SEOUL CHRONICLE - 서울도시건축박물관

조경찬 한국건축역사학회 2019 한국건축역사학회 학술발표대회논문집 Vol.2019 No.03

[프로젝트 리포트] 서울도시건축전시관

조경찬(Zoh, Kyung Chan) 대한건축학회 2019 建築 Vol.63 No.10

일본의 전통복식을 응용한 현대패션 디자인 -에도시대의 우키요에 ‘미인화’를 중심으로-

남슬아, 박준연, 이선경, 조경찬, 김지영 충북대학교 생활과학연구소 2019 생활과학연구논총 Vol.23 No.2

The purpose of this study is to look at the features seen in Ukiyo-e, to understand traditional Japanese costumes, and then to develop new, contemporary fashion designs using both as sources of creative inspiration. As a research method, literature was first reviewed on the social and cultural background of the Edo period and the characteristics of Ukiyo-e and beauty paintings. Then, 108 works were selected for the study by extracting Ukiyo-e artwork from websites and books. The analysis showed that broad collar and rounded sleeves were used frequently, as were plant patterns and geometric patterns. Reds and yellows were the most common colors. Obi most commonly featured geometric patterns, and yellow and red colors were used to show similarities or contrasting colors with Gosode. Based on the theoretical study and analysis, the design concept was set as “Knot” and two clothing items were produced. They were presented as flat design sketches using Adobe Illustrator CC. The works were designed by reinterpreting the characteristics and traditional patterns of paintings in Ukiyo-e and offering a modern take on the shape of the obi.

센서와 머신 러닝을 통한 교실 책상 면 조도 예측

김재근,조경찬,지형진,정서원,조대기 한국과학영재교육학회 2023 과학영재교육 Vol.15 No.1

The purpose of this study is to predict the desk illumination of the classroom using the results obtained through sensors that can measure the natural lighting environment, and to save energy by dimming the artificial lighting of the classroom. In addition, a theoretical equation for predicting desk illumination through sensor values was produced. However, the desk illumination measured through the theoretical formula had a disadvantage of 70% accuracy and could not consider the blinds in the classroom. Machine learning was conducted to solve these shortcomings. Since constructing a machine learning dataset through actual measurement has time and space limitations, a simulation was produced to construct a dataset. As a result of comparing the produced simulation and the measured value, there was an error within 5%, which was used as machine learning data. There are a total of 192 sets and 1,728 data of natural light sensor values and classroom desk illumination values measured by changing direction, blind use, season, and time through simulation. As a result of learning this through the XGBoost regression model, the simulation value showed an accuracy of 95.4%, and the actual measurement value showed an accuracy of 95.2%. In addition, as a result of predicting desk illumination by natural lighting in each season and calculating the lighting energy saving effect, it was found to have an energy saving effect of 13.0% in winter, 29.6% in spring and fall, and 40.7% in summer. 본 연구의 목적은 외부 조도 센서를 통해 교실의 책상 면 조도를 예측하는데 있다. 이를 위해 기존 태양추적센서와 다르게 구름 양 등을 고려 가능한 자연채광센서를 개발하고, 센서값을 통해 책상면 조도를 예측하는식을 제작하였다. 그러나 이론식을 통해 측정은 정확도가 70%이고, 블라인드를 고려하지 못하는 단점이 있었다. 이를 보완하기 위해 머신 러닝을 진행하였다. 실측을 통한 머신러닝 데이터셋 구성은 시공간상 제약이 있어 시뮬레이션을 제작하였다. 시뮬레이션 예상값과 실측의 평균 편차는 5% 이내였다. 교실의 향, 블라인드유무, 절기, 시간을 변화시키며 시뮬레이션한 센서와 책상면 조도 데이터는 총 192세트 1728개이다. 이를 머신러닝한 결과 시뮬레이션 데이터와 95.4%, 실측값과95.2%의 정확도를 보였다. 또한 교실에서 디밍이 가능한 시간을 찾아 에너지 절감효과를 계산한 결과 동지13.0%, 춘추분 29.6%, 하지 40.7%의 에너지 절감이 가능한 것으로 나타났다.

식품 제조기업의 FOM솔루션 기반 MES시스템 설계 및 개발 연구

손경섭(K. S. Son),조경찬(K. C. Cho),김재하(J. H. Kim),김수영(S. Y. Kim) 한국생산제조학회 2023 한국생산제조시스템학회 학술발표대회 논문집 Vol.2023 No.7

태양열 적용을 위한 소형 초임계 이산화탄소 실험설비 설계 및 평가

최훈동,소원호,이정민,조경찬,이권영 한국산학기술학회 2020 한국산학기술학회논문지 Vol.21 No.6

본 논문은 포항지역 태양광 데이터를 기반으로 태양열을 적용시켜 12kW의 소형 초임계 이산화탄소(s-CO2) 시험 루프의 설계와 실험 시설의 이론적 연구, 안정화 및 최적화를 통한 이산화탄소의 특성 연구에 초점을 맞추고 있다. 실험 시설의 열역학 사이클은 구성 요소의 한계로 인해 액체, 가스 및 초임계 CO2가 모두 존재하는 랭킨 사이클(임계점 순환 주기)이며, 펌프, 히터, 레귤레이터, 열교환기, 가스 부스터, 에어 컴프레서 등으로 구성된다. 현재 본 연구에서 제작된 12kW 소형 발전 시스템은 최고압력 12MPa 최고 온도 70°C의 조건에서 6.98%의 효율이 나타나도록 설계되었다. 본 실험 장치를 소형 Brayton cycle과 비교했을 때 약 2% 높은 효율을 가진다는 것을 이론적으로 확인하였고, 사이클 효율을 높이기 위해 최적의 터빈 입구 온도와 압력을 얻었으며, 이 조건에서 IHX(내부 열교환기)의 도입시 18.75%의 최대 효율을 기대할 수 있다는 결론을 도출하였다. 마지막으로, 실험 설비의 태양광 시뮬레이션 결과 5월에는 6.7%, 6월에는 6.26%의 효율로 태양열을 이용할 수 있음을 확인하였다. This paper focuses on the design of a 12-kW small-scale supercritical CO2 test loop. A theoretical study, stabilization, and optimization of carbon dioxide were carried out with the application of a solar heat source based on solar thermal data in Pohang. The thermodynamic cycle of the test facility is a Rankine cycle (transcritical cycle), which contains liquid, gas, and supercritical CO2. The system is designed to achieve 6.98% efficiency at a maximum pressure of 12 MPa and a maximum temperature of 70°C. In addition, the optimum turbine inlet temperature and pressure were calculated to increase the cycle efficiency, and the application of an internal heat exchanger (IHX) was simulated. It was found that the maximum efficiency increases to 18.75%. The simulation confirmed that the efficiency of the cycle is 6.7% in May and 6.26% in June.

노후화된 대학 건물의 단열성능 향상 실험 및 경제성 평가

이정민(Jeongmin Lee),소원호(Wonho So),조경찬(Kyungchan Cho),최동녁(Dongnyeok Choi),이권영(Kwon-yeong Lee) 한국산학기술학회 2020 한국산학기술학회논문지 Vol.21 No.8

본 연구는 노후화된 대학 건물의 내부 단열 성능 향상에 대한 것으로, 대학교 건물 내 재실자의 생산성을 높이고 노후화된 건물의 단열효과를 높이기 위해 진행됐다. 본 논문은 한동대학교 느헤미야홀 건물 내 오피스 재실자의 단열성능 향상에 대한 지속적인 요청에 응답하여 문제해결을 위해 진행된 연구라는 차별성을 가지고 있으며, 내부온도가 인접건물의 내부온도와 비교했을 때 낮음을 확인하여 연구 필요성에 대한 타당성을 검증하였다. 학교라는 건물의 특성을 고려해 내외부 단열 중 내부 단열을 주제로 단열재를 선택했다. 대학교 교수 오피스를 소형화시킨 모형 방을 만들어 시장에서 사용되는 내부 벽면 단열재를 설치해 실험을 진행했다. 실험 결과를 바탕으로 가열 시간과 실제 열전달 계수를 측정하여 단열효과를 분석하는 경제성 평가를 실시했다. 경제성 평가는 실험과 이론에 의해, 겨울철과 여름철 기준으로 각각 실시되었다. 연구결과, 느헤미야홀 60 개의 오피스에 아이소핑크(30 T)를 내 단열재로 도입하였을 때, 한 달에 겨울철에는 최대 총 1,071,600 원을 절약 할 수 있으며, 여름철에는 총 109,200 원을 절약할 수 있다. This study examined ways of improving the internal insulation performance of aging university buildings, and to enhance the convenience of occupants in university buildings and the insulation effect of aging buildings. This research was conducted to solve the problem of continuous requests for improving the insulation performance of office workers in the Nehemiah Hall building of Handong University. The results showed that the internal temperature of Nehemiah Hall was low compared to the internal temperature of the adjacent building. Considering the characteristics of the building, the university chose insulating materials under the theme of internal insulation. The experiment was conducted by installing internal wall insulation used in the market by producing a model room that miniaturized the university professor"s office. Based on the experimental results, an economic evaluation was conducted to analyze the insulation effect by measuring the heating time and actual heat transmission coefficient. An economic evaluation was conducted by experiment and theory and on a winter and summer basis. According to the research, when an Isopink (30 T) was introduced as an internal insulation material in 60 offices of Nehemiah Hall, it could save up to 1,071,600 won in total during the winter season and 109,200 won during the summer season.

일본의 전통복식을 응용한 현대패션 디자인 -에도시대의 우키요에 ‘미인화’를 중심으로-

남슬아(Nam, Seula),박준연(Park, Junyeon),이선경(Lee, Sunkyong),조경찬(Cho, Kyongchan),김지영(Kim, Jiyoung) 충북대학교 생활과학연구소 2019 생활과학연구논총 Vol.23 No.2

The purpose of this study is to look at the features seen in Ukiyo-e, to understand traditional Japanese costumes, and then to develop new, contemporary fashion designs using both as sources of creative inspiration. As a research method, literature was first reviewed on the social and cultural background of the Edo period and the characteristics of Ukiyo-e and beauty paintings. Then, 108 works were selected for the study by extracting Ukiyo-e artwork from websites and books. The analysis showed that broad collar and rounded sleeves were used frequently, as were plant patterns and geometric patterns. Reds and yellows were the most common colors. Obi most commonly featured geometric patterns, and yellow and red colors were used to show similarities or contrasting colors with Gosode. Based on the theoretical study and analysis, the design concept was set as “Knot” and two clothing items were produced. They were presented as flat design sketches using Adobe Illustrator CC. The works were designed by reinterpreting the characteristics and traditional patterns of paintings in Ukiyo-e and offering a modern take on the shape of the obi.

소형 초임계 이산화탄소 실험설비 평가 및 최적화

소원호(Won-Ho So),이정민(Jeong-Min Lee),조경찬(Kyung-Chan Cho),성주헌(Ju-Hun Sung),이재영(Jae-Young Lee),이권영(Kwon-Young Lee) 대한기계학회 2019 대한기계학회 춘추학술대회 Vol.2019 No.11

The paper focuses on design of a small-scale s-CO2 test loop of about 12㎾ with solar heat as a heat source and the characteristic study of carbon dioxide through theoretical research, stabilization and optimization of experimental facilities. The thermodynamic cycle of the experimental facility is a Rankine cycle (transcritical cycle) in which liquid, gas and supercritical CO2 all exist due to limitations on the component side. The components of the experimental equipment are typically made up of pump, heater, relief valve, cooler, gas booster, air compressor, chiller, etc. To raise the cycle efficiency of the experimental facility, the optimum turbine inlet temperature and pressure were obtained, and the maximum efficiency of 18.84% was derived by simulating the introduction of IHX (internal heat exchanger).