When a world-leading fan manufacturer wanted to increase the energy-efficiency of their client’s AHU plant, they turned to Gibbons.
Site surveys and energy audits proved the potential for reducing electricity consumption, so Gibbons were awarded a package of works on the 43,000-ft² plant which contained air handling units housing 16 fans. Gibbons installed 16 new variable-speed drives with special enclosures, mounted adjacent to each AHU. These were fed and cabled to new IP65 ABB steel isolators. The mains power supplies were modified and a new multicore cable run from each unit to the motor control centre panel.
All works were undertaken outside of regular hours in order to minimise disruption, with the variable-speed drives programmed and set to work as each AHU was completed.
The building is now fitted with a complex building management system that provides an automatic signal to each drive, which has enabled substantial energy savings because during periods of lower building occupancy the VSDs run the fan speed down.
By nature of this type of upgrade, the number of moving components within the fans and variable air volume system is significantly reduced, making them virtually maintenance free.