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Energy cost of riding and walking type power tillers

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Title Energy cost of riding and walking type power tillers
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Creator Binisam, K.Kathirvel. R.Manian and T.Senthilkumar
 
Subject Power tiller, energy cost, ergonomic, oxygen uptake
 
Description Not Available
The ergonomic aspects of the power tiller are of great importance as working with the power tiller involves considerable physiological strain to the operator. The physiological response of the subject while operating two power tillers with one as walking type (7.46 kW) and the other as riding type (8.95 kW) was investigated. The selected operations included rotary tilling in untilled and tilled fields and transport on farm and bitumen roads. The selected levels of forward speed of operation were 1.5, 1.8, 2.1, 2.4 km h-1 and 3.5, 4.0, 4.5, 5.0 km h-1 for field and transport operations respectively. Three subjects were selected based on the age and weight and screened for normal health through medical investigations. The physiological cost of power tiller operation was computed and the energy cost of work was graded. The oxygen uptake in terms of VO2 max was compared with acceptable workload and the work pulse was compared with limit of continuous performance. For rototilling in an untilled field the energy cost of work varied from 17.13 to 20.09 kJ min-1 for the walking type (7.46 kW) power tiller and 13.95 to 15.43 kJ min-1 for riding type (8.95 kW) power tiller. In thetilled field the values varied from 15.70 to 18.23 kJ min -1 and 13.28 to 14.59 kJ min-1, respectively. The operations were generally graded as "moderate work". The rototilling operation in an untilled field was strenuous as it demanded 9.1 to 10.20 percent and 1 to 6 percent more energy for walking type (7.46 kW) and riding type power tillers (8.95 kW), respectively than in a tilled field. Power tiller with seating attachment resulted in saving of 23 to 30 percent and 18 to 25 percent human energy requirement in untilled and tilled fields, respectively. In transport mode the energy cost of work varied from 10.17 to 11.12 kJ min -1 and 11.32 to 12.82 kJ min-1 with 7.46 kW and 8.95 kW power tillers, respectively. The operation was generally graded as "light work" to "moderate work". When compared to the 8.95 kW power tiller, the 7.46 kW power tiller resulted in savings of human energy requirement of 15.33 to 16.23 percent on farm roads and 4.9 to 11.3 percent on bitumen road. For field operation with the walking type power tiller, the oxygen uptake interms of the olxgen consumption rate (VO2) max varied from 35.30 to 43.93 percent which was above the acceptable work load whereas the values varied from 29.04 to 33.74 percent for the riding type (8.95 kW) power tiller and was within the acceptable workload. During transport mode, oxygen uptake in terms of VO2 max varied from 22.24 to 28.03 percent and the values were within the acceptable limit for both power tillers. The work pulse (Δ HR) varied from 21.08 to 37.79 percent for field operations and 11.42 to 19.88 for transporting operations and were within the limit of continuous performance.
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Date 2021-07-14T08:56:45Z
2021-07-14T08:56:45Z
2007-12
 
Type Research Paper
 
Identifier Binisam, K.Kathirvel*. R.Manian and T.Senthilkumar, 2007. Energy cost of riding and walking type power tiller. Agricultural Mechanization in Asia, Africa and Latin America. 38(1): 55-60
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http://krishi.icar.gov.in/jspui/handle/123456789/47924
 
Language English
 
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Publisher Not Available