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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,

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

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  1. 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

  2. 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

  3. 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

  4. Metaphors for Commissioning… • Commissioning as an efficiency measure • Commissioning as an insurance policy • Commissioning as an immunization program

  5. 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.

  6. 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.

  7. 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

  8. Results from the Baseline School: Blattman Elementary • source: www.nisd.net

  9. From an uncommissioned school we expected: Chaos Upon First Occupancy Baseline School • source: www.nisd.net

  10. But it’s a very good school. Baseline School • source: www.nisd.net

  11. 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

  12. Summary of Metrics

  13. 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?

  14. 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.

  15. Thank you! Questions? • source: www.nisd.net

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