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ECO2를 이용한 노후 공공 건축물 에너지 성능평가 시 주요 입력변수의 영향도 분석
변지연(Ji Yeon Byun),송두삼(Doo Sam Song) 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.11
For achieving carbon-neutrality in building sector, retrofit for old buildings is crucial. Accordingly, a green-remodeling or green-retrofit to improve the energy performance of old public building is in progress in Korea. The energy saving effect through domestic green remodeling is evaluated using the Building Energy Efficiency Rating Certification Evaluation Program (ECO2). Various input data are required for ECO2 energy performance evaluation, and an error in the input value greatly affects the energy performance evaluation result. The energy use intensity of the last years green remodeling projects showed a large deviation despite similar uses, structures, and locations. The aims of this study is to evaluate the impact of the input variables on energy performance using the ECO2 program. The main input variables that cause large deviations on the result of the building energy performance are analyzed. The results showed that the window U-vlaue and the wall U-vlaue were found to have the greatest influence on the results. In order to reduce the deviation of the results, it seems that a follow-up study on the appropriate input values of the window U-vlaue and the wall U-vlaue
변지연(Ji Yeon Byun),박소민(So Min Park),심지수(Ji Soo Shim),송두삼(Doo Sam Song) 대한설비공학회 2021 대한설비공학회 학술발표대회논문집 Vol.2021 No.6
Thermal performance of building envelope, especially thermal transmittance of wall affects the heating and cooling load. There are methods to measure the thermal transmittance of wall, HFM, ASTR, and IRT Method. HFM Method(ISO 9869-1) is widely used and know to be the most reliable method. This method is prescribed to be measured by the North for at least 3 days to exclude the effects of solar radiation. However, in actual building conditions, there are cases where it is unavoidable to measure the south wall. Therefore, data processing to correct the measured result is required, and the data is averaged and the length of measured period is decided by convergence of data. The aims of this study is to analyze the effect of solar radiation on in-situ measurement results of thermal transmittance of building envelope. Minimum measurement period to determine wall transmittance of South wall is analyzed. The results showed that the south wall showed a large fluctuation in the heat flux due to the solar radiation compared to the north. All the conditions for convergence were satisfied after five days for the north wall, while it is need to measure more than 10 days for the south wall. It is difficult to produce reliable results during the minimum required period (3 days).
노후 건물의 에너지 성능 분석에서 경년변화와 환경요인을 고려한 열관류율의 가중계수 제안
변지연(Ji Yeon Byun),박소민(So Min Park),송두삼(Doo Sam Song) 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.6
The aims of this study is to propose the weighting factor of building thermal transmittance considering the elapsed year and building conditions. This method can relatively accurately predict the heat flow rate of the old building envelope by visual observation alone. Based on the on-site measurement of the thermal transmittance(Heat Flux Method) for a total of 39 old buildings, a weighting factor to correct the thermal transmittance by visual inspection was calculated. As a result of a regression analysis between the measured thermal transmittance and designed value, the type of exterior wall finishing material, color, and ambient climatic conditions actually affected the deterioration of the thermal performance of the wall.
변지연 ( Ji Yeon Byun ),김소영 ( So Young Kim ),김성현 ( Seong Hyun Kim ),최혜영 ( Hae Young Choi ),명기범 ( Ki Bum Myung ),최유원 ( You Won Choi ) 대한피부과학회 2007 대한피부과학회지 Vol.45 No.5
Cellular schwannoma, a variant of schwannoma, is a rare, benign, nerve sheath tumor which presents as a slowlygrowing tumor in the paravertebral region of the mediastinum and retroperitoneum in middle-aged adults. Cutaneous involvement is very rare. Histopathologically, the tumor is characterized by the presence of compact spindle cells arranged into fascicles, variable nuclear hyperchromasia and pleomorphism, lack of Verocay bodies and typical predominence of Antoni A areas. There may also be occasional increased mitoses and foci of necrosis. We report a case of cellular schwannoma involving subcutaneous tissue, which is a very rare location. (Korean J Dermatol 2007;45(5):465~467)
노후 건물의 에너지 성능 분석에서 경년변화와 환경요인을 고려한 열관류율의 가중계수 제안
변지연(Ji Yeon Byun),박소민(So Min Park),송두삼(Doo Sam Song) 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.6
The aims of this study is to propose the weighting factor of building thermal transmittance considering the elapsed year and building conditions. This method can relatively accurately predict the heat flow rate of the old building envelope by visual observation alone. Based on the on-site measurement of the thermal transmittance(Heat Flux Method) for a total of 39 old buildings, a weighting factor to correct the thermal transmittance by visual inspection was calculated. As a result of a regression analysis between the measured thermal transmittance and designed value, the type of exterior wall finishing material, color, and ambient climatic conditions actually affected the deterioration of the thermal performance of the wall.
노후 건물의 에너지 성능 분석에서 경년변화와 환경요인을 고려한 열관류율의 가중계수 제안
변지연(Ji Yeon Byun),박소민(So Min Park),송두삼(Doo Sam Song) 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.6
The aims of this study is to propose the weighting factor of building thermal transmittance considering the elapsed year and building conditions. This method can relatively accurately predict the heat flow rate of the old building envelope by visual observation alone. Based on the on-site measurement of the thermal transmittance(Heat Flux Method) for a total of 39 old buildings, a weighting factor to correct the thermal transmittance by visual inspection was calculated. As a result of a regression analysis between the measured thermal transmittance and designed value, the type of exterior wall finishing material, color, and ambient climatic conditions actually affected the deterioration of the thermal performance of the wall.