Analysis of air flow resistance through a porous stone bed. (October 2020)

• Record Type: Journal Article
• Authors: Kurpaska, Sławomir; Kiełbasa, Paweł; Sobol, Zygmunt; Tabor, Sylwester; Gliniak, Maciej; Bojdo, Kamil
• Is Part Of: Biosystems engineering. Volume 198(2020)
• Page Start: 323
• Page End: 337
• Publication Date: 2020-10
• Subjects: Friction factor -- Pressure drop -- Stone heat accumulator; Bioengineering -- Periodicals; Agricultural engineering -- Periodicals; Biological systems -- Periodicals; Génie rural -- Périodiques; Systèmes biologiques -- Périodiques; 631
• DOI: 10.1016/j.biosystemseng.2020.08.002
• Languages: English
• ISSNs: 1537-5110

Abstract

Abstract : The results of analysis of airflow resistance through a porous stone accumulator bed are presented with studies conducted in laboratory and in a full-scale facility. The Darcy–Weisbach equation and Ergun's equation were used to determine the flow resistance coefficients. It was found that a simplification of the Ergun's equation by omitting the viscosity term did not result in a significant error in estimating the flow resistance. Dimensional analysis was applied to analyse the flow resistance in the full-scale facility and to determine the form and parameters of equation allowing a calculation of airflow resistance as a function of independent variables. The analysis showed a significant convergence between the friction factors and flow resistance calculated with the use of proposed equations and the values obtained from measurements. It is concluded that the following factors have the largest impact on the airflow resistance in order: bed particle diameter, followed by airflow velocity, effective section diameter and, to the same degree, layer height and bed mass. Highlights: Rock bed airflow resistance based on aerodynamic properties of stone layers. Simplification of the Ergun's equation by omitting the viscosity term in estimating the flow resistance. Dimensional analysis applied to determine the parameters of airflow resistance as a function of independent variables.