130 Pitt St, Sydney
In the month of December 2016, one of the buildings from the Buildings Alive program which showed notable results was 130 Pitt St in Sydney. Take a look at its results, and the strategies used to achieve them!
- A-grade commercial office tower
- NLA: 11,022m²
- Floors: 16
- Built: 1987
- Location: Sydney CBD
- Owner: Investa
- Commenced with Buildings Alive’s REF Service: 1 November 2012
A sample day in December
This graph, taken from 130 Pitt’s daily REF messages, shows the reduction in electricity consumption between 8th December 2016 (blue line), a comparable recent day (3rd January 2016, red line), and REF’s expected profile (green line). REF performance monitoring shows a noticeable improvement on 8th December 2016.
Strategies for success
Since starting the service in Nov 2012, 130 Pitt Street’s Facility Management team has been working together with Buildings Alive engineers to improve the building’s performance. The FMs reviewed the REF messages on a daily basis and have effectively utilised them in fine-tunning their control strategies. Significant energy savings were made recently through improvements in strategies, including:
- Improving AHU efficiency by implementing a supply air static pressure strategy, which adjusts the static pressure set points according to building demand. This has greatly reduced fan energy usage.
- Optimising the supply air temperature reset strategy by regulating the minimum supply air set point value, which reduces cooling energy consumption and also improves chiller performance.
- Implementing an optimum start control strategy so that the building achieves comfortable indoor conditions by the start of occupancy time, not before it.
- Introducing a staggered start control strategy to avoid the AHU and chillers ramping up to 100% load on start-up.
Long term performance
When looking at long term performance, 130 Pitt Street has saved a total of $18,342 from its electricity bills, and 91 t.C0₂-e in greenhouse gas emissions from Oct-2014 until now. It is impressive to see that the savings are quite significant even compared to the new base line built from Oct-2013 to Oct-2014.
These results can be seen in the graph of energy usage (as compared to baseline performance) from Oct-2014 until now. Lines in red represent an increase in energy usage compared to baseline, and lines in green represent energy savings.