Retro-commissioning is an energy efficiency process that optimizes the performance of existing buildings. It identifies operational and maintenance issues and implements upgrades to reduce costs and maximize equipment life. The retro-commissioning process involves four phases - planning, investigation, implementation, and turn over. It establishes a commissioning team to review documentation, assess facility performance, and prioritize improvements. Studies show retro-commissioning typically costs $0.30 per square foot with an average payback period of 13 months in reduced energy and operating expenses.
2. Presentation Overview
History of Commissioning
Types of Commissioning
Retro-Commissioning Benefits
The Retro-Commissioning Process
Maintaining Retro-Commissioning Benefits
Questions / Contact Info
4. History of Commissioning
1970s
1980s
1990s
2000s
1982 ASHRAE develops formal guidelines for
commissioning
1984 University of Wisconsin (Madison) rolls-out
commissioning courses
1989 ASHRAE publishes HVAC Commissioning
Guideline
5. History of Commissioning
1980s
1970s
1990s
1980s
1994 Presidential Executive Order 12902 requires
1996 ASHRAE publishes Guideline 1-1996
Process
2000s
1990s
2000s
commissioning for federal agencies
The HVAC Commissioning
6. History of Commissioning
1980s
1970s
1990s
1980s
2004
USGBC requires Retro-Commissioning to
certify a LEED®-EBOM building
2005
ASHRAE publishes Guideline 0-2005
The Commissioning Process
2008
BCA issues Retro-Commissioning Best Practices
2009
NEBB publishes Retro-Commissioning Standard
ASHRAE administered the first Commissioning
certification exam CPMP
2000s
1990s
2000s
7. Types of Commissioning
Commissioning
(New Building)
Quality Assurance Process that ensures the
planning, construction & maintenance is performed
according to the Owner’s Project Requirements
Re-Commissioning
(Previously Commissioned Building)
Retro-Commissioning
(1st Time for Existing Building)
8. Retro-Commissioning Benefits
Owner
Reduces Operating costs
Reduces Operations & Maintenance costs
Reduces liability risk of sick building syndrome
Resolves deficiencies that occurred during construction
Maximizes life of equipment
Increases occupant productivity
Enhances property values
9. Retro-Commissioning Benefits
O&M Staff
Maintain properly operating equipment & systems
Utilize properly operating control system
Reduces equipment/component failure
Provides a benchmark for future systems evaluation
Improved building documentation
Reduction of occupant complaints
11. Candidates for
Retro-Commissioning
Poor equipment and control systems integration
Energy Star Rating below 70
High energy use
High building infiltration
Excessive equipment failure
Frequent occupant complaints
System performance does not comply with OPR
13. Phase 1: Planning
Identify known deficiencies
Develop OPR
Collect building documentation
Develop Retro-Commissioning Plan
Assemble Commissioning Team
14. The Retro-Commissioning Team
Owner’s Point
of Contact
Design
Professionals
O&M Staff
Commissioning
Authority
Testing &
Balancing
Contractor
Control
Contractor
Utility Provider
MEP Contractors
15. Phase 2: Investigation
Review facility documentation
Energy usage
Drawings
Sequence of operation
Test & Balance reports
O&M manuals
16. Phase 2: Investigation
Conduct facility assessment
Equipment
Ductwork, piping and other components
Energy Management System
21. Retro-Commissioning Costs
The Lawrence Berkeley National Laboratory, a
U.S. Department of Energy lab, is partnering
with the Portland Energy Conservation Inc.
22. Retro-Commissioning Costs
How can you reduce energy and operating costs?
Lawrence Berkeley National Laboratory 2004 study
Average cost $0.30/sq ft
13-month payback
23. Questions
Jasmine Engineering
San Antonio Office
115 E Travis, Suite 1020
San Antonio, TX 78212
(210) 227-3000
Austin Office
100 Congress, Suite 2000
Austin, TX 78701
(512) 326-2900
www.jasmineengineering.com
Notas do Editor
Welcome and Introduction
Intro to History slide:
The interest in commissioning began as early as 1977 in Canada. The U.S. began introducing Cx several years later, and versions continued in this country in the 1980s and 1990s. However, it wasn’t until 2004 that Cx became formalized.
Intro to History slide:
The interest in commissioning began as early as 1977 in Canada. The U.S. began introducing Cx several years later, and versions continued in this country in the 1980s and 1990s. However, it wasn’t until 2004 that Cx became formalized.
Commissioning of a new building ensures that the design, construction, and performance of a NEW BUILDING is according to the owner’s design intent
RE: Resolving problems (design and construction, system degradation over time: “Depending on the age of the building….”
Owner’s Rep and Commissioning Agent may or may not be one and the same person
Manufacturer’s Reps, such as System Specialists, Maintenance Contractors
Testing Professionals, such as the TAB (Testing & Balancing), etc.
Objective of Phase 2: Identify, prioritize and select R-Cx improvements
Re: Prioritize and select improvements – Consider operational improvements related to health & safety AND cost vs. payback.
Matrix – Detailed list of equipment
JASMINE ENGINEERING LESSON LEARNED: Be sure to budget for those quick and easy repairs.
Re: Prioritize and select improvements – Consider operational improvements related to health & safety AND cost vs. payback.
Matrix – Detailed list of equipment
JASMINE ENGINEERING LESSON LEARNED: Be sure to budget for those quick and easy repairs.
Implementation Plan is the strategy. Implementation Report details the steps.
JASMINE ENGINEERING LESSON LEARNED:
Phase 4 Objective: Effective turnover of facility to owner
RE: Develop building documentation archive: Include equipment lists & control system documentation (points list, sequences of operation, system one-line diagrams)
RE: Track Performance: Benchmark with EPA Portfolio Manager Online, etc., Utility Bill Analysis, and Trend Analysis
CA is evaluating 160 facilities that have been retro-commissioned. They are anticipating an average cost of $0.50/sq ft and a pay-back period of 3 months to 25 months
Re: “R-Cx is the most cost-effective strategy for reducing energy and costs in buildings today” – also reduces greenhouse gas emissions.
Cx data included for interest.
Energy savings extend three to five years. Data beyond that time frame are not available.