DEVELOPMENT AND PERFORMANCE EVALUATION OF A PEDESTRIAN CONTROLLED RICE STRIPPER
DEVELOPMENT AND PERFORMANCE EVALUATION OF A PEDESTRIAN CONTROLLED RICE STRIPPER
No Thumbnail Available
Date
2008-12
Authors
ADISA, ALEX FOLAMI
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
A pedestrian controlled rice stripper was then designed, fabricated
and its performance was evaluated on a field with farro 44 variety of rice.
The total estimated power required to operate the harvester was 2.33kw,
while the stripping unit required only 0.78kw of the total power.
In evaluating the harvester’s field performance, randomized
complete block design (RCB) was adopted to study the effect of
harvester’s forward speed, stripper rotor speed, stripper rotor height,
harvested grain purity, field capacity, fuel consumption and harvester
efficiency.
Results showed that time taken had high significant effect at 1%
level on the harvester’s forward speed. The shattered loss showed both
linear and polynomial trend of increase as the harvester’s forward speed
increases. The stubble loss increases linearly and polynomially as both
stripper rotor speed and harvester’s forward speed increases. Lodging
losses also increased both linearly and polynomially as the stripper rotor
speed and harvester forward speed increases at two levels of rotor
heights 270mm and 220mm.
The time taken to harvest had high significant effect at 1% level on
the harvester forward speed, at two levels of the rotor heights. Also the
fuel consumption decreased in a polynomial trend as the stripper rotor
speed increased at the two levels of rotor heights 270mm and 220mm.
At stripper rotor height 270mm, harvester forward speed of 3km/h
and stripper rotor speed of 670rpm gave the lowest total losses. These
combinations gave shattered loss as 5.46%, stubble loss 4.97% and
lodging loss 3.08% of the total yield at 270mm rotor height. Also the
effective field capacities was 0.078 ha/h; and fuel consumption was 27.6
litres/ha, the harvester’s efficiency at the same settings was 81 percent
and grain purity was 90.3% at the same machine settings.
Description
A DISSERTATION SUBMITTED TO THE POST
GRADUATE SCHOOL IN PARTIAL FULFILLMENT FOR THE
REQUIREMENTS FOR THE AWARD OF THE DEGREE OF
DOCTOR OF PHILOSOPHY IN AGRICULTURAL
ENGINEERING
DEPARTMENT OF AGRICULTURAL ENGINEERING
2
FACULTY OF ENGINEERING
AHMADU BELLO UNIVERSITY
ZARIA
NIGERIA.
DECEMBER, 2008
Keywords
DEVELOPMENT,, PERFORMANCE,, EVALUATION,, PEDESTRIAN,, CONTROLLED RICE STRIPPER