Experimental Study on the Ventilation Resistance Characteristics of Paddy Grain Layer Modelled with Response Surface Methodology

The ventilation resistance of air flow through rice grain layers is one of the key parameters affecting drying uniformity as well as the energy consumption of the drying process. In order to reveal the variation of characteristics of the ventilation resistance with paddy grain moisture content, the...

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Bibliographic Details
Published in:Applied sciences 2021-09, Vol.11 (17), p.7826
Main Authors: Wang, Xiaoming, Han, Chongyang, Wu, Weibin, Xu, Jian, Zeng, Zhiheng, Tang, Ting, Zheng, Zefeng, Huang, Tao
Format: Article
Language:English
Subjects:
Air flow
Drying
Energy consumption
Ergun model
Flow resistance
Hypotheses
Laboratories
Moisture content
Moisture resistance
paddy grain
Pipelines
Polynomials
Pressure
Pressure drop
Response surface methodology
Sorghum
Variables
Velocity
Ventilation
Water content
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Summary:The ventilation resistance of air flow through rice grain layers is one of the key parameters affecting drying uniformity as well as the energy consumption of the drying process. In order to reveal the variation of characteristics of the ventilation resistance with paddy grain moisture content, the air velocity and the bed layer depth are needed. A second order model was fitted to pressure drop using the response surface methodology and the results are compared with those of the Ergun model. The results showed that the pressure drop increases with the increase of paddy grain moisture content, air velocity and the bed layer depth, and the interactions between the air velocity and the bed layer depth have the most significant influence on the pressure drop. Moreover, a second-order polynomial pressure drop model based on RSM was established and compared with the Ergun model. The results showed that the pressure drop model established by RSM is similar to that of the Ergun model.
ISSN:2076-3417
2076-3417
DOI:10.3390/app11177826