Modeling and Analyzing of Specific Mechanical Energy in Animal Feed Extrusion Process
Copyright policy )Modeling and Analyzing of Specific Mechanical Energy in Animal Feed Extrusion Process
Abstract. A new mathematical model was proposed to describe the specific mechanical energy (SME) in the animal feed extrusion process based on dimensional analysis methodology (DAM). The effects of feed moisture content (21.3% to 29.7%), screw speed (140 to 240 rpm), and extrusion temperature (133°C to 167°C) on SME were studied by response surface methodology (RSM). The dimensional model was established with experiment data. The average deviation of the model correlation was 0.66%. The sequencing of parameter sensitivities of the SME model was T 0 > T b > P > I > Q > w > n. A positive correlation between extrusion temperature and SME and a negative correlation between screw speed, moisture content, and SME were found in both the dimensional model and RSM. It was found from RSM that the moisture content (p
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