http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
상변화물질(PCM)을 이용한 열교환기용 동파방지밸브에 관한 실험적 연구
윤재호(Yun, Jea-ho),김종하(Kim, Joung-ha),정순영(Jeong, Soon-young),양윤섭(Yang, Yoon-sub),김성현(Kim, Seong-Hyun),송덕용(Song, Duk-yong) 한국태양에너지학회 2012 한국태양에너지학회 논문집 Vol.32 No.6
This paper is an experimental study on the freezing protection valve used for solar water heating, air-conditioning systems, and plumbing systems. When the phase change occurs from liquidto solid, most of the substances except water volumetrically shrink. And referred to as PCM(Phase Change Material)a substance with such properties, the phase change temperature varies depending on the material. To prevent the freezing of the plumbing system, such as air-conditioning system in the winter season, we developed a several types of freezing protection valve using PCM whose freezing temperature are 2-4℃. The working principle of the freezing protection valve is that the fluid inside the pipe is released to prevent the system-collapse when fluid temperature reaches the freezing temperature of the PCM. And then the valve is closed and returned to the original position automatically when the temperature of the operating fluidrises. In this paper, the operating temperatures, discharge flow rate and the response characteristics of the valve during the operation are tested and investigated. From the results of this research the freezing protection valves employing PCM are expected to be commercialized in the near future.
상변화물질(PCM)을 이용한 공기조화 시스템용 동파방지밸브에 관한 실험적 연구
정순영(Jeong, Soon-young),윤재호(Yun, Jea-ho),김종하(Kim, Joung-ha),양윤섭(Yang, Yoon-sub),김성현(Kim, Seong-Hyun),송덕용(Song, Duk-yong) 한국태양에너지학회 2012 한국태양에너지학회 학술대회논문집 Vol.2012 No.11
This paper is an experimental study on the freezing protection valve used for solar water heating, air-conditioning systems, and plumbing systems. When the phase change occurs from liquid to solid, most of the substances except water volumetrically shrink. And referred to as PCM(Phase Change Material) a substance with such properties, the phase change temperature varies depending on the material. To prevent the freezing of the plumbing system, such as air-conditioning system in the winter season, we developed a several types of freezing protection valve using PCM whose freezing temperature are 2-4℃. The working principle of the freezing protection valve is that the fluid inside the pipe is released to prevent the system-collapse when fluid temperature reaches the freezing temperature of the PCM. And then the valve is closed and returned to the original position automatically when the temperature of the operating fluid rises. In this paper, the operating temperatures, discharge flow rate and the response characteristics of the valve during the operation are tested and investigated. From the results of this research the freezing protection valves employing PCM are expected to be commercialized in the near future.
공압구동형 슬러리아이스 제빙기의 제빙특성에 관한 실험적 고찰
김민준(Min-Jun Kim),김종하(Joung-Ha Kim),윤재호(Jae-Ho Yun),권오경(Oh-Kyung Kwon),이규칠(Kyu-Chil Lee),박일환(Il-Hwan Park),양윤섭(Yun-Sub Yang) 한국태양에너지학회 2006 한국태양에너지학회 학술대회논문집 Vol.- No.-
In this study, ice making characteristics are experimentally investigated for the ice slurry generating system which is pneumatically operated. The ice slurry generator has the same shape as the shell-and-tube type heat exchanger. Refrigerant is flowing in the shell side and ethylene glycol solution in the tube side. The experimentations are conducted under the various test conditions such as aqueous solution concentration, flow rate of solution and frequency of cylinder stroke. For the above experimental conditions, ice making characteristics of the slurry ice generating system are evaluated in terms of the overall heat transfer coefficient and the amount of slurry ice generation. And the experimental results show that the heat transfer rate of the system is increased as the flow rate of aqueous solution increases and the concentration of ethylene glycol decreases.