model were developed, considering that the upper and lower surfaces of TALS are exposed to room air and cooling load. Mock-up test results showed that the cooling capacity increases from 57.5 to 82 W/㎡ when the additional cooling load is applied to the upper surface of TALS. As the developed simulation model showed a good agreement with the experimental results, several simulations were performed to investigate the TALS cooling capacity under different cooling load and chilled water conditions. Cooling capacity was 56.1~98.3 W/㎡ while the temperature difference between room air and mean water temperature (Δθ) was 9.4~15.2 K. Further studies are suggested to achieve a sufficient cooling capacity of TALS without excessive temperature difference Δθ. - COLLAPSE
    30 June 2022
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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