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Heat Transfer Simulation of Cooling Phase in High Temperature Calendering Process of Aramid Paper
  
DOI:10.11980/j.issn.0254-508X.2018.02.004
Key Words:aramid paper  calender  heat transfer  simulation
Fund Project:国家重点研发计划资助(2017YFB0308100)。
Author NameAffiliation
陈 军 华南理工大学制浆造纸工程国家重点实验室广东广州510640 
耿 浩 华南理工大学制浆造纸工程国家重点实验室广东广州510640 
白静静 华南理工大学制浆造纸工程国家重点实验室广东广州510640 
王 宜* 华南理工大学制浆造纸工程国家重点实验室广东广州510640 
胡 健 华南理工大学制浆造纸工程国家重点实验室广东广州510640 
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Abstract:After being calendered at 320℃, the aramid paper would cool down quickly after exiting the pressure zone, resulting in paper shrinkage and affecting the winding process. The cooling process was simulated by Newton’s Cooling Law and the Contrast Parameter Formula, and the temperature of the paper after being heating and leaving pressing zone was calculated using the Matlab software.The experiments were executed to compare the simulated data with the actual results for validation of the simulation model. In these experiments, the pilotcalender machine operation conditions were controlled that only one roll was heated to 320℃ and the other roll was not heated. From the results, it could be concluded that the simulation program predicted very well the behavior of heat transfer in the aramid paper. The results also showed that the heat transfer after exiting the nip was dominated by natural convection when the speed of machine was 10 m/min. The temperature of the paper droped so quickly that it decresed to 50.2 ℃ when it left the nip only 1 meter and it would reached to room temperature when the distance was 5 meters.
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