Результаты производствнных исследований использования моторного биотоплива

Abstract

At the Lithuanian Institute of Agricultural Engineering experiments were carried out on pure rape-seed methylester (RME) and its mix with mineral diesel (M) application in tractor units of different power. The dynamics of comparative fuel rates was determined for 18 kW tractor unit at maximum tractor tractive force Pmax operating under the same conditions with mineral diesel, RME and their mix. The trials were carried out driving at four gears, with 1,2 to 2,7 m/s working speed. The lowest comparative traction fuel rate was achieved at maximum traction power of tractor Pmax 11,1-12,2 kN and working speed vd 1,8-2,1 m/s, correspondingly: M – 210 g/kWh; M+30  RME - 213 g/kWh; M+50  RME- 229 g/kWh; 100  RME- 248 g/kWh. Obviously, when tractor unit operated at optimum load on pure RME, fuel rate increased by 12  compared with mineral diesel. Operating on mixes containing 50  and 30  of RME the fuel rate increased by 5,8  and 3,9 , correspondingly. Comparative fuel rate was also determined for 58 kW power tractor unit at maximum traction power of tractor Pmax and nominal engine acceleration mode under the same conditions as mineral diesel, RME and their three mixes. The trial was performed at 1,5 to 2,7 m/s working speed of the tractor unit. The minimum comparative fuel rate of the tractor unit was registered at the maximum traction power of tractor Pmax 31,5-32,4 kN and working speed vd = 2,3-3,4 m/s, accordingly: M – 451 g/kWh; M+30  RME - 469 g/kWh; M+50  RME - 478 g/kWh; 100  RME - 505 g/kWh. Thus, when 58 kW tractor operated at optimum load on 100  RME, the comparative fuel rate increased by 8,9  compared with mineral diesel. Operating on mixes containing 50  and 30  of RME the fuel consumption increased by 6  and 4 , correspondingly. Similar dependencies were obtained in experiments on comparative fuel rate of the tractor unit with 151 kW tractor