RECOM 2004 CANMET Energy Technology Centre

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RECOM 2004CANMET Energy Technology Centre

• A Workshop on Recommissioning
• The Process
• By Tudi Haasl

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What We Will Cover

• Cx Terms and RCx Objectives
• The Process
• Some Case Studies
• Persistence Issues
• Resources
• Questions
• Overarching lessons learned

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Commissioning Terms

• Commissioning (Cx) for New
• Existing Building Commissioning or
  Retrocommissioning (RCx)
• Re-commissioning (Re-Cx) is a persistence
  strategy
• Commissioning Authority
• Commissioning Agent
• Commissioning Provider

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Operation and Maintenance (OM)

• Maintenance is about the repair, cleaning and
  lubing of the equipment (primarily physical)
• Operation is about schedules, energy efficient
  control strategies, and sequences of operation
  (primarily mental)

Capacity
Performance
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What is RCx?

• An event that applies a systematic process for
  improving an existing buildings performance.
• Focuses on the O (Operations)
• Encompasses integration issues
• It may include developing new or updating
  existing building documentation to reflect the
  current operating requirements
• May be done alone or in concert with a retrofit
  project
• Has typical energy cost savings between 5 and
  20 with lt 2 year simple payback

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Typical Retrocommissioning Objectives
Lesson not all building have operating staff

• Update or create new owner operational
  requirements to reflect current needs
• Optimize building performance to meet owners
  goals for the project
• Train operating staff throughout the course of
  the project
• Develop persistence strategies (e.g.
  Recommissioning strategies)

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Common Building Problems
Lesson Overcoming myths such as comfort
complaints will take care of operational problems

• Energy Management Systems have improper or
  incomplete programming and sparse documentation
• Equipment and lighting schedules are not
  optimized for current operating conditions
• Air and water flow problems result in too much or
  too little ventilation
• Equipment functions poorly or not at all
• Current building documentation is missing or
  incomplete
• Equipment and instrumentation are not properly
  marked

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Benefits of RCX

• The owner obtains systems and equipment that
  operates based on present conditions and owner
  and occupants needs and requirements
• Obtaining these benefits also
• Improves the environment
• Increases the bottom line

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Retrocommissioning Cost/Savings

• From a Study of 44 Buildings

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What Influences the costs?
Lesson Very broken buildings are not good
Candidates - unless cost is no object

• Complexity
• Simple Offices vs. High Tech Labs
• Size and Number of Buildings
• Single building vs. Campus
• Objectives, Scope and Budget
• Narrow Target vs. Whole Building
• Full process vs. partial process
• Condition

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Process
Lesson Pricing is done twice

• Planning
• Investigation
• Implementation
• Hand-off

Budget 1
Budget 2
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The RCx Process
Lesson If you want quality, you need to specify
it There is no standard approach

• Four Phases
• Planning
• Investigation
• Implementation
• Hand-off

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Planning Phase Elements
Lessons Dont short the planning process Hire
the right skill set.

• Select the in-house team
• Define the scope, objectives and deliverables
  (work products)
• Hire the CX provider
• Develop the RCX Plan based on the scope
• Hold a Kick-Off Meeting

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What should a RCx Plan include?

• General Building Information contact Info
• Project Objectives Brief Building Description
• Brief Systems Description (involved in RCx)
• Roles and Responsibilities of team members
• Lines of Communication and Work Protocols
• Schedule
• Testing and Diagnostic Plan Outlines
• Implementation of Recommendations
• List of Project Deliverables

Deliverable
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Kick-Off Meeting

• Purpose
• To impart the owners objective for the project
• To discuss and agree to the RCx Plan
• To clarify the key roles and responsibilities of
  commissioning team members
• To identify and agree to schedules
• To define the work protocols and policies
• Document the meeting

Deliverable
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Investigation Phase Elements

• Gather and develop building documentation
• Perform site assessment
• Perform analysis to determine which improvements
  provide the greatest benefit
• Develop a master list of findings
• Develop Recommendations
• Focus on long lasting operating improvements with
  short paybacks
• May include capital improvement opportunities
• May include training recommendations
• Select measures

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Investigation Assessment

• Verify building documentation
• Original design intent / current operating
  requirements
• Drawings
• Control sequences of operation
• Verify actual operation (and procedures)
• Interview owners staff and contractors
• Implement diagnostic testing and monitoring
• Fix-as-you go approach

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Diagnostic Testing and Monitoring

• Types
• EMCS Trend logging
• Portable Data Loggers
• Functional testing in conjunction with data and
  trend logging
• Manual testing

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Master Log of Findings and Recommendations

• This Log should include the following
• Item
• Equipment or System ID or Name
• Finding Description
• Recommended Improvement
• Estimated Savings (/Yr) or Benefit
• Estimated Cost to Implement
• Payback (Yrs)
• Recommended Implementation strategy (optional)

Deliverable
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Implementation Phase Elements

• Develop a detailed implementation plan, scopes of
  work, and budget
• Implement the selected cost-effective
  improvements (and capital measures)
• Verify and document results

Deliverable
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Hand-off Phase Elements

• Develop Persistence Strategies
• Energy tracking and re-benchmarking
• Re-commissioning plan
• Continuous re-commissioning activities (MV)
• Update PM program
• Redefine responsibilities
• Training
• Develop the Final RCx Report
• Hold a Project Close-Out Meeting
• Present Final RCx Report and Persistence Plan

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Final Report Elements

• Executive Summary
• Introduction Project objectives
• Methodology data collection / analysis
• Baseline and Facility Description Current
  Requirements
• Findings and Recommendation
• Implementation Results
• Persistence strategies
• Appendix Savings Calculations, trend logging
  figures, utility history analysis figures, RCx
  plan, photos, etc.

Deliverable
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Ensuring Persistence of Savings

• Good documentation
• Implemented measures, retrocommissioning
  findings, energy and demand savings estimates,
  and operations maintenance procedures
• Performance Monitoring
• Benchmarking, tracking monthly utility bills,
  using installed EMS, detected anomalies may be
  referred to the RCx provider
• Building Operator Training

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Some Case Studies
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Case Study

• Mark O Hatfield Federal Courthouse (HC)
  Portland, OR
• 560,000 Square Feet
• Built in 1997
• Occupancy 330 Full Time Employees
• Owner GSA

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GSAs Goal for RCx

• Comfort
• Temperature
• Proper ventilation
• Energy
• Meet LEED-EB Requirements for Green Building
  Certification by USGBC

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HC - Systems

• Four built-up AHU cooling ventilation
  (100,000 CFM)
• Two built-up AHU heating (100,000 CFM)
• Hot water plant five boilers (2 _at_ 865 MBH and 3
  _at_ 2800 MBH)
• Chilled water plant two 450 ton chillers and
  one 116 ton chiller
• Johnson Controls Inc. energy management control
  system

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Major Findings Summary

• Total Est. Savings 104,000

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Some Specific Findings

• Building Pressure Negative (envelope leaks)
• Hot Water Plant Control (over pumping)
• Courtroom Fan-Powered VAV Boxes
• Warm-up Mode Modifications (simultaneous heating
  and cooling)
• Over Ventilation (moving too much air)
• Return and Exhaust Air Recirculation (reduced
  economizing)
• Chilled Water / AHU Control (excessive cooling
  valve cycling loop tuning needed)

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Oregon High Tech Facility

• PGE RCx Program
• 800,000 ft2 Office space computer labs
• Buildings 2 to 19 years old
• Three measures implemented
• Annual Energy Savings 130,050 (9.3)
• Implementation Costs 124,200
• Simple Payback 0.8 years

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California Hospital

• SMUD RCx Demonstration Program
• 8-story, 300,000 ft2
• 68 findings identified during RCx process
• 19 low-cost measures implemented
• Annual Energy Savings 56,865 (6.7)
• Implementation Costs 29,600
• Simple Payback 0.5 years

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California Coroner Crime Laboratory
Lesson Small building can be cost effective

• SMUD RCx Demonstration Program
• 2-story, 94,000 ft2
• 27 findings were identified during RCx process
• Four measures implemented
• Annual Energy Savings 64,400 (14)
• Implementation Costs 4,300
• Simple Payback 0.07 years

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Major Resources

• Building Commissioning Association, www.bcxa.org
• California Commissioning Collaborative (CCC),
  www.cacx.org
• PECI www.peci.org
• Annual National Conference on Building
  Commissioning, www.peci.org/ncbc
• 2004 conference May 18-20, Atlanta, GA

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Questions?
Thank You