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옵셋 스트립 휜 열교환기의 구조 개선을 통한 최적 설계
이동엽(Dong Yob Lee),강근(Geun Kang),조위삼(Wisam Jo),신동호(Dongho Shin),고한서(Han Seo Ko) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.11
Recently many people are interested in clothes dryer for wellness and live space efficiency. The advantage of the clothes dryer is needless of drying rack and easy drying with less time and work. Since the OSF(Offset Strip Fin) heat exchanger of the condensing clothes dryer plays an important role, researches has been performed. A heat exchanger can be evaluated by the effectiveness basis and dehumidification rate which is related to the latent heat. Thus, the thermal flow of the latent heat through the heat exchanger was analyzed to improve the performance of the factors affecting the efficient browsing. In this study, dynamic changes with respect to the latent heat were studied by the flow analysis and numerical simulation with the fin performance test to propose the optimum design of the OSF heat exchanger.
Study on Flow Structure inside Room Air Conditioner Using Visualization Technique
이수홍(Soo-Hong Lee),라선욱(Seon-Uk Na),강근(Geun Kang),고한서(Han Seo Ko) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11
Whole flow fields of a room air conditioner (RAC) have been visualized by a Particle Image Velocimetry (PIV) technique to analyze the flow structure with various inlet and outlet angles, and to control an eccentric vortex which affects an efficiency and noise of the RAC. A test model with 5 stages of a cross flow fan has been manufactured and a transparent acryl has been installed at the side of the test model for the PIV experiment. The inlet and outlet flows and the flow inside the cross flow fan have been analyzed by varying the inlet grill angles and outlet blade angles. The movement of the eccentric vortex has been investigated experimentally by developing the measurement technique for the inner flow field of the cross flow fan. From the visualization of the inner flows, the origins of the noise inside the RAC and the condensation points around the outlet parts of the cold air have been observed and the solution of the problems can be proposed in this study.
이수홍(Soo-Hong Lee),라선욱(Seon-Uk Na),강근(Geun Kang),고한서(Han Seo Ko) 한국가시화정보학회 2009 한국가시화정보학회 학술발표대회 논문집 Vol.2009 No.11
Flow distributions of a room air conditioner (RAC) have been investigated using a visualization technique such as a Particle Image Velocimetry (PIV) to analyze an efficiency and noise of the RAC. Pitot tubes have also been used to measure the flow velocity inside the RAC with various positions to confirm the measurement accuracy of the PIV technique. Then, numerical analyses have been carried out by developing Computational Fluid Dynamics (CFD) programs to calculate the flow velocity inside the RAC. From the results of the experimental and numerical studies, new designs of the RAC have been proposed to improve the efficiency of the RAC. Various flow distributions by controlling the outlet flow velocity have been observed experimentally and numerically to compare the efficiencies between different RAC models in this study.
이수홍(Soo-Hong Lee),라선욱(Seon-Uk Na),강근(Geun Kang),고한서(Han Seo Ko) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.5
Flow distributions of a room air conditioner (RAC) have been investigated using a visualization technique such as a Particle Image Velocimetry (PIV) to analyze an efficiency and noise of the RAC. Pitot tubes have also been used to measure the flow velocity inside the RAC with various positions to confirm the measurement accuracy of the PIV technique. Then, numerical analyses have been carried out by developing Computational Fluid Dynamics (CFD) programs to calculate the flow velocity inside the RAC. From the results of the experimental and numerical studies, new designs of the RAC have been proposed to improve the efficiency of the RAC. Various flow distributions by controlling the outlet flow velocity have been observed experimentally and numerically to compare the efficiencies between different RAC models in this study.
고효율 룸 에어컨 설계를 위한 유동 분포 측정에 관한 연구
이수홍(Soo-Hong Lee),라선욱(Seon-Uk Na),강근(Geun Kang),고한서(Han Seo Ko) 대한설비공학회 2009 대한설비공학회 학술발표대회논문집 Vol.2009 No.-
Test models which have geometrical similarities with a real room air conditioner (RAC) have been manufactured including visualization windows so that a laser beam can pass through a cross flow fan. Then, flow distributions of the RAC have been investigated using a visualization technique such as a Particle Image Velocimetry (PIV) to analyze an efficiency and noise of the RAC. Pitot tubes have also been used to measure the flow velocity inside the RAC with various positions to confirm the measurement accuracy of the PIV technique. The measured flow velocities have been analyzed and new designs of the RAC have been proposed to improve the efficiency and to reduce the noise for the RAC in this study.