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가열탱크 내부 스크류 회전속도에 따른 전기보일러의 열성능에 관한 연구
금종수(Jong-Soo Kum),김동규(Dong-Gyu Kim),박종일(Jong-Il Park) 한국지열·수열에너지학회 2015 한국지열에너지학회논문집 Vol.11 No.3
This study was aimed at the heating tank with a screw-rotation device for improving the thermal efficiency of electric boiler. In the proposed system, analysis items were the heater rod surface temperature variation, reaching time for set temperature and thermal efficiency. The following conclusions are obtained from this experimental study. (1) When screw speed increases, the time reaching for set temperature tended to be shorter. (2) When the rotation speed becomes 300 rpm, the surface temperature difference between the right and left heater rod decreases by 49%, from 19.7℃ to 9.7℃ in average. (3) When the rotation speed is over 250 rpm, proposed heating tank structure appeared to be effective in terms of thermal efficiency. Thermal efficiency with the rotation speed 300 rpm is improved by 3.8% compared to the case of rotation speed 0 rpm.
변동환경 대응을 위한 난방 시스템의 쾌적 알고리즘 개발
금종수(Jong-Soo Kum),김형철(Hyung-Chol Kim),김종렬(Jong-Ryeol Kim) 한국생활환경학회 2006 한국생활환경학회지 Vol.13 No.3
People of modem society spend 60~70% of their time of a day staying indoors. As the importance of indoor life increases, needs for thermal-comfort has also been raised. So far, many researches on thermal comfort by controlling thermal environmental factors have been done, and studies on sound, fragrance, color, and air quality have been actively carried out by adopting emotional methods. With these research results, methods of climate control have facilitated emotional controls, that is the adoption of emotional methods to thermal environmental factors. In this study, human bodies' thermal comfort and emotions in winter heating system are evaluated. Average heating degree range is from 18℃ to 20℃, but many places actually keep their indoors heated at 24~26℃. This study aimed to demonstrate the effect of saving energy by changes of images, which are a major influence for people to heat their indoors at 24~26℃.
여름철 수면시 온열쾌적감 평가 : 제4보 : 쾌적수면을 위한 실내온도 설정에 관한 연구
금종수(Jong-Soo Kum),김동규(Dong-Gyu Kim),박종일(Jong-Il Park) 대한설비공학회 2007 설비공학 논문집 Vol.19 No.4
This study was performed to evaluate sleep efficiencies and conditions for comfortable sleep based on the analysis of sleep efficiency and MST under four thermals conditions (22℃, 24℃, 26℃, 30℃). Five female subjects who have similar life cycle and sleep patterns were participated for the sleep experiment. Their age was from 20 to 22 years old. They were healthy, and had regular sleep with consistent bed and wakeup time. It was checked whether they had a good sleep before the night of experiment. Experiments were performed in an environmental chamber using thermo-hygrostat. The physiological signal (EEG) for sleep stage were obtained from C3-A2 and C4-A1 electrode sites. Sleep stages were classified, then SWS latency and SWS/TST were calculated for the evaluation for sleep efficiencies on thermal conditions. As results, mean skin temperature for comfort sleeping was 34.5 ~ 35.4℃. Considering sleep efficiency and mean skin temperature, indoor room temperature of upper limit was 28.1 ℃.
금종수(Jong-Soo Kum),김동규(Dong-Gyu Kim),조관식(Kwan-Sik Cho),최호선(Ho-Sun Choi),정용현(Yong-Hyun Chung) 한국생활환경학회 2000 한국생활환경학회지 Vol.7 No.2
Satisfaction with the environment is composed of many components, of which the most important factor is thermal comfort. Specifically, it is the interaction of environmental variables (i.e., air temperature, mean radiant temperature, humidity and air speed) with the occupant's personal variables (i.e., metabolic rate and clothing). Thermal comfort environment is necessary to define psychological and physical responses. In laboratory situations, the steady state is a common factor of the environment, but some of its effect on active state levels are still unknown. The paper reports the results of a series of domestic working experiments by running machine and compares them with the results of sedentary experiments.
금종수(Jong-Soo Kum),김동규(Dong-Gyu Kim) 대한설비공학회 2008 설비공학 논문집 Vol.20 No.12
The study was to evaluate the air-conditioning of sleep algorithm. The algorithm was developed through the analysis of brain waves and MST, the experiments using air conditioner was performed in a apartment bedroom. Five female subjects were participated for the experiment. Eight hours of data collection a day was performed under different algorithm, case A, case B and case C. Physiological signals, EEG, ECG, EOG, and EMG, were obtained using polygraph and converted into digital signal. Then, subjects were asked to answer the questionnaire about their thermal sensation after experiment in bedroom. Sleep stages were classified, then TST, Sleep latency and Sleep efficiency were calculated for the three different air conditioner algorithm. As results, TST, Sleep efficiency, questionnaire showed the higher values for Case B algorism than that for other algorism. On the other hand, SWS latency was lower than for other conditions. Therefore, it was concluded that Case B of the algorithm was the best for comfortable and deep sleep.
금종수(Jong-Soo Kum),김동규(Dong-Gyu Kim),서정섭(Jeong-Seop Seo),장은영(Eun-Young Jang),이상호(Sang-Ho Lee) 대한설비공학회 2009 대한설비공학회 학술발표대회논문집 Vol.2009 No.-
Photo-catalyst technology to the decomposition of formaldehyde, and many are capable of VOC. In this research, effects of screw type photo-catalyst device will announce the experimental results.