سال انتشار: ۱۳۸۵
محل انتشار: چهارمین کنگره ملی مهندسی ماشین های کشاورزی و مکانیزاسیون
تعداد صفحات: ۱۴
S afzalinia – agricultural research center of fars province zarghan
m robege – department of agricultural &bioresorce engineering university of saskatchewan
Analytical and empirical models were developed for the pressure -density relationship of a large sqiuare baler for baling alfalfa and barley straw. The effect of flake size and load setting on the plunger force and bale density was also determined for baing alfalfa and barleys traw. results showed that according to the analytical model bale density initially decreased with distance from the plunger and then remained almost constant up to end of the compression chamber. the developed empirical model for both alfalfa and barley straw was a combination of a quqdratic and an exponential equation.