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안광협(Kwang Hyup An),이정호(Jung Ho Lee),이인원(In-won Lee),이인섭(In-Seop Lee) 대한기계학회 2002 대한기계학회 춘추학술대회 Vol.2002 No.5
Modeling each part of the compressor and analyzing the properties of valves by ANSYS and impedance analyzing in suction muffler and shell cavity by SYSNOISE, we developed the performance analysis software to predict the EER of the compressor as well as pressure variation in cylinder and suction flow line and valve dynamics. And comparing the simulated data such as EER, cylinder pressure, suction pressure and suction pressure spectrum to the experimental data, we confirm the feasibility of this software.
PIV 유동 계측을 통한 천장형 실내기의 최적 제어 설계
성재용,안광협,이기섭,최호선,이인섭,Sung, Jae-Yong,An, Kwang-Hyup,Lee, Gi-Seop,Choi, Ho-Seon,Lee, In-Seop 대한기계학회 2003 大韓機械學會論文集B Vol.27 No.8
A heating flow discharged from a 4-way ceiling type indoor unit has been investigated to determine the design parameters for the optimal flow control. The flow was measured by a PIV(particle image velocimetry) system and an experimental model of 1/10 scale with a transparent room was devised by satisfying the Archimedes number. This similarity is generally used in cases where the forced convection has similar magnitude of the natural convection. To optimize the heating flow, several vane angles and vane control algorithms of cross and right angle controls were considered. Regarding the vane angle, experimental results show that 30$^{\circ}$is an optimal angle to avoid re-suction flows without significant increase in flow noise. Temperature distribution measured in the environmental chamber ensures the increased thermal comfort when compared to the case, 60$^{\circ}$angle. At the optimal angle, applying open/close control gives rise to more uniform distribution of the heating flow than without control. Especially, the cross-control seems to be satisfactory for thermal comfort.
성재용(Jaeyong Sung),안광협(Kwang Hyup An),이기섭(Gi Seop Lee),최호선(Ho Seon Choi),이인섭(In-Seop Lee) 대한기계학회 2002 대한기계학회 춘추학술대회 Vol.2002 No.5
Fluid flows discharged from a 4-way ceiling type indoor unit has been visualized for various vane angles<br/> using a PIV(particle image velocimetry) system. Then, optimal vane angle has been suggested for the best<br/> thermal comport. For the PIV measurements, a 1/10 scale experimental model with a transparent room was<br/> devised by satisfying the Archimedes number. The results of flow visualizations show that the vane angle<br/> should be less than 30° to avoid re-suction flows and to prevent the main stream being concentrated near the<br/> occupant’s head. However, at the smaller angles, flow induced noise increases. Thus, the vane angle of 30°<br/> has been suggested as an optimum. Temperature distribution measured in the environmental chamber also<br/> indicates that it is profitable for the warm flow near one’s feet.