نویسندگان
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
In this study, to investigate the tractor performance parameters, a Massey Ferguson ??? tractor was equipped with liquefied petroleum gas and diesel fuel system. The study was based on three steps: (i) equipping the tractor with dual fuel systems, (ii) evaluating on asphalt road (bitumen) and (iii) disk operations on a farm. The heavy disk plow was performed at working depth of ?? cm. The results were analyzed by factorial experiment based on randomized complete block design. The study was conducted by ? levels of fuel combination (D???, D??, D??, D?? and D??) and a forward speed of ?.? and ? km/h in asphalt and ? and ?? km/h in farm with engine speed of ???? rpm. The highest and lowest diesel fuel consumptions were obtained at D??? and D?? treatments with ?? and ?.? l/h, respectively and the highest and lowest LPG consumptions were obtained in the D?? and D?? combination with ?.? and ?.? kg/h, respectively. The drawbar power in various combinations of fuel was not changed significantly. By increasing the ratio of LPG and diesel fuel combination, specific fuel consumption was reduced from ?.? to ?.? l/kWh. In two farm and asphalt conditions, the best combination of fuel was obtained in D?? that showed the highest power drawbar and the lowest specific fuel consumption. In this combination, the overall energy efficiency of tractors was approximately about ??%.
کلیدواژهها [English]
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