Fluid Power: Paving the way for renewable

26 November, 2024

Advances in fluid power technology are helping to address these inefficiencies. Variable speed drive (VSD) pumps, for example, have been developed to adjust their output based on demand, as opposed to traditional pumps that operate at a constant speed regardless of the workload. This allows for more efficient use of energy by only providing the necessary power for a given task. VSD pumps not only reduce energy consumption but also extend the lifespan of hydraulic components, as they experience less wear and tear when operating at lower speeds.

In addition to VSD pumps, modern hydraulic fluids are being developed to reduce friction and improve heat dissipation, which helps minimise energy losses within the system. However, the broader adoption of energy-efficient components across industries will be crucial for fluid power systems to become more compatible with renewable energy sources.

The role of biodegradable hydraulic fluids

Environmental concerns also extend to the hydraulic fluids used in fluid power systems. Traditional hydraulic fluids are often petroleum-based, which poses a risk to the environment if leaks or spills occur. Hydraulic leaks are a common issue, particularly in mobile systems, and can result in soil and water contamination. To mitigate these risks, biodegradable hydraulic fluids have been developed from renewable sources that break down more easily and are less harmful to the environment.

While biodegradable fluids offer clear environmental benefits, they also come with certain trade-offs. These fluids can be less effective in extreme operating conditions, such as high temperatures or high-pressure applications, which are common in industrial environments. As a result, the choice of fluid must be carefully considered depending on the specific requirements of the system. Although biodegradable fluids are becoming more popular, their performance limitations in certain contexts mean they are not yet a universal replacement for conventional hydraulic fluids.

Digitalisation and the role of IoT In addition to advances in hardware, digitalisation is transforming the efficiency and sustainability of fluid power systems. Smart sensors, data analytics, and the Internet of Things (IoT) are enabling more precise monitoring and control of hydraulic and pneumatic systems. These technologies allow for real-time tracking of system performance, enabling predictive maintenance and optimisation of energy usage. By monitoring the condition of components such as pumps, valves, and hoses, sensors can detect inefficiencies or potential failures before they cause significant problems, reducing energy waste and minimising downtime.

The integration of digital technologies is helping to drive the adoption of more efficient fluid power systems that are better suited to the demands of renewable energy. These smart systems can automatically adjust their operation based on real-time data, ensuring that energy is used as efficiently as possible. Digitalisation is also facilitating the development of more flexible, modular systems that can be more easily adapted to different energy sources, including renewables.

The role of fluid power in renewable energy sectors

While the integration of renewable energy into fluid power systems faces challenges, there are already some promising applications. One of the most notable is in the offshore wind sector, where hydraulic systems are used to control the pitch of turbine blades and to adjust yaw mechanisms, ensuring optimal energy capture. Hydraulics are also crucial in the construction and maintenance of offshore wind farms, particularly for subsea operations and lifting heavy components.