Enginuity Power Solutions was contacted by Stuart Sypkes, Director of Propery at 85 Macquarie Street, Hobart, with a goal to increase the reliability of current (aging) HVAC operations as well as reduce the energy demand, thus increasing the overall energy efficiency of the building, currently home to around 250 workers on any given day.
Working with Chris Cheong, director of A1 Electric Motors, we determined that ABB synchronous reluctance motors (SynRM) and ACH580 variable speed drives (VSD) were the best possible solution for this building infrastructure upgrade. Through analysis, it was also identified that 85 Macquarie Street was eligible to bring their existent motor selection down a size. The supply air fan was originally powered by a 15kW motor, but it was determined that the necessary motor that would be adequate to drive the load was instead an 11kW motor. In turn, this would enhance the system, reduce operating costs and increase energy efficiency.
Upon analysis at the 12 month mark, it’s been found that the equipment upgrade has enabled a 5.1 tonne reduction in annual CO2 emissions. To offset this much carbon you would have to plant approximately 2.5 hectares of trees every year for the life of the asset. That’s equivalent to an area the size of 1.5 Melbourne Cricket Gounds (MCG).
Furthermore, the supply air fan application energy consumption was reduced by a staggering approximation of 40%, and the chilled water pump application energy consumption was similarly reduced by around 35%.
These reductions in energy consumption have resulted in signifcantly lower operational costs and energy bills.
The full article on this project, as written by Natalie Landrito from ABB, can be viewed here
