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판형열교환기 핀 홀의 위치 및 유속에 따른 누수율 및 내부 유동 특성에 관한 실험적 연구
송강섭(Kang Sub Song),백창현(Chanhyun Baek),김성우(Sung Woo Kim),김용찬(Yongchan Kim) 대한설비공학회 2016 설비공학 논문집 Vol.28 No.5
Plate heat exchangers have been widely used in various fields because of their high heat transfer coefficients, small area of installation, and ease of maintenance compared to other heat exchangers. However, when plate heat exchanger is used for a long time, leak can occur due to inner crack. Therefore, it is important to understand the inner flow characteristics in plate heat exchangers. In this study, the inner flow characteristics and flow rate of plate heat exchanger were evaluated using various flow directions, pin-hole sizes, and Reynolds numbers. In downflow, initially most water flowed to the opposite of the inlet due to distribution region. Then it gradually had a uniform distribution due to chevron configuration. In upflow, it had a uniform flow consistently due to the dominant gravity effect. As the Reynolds number increased, the leak rate was decreased due to the inertia effect regardless of the flow direction.
쉘앤플레이트 열교환기 내 유동 및 열전달 특성에 관한 해석적 연구
임준엽(Junyub Lim),송강섭(Kang Sub Song),김동우(Dongwoo Kim),이동찬(DongChan Lee),김용찬(Yongchan Kim) 대한설비공학회 2018 대한설비공학회 학술발표대회논문집 Vol.2018 No.6
This study aimed to investigate the flow pattern and heat transfer characteristics in a shell and plate heat exchanger. The commercial CFD code (ANSYS CFX software, Ver. 18.0) was used with the shear stress transport model. The temperature changes on the plate-side and shell-side domains mainly occurred around the plate-side inlet port, and frictional pressure drops occurred gradually across the entire computational domains. In addition, the thermal performance factor with the corrugation depth of 2.5 mm was the highest compared with those of 2.0 mm and 3.0 mm.