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The Economist Building Achieves 66% Energy Savings

London, UK

Elevator | Power & Motion Technology | By Samantha Lotz | Mar 17, 2014


The Challenge

• The existing DC Motor Generator controlled systems installed in the lift motors in London's The Economist Building were inefficient, consuming 66kWh/day per lift.

• An increasing number of breakdowns resulted in a higher level of maintenance support needed to keep the unreliable system operational. Also, sourcing replacement parts was an issue.

 

The Solution

• Three 85A Quattro AC Elevator Drives configured in permanent magnet motor control operating mode were installed.

 

Results

• Installing Quattro AC Elevator Drives resulted in energy savings of 66% when compared to the previous DC Motor Generator solution.

• Power usage measured by Jackson Lifts was reduced from 66kWh/ day with the previous DC Motor Generator Control to 23kWh/day with Quattro AC.

• Projected energy savings is £1100 per annum per lift.

• The maintenance support required was reduced.

• Elimination of generator decreased noise and
resulted in a cleaner system.

• The new solution ensured less heat and more floor space in the machine room.

• Lift speed increased from 2.5 to 3.5m/second.

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