South Western Sydney Local Health District
The HFO revolution
Case Studies // South Western Sydney Local Health District
Overview
With the phase-down of the HFC refrigerants and the ecological appeal after years damaging the ecosystem in different ways, it became essential to find solutions for air condition systems with high efficiency and ecological footprint.
​
The management team at South Western Sydney Local Health District led by Ashwin Singh, the District Engineer, was faced with the task of replacing ageing central cooling plant equipment at 4 hospitals in their region. The chillers were well and truly at the end of life stage.
Solution
Aiming new technologies and high levels of efficiency, the hospitals, together with DSA Consulting, a trusted Sydney-based mechanical engineering company, selected the best equipment for the job. After an exhaustive tender analysis, the decision to select the QUANTUM Oil-free Magnetic Bearing Centrifugal Chillers using an HFO refrigerant for this project was made.
The Solution involves chillers with COPs higher than 6.0 and IPLVs higher than 10.50 providing excellent full and partial loads efficiencies with multiple compressors and large redundancy. Maintaining existing electrical supplies was a must on this project and high efficiency QUANTUM chillers with 5Amps low inrush current on start-ups were the solution. The use of HFO1234ze was the choice in order to meet government commitments of the Paris accord and to meet the criteria for choosing a long-term refrigerant with Zero ODP and GWP<1.
​
In total, 11 water cooled QUANTUM high efficiency oil-free magnetic bearing centrifugal chillers with GWP<1 have been installed and are operating very efficiently and reliably across Liverpool, Camden, Bankstown, and Fairfield Hospitals. With 16.5MW of cooling capacity installed, this is one of the largest HFO installations in Australia.
Process
As a distributor of QUANTUM Oil-Free Magnetic Bearing Centrifugal Chillers, we were able to work with the chiller manufacturer (Engie Refrigeration in Lindau, Germany) to ensure chiller deliveries were able to meet the stringent delivery requirements. Several possibilities and solutions were submitted to the DSA consulting team evaluation who developed the best configuration that suits the hospitals and the high requirements of this project.
