Department of Agricultural Engineering, Faculty of Agriculture, Trakia University, 6000 Stara Zagora, Bulgaria
(Manuscript received 14 June 2023; accepted for publication 15 November 2023)
Abstract. The paper analyses the energy consumption parameters of three grain harvesters for harvesting wheat. It has been found from the studies that the nominal throughput of the two harvester models K1 and K2 is very close, 7.88 kg/s on average, while for the third harvester K3 it is 9.33 kg/s or 16% higher than the two harvesters. In addition, the direct energy consumption of the observed three harvester models has been established, which averaged 312.57 MJ/t. The consumption of diesel fuel for the harvest of 1 ton of wheat with the harvesters has been determined, and the average consumption was 7.46 kg/t. The average total energy consumption of the three grain harvesters has been determined (1.19 GJ/t), ranging from 1.15 GJ/t to 1.24 GJ/t. From the obtained results, it can be seen that the lowest result has been obtained with harvester K3, since it has the largest working width of the header and the unloading of the grain hopper takes place while moving.