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TRANSCRIPT
2018 Wisconsin Energy Efficiency Expo
In my absence, please read all of the notes in the instructor notes
section below each slide.
Six-Step HVAC Maintenance Recovery
Tom Olson
© 2016 Tom Olson, All rights reserved
Brief Biography
• Degree in Aeronautical Engineering
• Worked for two international temperature control contractors back when the energy crisis first introduced itself
• Member of the MN Chapter of ASHRAE Energy committee, when they were charged with reviewing and commenting on ASHRAE 90-75, which eventually became the first ever nationwide energy code
• Past-president of the MN Chapter of ASHRAE
• Co-owner of a successful HVAC and temperature control contracting business for 28 years
• HVAC Energy Optimization Instructor
• Author
The Economy of Energy Conservation in Educational Facilities
1973
Energy waste springs from two basic sources:
Lethargy & Ignorance
In 1975, ASHRAE* developed ASHRAE Standard 90-75, now
ASHRAE 90.1, which eventually became America’s first ever energy
code:
Systems that employ simultaneous cooling and heating are inherently
inefficient in their utilization of energy. Their use is discouraged.
*ASHRAE - American Society of Heating, Refrigerating and Air-conditioning Engineers
In 1975, ASHRAE* developed ASHRAE Standard 90-75, now
ASHRAE 90.1, which eventually became America’s first ever energy
code:
Systems that employ simultaneous (mechanical) cooling and heating are
inherently inefficient in their utilization of energy. Their use is discouraged.*
*ASHRAE - American Society of Heating, Refrigerating and Air-conditioning Engineers
A FAILING GRADEThat was the headline of the
April, 1992 editorial in the magazine, Engineered Systems.
A recent survey by the International Facility Managers Association, IFMA, had listed the top 4 commercial office complaints.
?????
1992 International Facility Managers Association (IFMA)
performed a study on complaints
1. I’m too hot!
1992 International Facility Managers Association (IFMA)
performed a study on complaints
1. I’m too hot!
2. I’m too cold!
1992 International Facility Managers Association (IFMA)
performed a study on complaints
1. I’m too hot!2. I’m too cold!3. Not enough filing
space
1992 International Facility Managers Association (IFMA)
performed a study on complaints
1. I’m too hot!
2. I’m too cold!
3. Not enough filing space
4. Poor indoor air quality
BOMABuilding Owners and Managers
Association International
In 2007, BOMA challenged their
membership to reduce energy consumption
30% by 2012.
ASHRAEAmerican Society of Heating, Refrigerating
and Air-conditioning Engineers
Later in 2007, ASHRAE similarly challenged their
membership to a 30%reduction in energy
consumption by 2012
The U.S. Environmental Protection Agency
Despite the 2007 pleas by BOMA and ASHRAE, in 2017, the EPA estimates that the energy saving potential for an existing
commercial facility is still 30%!
Something is wrong!
In 1978, I developed a simple, back-to-basics plan that
really works!
Six-Step HVAC Maintenance Recovery
Six-Step Plan for Maintenance Recovery
1. Fix what’s broken
Pneumatic Control System Maintenance
Assuring a clean, dry, oil-free source of airis the #1 priority in “Fix what’s broken”
Six-Step Plan for Maintenance Recovery
1. Fix what’s broken
2. Clean what’s dirty
75% of all HVAC Maintenance
Keep the equipment clean, dry
and lubricated
It’s not Rocket Science!
Six-Step Plan for Maintenance Recovery
1. Fix what’s broken
2. Clean what’s dirty
3. Change operations made possible by steps 1 & 2
Six-Step Plan for Maintenance Recovery
1. Fix what’s broken
2. Clean what’s dirty
3. Change operations made possible by steps 1 & 2
4. Revise temperature control sequences to eliminate ALLsimultaneous cooling and heating
Constant 60F MA temp
Proper elimination of simultaneous cooling & heating
• Return Air Temp Mixed Air Temp Setpoint* A/C Discharge
Temp Setpoint
• 60°F 70°F 75°F
• 74°F 70°F 75°F
• 77°F 60°F 70°F
• 80°F 55°F 60°F
* Subject to maintaining CO2 levels less than 1,200 ppm
CASE STUDY• 128,000 square foot high school• 30+ year-old steam boilers, with much of the
steam converted to hot water heat• 05/06 heating consumption – 7.3 Btu/sf/hdd• Work performed included: boiler tune-ups;
replacement of defective steam traps; bird-screen and coil cleaning; and elimination of simultaneous cooling and heating
• 06/07 consumption – 4.6 Btu/sf/hdd (-37%)• Total investment ~ $20,000• First year savings ~ $28,500• First year CO2 reduction ~ 304,000 #
Six-Step Plan for Maintenance Recovery
1. Fix what’s broken2. Clean what’s dirty3. Change operations made possible by
steps 1 & 24. Temperature control revisions to
eliminate simultaneous cooling and heating
5. Installation of new technology hardware
Six-Step Plan for Maintenance Recovery
1. Fix what’s broken
2. Clean what’s dirty
3. Change operations made possible by steps 1 & 2
4. Temperature control revisions to eliminate simultaneous cooling and heating
5. Installation of new technology hardware
6. Preventive maintenance
PREVENTIVE MAINTENANCE
• 75% of all HVAC maintenance has to do with keeping systems clean, dry and lubricated
• No one can provide those services more cost-effectively than well-trained, properly motivated, in-house personnel
