Development of compact sized cashew nut shelling machinery, 2: Testing and evaluation of manual and semi-automatic shellers
1995
Thivavarnvongs, T. (Tokyo Univ. (Japan). Faculty of Agriculture) | Sakai, N. | Kitani, O.
The study on pre-shelling treatment and sizing of cashew nut gave results for a pre-shelling treatment condition of 30 min boiling time and 24 h drying time as optimum and for an effective sizing method, based on thickness and width parameters, width an average whole-kernel recovery of 82.7% for the sized nuts. Performance testing of six manually operated shellers gave results indicating that the Model AE (KKU) 2 sheller was the most promising sheller with shelling rate of 0.87 kg/h, shelling efficiency of 99.0% and whole-kernel recovery of 79.3%, whereas testing of the semi-automatic Model AE (KKU) SA1 sheller indicated a compromising optimum nut conveying rate of 40 nut/min, corresponding to a shelling rate of 3.14 kg/h, shelling efficiency of 75.0% and whole-kernel recovery of 80.0%. Economic evaluation of the six manually operated shellers indicated that the Model AE (KKU) 2 Sheller was the most economically attractive sheller, giving the lowest break-even amount and pay back period and the highest net profit of over 1,000 B/yr for amount of nuts shelled 100 kg/yr, whereas the semi-automatic sheller was considered attractive only when large amounts of nuts were shelled, giving a net profit, for one specific example, of approximately 17,000 B/yr for amount of nuts shelled 5 tons/yr
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