Heat transfer model of two-phase flow across tube bundle in submerged combustion vaporizer  

作　　者：Jiajun Song Dongyan Han Qinqin Xu Dan Zhou Jianzhong Yin 

机构地区：[1]State Key Laboratory of Fine Chemicals,School of Chemical Machinery and Safety,Dalian University of Technology

出　　处：《Chinese Journal of Chemical Engineering》2019年第3期613-619,共7页中国化学工程学报（英文版）

摘　　要：In order to optimize the design of the submerged combustion vaporizer(SCV), an experimental apparatus was set up to investigate the heat transfer character outside the tube bundle in SCV. Several experiments were conducted using water and CO_2 as the heat transfer media in the tubes, respectively. The results indicated that hot air flux, the initial liquid level height and the tube pitch ratio had great influence on the heat transfer coefficient outside the tube bundle(ho). Finally, the air flux associated factor β and height associated factor γ were introduced to propose a new hocorrelation. After verified by experiments using cold water, high pressure CO_2 and liquid N_2 as heat transfer media, respectively, it was found that the biggest deviation between the predicted and the experimental values was less than 25%.In order to optimize the design of the submerged combustion vaporizer(SCV), an experimental apparatus was set up to investigate the heat transfer character outside the tube bundle in SCV. Several experiments were conducted using water and CO_2 as the heat transfer media in the tubes, respectively. The results indicated that hot air flux, the initial liquid level height and the tube pitch ratio had great influence on the heat transfer coefficient outside the tube bundle(ho). Finally, the air flux associated factor β and height associated factor γ were introduced to propose a new hocorrelation. After verified by experiments using cold water, high pressure CO_2 and liquid N_2 as heat transfer media, respectively, it was found that the biggest deviation between the predicted and the experimental values was less than 25%.

关 键 词：Submerged combustion vaporizer Fluid sweeping tube bundle Two-phase flow Heat transfer coefficient Modeling 

分 类 号：TQ[化学工程]