Data Centre EcoDesign

Data Centre Construction

Data Centre Cooling

Data Centre Fire Suppression

Data Centre Technical

Data Centre Engineering

Data Centre Management

Data Centre Micro Datacentre & Hub Rooms

  • EcoDesign

    EcoDesign™ represents Workspace Technology’s commitment to help clients reduce their carbon footprint through the deployment of energy efficient technology and design.


  • Construction

    Creating the space through planning, design, installation and data centre construction services.


  • Cooling

    Efficient cooling and airflow deployed through a range of data centre air conditioning, free cooling technology, aisle containment and airflow management.


  • Fire Suppression

    Mission critical environments through the installation of fire detection and fire supression systems.


  • Technical

    Technical infrastructure & technology including structured cabling equipment racks & accessories, communications and related technical services.


  • Engineering

    Powering architecture through LV switchgear, mechanical and critical distribution, PDUs, power generators, UPS systems and intelligent rack distribution.


  • Management

    Proactive management, environmental monitoring & security incorporating data centre management, environmental and physical security, monitoring and energy management solutions.


  • Micro Datacentre & Hub Rooms

    “Micro” Data Centre and “Repeatable” Hub Rooms solutions are designed to address the requirements of small server rooms, comms rooms and wiring closet environments.


Application of Economy Mode (eco-mode) in Data Centre Environments

Workspace Technology’s design team is constantly looking at ways to further reduce the PUE associated with data centre design. As part of this drive we encourage data centre operators to consider the deployment of more economic modes of operation for UPS systems.

What is Economy Mode?

image40-207x300Economy Mode or eco-mode functionality is the term used when UPS loads are run from the bypass instead of the inverter. This is the inverse of normal operation where the UPS bypass is waiting to accept the load if there are power quality problems.

UPS systems with eco-mode options are designed to provide the critical load with sufficient voltage (supply voltage should never be zero for longer than 20ms) to avoid load disruption.

Because in eco-mode the UPS is effectively off line a system efficiency’s of 98-99% can be achieved. The UPS system will constantly monitor the mains supply. If mains power deviations are monitored the system will automatically revert in on-line mode in typically less than 4ms.

Why deploy eco-mode?

The higher the UPS efficiency the lower the losses which in turn leads to a lower total cost of ownership and improved data centre PUE.

Typical ultra-high efficiency double-conversion UPS will typically performance at 96% at 50% load. This compare to >98% when the UPS is operating in eco-mode.

With the anticipated power cost inflation that is likely to take place over the 10 to 15 year life of the UPS eco-mode savings can be significant.

Click the tables to view them at full size.



As can be seen over a 10 year period there are significant savings the can be made even with just 2% improvement in PUE.

The effect on a data centre PUE can be 0.025 which is a tangible improvement if the data centre PUE is < 1.20.


Eco-mode Considerations

Implementing eco-mode is typically seen by many operators as an increased risk to the load. A number of area’s should be considered.

Mains Power Quality

When in eco-mode operation if the main monitoring system detects a deviation or quality issue the UPS will be returned to on-line mode. Typically the UPS will be configured to remain in on-line mode until the mains power has been stable for at least 30-60 minutes to prevent oscillation in times of mains instability. In the UK the eco-mode function can be sustained for at least 99.6% of the year however in area’s of power quality eco-mode is not advised.

Transient Voltage Surge Suppression

As good data centre design practice Workspace Technology recommends the installation of TVSS surge-suppression devices at key points within the power distribution scheme. This includes the main incoming panel, intermediately distribution panels and critical PDU’s. The installation of TVSS systems will ensure the critical load is protected from transient over-voltages (spikes) when operating the UPS in eco-mode.

Generator Back up

When emergency generators are implemented it is recommended that an inhibit signal is provided by the generator control panel to latch the UPS into on-line mode until mains failure is restored.
This will eliminate any issues will stability / quality of power and prevent the generator from being exposed to leading power factors that are typical with many critical load profiles.

Non-linear ICT loads and current harmonics

Total Harmonic Current Distortion (THCD) within I.T loads may be as high as 35%. When in online mode the UPS will isolate the mains supply from the effects of the I.T load harmonics. However when eco-mode is enabled, the mains transformer will be exposed to these harmonic effects. Workspace Technology will typically uprate the neutral conductor as a “good practice” design precaution to mitigate and potential issues when eco-mode UPS systems are deployed.

Eco-mode Summary

image63-300x224Workspace Technology recommends any new UPS system should support High-efficiency and eco-mode operation modes. We recommend that data centre operators should consider the configuration of eco-mode to help reduce energy costs and improve the overall PUE ratings. Workspace Technology’s expert electrical design team will ensure appropriate optimized engineering to give peace of mind to data centre operators when eco-mode is implemented.

Return to Riello Uninterruptible Power Supply (UPS) Systems Home Page Return to Engineering Home Page Return to Data Centre Solutions Home Page

Case Studies

View a full list of case studies where we have successfully implemented our solutions for clients across the UK…


Public Sector

Workspace Technology are the partner of choice for many of the UK’s leading public sector organisations…