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판형 열교환기에서 에틸렐글리콜 수용액의 열전달 및 압력강하 특성에 관한 실험적 연구
정현준(Hyun Joon Chung),강훈(Hoon Kang),김용찬(Yongchan Kim),이광진(Kwangjin Lee),이동균(Dongkyun Lee),이원희(Wonhee Lee),신완순(Wan-Soon Shine) 대한설비공학회 2018 설비공학 논문집 Vol.30 No.8
Having desirable thermal characteristics, such as a low freezing point, a high boiling point, better stability over a wide range of temperatures, and good thermophysical properties, ethylene-glycol water is a very popular antifreeze and heat-transfer fluid in numerous commercial and industrial applications. In this study, the heat-transfer and pressure-drop characteristics of a brazed-plate heat exchanger were investigated experimentally using ethylene-glycol water and R410a as the two fluids in a plate heat exchanger. The heat-transfer rate and pressure drop of the ethylene-glycol water were measured by changing inlet temperature, volumetric flow rate, and composition. The inlet temperature, volumetric flow rate, and composition were varied from 12.0 to 30.0℃, 4.9 to 26.8 lpm, and 30 to 55 percent, respectively. In addition, correlations were proposed to predict the heat-transfer coefficient and friction factor.