Study of the Impact of Tube Configurations on the Local Heat Transfer Coefficient in Mimicked Fischer-Tropsch Bubble Column Reactor

Processes

Hasan Sh. Majdi¹  Abdulrazaq Nadhim Alzamily²  Amer A. Abdulrahman²  Abbas J. Sultan² 

[1] Department of Chemical Engineering and Petroleum Industries, Al-Mustaqbal University College, Babylon 51001, Iraq;Department of Chemical Engineering, University of Technology-Iraq, Baghdad 10066, Iraq;

关键词: bubble column;    tube configurations;    heat transfer coefficient;    Fischer-Tropsch process;    bundle of heat exchanging tubes;    sophisticated heat transfer technique;   

DOI  :  10.3390/pr10050976

来源: DOAJ

【 摘 要 】

An experimental investigation was conducted to examine, for the first time, the influences of using different designs of tube arrangements on the local heat transfer coefficient (LHTC) in a bubble column (with a diameter of 0.13 m) equipped densely with a bundle of tubes. The effect of using two different designs of tube arrangements has been examined for a broad range of gas flow rates using a sophisticated heat transfer technique. The obtained results indicate that the LHTC increases significantly with increasing the gas velocity, regardless of the design and installation of the tubes in the column. Additionally, the shape of the LHTC’s profiles alters considerably by the presence of a bundle of tubes and their arrangements. Moreover, the results indicate that the square tube pitch arrangement provides uniform heat transfer profiles, which enhance the performance of the bubble column reactor by 30%. Furthermore, the heat transfer profiles were found to be varied with the axial height of the column. The new experimental results obtained in this investigation will provide experimental reference data for creating and validating a mathematical model for predicting LHTCs. In addition, this will facilitate this kind of reactor’s design, scale-up, and operation.

【 授权许可】

Unknown