Common Commissioning Problems Melek YALCINTAS, Ph.D., P.E., CxA, - - PowerPoint PPT Presentation

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Common Commissioning Problems Melek YALCINTAS, Ph.D., P.E., CxA, - - PowerPoint PPT Presentation

Dec 25, 2023 399 likes •708 views

Common Commissioning Problems Melek YALCINTAS, Ph.D., P.E., CxA, LEED-AP AMEL Technologies, Inc. Manoa Innovation Center 2800 Woodlawn Drive, Suite 251 Honolulu, HI 96822 Phone: 988-0200 E-mail: melek@ameltech.com SAME, Honolulu HI

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SAME, Honolulu HI November 12, 2013 Melek YALCINTAS, Ph.D., P.E., CxA, LEED-AP AMEL Technologies, Inc. Manoa Innovation Center 2800 Woodlawn Drive, Suite 251 Honolulu, HI 96822 Phone: 988-0200 E-mail: melek@ameltech.com

Common Commissioning Problems

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SAME, Honolulu HI November 12, 2013

LEED Certified Buildings – where Commissioning is a mandatory requirement Claim:

  • Saves Energy
  • Better Indoor Air Quality
  • Protects Environment
  • Conserves Resources
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SAME, Honolulu HI November 12, 2013

LEED Certified Buildings - Energy

The Claimed benefits of LEED Certified facilities are being questioned: Recent peer reviewed research papers: “Do LEED-certified buildings save energy? Yes, but …” (Newsham, et al., 2009) http://archive.nrc-cnrc.gc.ca/obj/irc/doc/pubs/nrcc51142.pdf “Do LEED-certified buildings save energy? Not really…” Schofield (2009) http://www.sciencedirect.com/science/article/pii/S037877880900187X Then, USGBC States (2013) Once again, GSA recognizes that LEED works http://www.usgbc.org/articles/once-again-gsa-recognizes-leed-works

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LEED Certified Buildings - Energy

Energy Consumption Evaluation of U.S. Navy LEED-Certified Buildings (Menassa et al., 2012): 9 of 11 LEED buildings did not achieve a 30% savings in electricity consumption, while seven of eleven met water consumption savings requirements http://ascelibrary.org/doi/abs/10.1061/(ASCE)CF.1943-5509.0000218 Post-Occupancy Energy Consumption Survey of Arizona’s LEED New Construction Population (Oates and Sullivan, 2012)

http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29CO.1943-7862.0000478?journalCode=jcemd4&

The LEED NC sample also underperformed both the design and baseline energy use simulations

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SAME, Honolulu HI November 12, 2013

LEED Certified Buildings - IAQ

Indoor Air Quality- Occupant Satisfaction in LEED and non-LEED Certified Buildings (Altomonte and Schiavon, 2013) http://escholarship.org/uc/item/4j61p7k5

  • 144 buildings (65 LEED certified) and 21,477 individual occupant response

(10,129 LEED Buildings)

  • Not a significant influence of LEED certification on occupant satisfaction with

indoor environment quality

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SAME, Honolulu HI November 12, 2013 What is the true story? Why LEED certified buildings save energy or cannot save energy?

  • Design team has to demonstrate/prove the facility is energy efficient

What Makes a LEED Certified Building to Save Energy and Provide Better Indoor Air Quality?

COMMISSIONING

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SAME, Honolulu HI November 12, 2013

What is New-Construction Commissioning?

A systematic quality assurance process of verifying that building systems are designed, installed, tested, and they are capable of being operated, and maintained to perform as intended, or as the owner expects.

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What does Owner Expect from Commissioning Authority?

CxA conducts a series of tests to see how the building will work under normal operating conditions. These tests will detect any faults and problems before the

  • wner takes possession and occupies the building.
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Commissioning Benefits

Benefits to Owner:

  • Improved Indoor Air Quality (IAQ) and Occupant Comfort
  • Documented Maintenance Requirements
  • Improved Staff Training
  • Increased Life of Equipment
  • Reduced Operating Costs
  • Fewer Comfort Problems

Benefits to Contractor:

  • Reduced Warranty Issues
  • Reduced Contractor Callbacks
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Commissioning Process

  • Review Owner’s Project Requirements
  • Coordinate Basis of Design Document
  • Commissioning Specifications
  • Commissioning Plan
  • Design review
  • Review submittals
  • Construction observation
  • Pre-functional checks
  • Functional testing
  • Cx Issue resolution
  • Training
  • Review O&M manuals
  • Systems manual
  • Re-Commissioning
  • Commissioning Report
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SAME, Honolulu HI November 12, 2013

Commissioning Team

Owner’s Team:

  • Construction Engineer
  • Project Manager
  • Facility Manager
  • Maintenance Team

Contractor’s Team:

  • Project Manager
  • Quality Control Manager
  • Subcontractors: HVAC, Plumbing, Electrical, Controls Test & Balance

Design Team:

  • Architect, Mechanical Designer, Electrical Designer

Commissioning Authority:

  • Certified by ACG (AABC Commissioning Group), ASHRAE, BCA

(Building Commissioning Association), NEBB (National Environmental Balancing Bureau)

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  • Related to Design
  • Related to Installation
  • Related to Owner
  • Related to Contractor
  • Related to Commissioner

Commissioning Problems

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Commissioning Problems Related to Design

  • Sequence of Operation does not

Integrate Energy Savings Operations

  • Important IAQ Details for Building

Pressurization Missing

  • Demand Control Ventilation at Minimum

VFD Position does not Perform

  • Sufficient Maintenance Clearance not

Provided

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Commissioning Problems Related to Design

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SAME, Honolulu HI November 12, 2013

Commissioning Problems Related to Design

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Commissioning Problems Related to Installation

  • Duct Leakage
  • Weather Proofing
  • Corrosive Couplings, Bolts & Nuts
  • Un-insulated/Incomplete Duct Work
  • Modulating Dampers/Actuators not Installed

Correctly, & therefore not Responding to Control Commands

  • Condensation because of Improper Installation
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SAME, Honolulu HI November 12, 2013 Duct Leakage

Commissioning Problems Related to Installation

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SAME, Honolulu HI November 12, 2013 Weather Proofing

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Commissioning Problems Related to Installation

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Commissioning Problems Related to Installation

Corrosive Couplings, Bolts & Nuts

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Commissioning Problems Related to Installation

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  • Condensation because of Improper Installation

Commissioning Problems Related to Installation

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Commissioning Problems Related to Installation

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Commissioning Problems Related to Owner

  • OWNER needs to take part in commissioning activities
  • OWNER needs to respond to comments in Cx issue

resolution log

  • OWNER needs to actively monitor the building

performance after turnover

  • OWNER’s input and support is strongly needed

especially when CxA makes recommendations that will effect building energy performance, but not necessarily included in the original construction documents

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SAME, Honolulu HI November 12, 2013

Commissioning Problems Related to Contractor

  • Contractor needs to understand that they benefit most from

commissioning: reduced warranty issues, reduced contractor call- backs.

  • Contractor needs to understand Cx comments are not to show

contractors mistakes but to coordinate successful completion and turn

  • ver of the building.
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Commissioning Problems Related to Commissioner

  • Less involvement during design phase
  • HVAC and building system sequences are nor verified

during commissioning

  • Functional Tests are developed for individual equipment

but not whole systems

  • Sensor calibration not verified
  • Building schedule is not coordinated
  • Rigorous of commissioning testing is brief, not detailed

enough

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Commissioning can Delay Equipment Failure

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“Do LEED-certified buildings save energy? Yes, but …”

http://archive.nrc-cnrc.gc.ca/obj/irc/doc/pubs/nrcc51142.pdf

“Do LEED-certified buildings save energy? Not really…”

http://www.sciencedirect.com/science/article/pii/S037877880900 187X

You Decide/Answer:

Energy Savings Potential is Still Real

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Conclusions

RECOMMENDATIONS

  • Commissioning Authority should be hired by Owner, independent of

design team and contractor

  • Measurement and verification must be mandatory
  • Measurement and verification must be conducted continuously
  • LEED Certification is not a guarantee for energy saving and better

indoor air quality

  • Commissioning is the key for saving energy and better indoor air

quality, provided that Commissioning Comments are taken into consideration during Design and Construction.

  • Commissioning can extend the life of the building and equipment;

resulting less maintenance time.

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SAME, Honolulu HI November 12, 2013 Melek YALCINTAS, Ph.D., P.E., CxA, LEED-AP AMEL Technologies, Inc. Manoa Innovation Center 2800 Woodlawn Drive, Suite 251 Honolulu, HI 96822 Phone: 988-0200 E-mail: melek@ameltech.com

Thank You