Parâmetros técnicos, econômicos e ambientais de máquinas florestais em função de configurações do motor e bomba hidráulica

Abstract

The objective of this research was to quantify the technical, economic and environmental parameters of forest machines operating in different motor and hydraulic pump configurations. The harvester has been configured to operate at engine speed at 2.060; 2,000; 1,950; and 1,900 rpm and hydraulic pump flow rates at 300; 295; and 290 L min-1, totaling twelve combinations. The forwarder was programmed to operate with pump pressure at 240; 235 and 230 bar and an engine speed of 1,550; 1,475 and 1,400 rpm, totaling nine combinations. The technical analysis comprised the study of times and movements, productivity, hourly fuel consumption and energy demand. Regarding economic parameters, the cost of production was determined. The environmental impact was measured by determining the amount of carbon dioxide emitted. Combinations with engine speed at 2,060 rpm and pump flow at 295 L min-1 and engine speed at 2,000 rpm and 300 L min-1 pump flow ensured the best technical, economic and environmental results for the harvester. Regarding the forwarder the best results were obtained when the machine was programmed to operate with pump pressure at 240 bar and engine speed at 1,475 rpm.