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A general extrudate bulk density model for both twin-screw and single-screw extruder extrusion cooking processes

机译：适用于双螺杆和单螺杆挤出机挤出蒸煮过程的通用挤出物堆积密度模型

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摘要

Effects of extrusion parameters and raw materials on extrudate expansion are respectively investigated in a twin-screw extruder and a single-screw extruder extrusion cooking experiments for fish feed, wheat, and oat & wheat mixture processing. A new phenomenological model is proposed to correlated extrudate bulk density, extrusion parameters and raw material changes based on the experimental results. The average absolute deviation (AAD) of the correlation is 2.2% for fish feed extrusion in the twin-screw extrusion process. For the single-screw extrusion process, the correlation AAD is respectively 3.03%, 5.14% for wheat and oat & wheat mixture extrusion; and the correlation AAD is 6.6% for raw material change effects. The correlation results demonstrate that the proposed equation can be used to calculate extrudate bulk density for both the twin-screw extruder and the single-screw extruder extrusion cooking processes.
机译：分别在鱼饲料，小麦以及燕麦和小麦混合物加工的双螺杆挤出机和单螺杆挤出机的蒸煮实验中研究了挤出参数和原料对挤出物膨胀的影响。根据实验结果，提出了一种新的现象学模型来关联挤出物的堆密度，挤出参数和原料变化。在双螺杆挤压工艺中，鱼饲料挤压的相关性的平均绝对偏差（AAD）为2.2％。对于单螺杆挤出工艺，小麦和燕麦及小麦混合物挤出的相关AAD分别为3.03％，5.14％；原材料变化影响的相关AAD为6.6％。相关结果表明，所提出的方程可用于计算双螺杆挤出机和单螺杆挤出机挤出蒸煮过程的挤出物堆积密度。

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