Data Capture and Analysis

1. Data Capture and Analysis Commercial Sector Case Studies Dr Paul Bannister

2. Data Capture and Analysis: Overview • Progressive data capture • Case Study – Individual Building • 50% emissions reductions in 2 years • Case Study – Colonial First State Global Asset Management • 30% emissions reduction in 4 years

3. Progressive Data Capture • Low grade data capture is sufficient to yield significant savings • Higher levels of data capture enable further savings • EEO encourages a progressive approach to data capture • Illustrated in the following case studies

4. Data Sources for Commercial Buildings Energy Billing Data, Use/Scale Information Low cost/high return, limited insight BMS Operational Data Mid cost/high return, insight into causes Sub-metering Data High cost/mid return, insight into effects

5. Case Study: Freshwater Place • Original performance 2.5 stars NABERS Energy • Design target 4.5 stars • Building performance issues addressed through • Detailed monitoring of BMS variables • Known measures from other sites • Detailed monitoring and targeting

6. Detailed Monitoring of BMS variables

7. Evidence of box failures Detailed Monitoring of BMS variables

8. Detailed Monitoring of BMS variables

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11. Poor performance region Document Title

12. Initial Upgrade Works • BMS control upgrade • Elimination of faulty night purge • Improved fan, terminal control • Increased dead bands • Improved pump control • VSDs on key pumps • Tenant condenser water loop upgrade All works driven by monitoring and/or precedent from other sites

13. Initial Results • Building performance improved to 4 stars • Good but not good enough! • Detailed metering review and benchmarking exercise undertaken • Benchmarks for each submeter • Further savings measures • Widen temperature control deadband • Tune lifts • Recommission lighting control

14. Sample monitoring plots Document Title

15. Sample monitoring plots Document Title

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17. Sample monitoring plots Low load chiller control tuning Document Title

18. Sample monitoring plots Document Title

19. Sample monitoring plots External lighting control improvements Document Title

20. Final Results Approx 50% reduction in emissions Saving 2300MWh electricity p.a. (41%) Saving 9000GJ gas (78%)

21. Case study – Colonial First State • Colonial First State Global Asset Management – Australia’s 2nd biggest property owner • ~$18Bn property under management in Australia • This case study – CPA portfolio ($~4Bn, ~550,000m²) • Office buildings 21

22. Case study – the program, take 1 • 1sttake, pilot of 8 buildings in ACT and NSW: • Rate building • Produce NABERS improvement plan • Implement • Wait 1 year and re-rate 22

23. Case study – the program, take 1 • Opportunities were: • Maintenance issues • Old, inefficient plant • Controls and BMS • Mixed use inefficiencies • Attractive paybacks (< 5 years) • Limited results after 1 year • Budget cycles • Technical execution issues 23

24. Case study – Lessons from Take 1 Weak energy monitoring/management process hinders understanding Basic measurements enhance communications and directly identify savings Basic assessments demonstrate economic potential for improvements Basic monitoring identifies areas for program redesign 24

25. Case study – the program, take 2 • Annual rating • 3 yearly NABERS improvement plan • Implementation reviews • Targets • Asset Efficiency Program Iterative, monitored program integrated into management cycles 25

26. Case study – the program, take 2 Annually Revised Performance Targets • Portfolio target set • Individual site targets set to meet portfolio target • Upgrade plans integrated with budgeting cycle • Improvement plans progressively updated • Implementation reviews on a regular basis to ensure works meet expectations 26

27. Case study – the program, take 2 Asset efficiency program (14 buildings so far ~50%) • “Strategic” detailed energy sub-metering • Designed to give a live energy mass balance 27

28. Case study – the program, take 2 • Asset Efficiency Program needed to deliver the next phase of improvements • Similarly to fine tuning of Freshwater Place Detailed monitoring/metering with inter-site comparisons delivers high level energy savings 28

29. Results 29

30. Results 30

31. Case study – Results So far the client has achieved: • 30% reduction in greenhouse intensity • Improvement of portfolio average energy rating from 2.6 stars (CY2008) to 3.9 stars (CY2010) • Success in procuring funding to achieve these goals (Green Building Fund) Key elements of EEO structure used to deliver significant and ongoing energy savings 31

32. Conclusions • EEO sets out a range of data analysis and capture requirements • These integrate with progressive improvement of building performance • Start simple, build capacity • Case studies show that these approaches work in the commercial sector 32

33. Questions? Exergy Australia PO Box 546 Belconnen ACT 2616 ph +61 2 6257 7066 paul@xgl.com.au www.xgl.com.au Dr Paul Bannister