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R141b 포접화합물을 이용한 축냉시스템의 성능에 관한 실험적 연구
정인성,김양규,이준식,노승탁,Jung, I.S.,Kim, Y.G.,Lee, J.S.,Ro, S.T. 대한설비공학회 1994 설비공학 논문집 Vol.6 No.4
Experiments have carried out to investigate the effects of parameters, such as mass ratio of R141b-to-water, stirrer speed, brine inlet temperature, brine flowrate, and additives, on the performance of the cool storage system using R141b clathrate. The cool storage system in this experiment was composed of storage tank, refrigerator, and heater. The results show that the mass ratio of R141b-to-water, 1 : 3~1 : 3.5 gives the best performance and the stirring speed has optimum point as 600rpm. At this speed impeller Reynolds number is $1.01{\times}10^5$. The lower the inlet brine temperature and the highter the brine flowrate, the better performance. The addition of metal powder turned out to reduce the degree of supercooling. The supercooling reduction was proportional to the amount of the metal power. However when metal powder was added more than 0.1 wt%, there was no additional supercooling reduction. The surfactants shortened the time consumed for cool storage to the half of no surfactant added case.
정인화(I.W.Jeong),임근희(G.H.Rim),김종수(J.S.Kim),이현정(H.J.Lee),이홍식(H.S.Lee) 전력전자학회 2002 전력전자학술대회 논문집 Vol.- No.-
본 논문에서는 최근 개발된 250W 고압나트륨 램프용 전자식 안정기의 구성과 동작특성을 다양한 실험을 통해 기존 자기식 안정기와 비교하였다. 이를 통해 전자식 안정기의 향상된 광효율 특성과 개선된 역률. THD 등과 같은 전기적 특성을 확인할 수 있었다.