Commissioning of new schools a state funded study of the costs and benefits
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Commissioning of New Schools: A State Funded Study of the Costs and Benefits. Kristin Heinemeier, Ph.D., P.E. Technical Director Brooks Energy & Sustainability Lab with Balaji Santhanakrishnan, Anita Ledbetter, Michael Martin, Dean Schneider, Jim Shoop, Wes Harvey,

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Commissioning of New Schools: A State Funded Study of the Costs and Benefits

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Commissioning of new schools a state funded study of the costs and benefits

Commissioning of New Schools: A State Funded Study of the Costs and Benefits

Kristin Heinemeier, Ph.D., P.E.

Technical Director

Brooks Energy & Sustainability Lab

with Balaji Santhanakrishnan, Anita Ledbetter,

Michael Martin, Dean Schneider,

Jim Shoop, Wes Harvey,

Joseph Martin, Frank Thomas

ACEEE Summer Study

August 25, 2004


Benefits of commissioning

Benefits of Commissioning

  • Reduce Operating Costs

    • ENERGY

    • O&M

  • Better Building

    • Thermal comfort

    • Indoor air quality

  • Better Process for Providing Building

    • On time

    • Within budget


Why study the benefits

Why study the benefits?

  • There is an urgent need for solid (non-anecdotal) data on the benefits of commissioning.

    • to support the business case

    • to ensure accountability

  • This is much more difficult than other types of M&V

    • what “would have happened?”

    • retrofit measures

    • new construction measures

    • commissioning is probabilistic


Metaphors for commissioning

Metaphors for Commissioning…

  • Commissioning as an efficiency measure

  • Commissioning as an insurance policy

  • Commissioning as an immunization program


Engineer s depiction of the public health decision making process

Engineer’s depiction of the public health decision-making process

  • Epidemiological study of the prevalence of the disease, and the costs of the disease in different populations.

  • Controlled lab tests of possible interventions

  • Controlled clinical trials to understand the efficacy, side effects and best way to administer.

  • Provide intervention in a big way.

  • Multi-center study to evaluate efficacy.


Engineer s depiction of the public health decision making process1

Commissioning Research Needs

Engineer’s depiction of the public health decision-making process

What is the state of the art of conventional construction processes? What is the prevalence of building deficiencies, by building or system type, and what is their cost?

  • Epidemiological study of the prevalence of the disease, and the costs of the disease in different populations.

  • Controlled lab tests of possible interventions

  • Controlled clinical trials to understand the efficacy, side effects and best way to administer.

  • Provide intervention in a big way.

  • Multi-center study to evaluate efficacy.

Develop and optimize the Commissioning Process.

Detailed and controlled side-by-side study of commissioning in a limited number of buildings to identify nature of the benefits and to develop metrics.

Not-So-Controlled Side-by-Side Exploratory Study,

to Identify Nature of Benefits and Develop Metrics

Conduct commissioning in a large number of buildings.

Collect large datasets of performance of commissioned and uncommissioned buildings.


Data collection methods

Data Collection Methods

  • Interviews

    • School District Staff (engineering, construction, energy management, O&M)

    • Architect, ME, GC, Subcontractors

  • Construction Documents

    • Building Plans and Specs, Change Orders, Requests for Information, Meeting Minutes

  • Work Order Data

  • Utility Data, Interval Energy Data

  • Occupant Surveys and Interviews

  • Building Walkthru, Observations


Results from the baseline school blattman elementary

Results from the Baseline School: Blattman Elementary

  • source: www.nisd.net


Baseline school

From an

uncommissioned

school we expected:

Chaos Upon

First

Occupancy

Baseline School

  • source: www.nisd.net


Baseline school1

But it’s a very

good school.

Baseline School

  • source: www.nisd.net


Definition of metrics

Definition of Metrics

  • Numeric

  • Easily Collected using Simple Data Collection Methods

  • Clearly Defined, Unambiguous

  • Normalized for Different Size Schools (sqft or construction costs) and Other Factors

  • Capture Benefits from Commissioning


Summary of metrics

Summary of Metrics


Future work needed

Future Work Needed

  • How reliable are the metrics?

    • How much natural variation is there?

  • What is the best normalization?

  • What is the appropriate scope (eg, MEP)?

  • How well do they really capture performance?

  • How much effort does it take to collect them? Who can collect them?

  • How much are they affected by judgement required?


Commissioning research needs

Commissioning Research Needs

Commissioning Research Needs

What is the state of the art of conventional construction processes? What is the prevalence of building deficiencies, and what is their cost?

Develop and optimize the Commissioning Process.

Detailed and controlled side-by-side study of commissioning in a limited number of buildings to develop metrics and to identify nature of the benefits.

Conduct commissioning in a large number of buildings.

Collect large datasets of performance of commissioned and uncommissioned buildings.


Thank you questions

Thank you!Questions?

  • source: www.nisd.net


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