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시케오 아오야마(Aoyama, Shigeo),모진용(Mo, Jin-Yong),이재권(Lee, Jae-Kwon),송용재(Song, Yong-Jae),한형석(Han, Hyung-Suk) 한국소음진동공학회 2006 한국소음진동공학회 논문집 Vol.16 No.3
In the air-conditioner, refrigerant induced noise and vibration can be increased when the airflow rate is reduced in order to decrease the noise at the low mode. Through the test and analysis of this kind of noise, it can be verified that the main reasons of refrigerant induced noise are the velocity and flow Induced force of the refrigerant at the inlet of the evaporator, So, in order to reduce this velocity, quality at the evaporator inlet should be minimized. And, in order to reduce flow induced force of the refrigerant, sudden change of fluid flow must not be occurred. So, in this paper, we will review the characteristics of refrigerant cycle and find how the quality and flow induced force can be minimized.
한재오(Jae-Oh Han),유승훈(Seung-Hun Yu),모진용(Jin-Yong Mo) 한국유체기계학회 2007 유체기계 연구개발 발표회 논문집 Vol.- No.-
Computational investigation was conducted to study the effects of the shape parameter of shroud on the performance of the outdoor unit of an air-conditioners. For this study the DOE(4-factor 3-level) was created and the an automatic program was composed using VBA to reduce the load of pre-process for CFD. The estimated mathematical equation was produced from this analysis and it was found that the gap between fan and shroud affects more heavily than the other parameters. As a result, the composition of the best parameters was verified that its flow rate was increased by 10 percents and sound pressure level was reduced by 1.2 dBA compare with the worst.