Optimization of Performance Parameters of Black Tea Withering Machine Based on CFD and RSM

AN Ting; JIANG Yongwen; LIANG Gaozhen; HU Bin; DONG Chunwang

doi:10.13305/j.cnki.jts.2019.05.006

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Journal of Tea Science ›› 2019, Vol. 39 ›› Issue (5) : 547-554. DOI: 10.13305/j.cnki.jts.2019.05.006

Optimization of Performance Parameters of Black Tea Withering Machine Based on CFD and RSM

AN Ting^{1, 2}, JIANG Yongwen², LIANG Gaozhen^{1, 2}, HU Bin^{1, *}, DONG Chunwang^{2, *}

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Abstract

In order to ascertain the influence of the structural parameters of the withering machine on withering performance, the numerical simulation analysis of withering environment was carried out by the fluid mechanics software. The temperature-integrated index after the dimensionless was used as the evaluation index of the withering performance and the response surface methodology (RSM) was used to optimize the three factors (the withering layer height x₁, the withering machine and the withering room space x₂, and the gas position x₃) that affect withering quality. The result shows that the order of importance of each factor on the withering quality was as follows: gas path position, withering machine layer height, space distance. The best set for temperature field performance of the black tea withering machine were x₁=10βcm, x₂=10βcm, x₃ =149.6βcm. The model’s R²=0.968β3, adjR²=0.927β5, the standard deviation was 0.061. The theoretical and actual values of the optimal scheme were: 0.951β9 and 0.909β6, respectively. The CFD and RSM fusion analysis method was suitable for optimizing the performance parameters of the black tea withering machine.

Key words

black tea / CFD / parameter optimization / RSM / withering

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AN Ting, JIANG Yongwen, LIANG Gaozhen, HU Bin, DONG Chunwang. Optimization of Performance Parameters of Black Tea Withering Machine Based on CFD and RSM[J]. Journal of Tea Science. 2019, 39(5): 547-554 https://doi.org/10.13305/j.cnki.jts.2019.05.006

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