Energy Efficient Operations Presentation to ASHRAE Energy Expo October 2, 2013 Center for Energy and Environment

Page 2  During commissioning projects the commissioning agent develops a deep understanding of the facility Mechanical systems Building envelope Lighting Occupant patterns  Those systems that work right don’t generate recommendations  Energy efficient operations is a part of all systems But, much of the knowledge is not transferred to anyone by the commissioning agent A Valuable Addition to the Building Commissioning Process

Page 3  Assumes Existing Building Commissioning (EBCx)  Transfer of knowledge is needed  Adds value to the customer  Demonstrates expertise of the commissioning agent  Leads to high performing buildings  Peter Herzog has been the driving force in this field for over 40 years For Existing Buildings

Page 4  Understand the building structure and systems (EBCx)  Analyze the operations (EBCx)  Train the staff  Document the results in a manual  Continue the cycle Energy Efficient Operations: The Process

Page 5  80:20 rule Energy intensive operations Common types of deficiencies Needs of the operator  Based on observations during EBCx project Systems Staff Operations Individualized training

Page 6  Depends on operator’s level of expertise  What to check is often less important than how to check it.  Remove barriers related to intermittent activities  Utilize established training methods Repeat three times Break down into simple steps Clearly state the objective Training Module Example: Checking performance with the BAS

Page 7 Using the BAS to Review Schedules Goal: On at 7AM, off at 10 PM

Page 8  Based on interviews and documents in new buildings Owners, occupants and operators  Existing buildings (when occupied) should define OFR  Building must be operating at equilibrium Agreement between owners, operators and occupants Does not mean it is energy efficient  Occupant complaints or unstable conditions indicate non-equilibrium conditions May be due to equipment or design issues Typically a focus of EBCx project Owner’s Facility Requirements

Page 9  Energy efficient operations will be identified in the equilibrium operations through rigorous investigation  Non-equilibrium operations will be investigated and solutions identified  Commissioning agent’s scope covers both  Energy Efficient Operations Manual is the tangible record of these findings, even after prescribed measures are implemented Value of integrating with EBCx

Page 10  Manual must be comprehensive Level of detail depends to some degree on the operator  Check sheets must be tailored to the operator How many things can they check, and how often? What level of detail is needed in the instructions? What is the logging system? What is done with the results?  Facility size may provide a rule of thumb Large 24x7 facility probably has a full staff with specialists Small 50 hr/week facility may have a part time staff, or it may be a secondary responsibility of someone else Operators will differ in competency

Page 11 State of Minnesota Buildings: Most common energy saving opportunities

Page 12 DescriptionAverage SavingsNumber Observed Boiler retrofit8.1 kbtu/sq. ft.3 Heat recovery retrofit3.9 kbtu/sq. ft.5 Stuck or leaky valve3.9 kbtu/sq. ft.14 Time of day enabling is excessive 3.3 kbtu/sq. ft.135 Measures with the largest impact These observations are based on 218 buildings at 49 sites containing 18.5 million square feet Average EUI (site energy use) of these buildings is 107 kbtu/sq. ft.

Page 13 Why Customize? Heating Systems

Page 14  Program developed for building operators to assure persistence of savings following SB2030 new construction and PBEEEP projects  Site specific  Half day of hands on training  Manual and Check Sheets provided  Series of monthly webinars on general energy efficient operations management topics AHU’s Economizers, Fans, Motors, VFD’s Building automation systems Heating and cooling plants Summary: Energy Efficient Operations

Page 15  Requires a relationship  Provide requested Job Instruction sheets  Reminder to submit check sheets (or in PM system) Maintained in a database  Provide long term support Mechanical engineering expertise Controls issues General energy management Sharing of new developments and best practices Energy Efficient Operations: After the Visit

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Page 17 Verification Check sheet Check mark under Section 41.2 if delta T is greater than 10 degrees: No corrective action is needed.

Page 18 Chris Plum Center for Energy and Environment Thank you