Hydraulic Systems for Renewable Energy

Renewable energy installations rely on equipment that can operate reliably in demanding environments, often with limited access for maintenance. From offshore wind turbines to hydroelectric facilities, hydraulic systems provide essential power and control functions that support safe, efficient operation.

As renewable energy infrastructure develops, renewable energy hydraulics continues to play an important role in equipment design, maintenance and performance. Understanding how these systems are used can help engineers identify suitable components and manage the challenges associated with long-term operation.

Why Are Hydraulics Important in Renewable Energy?

Hydraulic systems use pressurised fluid to transmit power and control mechanical movement. They can deliver high forces through relatively compact components, making them suitable for applications where space, load requirements and environmental conditions influence equipment design.

Hydraulic cylinders, power packs, accumulators, valves, pipework, hoses and fittings can all form part of renewable energy installations.

The specific requirements vary by application, but reliability, fluid cleanliness, component compatibility and effective maintenance are important considerations across the sector.

Wind Turbine Hydraulics

Wind turbines operate in exposed environments and must withstand changing wind conditions, vibration and temperature variations. Hydraulic components are used in several turbine systems, depending on the turbine design.

Blade pitch control

Hydraulic cylinders can be used in blade pitch systems to adjust the angle of turbine blades. Controlling blade pitch helps regulate the energy captured from the wind and can support turbine operation in changing conditions.

These systems need to respond reliably to control inputs. Component selection, hydraulic fluid condition and effective maintenance therefore play important roles in operational performance.

Hydraulic power and control systems

Hydraulic power units, valves, accumulators and associated pipework can support other turbine functions, depending on the design.

Components must be suitable for the operating pressures, temperatures and environmental conditions involved. In offshore installations, corrosion protection and access for maintenance can be particularly important.

For wind turbine hydraulics, engineers should consider not only the initial component specification but also how equipment will be inspected, serviced and replaced throughout its working life.

Hydraulic Systems in Hydroelectric Power

Hydroelectric installations convert the energy of moving water into electricity. Although the water drives the turbine, hydraulic systems can support the control and operation of associated equipment.

Applications may include actuating mechanisms, operating gates and valves, and controlling equipment used to manage water flow, depending on the facility.

Gate and valve operation

Large gates and valves may need to move substantial loads reliably. Hydraulic cylinders can provide the force required to open, close or position these components.

Reliable operation is important because control equipment must function as intended during normal operation and, where designed for that purpose, specific shutdown or emergency procedures.

Power units and accumulators

Hydraulic power units supply the pressure and flow required by actuators, while accumulators can store energy and provide additional hydraulic fluid when needed.

The system must be designed around the required load, response time, operating conditions and safety requirements. Correct accumulator sizing and suitable control arrangements are particularly important where stored energy supports critical functions.

These applications demonstrate how hydro power hydraulic systems can contribute to the reliable control of renewable energy infrastructure.

Other Renewable Energy Applications

Hydraulic technologies can also support tidal and wave energy projects, where equipment must operate in challenging marine environments.

Hydraulic rams, cylinders, power units, hoses and fittings may be used in systems designed to convert movement into useful mechanical action or control associated equipment.

Solar installations can also incorporate hydraulic technology in specific applications, including power units and accumulator-based systems used to operate equipment.

The components required will depend on the system design, so engineering assessment is essential before selecting or replacing equipment.

Key Considerations When Specifying Renewable Energy Hydraulics

Renewable energy installations can be expensive to access and maintain. Selecting appropriate components and planning for long-term reliability can help reduce the risk of avoidable downtime.

Important considerations include:

• Environmental protection: Assess exposure to moisture, saltwater, temperature extremes and corrosion.
• Fluid cleanliness: Suitable filtration and contamination control help protect pumps, valves and other precision components.
• Pressure and flow requirements: Components must meet the demands of the application without introducing unnecessary pressure losses.
• Condition monitoring: Where appropriate, monitoring fluid condition, pressure and component performance can help identify developing problems.
• Maintenance access: Consider how equipment will be inspected, serviced and replaced, particularly in offshore or remote installations.
• Documentation: Maintain appropriate technical records, component specifications and service histories to support future maintenance.

These factors should be considered during system design and throughout the operational life of the installation.

How Hedley Hydraulics Supports Renewable Energy

Hedley Hydraulics supports renewable energy applications with hydraulic products and engineering expertise.

Its offering includes power packs, accumulators, cylinders, pipework, hoses and fittings, with solutions tailored to the requirements of different installations.

The team can help customers discuss component selection, hydraulic system requirements and maintenance considerations for demanding operating environments.

Explore the renewable energy sector at Hedley Hydraulics or contact the team to discuss a project.

Supporting the Future of Renewable Energy

Hydraulic systems remain an important part of renewable energy infrastructure, supporting the movement, control and operation of equipment across wind, hydro and marine applications.

As installations become more technically demanding, careful component selection, effective fluid management and planned maintenance can help support reliable performance.

For engineers working on renewable energy projects, understanding the hydraulic requirements from the outset can help create systems that are practical to maintain and suited to their operating environment.