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Residence Time Distribution and Barrel Fill in Pet Food Twin‐Screw Extrusion Cooking
Author(s) -
Mahungu S. M.,
Drozdek K. A.,
Artz W. E.,
Faller J. F.
Publication year - 2000
Publication title -
cereal chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.558
H-Index - 100
eISSN - 1943-3638
pISSN - 0009-0352
DOI - 10.1094/cchem.2000.77.2.220
Subject(s) - barrel (horology) , residence time distribution , extrusion , residence time (fluid dynamics) , extrusion cooking , plastics extrusion , chemistry , mixing (physics) , constant (computer programming) , composite material , materials science , mineralogy , inclusion (mineral) , geotechnical engineering , physics , organic chemistry , quantum mechanics , computer science , engineering , programming language
The residence time distribution and barrel fill of pet food in a twinscrew extruder was determined under conditions of a constant ratio of feed rate to screw speed. Specific feeding load was held constant at 0.16 kg/hr/ rpm while feed rate ranges were 24–56 kg/hr and screw speed ranges were 150–350 rpm. The residence time rapidly decreased as feed rate and screw speed increased. The spread of the residence time distribution (RTD) was smaller at higher feed rates and screw speed, however analysis of the normalized RTD indicated greater mixing. The barrel fill was constant at ≈50% throughout the range of experimental conditions.