Before diving into the energy storage process, it's important to understand the basic components of a hydraulic accumulator. However, under complex practical operating conditions, the performance of. Learn how hydraulic accumulators store energy, manage pressure, and increase efficiency in hydraulic systems through their innovative design and operation. A hydraulic accumulator is a vital component used in hydraulic systems, serving the primary function of storing energy by using a compressible. A hydraulic accumulator is a pressure storage reservoir in which an incompressible hydraulic fluid is held under pressure that is applied by an external source of mechanical energy. The external source can be an engine, a spring, a raised weight, or a compressed gas.