Theoretical analysis of force, pressure and energy distributions of bulk oil palm kernels along the screwline of a mechanical screw press FL 200
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KuupΓ€ev
2019
KΓ€ttesaadav alates
Autorid
Ajakirja pealkiri
Ajakirja ISSN
KΓΆite pealkiri
Kirjastaja
Abstrakt
The present study is a follow-up of the previously published study on the mathematical
description of loading curves and deformation energy of bulk oil palm kernels under compression
loading, aimed at determining theoretically the amounts of force, pressure and energy along the
screw lamella positions ππΏπ of the screw press FL 200 by applying the tangent curve
mathematical model and the screwline geometry parameters (screw shaft diameter, screw inner
and outer diameters, screw pitch diameter and the screw thickness). The fitting curve value πΉπ£ of
the tangent mathematical model was further examined at πΉπ£ = 2 and πΉπ£ = 3 by identifying the
force, deformation, stress and compression coefficients at varying vessel diameters π·π£ and initial
pressing heights π»π‘ of the bulk oil palm kernels. Based on the results of the stepwise regression
analysis, the amounts of the theoretical deformation energy ππ·πΈ in linear pressing as well as the
theoretical force πΉπ
, pressure ππ and energy ππΏπΈ of the screw press FL 200 were statistically
significant (P-value < 0.05) or (F-value > significance F) in relation to the predictors (π»π‘
, π·π£
, πΉπ£
and ππΏπ). The coefficient of determination (R2
) values between 61 and 86 % were observed for
the determined regression models indicating that the responses ππ·πΈ, πΉπ
, ππ and ππΏπΈ can accurately
be predicted by the corresponding predictors. The normal probability plots of the responses
approximately showed a normal distribution.
Kirjeldus
Article
MΓ€rksΓ΅nad
experimental data, mathematical model, screw geometry parameters, compression loading, responses and predictors, articles