Energy Management in Operations and Maintenance

Transcription

1 Energy Management in Operations and Maintenance Summer 2017 Course Number: David Norvell Credit Designation: PE, LEED AP Assistant VP Sustainability Initiatives Matthew Wiechart PE, LEED AP Senior Mechanical Engineer / Principal TLC Engineering for Architecture

2 TLC Engineering for Architecture is a Registered Provider with The American Institute of Architects Continuing Education Systems. Credit earned on completion of this program will be reported to CES Records for AIA members. Certificates of Completion for non-aia members are available on request. This program is registered with the AIA/CES for continuing professional education. As such, it does not include the content that may be deemed or construed to be an approval or endorsement by the AIA of any material of construction or any method or manner of handling, using, distributing, or dealing in any material or product.

3 AIA Learning Objectives Overview of unique in-house institutional approach to Operations & Maintenance, as well as energy management Understand the techniques to present a solid case for energy management Realize the value of a defined workflow process and time-series data analytics in reducing energy consumption Understanding the role of Energy Modeling in respect to Operations & Maintenance optimization, start to finish

4 President Dr. Charles N. Millican President Dr. John C. Hitt

5 Degree Programs: 211 Total Degrees Awarded: 232,144 AY Credit Hours: 1,449,115.0 FTIC Applicants: 25,671 FTIC Acceptances: 10,604 Average SAT: 1250 (1840) Average HS GPA: 3.9

6 FY 2016 Research Funding: $146 M UCF regarded to have very high research activity -The Carnegie Foundation, 2011 Notable, recent research contributions to: optics, modeling and simulation, digital media, engineering and computer science, business administration, education, and hospitality management.

7 Main Campus: 1,415 acres Regional Campuses: 10 Main Campus Buildings: 180 Gross Square Footage: 10 M Housing Total: 10,276 beds Employees Total: 10,567 Operating Budget: $1.6 B

8 Stakeholders

9 Trends in Commercial Buildings Budgets Fixed or Shrinking Energy Costs are Rising Efficiency Standards Rising Buildings Becoming More Complex Workforce Insufficiently Educated Deferred Maintenance Growing

10 Building Loads to Manage Efficiency Conservation Automation Hotel Syndrome Policy Applications Plug Load Lighting HVAC

11 Teaching Academy Building

12 Time Series Trends

13 Engineering Building III

14 HEC Engineering Building

15 HEC Engineering Building Calibration Adjust Schedule Unify Setpoints Simultaneous Heating and Cooling Static Pressure Reset

16 Documented Workflow

17 Documented Workflow

18 RASI Table

19 Preventative Maintenance Completion Rate Percent Completed Percentage Goal

20 Preventative vs. Corrective Hours Hours January 2014 May 2014 September 2014 January 2015 May 2015 September 2015 January 2016 May 2016 September 2016 Preventive Corrective

21 Results

22 Building Loads to Manage Plug/Process HVAC Lighting

23 Early Energy Modeling Evaluate Energy Conservation Measures Optimized Lighting? Daylighting Controls? Reduce Plug Loads? Optimized HVAC? Shading? Demand Control Ventilation? Energy Recovery? Better Glass? Water Use Reduction? Optimized Building Envelope Material?

24 Energy Model Software Dynamic Modeling System needs to model 3-D System needs to set control parameters System needs to model daylighting controls System needs to be able to provide design data (should not just auto-size systems) Scheduling needs to reflect expected occupancy of the facility.

25 Need to Evaluate, Track and Conservation Measures

26 Measurement and Verification Incorporation of Measurement and Verification Based on IPMVP Volume III Should Outline Methods for Determining Energy Savings Follow a site/job specific plan. Specify the Variables and Assumptions Establish Quality Assurance Methods Specify the Reports to be Provided

27 Measurement and Verification Identify Goals and Objectives First State Clearly What You Want To Do Documented Energy Reduction Understand Equipment Operations Consider Predictive Maintenance Capabilities

28 Designs Need Measurement Identify Strategies and Techniques Then State How You Measure Success At It Incorporate Design Measures Trend and Track Conservation Measures

29 Complete Energy Model Final Energy Model Model need to have full scheduling profiles. System needs to have all setback and control strategies. Needs to be able to accurately account for sun shading Needs to accurately account for daylight harvesting

30 Energy Model Needs to be Representative

31 Post Occupancy Review of Building Monitor ECM to Trend Logs Monitor Total Building Loads Water Consumption Interior/Exterior Lighting Equipment Power HVAC Loads Other ECM s Evaluate Conditions that are +/- 10% of predicted values

32 Model Calibration Building Energy Models should be used in all phases of construction process from design to operation. However, for operational use, there is a need to address discrepancies between the design predicted performance and the actual performance. Building Model Calibration is the process of improving the accuracy of simulation models to reflect the As-Built conditions and actual operating conditions; Calibration performance is assessed using standard statistical indices: Predict

33 Data Points More Data Points The More Accurate the Prediction/ Calibration

34 Prediction / Optimization Prediction algorithms are required in order to determine future trends over short control timeframes based on historic data; Control Scenarios: Prediction profiles, in conjunction with detailed calibrated simulation models are used to derive building performance predications for a range of control scenarios; Optimization algorithms are used to determine the best course of action for a given set of objectives (e.g. minimize cost / CO 2 ) and constraints (ensure all zones within comfort threshold)

35 Manual Calibration Based on inputs from results visualization and sensitivity and performance analysis, the model calibration focuses on reviewing the following parameters: Electrical Metering and Weather Data; Occupancy Profiles; Any Adjacency Conditions; HVAC Equipment.

36 Predictable / Manageable Facility Coil Load Measured vs. Simulated Equipment Load Measured vs. Simulated

37 Relevancy

38 Conclusions Be forward-thinking! Possibility of significant cost benefits Don t forget about the people! Sophistication doesn't always mean efficient! Well defined and documented ground rules. Measure and Verify Against a Comprehensive Energy Model.

39 Presenters Contact Information David Norvell PE Asst VP Sustainability Initiatives (407) Matthew Wiechart PE Principal / Senior Mechanical Engineer matthew.wiechart@tlc-eng.com (407)

40 Thank you for your attention!