Energy Efficient Operations Presentation to ASHRAE Energy Expo October 2, 2013 Center for Energy and Environment
Energy Efficient Operations Presentation to ASHRAE Energy Expo October 2, 2013 Center for Energy and Environment.
Dec 17, 2015
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Transcript
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 expertiseWhat to check is often less important than how
to check it.Remove barriers related to intermittent
activitiesUtilize 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 Schedules1. Start at the main screen and click on “Logs” in the upper left corner.
5. You can click and drag again to zoom further and get an even smaller timeframe.
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
Description Average Savings Number Observed
Boiler retrofit 8.1 kbtu/sq. ft. 3
Heat recovery retrofit 3.9 kbtu/sq. ft. 5
Stuck or leaky valve 3.9 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 feetAverage 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
Page 16
Page 17
Verification Check sheet
Check mark under Section 41.2 if delta T is greater than 10 degrees: No corrective action is needed.
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