Study on the Influence of Structural Parameters of Multi-channel Cylinder Dryer on Heat Transfer Performance

作     者：Yan Yan Dong Jixian 

作者机构：Shaanxi University of Science & Technology Xi 'an 710021 China 

基　　金：Acknowledgements This project is supported by the National Natural Science Foundation of China (Grant No. 51375286)  Natural Science Basic Research Plan in Shaanxi Province of China (Program No. 2012JZ7002) and the key scientific and technological innovation team fund of Shaanxi Province of China (Program No. 2014KCT- 15) 

出 版 物：《Journal of Energy and Power Engineering》 (能源与动力工程（美国大卫英文）)

年 卷 期：2017年第11卷第7期

页      码：454-464页

摘      要：An approach to design multi-channel cylinder dryer was proposed. The heat transfer performance and flow characteristic under various structural parameters were analyzed. First, an experiment was designed and set up to measure the condensing heat transfer coefficient and the pressure drop in order to ,~erify the applicability of the Cavallini＇s correlation. Then, the relationship among the count of channels, aspect ratio, spacing ratio, width, height and hydraulic diameter of a channel was given. Finally, the correlation of condensing heat transfer and the homogeneous model was introduced in order to observe the heat transfer performance and flow characteristic of the multi-channel cylinder dryer affected by different structures. The study reveals that the structural parameters including count of channels, aspect ratio, spacing ratio of a channel dramatically influence the condensation heat transfer coefficient and frictional resistance of the steam. Based on the selected paper machine, it is suggested that the overall performance of the multi-channel cylinder dryer is best if the count of channels is 150-200, the aspect ratio is 1 ： 3 and the spacing ratio is 1 ： 1-1 ： 3.

主 题 词：Multi-channel cylinder dryer condensation heat transfer distributed parameter model numerical simulation. 

学科分类：080706[080706] 080701[080701] 08[工学] 0807[工学-电子信息类] 

D　O　I：10.17265/1934.8975/2017.07.005

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