Journal
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
Volume 162, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cep.2021.108332
Keywords
Bubble column; Heat transfer coefficient; Air-water-glass beads; Internals; Levenberg-Marquardt algorithm
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Funding
- National Natural Science Foundation of China [U1862201, 21625603]
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This study aims to develop reliable correlations for predicting heat transfer coefficients in bubble columns, considering various factors that influence these coefficients, which can be applied in accurately predicting heat transfer coefficients in bubble columns.
Knowledge of the heat transfer coefficients in bubble columns can offer valuable references for the design and scale-up of reactors. This work aims to develop reliable correlations that can be applied in precisely predicting the global and local heat transfer coefficients in air-water or air-water-glass beads bubble columns. The influence of superficial gas velocities, column dimensions, volume fraction of particles, internals and radial positions on the heat transfer coefficients is considered in the developed correlations. In addition, the effect of the function forms on the accuracy of calculated local heat transfer coefficients is investigated. The Levenberg-Marquardt Algorithm is used to determine the values of the parameters in the empirical correlations. The recommended correlations can be applied in accurately predicting the heat transfer coefficients in bubble columns.
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