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실내분진의 비저항 특성에 따른 전기집진 효율에 대한 연구
정성일(Seong-Ir Cheong),안영철(Young-Chull Ahn),조상원(Sang-Won Cho),김홍석(Hong-Suk Kim),이재근(Jea-Keun Lee),강은철(Eun-Chull Kang),이의준(Euy-Joon Lee) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.5
Electrical resistivity is an important property for the collection efficiency in the electrostatic precipitator. In this paper, resistivities of tobacco dusts, yellow sand dusts and pine pollens are measured using a high voltage conductivity cell based on JIS B 9915. The resistivities of three kinds of indoor dusts are in the normal range of 10⁴~10¹? ohmㆍ㎝ and dust collection efficiency using an electrostatic precipitator at the face velocity of 1.0 ㎧ shows over 99% for all kinds of indoor dust.
가정용 고분자 전해질 연료전지 열병합 발전시스템의 급탕 적용을 위한 온수 저장조의 최적 설계에 관한 실험적 연구
황유진(Yujin Hwang),안영철(Young-Chull Ahn),정성일(Seong-ir Cheong),진근호(Keun-ho Jin),이재근(Jae-keun Lee) 대한설비공학회 2008 설비공학 논문집 Vol.20 No.6
There are many attempts to use a fuel cell system as a residential power generation system. The purpose of this study is to investigate the optimal design of a water tank for a hot water system when the fuel cell co-generation system is combined with a domestic hot water supply system. The demands of hot water supply per month per home are investigated in Busan for a year. It showed somewhat large differences between the actual demand and the designed demand of hot water, but the actual capacity of hourly averaged hot water demands is analyzed as 60 ℓ/h in this study based on the actual demand. The experiments are performed in the various inlet and outlet locations of nozzles, and the hot water consumption rates. The experimental results are showed that the optimal capacity of the water tank is 200 f when the thermal efficiency, the storing capacity of hot water and the space for installation are considered.
침전극과 평행판 전극구조에 의해 발생된 이온풍의 특성분석
이재일(Jae-Il Lee),황유진(Yu-Jin Hwang),허우인(Woo-In Hue),정성일(Seong-Ir Cheong),주호영(Ho-Young Joo),이재근(Jae-Keun Lee) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.5
An experimental study is conducted to investigate the characteristic of the ion wind that is generated by electric field between a needle electrode and plate electrode. The ion wind enhances heat and mass transfer between the surface and the surrounding gas. Moreover such enhancement makes no noise or vibration. Therefore it can be applied to complex and isolated geometries. This study is conducted to develop the application of electronic cooling device. The gas velocity generated by ion wind relates to the parameters such as applied voltage, the distance of electrode gap, electrode type and relative humidity. The measured gas velocity is a linear function of the applied voltage and is inversely proportional to the gap of electrodes. The maximum gas velocity for the corona discharge in this system is 2.5 ㎧.