Julius Ceasar L. Nebab of Buenavista, Claveria, Cagayan pioneered the fabrication of a mechanized vacuum grain collector, this being his requirement in the pursuit of his degree in BS Agricultural Engineering at the Cagayan State University- Sanchez Mira campus.
Nebab, who belongs to the prime batch and who just graduated this June 2017 was awarded “Best in Undergraduate Thesis”. The same study bagged the “Best paper in the Technological Category and he was adjudged Best Student Researcher” during the 2017 University RDE Search. His adviser, Engr. Shirly O. Agcaoili, monitored the development and fabrication of the said machine.
The design and development of a Small-Engine Driven Vacuum Grain Collecting Machine
As a result of his deep observation on account of the method in collecting grains that are sun dried in concrete pavement in all rice farming areas in the Philippines is very much traditional and makes use of metal scoop or panake. This method is labor consuming especially when unexpected rainfall comes. Farmers have to employ more number of people to collect these grains immediately or else, drying process would be useless. Thus, farmers and retailers of grains will spend more money for the labor and often leads to contamination of the grain with dust and dirt in the concrete pavements. Hence, the Small Engine-driven Vacuum Grain Collecting Machine, made of locally available materials using local manufacturing technology was designed, fabricated and tested to evaluate its performance in terms of collecting capacity, collecting efficiency, quality of collected grains and fuel consumption at different rotational speed of the air-mover shaft.
Description and performance capability of the fabricated SEDVGCM
The prototype small engine-driven vacuum grain collecting machine had the ability to winnow the chaffs, dirt and dusts, which are lighter than the grains. It was capable of reducing labor requirement and contamination.
A Honda GP 200, 4.1 kW at 3600 rpm, air-cooled four stroke petrol engine (OHV), single cylinder, and a high-speed gasoline engine was used a prime mover of the vacuum collector. It has a two radial flat bladed centrifugal fan with a casing size 40 centimeter diameter made of G.I. sheet 1.5 mm thickness with a conveyance system which includes suction head, five suction tubes, cyclone separator and rotary valve and a bagging section below the cylinder supporting one sack with an inclined orientation.
The performance of the machine was evaluated in terms of collecting capacity, collecting efficiency, quality of grain collected and fuel consumption at different rotational speeds. The maximum capacity, efficiency and fuel consumption of 645.32 kg/h, 97.98 percent and 1.42 L/h, respectively were achieved at a 200 rpm rotational speed. The maximum quality of collecting grains of 99.89 percent was achieved at 1750 rpm rotational speed.