Search

The paper investigates the briquetting process of common reeds (Phragmites Australis) which are an important natural biomass resource in Latvia. The axial density distribution during compacting of ground common reeds in a closed die and the briquette length influence on the wall friction coefficient were determined. Briquette was separated in three equal parts and the density was measured for every briquette part. Density difference between the upper and lower slice of 52.9 mm briquette is 53 kg·m-3. Difference between the upper and lower stress was measured for the wall friction coefficient determination. Lower stress of briquette end linearly decreases up to 1.8 times if the briquette length increases to 57 mm. The calculated wall friction coefficient changes from 0.20 to 0.24 for the briquetting experiment results. [ABSTRACT FROM AUTHOR]