University of NebraskaLincoln

1

• University of NebraskaLincoln
• 2006 Big 12 Facilities Conference
• UNL Energy Management Control System
• Jim Hines, Director
• Building Systems Maintenance
• April 10, 2006

2
Presentation Overview

• Introductions
• About BSM
• Outside the Box Thinking
• Our EMCS History
• UNL Late Night TOP TEN
• Outside the Box Room Controller
• Competitive Bidding w/ the Big Boys
• Laboratory Fume Hood Control
• Why is rollin yer own Less Expensive?
• Employees VS. Contract Labor?
• Projects w/ Five Year Payback
• A Look Under the Hood

3
Introductions

• UNL Chancellor, Harvey Perlman
• Business Finance, Vice Chancellor Christine
  Jackson
• Facilities Mgmt Planning, Asst Vice Chan Ted
  Weidner
• Associate to Asst VC, John Marker
• Utility Services (NuCorp)
• Director, Clark DeVries
• Landscape Services
• Director, Eileen Bergt
• Facilities Planning Construction
• Director, Howard Parker (Campus Architect)
• Custodial Services
• Director, Ken Walvoord
• Business Office
• Director, Cindy Bell
• Building Systems Maintenance
• Director, Jim Hines

4
Introductions

• Building Systems Maintenance, Director, Jim Hines
• Assistant Director, Jim Jackson, Operations
  Maintenance
• Manager, Rick Nelson, EMCS Office Operations
• Manager, Ron Peters, Construction Projects
• Manager, Greg Turner, Mechanical
• Asst. Manager, Jeff Lamp, Electrical Systems
• Engineer, Warren Lauritzen, HVAC Controls
  Applications
• Engineer, Alan Eberspacher, Card Access
  Applications
• Assistant Director, Stefan Newbold, RD
• Engineer, Lalit Agarwal, Control System Software
• Engineer, Draper Palu, Control System Hardware
• Engineer, Matt Stamm, Control System Hardware
• Engineer, Kirk Conger, Energy Conservation
  Projects

5
About BSM FY 05Building Systems Maintenance

• 4,286,000 State Maintenance
• 6,850,000 Funded GSF
• 1,103,000 Service to Auxiliaries
• 3,000,000 Auxiliary GSF
• 1,960,000 Controls Capital Const
• Hvac Fume Hood Controls
• Fire Alarms
• Card Access

6
About BSMConventional Trades Shops Services

• Electrical
• Fire Alarm
• Painting
• Plumbing
• Carpentry
• Keys Locks
• Card Access
• HVAC Mechanical
• Electronics Lab

• Machine Shop
• Welding
• Roofing
• Masonry
• HVAC Controls
• Refrigeration
• Sheet Metal
• Materials Inventory
• Flooring

7
About BSMUnconventional Services

• Energy Conservation Project RD
• Designing
• Estimating
• Evaluating
• Controls RD Group
• Design, Prototyping, Integration
• Controls Hardware Manufacturing
• Electronics Lab
• Controls, Card Access and Fire Alarm
• Engineering (design)
• Installation (rough in)
• Commissioning (termination and calibration)
• Testing Balancing
• Operation
• Maintenance
• Fume Hood Bio Safety Cab Certification

8
Outside the Box Thinking

• UNLs Energy Management Control System
• Mechanical System Controls
• Room Temperature Controls (NanoStat)
• Fume Hood Controls
• Laboratory Pressurization Controls
• Green House Temperature Controls
• Door Card Access (in development)
• Building Utility Metering

9
Mechanical System Controls
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Outside the Box Thinking Mounted Inside the Box
Big Red Phone
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Home Grown Controls
12
Home Grown Control Software
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UNL EMCS History

• 1970s Johnson Controls T6000
• 1978 Visit to UCSD (Cal San Diego)
• 1979 EMS I (No BOT)
• 1980s UNLs First Hardware
• 1990s UNL Enters Software Arena
• 1996 UNLs 1st MicroProcessor tstat
• 2000 Y2K Compliant System
• 2003-05 Linux/Java/TCPIP
• Today 85 Buildings 1000s NanoStats

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Top 10 Reasons For Us To Build Our Own Building
Automation System

• 10 Non-Proprietary
• 9 Flexibility
• 8 Standardization
• 7 Proven Success and Innovation
• 6 Masters of Our Domain
• 5 Utilitarian
• 4 Extensibility
• 3 Full Documentation
• 2 Made in Nebraska

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The Number 1 Reason For Us to Build Our Own
Building Automation System

• Lower Cost

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Outside the Box Room Controller
The NanoStat
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UNLs NanoStat Room Controller

• Vendor
• Yes
• Yes
• Yes

Feature Temperature Control Night Setback? User
Override?
UNL Yes Yes Yes
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UNLs NanoStat Room Controller
90
140
126
90
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UNLs NanoStat Room Controller

• Vendor
• Yes
• Yes
• Yes
• Option
• Option

Feature Temperature Control Night Setback? User
Override? Occupancy Setback? Lighting Control?
UNL Yes Yes Yes Yes Yes
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UNLs NanoStat Room Controller
140
90
62
50
126
90
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UNLs NanoStat Room Controller

• Vendor
• Yes
• Yes
• Yes
• Option
• Option
• No

Feature Temperature Control Night Setback? User
Override? Occupancy Setback? Lighting
Control? Card Access?
UNL Yes Yes Yes Yes Yes Yes
22
Card Access
352
23
UNLs NanoStat Room Controller
90
140
62
50
126
352
X X
90
24
UNLs NanoStat Room Controller
90
140
62
50
126
352
90
25
UNLs NanoStat Room Controller

• Vendor
• Yes
• Yes
• Yes
• Option
• Option
• No
• No
• No
• No
• Ladder

Feature Temperature Control Night Setback? User
Override? Occupancy Setback? Lighting
Control? Card Access? Remotely
Upgradeable? Programmable? DCL Lab Fume Hood
Control? Serviceability?
UNL Yes Yes Yes Yes Yes Yes Yes Yes Yes Floor
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Lower Cost? How Do We Know For Sure?

• Competitively Bid
• Materials
• Mechanical System Controls
• Room Controls
• Labor
• Rough In, Termination, Commissioning
• Bids Solicited and Received from
• Control Logic
• Minneapolis Honeywell
• Andover Controls
• Johnson Controls
• UNL Controls Estimator (in the blind)

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2005 Competitive Bid
One Air Handler 27 I/O Points and 5 Chill Water
I/O Points
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2005 Competitive Bid
One Heat Exchanger 18 I/O Points
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2005 Competitive Bid
300 Rooms with VAV / Reheat HW Perimeter
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2005 Competitive Bid
Quotations Received
Control Logic Minneapolis Honeywell Andover
Controls Johnson Controls UNL Controls Systems
459,878 516,514 428,992 582,317
299,017
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Lower Cost? How Do We Know For Sure?

• Fume Hood Controls Project
• Hamilton Hall Chemistry Renovation Fall 2002
• 245 Fume Hoods w/ Room Pressure Control
• Supply Air Valve 2000 CFM Maximum
• General Exhaust Valve 1600 CFM Maximum
• Fume Hood Valve 1000 CFM Maximum
• Bidders
• Phoenix Celeris
• TekAir Smart Lab
• UNL Control Systems

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Fume Hood Controls Projects
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Lower Cost! HOW?

• Smaller Inventory of Repair Parts
• No Scheduled Obsolescence (Mature Product ?)
• Common Equipment in all Buildings
• Lower Training Costs (Fewer Complex Systems)
• Upgradeable Firmware and Software
• Not For Profit (No Margin For Investors)
• Parts, Not Assemblies Purchased Competitively
• Avoid Multiple Mark Ups (General Mechanical
  Controls Supplier ?)
• Lower Labor Costs (Wage Benefits, No Profit)

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Why Pay a Corporate Profit for Labor?
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How Have We Used This Technology?

• Beadle Center Labs VAV Fume Hoods
• Burnett Hall CV to VAV
• College of Business CV to VAV
• Hardin Center Labs VAV Fume Hoods
• Home Economics CV to VAV
• Love Library CV to VAV
• Oldfather Hall CV to VAV
• Othmer Chem Eng Labs VAV Fume Hoods
• Vet Diagnostic Center CV to VAV
• 13 Others Since 1990

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Oldfather Hall
110,350 sq.ft. classrooms offices used days
evenings 2 CVDD HVAC systems 419 mixing
boxes 217,500 Btu/sq.ft./yr 258,123 /yr utility
costs 2.29 /sq.ft./yr
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Oldfather Hall
Constant-Volume Dual-Duct HVAC System Typical
Construction 1960s Office Building
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System Overview
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meanwhile, down in the basement
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Typical HVAC ModificationsTo UNL Classroom
Buildings

• Separate Control of Mixing Dampers
• Install Electronic Thermostats
• Install Variable Speed Drives on Fans
• Author Optimization Control Software

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Constant-Volume Dual-Duct Mixing Box Structure
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Constant-Volume Dual-Duct Mixing Box Operation
20 HOT 120 cfm
MIXED 600 cfm 64 F, 1SP 5184 Btu/hr
64 F 4SP
80 COLD 480 cfm
Mixing Dampers
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Constant-Volume Dual-Duct Mixing Box Example
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Constant-Volume Dual-Duct Mixing Box Operation
max-
Air Mixing (most of the time)
Air Supplied to Room
Hot Air
Cold Air
Full Heating ? to ?
Full Cooling
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Constant-Volume Dual-Duct Mixing Box Modification
Cold Air Damper
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Variable-Air-Volume (VAV) Dual-Duct Box Operation
Hot Air Damper
to Room
Hot Duct
Cold-Only 282 cfm 55 F, 1SP 5184 Btu/hr
Cold Duct
47 COLD 282 cfm 55 F, 2SP
Cold Air Damper
47
VAV Dual-Duct Box Modified Operation
max-
Energy Savings from Variable Air Volume
? Air Supplied to Room ?
Cold Air
Hot Air
min-
Full Heating ? to ?
Full Cooling
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VAV Dual-Duct Box Deadband Mode
Hot Air Damper
to Room
No ventilation air during unoccupied periods.
Hot or cold air is used only to maintain room
temperature within a broad range.
Hot Duct
Cold Duct
Cold Air Damper
touching thermostat returns box to normal
operating mode
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VAV Dual-Duct Box Deadband Mode
max-
Energy Savings from Variable Air Volume
? Air Supplied to Room ?
Hot Air
Cold Air
Energy Savings from Deadband
none-
Heating ? no heating or cooling
? Cooling
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Oldfather Hall
Prior Energy Cost 258,123
Lights Power
31,903
Fans
18,781
164,456
42,983
Heating
Cooling
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Prior Energy Cost 258,123
Oldfather Hall
Actual Savings 102,279
Electricity
6,154
18,353
77,772
Steam
Chilled Water
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Oldfather Hall
102,279 531,358 5.2 years 18.6 707,871
Annual Savings Project Cost Simple
Payback Rate of Return Net Present Value
(1,2)
(3)
(3,4)

• Notes
• based on 2006 energy prices (no escalation)
• Normalized for weather variations
• based on 20-year economic life
• based on 5 discount rate

53
A Look Under the Hood
Stefan Newbold, BSME, MSCS, P.E. Several Years
as Head of Mechanical Engineering TCEP Earned
MSCS at UNL after joining BSM in 2002 BSM
Assistant Director of Research Development
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University of NebraskaLincoln