Hydraulic Accumulators in Practice: Selection, Sizing, and Installation
Dr. Tadej Tašner, univ. dipl. inž., HAWE Hidravlični sistemi d.o.o., d. o. o., Štore
Ventil 32 (2026) 5 / Review articles / Technical article – 1.04
Abstract:
Hydraulic accumulators are key components in fluid power systems, enabling hydraulic energy storage, pressure stabilization, compensation of volume variations, and balancing of dynamic loads. Their functionality and effectiveness depend largely on the correct selection of accumulator type, appropriate sizing, and optimal integration into the hydraulic circuit. This paper presents the fundamental principles of hydraulic accumulator design and application, with emphasis on selection criteria, precharge pressure determination, sizing according to functional requirements, and compliance with safety requirements.
Approaches for integrating accumulators into hydraulic systems are presented with the objective of achieving efficient energy storage, reducing peak loads, dampening pressure pulsations and shocks, and improving system dynamic response. Particular attention is given to maximizing the utilization of the accumulator’s effective volume and preventing common design errors, such as exceeding the permissible compression ratio, incompatibility of materials with the hydraulic medium and operating temperatures, and neglecting accumulator lifetime limitations.
Using thermodynamic models and practical application examples, the paper demonstrates the impact of properly selected and sized accumulators on the energy efficiency, reliability, and operational safety of hydraulic systems. The findings provide practical guidelines for hydraulic system design, where the accumulator is not considered merely an auxiliary component, but an active element for optimizing the performance and functionality of the entire system.
Keywords:
Hydraulic accumulators, Fluid power systems, Energy storage, Pressure stabilization, Load balancing, Circuit integration, Selection criteria, Sizing, Pre-charge pressure, Functional safety, Engineering guidelines
Copyright (c) 2026 Tadej Tašner
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