PNW Rooftop Unit Working Group - RTUG – Rooftop Unit Research Project Phase 4

1. PNW Rooftop Unit Working Group- RTUG –Rooftop Unit Research Project Phase 4 August 12, 2010

2. RTUG Agenda 081210 9:30-9:45: Introductions; Agenda Review; RTUG - A Look Ahead RTUG Work Plan Review 9:45-11:45 Bonneville-Cadmus RTU Research Work • Results from BPA annually monitored RTUs • Preliminary winter fan schedule persistence results • Preliminary heat pump heating energy results • Preliminary RTU gas-pack heating energy results • Preliminary economizer results • Preliminary annual signature • Addition to the analysis protocol of min/max supply air temperatures • Analysis improvements for minimum and economizer airflow analysis • Preliminary error band observations • Brief description: SAS data management/analysis tool 11:45-Noon Status: Regional RTU Research Results Databasehttp://www.nwcouncil.org/energy/rtf/studies/ongoing/rtug/2009_rooftop/Default.aspx 12:00- 1:00pmLunch 1:00-1:15Web-enabled Thermostat Research: monitoring status Months 13-24 data acquisition scenario 1:15-1:30Energy Trust of Oregon RTU O&M Update 1:30-2:00 Premium Ventilation VSD Measurement Results: “The Turn of the Screw…” 2:00-2:45 Policy topics: a) RTU airflow service issues, b) measure persistence, c) measure life 2:45-3:30 Elements of Regional RTU Strategic Plan 3:30pmAdjourn [Breaks taken as needed]

3. RTU Research Outputs --for October 27 RTUG final meeting: • Draft annualized savings methodology with separate characterizations of annual operation for summer and winter • Data block interval analysis • Recommendations regarding fan schedule persistence • Site temperature vs. TMY data • Additional persistence analysis • Billing/signature analysis for selected sites • Measure life implications from the data

4. RTUG Work Plan • Actively promote collaboration within/outside the region on EM&V protocols, RTU efficiency research • Review BPA research results and assist in drafting the proposed annualized savings methodology • Assist in implementing the Regional RTU Research Results database – RRRR or R4 database • Lead the RTUG through a process to scope technical and related elements of a regional RTU Strategic Research Plan • Identify options for equipment redesign, deeper retrofit and early replacement

5. Current RTUG Schedule • NBI contract with NPCC/RTF through November 2010 • 3 RTUG meetings: • May 26 Aug 12 October 27 • RTF Nov 2 • Next steps…

6. RTU Strategic Plan Elements • Technical Assessment • Programmatic • Advocacy/Collaboration

7. Technical Assessment RTF to maintain functional data repository with open access. Add appropriate data sets and analytical results as available from Avista, Idaho Power, Puget Sound Energy, Premium Ventilation Project, Pacific Northwest Laboratory, BPA Web-enabled thermostat project, and others in and outside the region • Develop a research scope/budget for establishing and extending a low cost monitoring protocol on a set of RTUs for up to 60 months. Candidates should chosen through operating RTU service programs • Track persistence of performance for all components; track maintenance costs • Whole building conditions and operating changes substantially documented • Active customer/HVAC contractor contact with education/training for both groups • Develop a research scope/budget to establish RTU measure life values • Reconciliation between modeling and metered result inputs to modeling • Whole building data analysis • Lower cost RTU field monitoring • Premium Ventilation Package: Near-Term + Extended Function Testing and Analysis • Economizer research program including DCV interaction • Test of web-based RTU control and performance monitoring to determine impact on building operator schedule management using the monitoring information • Improve DOE2/eQUEST RTU calculations

8. RTF RTU Challenges • Minimum air flow: - technical: field measurement & service protocol - building code requirement - program protocol - program benefit-cost issue • Measure life: 6th Plan = 18yrs comp/5 yrs O&M • Operating (measure/system?) persistence: ?

9. Programmatic Additional Measures • Add economizers • Controls: Premium Vent Package, other? • Demand Controlled Ventilation (DCV) • FDD/performance monitoring • ECM/VSD • Gear-driven economizer actuators • Airflow/ventilation including outside air damper issue • Other? Market Impacts/Transformation • Customer education • HVAC contractor/distributor education/training • Quality Installation/Quality Maintenance standards New RTU products: Lennox Energence, H80 Hybrid RTU Early RTU Retirement: What is the size of the regional benefit?

10. ETO Tune-up Options (Office/Retail)

11. PNW Collaboration/Advocacy

12. Open Collaboration/Advocacy

13. What’s Wrong & Right with this Picture? Controller W5469 - OLD Damper Actuator Does snap disc input rush current[ >20mA] burn out the motor prematurely? Whiz Bang Controller -W7220 - NEW Whiz Bang Digital Sensor – C7660

14. Outside Air Sensor Enclosure

15. Collaboration/Advocacy • Advanced Rooftop Unit (CA PIER + 3ET) • Publish performance curves • Snap disc replacement • Outside air sensor enclosure/placement • Climate optimized RTU standards • RTU FDD w/remote comm -CA Title 24 • Rethink/Redesign – Proctor Engineering Group

16. Package Unit Standard

17. Package unit as received

18. HDAC Package Modifications

19. Package unit blower revisions(not final evaporator coil or coil location)

20. Advocacy/Collaboration-1 • Labels on the suction, discharge, and liquid lines (for multiple compressors units) • A high-pressure refrigerant port located on the liquid line; low-pressure refrigerant port located on the suction line • Pressure plug-in ports accessible from outside of the condenser fan plenum (where compressors located within the condenser fan plenum) • Controls to adjust the minimum outside air position accessible with air plenum panels in place. • Tighten the box/dampers: ASHRAE

21. Advocacy/Collaboration-2 • The following sensors permanently installed to monitor system operation • Control system capable of displaying the value of each parameter at the at the unit, and/or t-stat and/or through a remote gateway: • Refrigerant suction pressure/temperature • Liquid line pressure/temperature • Outside air temperature/air relative humidity • Return air temperature/relative humidity • Supply air temperature/supply air relative humidity • Condenser/evaporator air flow • Economizer performance

22. Advocacy/Collaboration-3 CA T24 RTU FDD Low airflow Low/High refrigerant charge Sensor out of range or failed Compressor short cycling Economizer not functional/optimized Performance degradation Non-occupied operation

23. Next to the last research steps…. • Draft annualized savings methodology with separate characterizations of annual operation for summer and winter • Data block interval analysis • Recommendations regarding fan schedule persistence • Site temperature vs. TMY data • Additional persistence analysis • Billing/signature analysis for selected sites • Measure life implications from the data

24. RTUG Outcomes • Proposal to the RTF for an annualized savings estimation methodology • Recommendations to the RTF on RTU-related technical/analytical issues • Recommendation for an RTU Forum-scope/national? • Recommendations to NPPC/NEEA/BPA for RTU-related market transformation and technical standards advocacy • Final report of Phase 4