External heat-exchange in a quasi-bidisperse granular fluidized bed
https://doi.org/10.29235/1561-8358-2021-66-2-220-226
Abstract
This paper presents the results of an experimental study of the external heat-exchange with a tube bundle in a bidisperse fluidized bed with marked bimodality of particle size distribution. The dependence of the maximum heat-transfer coefficient on the rate of air filtration was determined. The influence of the mass fraction of large particles on the heat-transfer coefficient in a mixture has been established. An interpolation dependence for calculating the optimal filtration rate of the investigated mixtures has been obtained. It is recommended to use the average surface diameter of the polydisperse particles mixture as the equivalent diameter when calculating the heat-exchange. A method for calculating the maximum heat-transfer coefficient and the optimal filtration rate for a quasi-bidisperse fluidized bed has been developed. The method is based on the use of heat transfer coefficients and optimal filtration rates of individual components of the bidisperse mixture. The equations for calculating the maximum heat-transfer coefficient and the optimal filtration rate in the bidisperse mixture has been obtained.
About the Author
E. K. Buchilko
A. V. Luikov Heat and Mass Transfer Institute of the National Academy of Sciences of Belarus
Belarus
Belarus
Eduard K. Buchilko – Researcher
15, Brovka Str., 220072, Minsk, Republic of Belarus
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