Rooftop Unit Research Project Phase 4fin

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					  PNW Rooftop Unit Working Group
            - RTUG –

Rooftop Unit Research Project Phase 4
           August 12, 2010
                                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- 1:00pm   Lunch

1:00-1:15 Web-enabled Thermostat Research: monitoring status
            Months 13-24 data acquisition scenario
1:15-1:30 Energy 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
3:30pm Adjourn                                                                  [Breaks taken as
    needed]
              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
                  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
         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…
        RTU Strategic Plan Elements

• Technical Assessment

• Programmatic

• Advocacy/Collaboration
                        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
              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: ?
                        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?
               ETO Tune-up Options (Office/Retail)
    3 or 4 Ton Roof Top Unit                                   Incentive Requirements
1     Install new economizer with DCV controls                   Includes Economizer package, new O/A Sensor, new Two-stage
                                                                 Programmable Thermostat and DCV control, installed and set for maximum
                                                                 energy savings.

2    Install economizer without DCV controls                    Includes Economizer package, new O/A Sensor installed and set for
                                                                maximum energy savings. Existing Programmable Thermostat already has
                                                                Two-stage cooling and is in working condition. DCV controls not warranted
                                                                due to space occupancy.


    5 thru 20 Ton Roof Top Unit                                Incentive Requirements
3     Tune up unit with existing economizer with thermostat      Replacement of existing economizer O/A sensor and thermostat that does
      and sensor replacement.                                    not have two-stage cooling, or that is not programmable. Economizer must
                                                                 work properly after tune up as per Form 180TE checklist. (Damaged
                                                                 dampers, damper linkage and damper motors shall be fixed prior to tuning
                                                                 up if found non-functioning.)

4    Tune up unit with existing economizer with sensor          Replacement of existing economizer O/A sensor only and performing
     replacement only.                                          services per Form 180TE checklist. (Damaged dampers, damper linkage
                                                                and damper motors shall be fixed prior to tuning up if found non-functioning.)


5    Add DCV control to unit w/ existing economizer             Add-on DVC control, CO2 sensor, controller where necessary, and O/A
                                                                sensor. Economizer must be operational and tuned up. Assumes existing
                                                                thermostat is functioning and no new thermostat is needed. (Damaged
                                                                dampers, damper linkage and damper motors shall be fixed prior to tuning
                                                                up if found non-functioning.)

6    Perform all controls and tune up measures listed in 3,4    Add-on DVC control, CO2 sensor, controller where necessary, and O/A
     and 5                                                      sensor, and new programmable thermostat. Economizer must be
                                                                operational and tuned up. (Damaged dampers, damper linkage and damper
                                                                motors shall be fixed prior to tuning up if found non-functioning.)
PNW Collaboration/Advocacy

   RTF-RTUG              BPA 3ET HVAC




                           California
    NEEA




              National
      Open Collaboration/Advocacy
             PNW
           NPCC/RTF             California
          Bonneville/
                               IOUs/SMUD
           3ET + R&D
                                   CEC
          NEEA + EMT              CPUC
              PNL                 WCEC
              ETO               WHVACPA




                                 Southwest
OEM’s/AHRI/CEE
USDOE/ASHRAE
                        NEEP
     What’s Wrong & Right with this Picture?
Controller W5469 - OLD



                                                                 Damper Actuator
                                                            Does snap disc input rush
        Whiz Bang Controller -W7220 - NEW                   current[ >20mA] burn out
                                                            the motor prematurely?




                         Whiz Bang Digital Sensor – C7660
Outside Air Sensor Enclosure
          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
Package Unit Standard
Package unit as
received
HDAC Package Modifications
Package unit blower revisions
(not final evaporator coil or coil location)
         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
           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
          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
      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
                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

				
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