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Building Operator Certification®
HESNI Annual Conference Aramark, Downers Grove, IL
May 2, 2013
Today’s Agenda
• Learn about BOC – What is BOC? – Future training series
• Economizers: Free Cooling – Presented by Michael Kuk
• LEED AP BD+C, CPMP, OPMP, BEAP, CxA • CERx Solutions
MEEA is a nonprofit organization bridging the gap between energy efficiency policy development and program implementation
Midwest Energy Efficiency Alliance
organization bridging the
development and program
Midwest Energy Efficiency Alliance
development and program
Midwest Energy Efficiency Alliance
MEEA Flagship Program: Building Operator Certification®
• Offered in 9 states through license from NEEC
• 3,200 certified graduates since 2003 – Out of 11,000 nationwide
• 50+ partnerships – Utilities, state & local
governments, academic institutions
What is BOC?
• Professional development program for building engineering & maintenance staff
• Energy efficient operations and maintenance • Level I and Level II certifications
– Technical training – In-class examinations – In-facility projects – Eligibility requirements – Annual continuing education & renewal Annual continuing education & renewal
Level I Certification BOC 1001 – Energy Efficient Operation of Building HVAC Systems (2 days) BOC 1002 – Measuring & Benchmarking Energy Performance BOC 1003 – Efficient Lighting Fundamentals BOC 1004 – HVAC Controls Fundamentals BOC 1005 – Indoor Environmental Quality BOC 1006 – Common Opportunities for Low-Cost Operational Improvement One Supplemental Course
74 hours of training 5 facility-based projects
700 pages of reference books
Level I Projects • Facility floor plan • Energy benchmarking • HVAC controls
operational review • Lighting survey • Electrical distribution
plan
Level II Certification BOC 201 - Preventive Maintenance & Troubleshooting BOC 202 - Advanced Electrical Diagnostics (Project)
BOC 203 - HVAC Troubleshooting & Maintenance (2 days) (Project)
BOC 204 - HVAC Controls & Optimization (Project)
Two Supplemental Courses: Water Efficiency, Motors, Demand Reduction, Building Commissioning
61 hours of training 3 facility-based projects
600 pages of reference books
BOC: Value for the Money � � � � � �� � � � �
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Benefits for Building Operators
Supports job retention & advancement – 90% of graduates believe BOC improves job
performance – Over 50% of graduates report increases both
in job responsibilities & compensation Enhances job marketability
– Over 75% of interviewed employers view BOC positively when reviewing resumes
Benefits for Businesses
Achieve energy savings without capital investment – Immediate payback on BOC investment
Recruit & retain qualified building staff Increase building occupant comfort Prolong building equipment life
BOC-trained Operators Achieve Energy Savings
*Uses Midwest weighted average retail commercial energy prices Evaluations conducted by Navigant Consulting View full reports at www.boccentral.org
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Illinois BOC Veterans Pilot
• IL DCEO State Energy Office, MEEA, & state and local veteran and workforce agencies – 2012 Commitment to Clinton Global Initiative
• Recruit qualified unemployed vets • Enhance skills & job marketability through
BOC certification and mentoring • Place into building O&M jobs
Pilot Progress • Springfield BOC Aug – Nov 2012
– 16 veterans recruited, 4 enrolled 3 earned certification, 2 seeking employment
– 3 mentors • DuPage County BOC Feb – May 2012
– 9 veterans recruited, 4 enrolled 3 earned certification, 2 seeking employment
– 3 mentors • Ongoing employer outreach
Featured BOC Certified Veterans • Michael Wright, U.S. Army Veteran
– Past HVAC/R Technician for All Seasons Mechanical, Springfield, IL
– Completed HVAC/R Universal Technician Program at Richland Community College, IL
– Holds BOC Level I
• Hector Ayala, U.S. Marine Corps Veteran – Past Maintenance Supervisor/Operations Manager,
U.S. Marine Corps (domestic & intl locations) – B.S. Management/CIS, Park University, MO – Applying BOC Level I
Upcoming Series • Level I
• Chicago - September 2013 • Peoria – September 2013 • Carbondale – October 2013
• Level II • Chicago – September 2013 • Springfield – September 2013
• DCEO and Utility Rebates
Wanted: BOC Instructors • 3+ years experience
instructing working professionals in O&M or related field
• 2+ years employment in field or industry related to training topic(s)
• Bachelor's degree (or equivalent)
• 2+ references
Contact Information Eric Roach
Sr. Program Associate Midwest Energy Efficiency Alliance
312-784-7277 [email protected]
www.mwalliance.org ♦ www.boccentral.org
© 2012 19
BOC Tech Talk
Economizers – Free Cooling
© 2012
Small Packaged HVAC Equipment
Packaged Rooftop Units (RTU) Gas Packs Heat Pumps All Electric Air Conditioning Units
Sized in tons of cooling capacity and btuh of heating capacity.
They condition a large fraction of all commercial building spaces.
Mostly constant volume - also includes VAV and VVT
© 2012
Market Characterization
34% of commercial buildings have packaged HVAC units
150,000 – 175,000 units in the field (522M sf of space)
New sales of approx. 7,000-9,000 units
Approximately 800 contractors in light commercial HVAC
Data for Pacific Northwest region Published in Light Commercial HVAC Market Assessment - Report No. 05-561-02B Northwest Energy Efficiency Alliance, 2005
© 2012 22
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How are RTUs rated?
Seasonal Energy Efficiency Ratio (SEER) The higher the SEER rating of an RTU, the
more energy efficient it is. The SEER rating is the Btu of cooling output during a typical cooling-season divided by the total electric energy input in watt-hours (W·h) during the same period.
SEER = BTU ÷ W·h
Minimum federal requirement = 13 SEER
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Packaged Rooftop Equipment
Source: York International Corp.
© 2012
Minimum Outside Air Position
Maximum Outside Air Position
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Building Cooling with Outdoor Air
Outdoor air conditions are often optimal to provide building cooling as: Full OSA cooling Pre-cooling benefit for mixed air
OSA Damper Operation Heating Mode
Damper set to minimum position First Stage of Cooling with Economizer
Damper set to full open position Second Stage of Cooling without Economizer
Damper set to minimum position Minimum Damper Position – 10-20% OSA Maximum Damper Position – 70% OSA or
greater
© 2012
ASHRAE 90.1-2010 requirement
• Economizer required >54,000 BTUh
• Must Have integrated economizer (simultaneous economizer and compressor operation)
• Zone 4A • Dry-bulb economizer
not allowed
29
4A
5A
© 2012
ASHRAE 90.1 Economizer High Limits
Economizer Device Type
Limit Note
Fixed Dry Bulb OAT > 70F Not allowed CZ 5A (So. Illinois)
Differential Dry Bulb OAT > RAT Not allowed CZ 5A Fixed Enthalpy OAH > 28 BTU / # Electronic Enthalpy (OAT, OA rh) > A OAT RH exceeds the
“A” setpoint curve Differential Enthalpy OAH > RAH Outdoor air enthalpy
exceeds return air enthalpy
Dew-point and dry-bulb temperatures
Dew point OA >55F OAT > 75F
OAT exceeds 75F or outside dewpoint exceeds 55F
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Study found…
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Savings from Integrated Econ.
32
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Routine Maintenance
Typical service contract Filter change Check basic heating/cooling operation Belt condition/tightness Electrical connections Coil check or cleaning often extra $$
In house maintenance may be similar
© 2012
Maintenance Hall of Shame
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Common Issues
Comfort driven (too cold/hot)
Duct design (or lack thereof)
Fan cycling Refrigerant charge Compressor failure Actuator motor/damper
failure
© 2012
Operational Performance
The “O” part of O&M Most service agreements and in-house maintenance
practices don’t focus on operational performance
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Operating History
Source: New Buildings Institute - PIER
© 2012
Economizer Maintenance
An assessment of overall economizer operation and energy efficiency optimization adjustments
© 2012
© 2012 40
© 2012
Improving Energy Performance
Operating modes Economizer Sensor accuracy Air flows Refrigerant
charge
© 2012
RTU Economizer Evaluation
Thermostat review Heating and cooling setpoints Occupied/Unoccupied schedules Is thermostat wired for two stages of cooling? Can morning warm-up be enabled?
Economizer review OSA, RA and MA temperature sensors type,
location and condition Is the OSA sensor a Honeywell C7650? Control logic setting and condition of controller Damper assembly condition – Damper, linkage,
seal and motor
© 2012
RTU Economizer Evaluation
Airflow testing Minimum and maximum OSA settings and
flow Evaporator and condenser coils review
Surface condition of coil Coil delta T (indicator of refrigerant charge)
Data logger test
© 2012 44
Supply Air Temperature [SAT] (1). Mixed Air Temperature [MAT] (2Return Air Temperature [RAT] (3). Outside Air Temperature [OAT] (4).
© 2012
Economizer Function
• Controller issues • Sensors • Differential control – Single point changeover
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Thermostat Issues
© 2012
Thermostat Issues
Room temperature setpoint Occupied mode set to minimal deadband Unoccupied mode setpoints not expanded to
broader temperature range than in occupied mode.
Thermostats only have a single stage call for cooling versus two stage Stage 1 – Adjust OSA damper to full open position Stage 2 – Activate Compressor
Does not have sufficient wiring or adjustability to enable morning warm-up
© 2012
Resources
Building Operator Certification www.TheBOC.info
Contact Information Michael Kuk, LEED AP BD+C, CPMP, OPMP,
BEAP, CxA
CERx Solutions Commissioning, Energy Efficiency, Retro
Commissioning Solutions 630-636-7118
630-631-9483 (mobile) [email protected]
BOC Participants by Sector
BOC Accreditation & Partnerships