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근적외선 가열 시스템의 냉각 성능에 대한 수치적인 연구
김응복(Eung-Bok KIM),한민섭(Minsub HAN),김제덕(Jae-Duck KIM),최원택(Won-Taek CHOI),정영균(Young-Guen JUNG),이승민(Seung-Min LEE) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.11
The so called near-infra-red(NIR) heating system has advantages over the convectional convection-based systems in terms of heating uniformity and energy efficiency. However, when the glass temperature of the radiation lamp goes over a certain limit, it gets blackened and over-heated. The life of the radiation module then becomes severely limited. The high operating-temperature and radiative-heat-transfer of the system hinder detailed analysis of the reliability problem with an experimental approach alone. We develop a three dimensional heat-transfer model of the NIR heating system that can provide the temperature distribution on the glass lamp and the performance of the cooling system. We use a ray-tracing model for the radiation transport. The model is then conjugated with a commercial CFD code that solved the conductive and convective transports. The results of the simulation are compared with test data and a good overall agreement is shown.
근적외선 가열 시스템의 냉각 성능에 대한 수치적인 연구
유근표(Keun-Pyo Yoo),한민섭(Minsub Han),김제덕(Jae-Duck Kim),최원택(Won-Taek Choi) 대한설비공학회 2013 설비공학 논문집 Vol.25 No.5
A near infrared (NIR) heating system has advantages over the conventional convection-based systems, in terms of heating uniformity and energy efficiency. When it is over-heated during its operation, the radiation lamp gets blackened, and the life of the radiation module becomes severely limited. The heat transfer system in the module is based on a high operating-temperature, and the radiation makes it difficult to analyze in detail the reliability issue, with an experimental approach alone. We developed a numerical heat-transfer model of the NIR heating system. We applied a ray-tracing method on the radiative heat transport, and a finite volume method on the conductive and convective systems, respectively. The cooling performance of the system is presented, based on the energy and flow distributions in the module. The factors that directly affect the module life are analyzed, such as the surface temperatures of the lamp glass and the reflector, and design improvements are discussed.