Product category:
Industrial Drives/Controls
News Release from: ABB Automation Tech (Drives and Motors) | Subject: Variable speed drives
Edited by the Engineeringtalk Editorial
Team on 28 February 2003
Drives provide reliable HVAC in the City
Controlling airflow with drives, instead of using variable pitch fans, has helped improve the reliability of the HVAC system in one of the City of London's architectural landmarks.
Controlling airflow with ABB drives, instead of using variable pitch fans, has helped improve the reliability of the HVAC system in one of the City of London's architectural landmarks, the 55 Bishopsgate building "An upgrade was needed as the fan impeller units had worn and were causing numerous breakdowns", comments Ian Cannell of CSM UK, the company that provided the solution on behalf of the property owner, Deka Immobiliem
This article was originally published on Engineeringtalk on 9 Nov 2001 at 8.00am (UK)
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"Stiff components within the fan impeller units would cause the positioning actuator to come under severe strain, damaging drive gearing and burning out control boards within the actuator.
On several occasions the actuator had to be replaced, at a cost of GBP 800".
"Spare parts were also becoming hard to find and often had to be transported from continental Europe, causing severe downtime, up to eight months.
With no air conditioning on the affected floor, the tenants were then expecting a refund, as they were not receiving air conditioning as per contract".
"We contacted CSE Industrial Electrical Distributors, an ABB dedicated HVAC partner.
They supplied 17 ABB variable speed drives, with IP54 enclosures, 14 at 15kW, one at 11kW and two at 22kW", Cannell says.
The impeller units were locked in optimum flow position and two variable speed drives were installed on each floor, matching the airflow requirement by varying the motor speed.
All works were performed out of hours over a period of weekends.
"The drives have radically reduced maintenance by improving the reliability of the system.
The system also draws less energy now that the fan speed is controlled by a variable speed drive", Cannell adds.
"CSE were chosen for their knowledge of the industry.
We have an excellent relationship with CSE and have been using their equipment for many years".
The 55 Bishopsgate building is a city landmark prominently located next to Tower 42 (formerly NatWest Tower) and 99 Bishopsgate.
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