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안영철(Youngchull Ahn),조재민(Jaemin Cho),이재근(Jaekeun Lee),이현욱(Hyunuk Lee),안승표(Seungphyo Ahn),윤덕현(Deokhyun Youn),강태욱(Taewook Kang),옥주호(Juho Ock) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.4
The air-side particulate fouling in the heat exchangers of HVAC applications degrades the performance of<br/> cooling capacity, pressure drop across a heat exchanger, and indoor air quality. Indoor and outdoor air<br/> contaminants foul heat exchangers. The purpose of this study is to investigate the fouling characteristics<br/> trough accelerated tests. The fouling characteristics are analyzed as functions of a dust concentration (1.28<br/> and 3.84 g/㎥), a face velocity (0.5, 1.0, and 1.5 m/s), and a surface condition. The cooling capacity in the<br/> slitted finned-tube heat exchangers at the face velocity of 1 m/s decreases about 2% and the pressure drop<br/> increases up to 57%. The rate of build-up of fouling is observed to be 3 times slower for this three-fold<br/> reduction of dust concentration whilst still approaching the same asymptotic level.