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신유식(You-Sik Shin),배강열(Kang-Youl Bae),배철환(Chul-Whan Bea),이윤환(Youn-Hwan Lee),정효민(Hyo-Min Jeong),정한식(Han-Shik Chung) 대한기계학회 2002 대한기계학회 춘추학술대회 Vol.2002 No.5
This paper is the study on the performance of cooling tower system by using the low vacuum. Currently, the cooling system is using at many parts of the industry. But, the present system have many problems for the cooling process. Thus, This research aimed for replacing the present cooling<br/> tower system. This new cooling tower system have a low vacuum, and have a ejector system to maintain a low pressure. As a main experimental parameter, we introduced a flowrate at the inlet ejector system.
김세현(Se-Hyun Kim),신유식(You-Sik Shin),배강열(Kang-Youl Bae),이윤환(Youn-Whan Lee),정효민(Hyo-Min Jeong),정한식(Han-Shik Chung) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.11
The general cooling tower is a device for making a cooling water in refrigerant condensers or industrial process heat exchangers. The present cooling tower have defects with noises, complicated structure and environmental problems. <br/> In this paper, we constituted a new water cooling system by using a evaporating latent heat in an enclosed tank. and this system is consisted of an enclosed vacuum tank water driving ejector system. Several experimental cases were carried out for improvement methods of high vacuum pressure and water cooling characteristies. The ejector performance was tested in case of water temperature variation that flow in the ejector. Based on the vacuum pressure by water driving enjector, the water cooling characteristies were investigetesd for the vaporized air condensing effcts.
증기 구동식 진공 시스템을 이용한 해수 냉각 특성에 관한 실험적 연구
최민식(Min-Sik Choi),金鎭花(Zhen-Hua Jin),신유식(You-Sik Shin),정효민(Hyo-Min Jeong),정한식(Han-Shik Chung),배태열(Tae-Yeol Bae) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.11
A steam ejector is a device which is used to transport vapor or liquid at low pressure to a higher pressure or to make vacuum as its simplicity and reliability. It is widely used in refrigeration system, power system and food industry etc. This study showed the water cooling system by using a steam ejector to drop water temperature by about 5℃ from 25℃ or higher. In this study, to replace the present water cooling system, we focused on a water cooling system operated by the latent heat of evaporation, thus this system needs a vacuum pressure to evaporate the water in enclosed tank. The water cooling effects are depended on the vacuum pressure in the enclosed tank, and the cooling water is generated by the latent heat of evaporation. As the experimental results, the absolute vacuum pressure was obtained about 8~12㎜Hg by using a steam ejector. The necessary time to reach this vacuum pressure was about 5minutes and the temperature difference of the water were obtained about 5℃.