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Retrocommissioning Lessons from the Field
Eveline Killian, CEM
Cx Associates, LLC
AIA Quality Assurance
The Building Commissioning Association is a Registered Provider
with The American Institute of Archi...
3
At the end of this session participants will be
able to:
See the benefits of:
• Retrocommissioning small commercial buil...
4
Presentation Overview
Example Projects
Lessons Learned
5
Howard Opera House
6
Problem Statement
• Constant speed pumps
• Manual diverter valve
• Failing controls
• Open ductwork to MEP
7
RCx Solutions
• VSDs on cooling tower
and main pumps
• Removal of diverter
valve
• Boiler circulating pump
• Central Pla...
8
Realized Savings
-
5,000
10,000
15,000
20,000
25,000
30,000
35,000
40,000
Apr-13
May-13
Jun-13
Jul-13
Aug-13
Sep-13
Oct-...
9
Fletcher Free Library
10
Controls Upgrade Savings
Average annual utility bill savings of 18%.
11
Operational Performance Support
Services Contract
• Monitor HVAC system operation & utility bills
• Maintenance program...
12
Performance Monitoring Successes
• Chiller compressor failure Early
cooling tower failure warning.
• HVAC-1 economizer...
13
Typical RCx Measures
• VSDs on pumps
• Controls
• Setpoint changes
• Pipe insulation
• Economizer
• System harmonizing
14
Stumbling Blocks
• Scope increases during
project
• Narrow our attention…
and then… refer to first
bullet
• Contractor ...
15
What Went Right
The people!
• Quality
contractors
• Flexible team
• Collaborative
team
• Good
communication
16
Lessons Learned
17
Lesson #1: Gauge the Owner
Determine:
• their version of the problem
• their openness to new
efficiency ideas
• if ther...
18
Lesson #2: Good Contractors
Create a team you can trust and then listen to their
ideas throughout the project
19
Lesson #3: Stay Flexible
If it’s an old building,
things WILL come up
unexpectedly – stay
flexible and creative, and
co...
20
Lesson #4: Choose Measures Wisely
• Present at least two tiers in the
proposal:
• Tier 1: conservative approach
that ad...
21
Lesson #5: Choose Owners Wisely
If you can, pick owners
that:
• care about their
building, not just their
bottom line
•...
22
Why It’s Worth Doing
• Commercial Buildings consume nearly 20% of
all energy used in the United States.
• We spend more...
Company Name
Website
Email Address
Eveline Killian, CEM
Senior Engineer
www. cx-associates.com
eveline@cx-assoc.com
802-86...
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Retrocommissioning Lessons From the Field by Eveline Killian

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Retrocommissioning has multi-faceted benefits – operating, maintenance and replacement cost reductions – but its value is still hard to market to building owners and energy utilities. This presentation details a number of successful retrocommissioning projects in Vermont with proven energy and maintenance savings. It also details an innovative consulting contract Cx Associates has structured to maintain the energy savings realized through retrocommissioning, as well as help control maintenance costs and identify further opportunities. Building owners and efficiency utilities are convinced by the facts of real savings – come listen to some examples!

Success stories include a 70,000 square foot, 100-year old, 4-story brick building with office and retail spaces with a improvements made to its central heat pump system; a 42,000 square foot public library with BMS control upgrades, and a 2-story office building with a central hydronic heating system and rooftop unit cooling systems. Improvements range from simple maintenance items to VFD retrofits to BMS installations.

We will detail the audit and analysis we performed to gain commitment from both the building owner and the energy utility, the design process, the actual construction trials and tribulations, and methods of proving the savings outcome. The projects have been in operation for a minimum of nine months and we will discuss their ongoing performance. Real-life examples of the system and human issues we encountered in these older buildings, and the collaboration it took to overcome them, will be described.

In addition, we have entered an “Operational Performance” contract with one of our retrocommissioned buildings. This contract oversees the preventative maintenance program to ascertain its effectiveness, provides technical support for maintenance issues, monitors energy saving retention, ensures efficient operation of the HVAC systems, and identifies further opportunities. In this presentation we will discuss the process, successes and challenges of such an innovative program.

Published in: Engineering, Technology, Business
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Transcript of "Retrocommissioning Lessons From the Field by Eveline Killian"

  1. 1. Retrocommissioning Lessons from the Field Eveline Killian, CEM Cx Associates, LLC
  2. 2. AIA Quality Assurance The Building Commissioning Association is a Registered Provider with The American Institute of Architects Continuing Education Systems (AIA/CES). Credit(s) earned on completion of this program will be reported to AIA/CES for AIA members. Certificates of the Completion for both AIA members and non-AIA members are available upon request. This program is registered with AIA/CES for continuing professional education. As such, it does not include 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. Questions related to specific materials, methods, and services will be addressed at the conclusion of this presentation. 2
  3. 3. 3 At the end of this session participants will be able to: See the benefits of: • Retrocommissioning small commercial buildings • Developing a collaborative team • Staying flexible with expectations • Choosing the measures carefully And…be forewarned of some stumbling blocks Learning Objectives
  4. 4. 4 Presentation Overview Example Projects Lessons Learned
  5. 5. 5 Howard Opera House
  6. 6. 6 Problem Statement • Constant speed pumps • Manual diverter valve • Failing controls • Open ductwork to MEP
  7. 7. 7 RCx Solutions • VSDs on cooling tower and main pumps • Removal of diverter valve • Boiler circulating pump • Central Plant controls • Controlled OA dampers
  8. 8. 8 Realized Savings - 5,000 10,000 15,000 20,000 25,000 30,000 35,000 40,000 Apr-13 May-13 Jun-13 Jul-13 Aug-13 Sep-13 Oct-13 Nov-13 Dec-13 Jan-14 Feb-14 Mar-14 kWh Pre- and Post-Installation Monthly kWh Pre kWh Post kWh
  9. 9. 9 Fletcher Free Library
  10. 10. 10 Controls Upgrade Savings Average annual utility bill savings of 18%.
  11. 11. 11 Operational Performance Support Services Contract • Monitor HVAC system operation & utility bills • Maintenance program definition & oversight • Assessment of unplanned maintenance items • Further energy savings identification • Long-term capital planning for HVAC system costs
  12. 12. 12 Performance Monitoring Successes • Chiller compressor failure Early cooling tower failure warning. • HVAC-1 economizer/fan speed control. • Exhaust fan failure discoveries. • Resolution of draft issues at circulation desk. • Freezestat failure discoveries.
  13. 13. 13 Typical RCx Measures • VSDs on pumps • Controls • Setpoint changes • Pipe insulation • Economizer • System harmonizing
  14. 14. 14 Stumbling Blocks • Scope increases during project • Narrow our attention… and then… refer to first bullet • Contractor schedule pushed out • Plans were incomplete, took long to piece together
  15. 15. 15 What Went Right The people! • Quality contractors • Flexible team • Collaborative team • Good communication
  16. 16. 16 Lessons Learned
  17. 17. 17 Lesson #1: Gauge the Owner Determine: • their version of the problem • their openness to new efficiency ideas • if there are others who could influence the project and involve them early Hear and address their concerns immediately
  18. 18. 18 Lesson #2: Good Contractors Create a team you can trust and then listen to their ideas throughout the project
  19. 19. 19 Lesson #3: Stay Flexible If it’s an old building, things WILL come up unexpectedly – stay flexible and creative, and convey this mindset to the owner. However Don’t necessarily promote this attitude to the contractors – you’ll be bombarded with suggestions and change orders!
  20. 20. 20 Lesson #4: Choose Measures Wisely • Present at least two tiers in the proposal: • Tier 1: conservative approach that addresses their concerns • Tier 2: deeper cost-effective opportunities • Tier 3: long term opportunities • Don’t push – they’ll balk • Don’t try to do it all – they’ll balk
  21. 21. 21 Lesson #5: Choose Owners Wisely If you can, pick owners that: • care about their building, not just their bottom line • have the support they need to make it happen • will potentially lead to more projects
  22. 22. 22 Why It’s Worth Doing • Commercial Buildings consume nearly 20% of all energy used in the United States. • We spend more than $200 billion each year to power our country's commercial buildings. • “A typical commercial building could save 20% on its energy bills simply by commissioning existing systems so they operate as intended.” Source: U.S. DOE - http://www4.eere.energy.gov/alliance/node/9
  23. 23. Company Name Website Email Address Eveline Killian, CEM Senior Engineer www. cx-associates.com eveline@cx-assoc.com 802-861-2715 ext. 15
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