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| Effective factors on timothy hay creep properties when compressed to high density |
| 1.Department of Agricultural Engineering, China Agricultural University, Beijing 100083, China; 2.Agricultural and Bioresource Engineering Department, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5A9, Canada) |
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Abstract Creep property has significant effect on fibrous biomass compress processing. Different creep properties influence the energy consumption during compacting. In order to investigate the proper parameters for compression process, four elements Burger′s model was introduced and the creep properties of timothy hay bales were analyzed under different moisture contents and lengths. The results show that this model fits the data well and those two conditions influence the creep properties especially the moisture content. It was found that two factors had significant effects on the creep: elastic factor and viscous factor. These two factors contained around 86.45％ of creep information. Timothy hay bales show lower values of elasticity and viscosity under high moisture content than those under low moisture content. Meanwhile, the length of timothy grass has no effects on these values when the grass has high moisture content. Therefore, it is concluded that it will consume less energy when timothy hay is compressed to hay bale under high moisture content than those under other conditions.
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2011, Vol. 32 
