http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
제지건조기용 실린더드럼에서 열전달특성에 관한 이론적 분석
이기우(Ki-Woo Lee),전원표(Won-Pyo Chun),이계중(Kye-Jung Lee),장석필(Seok-Pil Jang) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11
The heat transfer process from steam to web through the cylinder drum consists of the thermal resistance by condensate thickness, thickness of shell, and the contact resistance between cylinder and web. The most thermal resistance in conventional cylinder drum dryer is generated by condensate, which is increased by the increase on revolution per minute(RPM). Therefore, the increase of RPM for the production enhancement results in the more thermal resistance, and eventually RPM is restricted. In this study, the theoretical analysis on the characteristics of heat transfer in cylinder drum for paper dryer was performed in the stationary state of steam in drum. The overall heat transfer coefficient, steam quantity and heat transfer quantity were predicted by diameter and length of drum, condensate thickness, revolution per minute and steam temperature for experimental apparatus design.
사이폰없는 실린더드럼에서 다중유로에 의한 응축수배출에 관한 실험적 연구
이기우(Ki Woo Lee),전원표(Won Pyo Chun),이계중(Kye Jung Lee),하재청(Jae Cheong Ha) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.5
Cylinder drum dryer tor paper drying is the method which drys the wetted paper flowing on surface of drum by steam. The condensate, which the steam transfers the heat to the surface of drum for paper drying and is condensed, must be removed for continuous drying. In this paper, the condensate removal and heat transfer characteristics were experimented according to steam pressure, revolution of drum and height of flow channel by multi-f1ow channel in cylinder drum without syphon. And these heat transfer characteristics were compared with the case of conventional type with syphon for condensate removal. As the experimental results, the minimum steam pressure existed for the removal of condensate by steam pressure without siphon, and heat transfer quantity in cylinder drum with multi-flow channel was approximately increased to 28% compared to conventional drum. Accordingly, application effect on this technology was expected to be great, but a lot of steam was exhausted with condensate, so this problem must be improved for the commercialization of cylinder dryer with multi-t1ow channels.