http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
김재돌,윤정인,통구 김차랑,Kim, J.D.,Yoon, J.I.,Higuchi, K. 대한설비공학회 1996 설비공학 논문집 Vol.8 No.3
The dynamic characteristics of a condenser are numerically studied for the control of air-conditioning systems. The important factors, such as the refrigerant flow rate and refrigerant temperature, air velocity and air temperature at the condenser inlet, are incorporated into the analysis. This study was focused on the analysis of dynamic responses by transfer function method in the condenser. Block diagrams were made through analytic transfer function, and dynamic responses are evaluated on Bode diagrams in the frequency response. These results may be used for determining an optimum design parameters in an actual component and total systems. Also, the mathematical models, frequency response and steady state response may be used to increase understanding, to obtain useful information for its commercialization, to evaluate the hardware and the optimum design parameters, the design control system and to determine the best controller setting for the refrigeration and air conditioning systems.
열교환기 파울링 자동 제거장치 최적화를 위한 세정 볼 실험에 관한 연구
김재돌(J. D. Kim),설원실(W. S. Seol) 한국동력기계공학회 2009 한국동력기계공학회 학술대회 논문집 Vol.2009 No.6
The experiment was performed to optimize cleaning effect on heat exchanger for optimizing fouling auto removal apparatus using cleaning ball. Through this study we got the following results. Lattice space of ball separator is allowed 6∼10.3mm in ranges of ball diameter are 15∼25mm and when mass flow of cooling water is 3.0m/sec. We limit the range of velocity of flow 1.4∼2.6m/sec into ball separator to decide the mass flow of ball circulation pump. Balls were inputted immediately in case of velocities of flow are 2.4 and 2.6m/sec, balls were inputted smoothly in case of velocities of flow are 2:0 and 2.2m/sec, balls were inputted slowly, but they were not inputted less than 1.8m/s in case of velocities of flow are 1.8m/sec. when the velocity of flow is constant, pass time is decreased as a decreasing of cleaning ball diameter. When velocity of flow is 2.4m/sec, maximum ball diameter is 21.0mm in case of 17mm inner diameter. Average of pass time of balls is 1.15∼2.79sec depend on the velocity of flow and the size of balls. As a result, an auto fouling elimination system using cleaning ball was more effective than existing mechanically cleaning system in the visual.
에젝터를 이용한 다관식 열교환기 자동세정장치의 구동특성에 관한 실험적 연구
김재돌(J. D Kim) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.5
The experiment was performed to check operation characteristics of automatic cleaning apparatus for multi pass heat exchanger using ejector. The results showed as following with respect to operation pattern such as ball input and collection time. The ejector suction flow rate increased as the head of operating pump of ejector. Proper suction flow rate showed 7.2~10.2㎥/h for ball collection in case of pump head 35~50m. The head of ejector outlet pipe is below 4.1m in case of 40m, the head of operating pump of ejector to confirm ejector suction flow rate 8.4㎥/h. The head of ejector outlet pipe needs to be below 7m in case of 40m, the head of operating pump of ejector. The pressure of suction chamber decreased as the head of operating pump of ejector.
김재돌(J. D. Kim),이호생(H. S. Lee),윤정인(J. I. Yoon),홍정희(J. H. Hong),조명환(M. H. Cho) 한국마린엔지니어링학회 2006 한국마린엔지니어링학회 학술대회 논문집 Vol.2006 No.-
The paper deals with the characteristics of vacuum freezing equipment for dry flower. The equipment needs to be operated by the technology related with super low temperature, high vacuum, dry. The vacuum freezing equipment used in this experiment consists of the super low temperature part, high vacuum measurement part and hot gas supplier. The temperature in the chamber, cold trap and hot gas injection was changed as -25~-45℃, -45~-60℃, -10~-20℃, respectively. The time which reach to the steady state increased as the temperature in the chamber and cold trap. The operating characteristics of main part of experimental apparatus was changed according to the condition variation. Also, the condition of flower such as size and color after dry was superior comparing with natural dry.
급속 진공 동결 건조에 의한 드라이플라워 및 장치 특성 평가
김재돌(J. D. Kim),박일수(I. S. Park),윤정인(J. I. Yoon) 한국동력기계공학회 2007 한국동력기계공학회 학술대회 논문집 Vol.- No.-
The paper deals with the characteristics of dry flower and equipment by vacuum freezing dryer. The equipment needs to be operated by the technology related with super low temperature, high vacuum and dry. The vacuum freezing equipment used in this experiment consists of the super low temperature part, high vacuum measurement part and hot gas supplier. The temperature in the chamber, cold trap and hot gas injection was set as -30℃, -50℃ and -15℃. The time which reach to the steady state increased as the temperature in the chamber and cold trap. The operating characteristics of main part of experimental apparatus was changed according to the condition variation. Also, the condition of flower such as size and color after dry was superior comparing with natural dry.