کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1711158 1519536 2014 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Relaxation behaviour of Jatropha curcas L. bulk seeds under compression loading
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی کنترل و سیستم های مهندسی
پیش نمایش صفحه اول مقاله
Relaxation behaviour of Jatropha curcas L. bulk seeds under compression loading
چکیده انگلیسی


• The relaxation behaviour of Jatropha bulk seeds was determined.
• Normalised force, rate and second derivative of normalised force were described.
• Oil point identified and verified with the aid of relaxation curves.

The relaxation behaviour of Jatropha curcas L. bulk seeds, expressed as the dependency of compressive force in relation to time, was determined for deformations 45, 50, 55, 60 and 65 mm respectively from Jatropha bulk seed of initial pressing height 80 mm using the pressing vessel diameter 60 mm. The normalised force, the rate of normalised force and the second derivative of normalised force, all versus relaxation time, were described for different deformations of Jatropha bulk seeds. It was observed that at the beginning of the relaxation process the normalised force at the oil point produced minimal amount suggesting that the oil point can be determined directly from the relaxation process which is also dependent on the rate and second derivative of the normalised force. However, the oil point of Jatropha bulk seeds can equally be determined by observation of the relaxation process. The dependency of compressive force versus relaxation time of Jatropha bulk seeds for different deformations showed a linear dependency within 2 s of relaxation time and after 10 s of the relaxation process, the rate of normalised force was constant and the relaxation process showed no internal dynamic forces and stresses on the bulk seeds. From observations after 100 s the whole relaxation process of Jatropha bulk seeds was completed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biosystems Engineering - Volume 125, September 2014, Pages 17–23
نویسندگان
, , , , , ,