The Problem

Bradford Teaching Hospitals NHS Foundation Trust wanted to save energy as part of an initiative which includes the ongoing development of a long-term policy to conserve energyand minimise investment costs by optimising the phased replacement of older motors throughout Bradford RoyalInfirmary (BRI) and St Luke’s Hospital.

Sentridge’s Solution

Benefit at Bradford
The variable-speed drives are delivering savings of more than £26,000 a year to the Bradford Teaching Hospitals NHS Foundation Trust and they are saving more than 200,000 kWh and 110 tonnes of CO2 per year.

The Full Story

ABB standard drives for HVAC, rated from 0.75 kW to 30 kW, were fitted to 28 air handling units (AHUs) across the BRI and St Luke’s sites in critical areas such as theatres and infection control zones. The load on the AHUs varies with the outside temperature, but the biggest difference is between day and night. The fans typically run at half speed at night to conserve energy, reduce noise and minimise wear. The drives were installed by ABB’s authorised value provider, Halcyon Drives from Leeds, who carried out the project in four phases.

The ear, nose and throat department at BRI was first, followed by maternity. Then St Luke’s plant room 1 and finally plant room 2 Each drive is connected into the wider building management system (BMS) using the ABB HVAC drives standard protocol BACnet.

Always service your drives to extend the lifetime and maintain the efficiency of your Drives investnent.