Comparison of the Efficiency of Selected Hydraulic Sources

This article compares the efficiency of three selected hydraulic sources: a fixed displacement pump with a relief valve, a pressure compensated pump, and a pump with Load-Sensing control.The study investigates how pump speed reduction impacts the efficiency of each source.An experimental circuit was used to measure input power and output power, evaluating efficiency across varying flow rates and pressure drops.The analysis determines which hydraulic source exhibits the highest efficiency and whether efficiency gains from speed reduction are consistent across different loads.