Insights...

Don't dwell on it! Hydraulics cost you energy while stationary...

Reduce energy consumption during idle or dwell times.

One of the single largest energy consumption reduction factors of electrical power over fluid powered actuator systems is the dwell time savings.

The energy required from a fluid powered system is determined by the requirements of the power unit to deliver the required pressure and flow to its actuators, at any given moment, and when the whole system is in activation or in a state of readiness.

A hydraulic-powered control system consists of the actuators connected via hydraulic tubing, hoses, pumps and a fluid reservoir. Typically an electric motor is used to power a pump that operates at a constant speed. This pump is often a fixed volume positive displacement unit that requires the same amount of flow throughout all operating conditions. Any surplus flow not required at a given point would be recycled back to the reservoir. These systems are designed to avoid pressure drops and so continue to consume energy even when the duty cycle does not require any actuator movement or load-bearing.

Michael Socks states that in operations such as injection moulding, these dwell times can account for up to 40% to 50% of the entire cycle time. 

In his paper regarding injection moulding machines, Socks identifies four main areas of efficiency gains possible for electrical actuation over hydraulic.

  1. Reduced energy consumption during idle operation
  2. Elimination of internal leakage losses within hydraulic components
  3. Elimination of frictional losses within hydraulic lines
  4. Reduced cooling requirements

All of these are worth further investigation for the majority of applications currently using hydraulics, but in Socks' testing, the dwell time alone yielded energy savings of 74% when switching to electrical actuation. And this is from 2005!

Read the full report here - The Promise of All-Electric Injection Molding Machines: A Promise Kept?

 

←    Return to Insights

Olsen Actuators & Drives awarded Cyber Essentials Plus

Olsen Actuators & Drives are delighted to announce the recertification of the...
Read Full Story

Visit to the UK Space Conference 2023, Belfast!

As members of UKSpace (the official trade association of the UK space...
Read Full Story

Griffon Hoverwork site visit

We were delighted to be able to visit one of our longest-serving customers in...
Read Full Story

Olsen join the British Gear Association!

We have joined the British Gear Association! THE BGA is the UK Centre of...
Read Full Story

10 years at DSEI for Olsen Actuators!

DSEI 2023 was our best yet and a great way to cap off a decade of attending...
Read Full Story

Featured in the DSEI 2023 Preview Brochure!

We are delighted to be featured in the Preview Brochure for the upcoming 2023...
Read Full Story

Prosecco in the Park!

Sci-Tech Daresbury is a fantastic place to work. The facilities and work that...
Read Full Story

LCR Grad Scheme - Meet the Employer

As we grow, our commitment to supporting the next generation of talented...
Read Full Story

Space Comm 2023

Olsen Actuators attended the Space Comm Expo at Farnborough International...
Read Full Story