MBCx Projects – Programs, Process, and Results Soda, Tan, Shields and Wurster

1. MBCx Projects – Programs, Process, and Results Soda, Tan, Shields and Wurster David Jump, Ph.D., P.E., Matt Denny, P.E. Quantum Energy Services & Technologies, Inc. Arch 249X: The Secret Life of Buildings, Oct. 2008

2. Overview This presentation will discuss: • Process and Benefits of Monitoring-Based Commissioning • Differences with RCx • Integration of M&V in RCx • Results from 3 Buildings • Progress on Wurster • Discussion

3. Monitoring-Based Commissioning (MBCx) • Third-Party Energy Efficiency Partnership Program • Funded by public goods charges under auspices of CPUC • Available to University of California and California State University Campuses • One of multiple RCx programs in California: • PG&E Core RCx Program • PG&E RCx Services and Incentives Program • SCE RCx Program • SCE/LA County RCx Partnership (LA County buildings only) • San Diego RCx Program

4. MBCx Project Scope RCx Process Additional MBCx Elements • Planning Phase • Develop M&V Plan (IPMVP or ASHRAE 14) • Add energy metering • electric interval, gas pulse, steam, etc. • systems level (e.g. chillers, AHU, etc.) • Planning Phase • Initial site visit • Review documentation • Identify project requirements • Provide commissioning plan • Investigation Phase • Inventory equipment • Calibrate sensors, conduct PM activities • Develop and carry out functional tests • Identify operational deficiencies • Document costs and benefits to correct deficiencies • Implementation Phase • Install and commission measures • Document improved performance • Hand-off Phase • Provide final report • Provide training • Investigation Phase • Begin monitoring • Energy • Independent variables (OAT, etc.) • Develop Baseline energy model • Implementation Phase • Collect post-installation data • Develop post-installation model • Determine Savings • Hand-off Phase • Establish energy tracking system • Provide periodic savings reports • Address deficient performance

5. Approach • Select measurement boundary • Option C - Whole Building • Option B: Retrofit Isolation (HVAC Systems)

6. Approach • Defining Systems - by ‘Services’ provided • Chilled water system: • Chiller, CHW pumps, etc. • Air handling system: • Supply fan, return fan, exhaust fan • Hot water system: • Boiler, HW pumps

7. Three Case Studies • UC Berkeley • Soda Hall – Computer Science Building, 109,000 ft2 • Tan Hall – Chemistry Building (100% OA), 106,000 ft2 • UC Davis • Shields Library – main undergraduate library, 400,070 ft2

8. Soda Hall • UC Berkeley’s Computer Science Department (24/7 operation) • 109,000 ft2 • Central Plant (2 - 215 ton chillers & associated equipment) • Steam to hot water heating • 3 Main VAV AHUs, • AHU1 serves building core, • AHUs 3 and 4 serve the perimeter, with hot water reheat

9. Soda Hall RCx Findings

10. M&V Approach for Soda Hall • Assessment: • Whole-building electric and steam meters present • EMS that trends all points at 1 min (COV) intervals • 8-month history of data • RCx measures in AHU and Chilled Water Systems • Electric and steam savings • Very high EUI – unsure if can discern savings at whole building level • M&V Approach: • Option B – applied at systems level (electric only) • Option C – whole building level (electric and steam)

11. Soda Hall Affected Systems

12. Define the Baseline Period & Collect Data • 8 months of trended data collected • Baseline period selected to cover widest range of operating conditions ~ 3 months. • Energy use for each system to be totaled each day • Basis for analysis and reporting • “Proxy” Variables on EMCS: • Constant load equipment: measure operating kW • Equipment status becomes proxy for kW • Variable load equipment: log kW and VFD speed • VFD speed signal becomes proxy for kW

13. “Proxy” Variable: VFD speed for kW

14. Baseline Model: Soda Hall • Total Building Electric Building Steam • Peak Period Electric HVAC System Electric

15. Soda Hall M&V: HVAC Systems

16. Soda Hall: Estimated vs. Verified Savings

17. Tan Hall • UC Berkeley’s Chemistry and Chemical Engineering Departments • 106,000 ft2 • Central Plant (475 ton chiller & associated equipment) • Steam heating • 1 Main 100% outside air VAV AHU • 4 100-HP Supply Fans • 4 60-HP Exhaust Fans

18. Tan Hall RCx Findings

19. M&V Approach for Tan Hall • Assessment: • Whole-building electric and steam meters present • EMS that trends all points at 1 min (COV) intervals • 8-month history of data • RCx measures in Chilled Water System and main AHU • Electric and steam savings • M&V Approach: • Option B – applied at systems level (electric only) • Option C – whole building level (electric and steam)

20. Tan Hall Affected Systems

21. M&V Models: Tan Hall Whole Building Electric Whole Building Steam Peak Period Electric Chilled Water System Electric

22. Tan Hall M&V: Whole-Building Electric

23. Tan Hall M&V: Whole-Building Steam

24. Tan Hall M&V: Chilled Water System

25. Tan Hall: Estimated vs. Verified Savings

26. Shields Library • UC Davis Undergraduate Library • 400,072 ft2 • Chilled Water and Steam provided by campus central plant • 2 CHW service entrances, variable volume • 2 HW service entrances • 11 AHU, 3 VAV, 8 CAV • 5 electric meters

27. Shields Library RCx Findings • Savings: no estimates prior to measure implementation

28. M&V Approach for Shields Library • Assessment: • Whole-building meters present: • 5 electric meters • 2 CHW meters (installed as part of project) • 3 HW meters (installed as part of project) • EMS that trends all points at 5 min intervals • RCx measures in AHU, CHW and HW pumps • Electric, chilled water, and hot water savings • M&V Approach: • Option C – whole building level

29. Shields Library: M&V Models Electric Chilled Water Steam

30. Shields Library: 480V Electric Meter Savings

31. Shields Library: Chilled Water Savings

32. Shields Library: Hot Water Savings

33. Costs • Including all costs, project remains cost-effective: • Soda Hall: 1.7 year payback • Tan Hall: 0.7 year payback • Shields Library: 1.0 year payback • Added costs of metering hardware and software did not overburden project’s costs • In private sector – metering costs lower • Existing electric meters • Sophisticated BAS systems • MBCx approach should be viable