| Autor: |
null Kevin L. Kenney, null Christopher T. Wright, null Reed L. Hoskinson, null J. Richard Hess, null David J. Muth, null Jr. |
| Rok vydání: |
2006 |
| Předmět: |
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| Zdroj: |
2006 Portland, Oregon, July 9-12, 2006. |
| DOI: |
10.13031/2013.21525 |
| Popis: |
Composition and pretreatment studies of corn stover and wheat stover anatomical fractions clearly show that some corn and wheat stover anatomical fractions are of higher value than others as a biofeedstock. This premise, along with soil sustainability and erosion control concerns, provides the motivation for the selective harvest concept for separating and collecting the higher value residue fractions in a combine during grain harvest. This study recognizes the analysis of anatomical fractions as theoretical feedstock quality targets, but not as practical targets for developing selective harvest technologies. Rather, practical quality targets were established that identified the residue separation requirements of a selective harvest combine. Data are presented that show that a current grain combine is not capable of achieving the fidelity of residue fractionation established by the performance targets. However, using a virtual engineering approach based on an understanding of the fluid dynamics of the air stream separation, the separation fidelity can be significantly improved without significant changes to the harvester design. A virtual engineering model of a grain combine was developed and used to perform simulations of the residue separator performance. The engineered residue separator was then built into a selective harvest test combine, and tests performed to evaluate the separation fidelity. Field tests were run both with and without the residue separator installed in the test combine, and the chaff and straw residue streams were collected during harvest of Challis soft white spring wheat. The separation fidelity accomplished both with and without the residue separator was quantified by laboratory screening analysis. The screening results showed that the engineered baffle separator did a remarkable job of effecting highfidelity separation of the straw and chaff residue streams, improving the chaff stream purity and increasing the straw stream yield. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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