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복사 장치를 이용한 온도와 형상계수의 변화에 따른 방사율에 관한 실험적 연구
김청래,정병철,강형석 강원대학교 산업기술연구소 2005 産業技術硏究 Vol.25 No.B
Voltage of radiometer is measured experimentally using the radiation apparatus in each case of iron- and copper-plates as specimen heating device. The length between radiometer and conical shield and the temperature of specimen heating device are considered as variables. The length between radiometer and conical shield controls the amount of radiation from the specimen heating device. Emissivity for both iron-and copper-plates are calculated by using Stefan-Boltzmann equation. One of results shows that emissivity for both materials increases as the length between radiometer and conical shield increase.
용민철(Minchul Yong),이권재(Kwonjae Lee),김청래(Cheongrae Kim),박찬정(Chanjung Park) 대한기계학회 2018 대한기계학회 춘추학술대회 Vol.2018 No.12
The human desire to drink clean water is increasing more and more. Todays, the market for direct water purifiers are increasing, not purifiered tank water. In recent years, the development of a cooling system has been actively conducted to make the purified water immediately drinkable. This paper is a more effective and efficient improvement of the ice storage cooling system that was conducted in 2017, and it deals with the study of optimizing the heat exchange between the ice storage and purifiered water.
분사노즐을 이용한 빙축수 순환방식과 주름관을 이용한 빙축열 냉각 시스템 구현
용민철(Minchul Yong),예병효(Byunghyo Ye),김청래(Cheongrae Kim),박찬정(Chanjung Park) 대한기계학회 2017 대한기계학회 춘추학술대회 Vol.2017 No.11
With the introduction of direct water purification system in water purifier, the necessity of cold water using instantaneous cooling method is emerging. The ice storage system was used in this study as a method of cooling purified water to below 10℃ through a filter. The circulation of the cooling water inside ice storage system was optimized by using the injection nozzle. A corrugated SUS tube was used to increase the cooling efficiency making cold water. Using the above technique, we developed a direct water purifier capable of realizing the lowest temperature.