© trane 2008 confidential eugene smithart, p.e. director, systems and solutions trane commercial...
TRANSCRIPT
© Trane 2008 Confidential
Eugene Smithart, P.E.Director, Systems and SolutionsTrane Commercial Sales
Chiller Killer II2 © Trane 2008Confidential
Agenda
• Highlights from EarthWise System Seminars
• A More Detailed/Advanced Look at Three Key Topics:
1. Series Chillers and VPF
2. Ice Storage
3. LAT and Controls
• Real World Examples of EachThe Goal?The Goal?
Chiller Killer II3 © Trane 2008Confidential
EarthWise™ Systems
EmissionsEmissions
EnergyEnergyEfficiencyEfficiency
ProductsProducts
Service/Parts/Service/Parts/SolutionsSolutions
ControlsControls
Chiller Killer II4 © Trane 2008Confidential
Low Flow, Low Temperature, High Efficiency Systems
+/-$+/-$air handlers
+/-$+/-$
+/-$+/-$controls
chillers+/-$+/-$piping
~/–$~/–$
ductwork
~/–$~/–$
Chiller Killer II5 © Trane 2008Confidential
How?
Temperature differential
Supply temperature Flow rates Fans
Ductwork
Pumps
Piping
Lessons Learned?
Chiller Killer II6 © Trane 2008Confidential
Chilled Water/VAV Systems
% o
f H
VA
C e
ner
gy
con
sum
pti
on
Trane EarthWise™ System
83%93%70%83%89%80%
AtlantaMinneapolisLos AngelesDenverPhiladelphiaPortland
100%100%100%100%100%100%
Conventional System
100
95
90
85
80
75
70
65
60
LEEDLEED®®
TRACETRACE
Chiller Killer II7 © Trane 2008Confidential
chilled water plant design...
Old “rules of thumb”
• 44°F chilled water supply
• 10°F delta T across the evaporator - that’s at 2.4 GPM/ton
• 10°F delta T across the condenser - that’s at 3.0 GPM/ton
Chiller Killer II8 © Trane 2008Confidential
chilled water plant design...
New “rules of thumb”
• 41°F chilled water supply
• 16°F delta T across the evaporator - that’s at 1.5 GPM/ton
• 15°F delta T across the condenser - that’s at 2.0 GPM/ton
• Potentially downsized the cooling tower
Chiller Killer II9 © Trane 2008Confidential
How do you know?
Chiller Killer II10 © Trane 2008Confidential
Key Lessons Learned …
• Cooling towers• Cooling coils• Pumps• Chillers• Air handlers• Controls
Chiller Killer II11 © Trane 2008Confidential
lessons learned
Cooling Tower Performance
“!Tower water should be hot!”
Towers fans should use VFDs! 2nd
1st
Chiller Killer II12 © Trane 2008Confidential
“Chilled water should be cold!”
lessons learned:
Cooling Coil Performance
Because of the pump energy savings
3rd
4th VFD on the CondenserWater Pump
Chiller Killer II13 © Trane 2008Confidential
Pump Pressure Optimization
Chiller Killer II14 © Trane 2008Confidential
Yes the chillers consume more energy
Factory witness testing
lessons learned
LLH Chiller Performance
“Chillers need to be efficient!”
but more than offset by the ancillaries
Chiller Killer II15 © Trane 2008Confidential
How can I eliminate the chiller’s kW increase for making colder water?
Chiller Killer II16 © Trane 2008Confidential
Ideal for use with variable primary flow:
series chillers
How can I eliminate the chiller’s kW increase for making colder water?
© Trane 2008 Confidential
Chiller Killer II Seminar
Lee Cline, P.E.Senior Principal Systems EngineerTrane Commercial Systems
Chiller Killer II18 © Trane 2008Confidential
Series Chillers & VPF
What?
• Variable chilled water flow through the whole system
Chiller Killer II19 © Trane 2008Confidential
Series Chillers & VPF
Benefits
Variable Primary Flow
• Reduces pumping costs
• Reduces first cost
• Adapts to system flow and temperature changes
• Advantages Trane chillers
• Advantages Trane controls
Series Chillers
• Increases system efficiency
• Expands system range
• Eliminate Flow Transients
• Reduces pumping costs
• Advantage Trane controls
Chiller Killer II20 © Trane 2008Confidential
Series Chillers & VPF
Objections
• It looks risky!
• We’ve never done it.
• How do you control it?
• Is it reliable?
Chiller Killer II21 © Trane 2008Confidential
Series Chillers
Thermodynamic staging = efficiency
Average kW/Ton = 0.576 kW/ton6% better efficiency
(10% better than 90.1)
$275k list price $272k list price
10”$200/ft
8”$175/ft
parallel chillers
44°F
44°F
54°F0.611 kW/ton
0.611 kW/ton
series chillers
48°F
40°F
56°F0.605 kW/ton
0.544 kW/ton
Chiller Killer II22 © Trane 2008Confidential
variable primary flow systems Three Key Application Requirements:
• Chillers must be able to accommodate a change of flow of at least 10% per minute; 30% or even 50% is even better – CTV & RTWD variable flow compensation
• Chillers need to be selected with adequate flow turndown– Strive for a turn down ratio of at least 2:1 of
design to minimum flow.
• Minimum and maximum flows must not be violated– A bypass is required
Chiller Killer II23 © Trane 2008Confidential
Minimum flow rates – PARALLEL chillers – base system
0
500
1000
1500
2000
2500
10 20 30 40 50 60 70 80 90 100
System Load
Flo
w
System Load
1 Chiller Loading
2 Chiller Loading
2 Chiller Unloading
Chlr 1 Capacity (tons) 500
Chlr 1 Design Flow (gpm) 1000
Chlr 1 Min Flow (gpm) 400
Chiller 1 Turndown 2.5 to 1
Chiller Killer II24 © Trane 2008Confidential
Minimum flow rates PARALLEL chillers – less turndown
0
500
1000
1500
2000
2500
10 20 30 40 50 60 70 80 90 100
System Load
Flo
w
2 Chiller Unloading
System Load
1 Chiller Loading
2 Chiller Loading
Chlr 1 Capacity (tons) 500
Chlr 1 Design Flow (gpm) 1000
Chlr 1 Min Flow (gpm) 700
Chiller 1 Turndown 1.4 to 1
Chiller Killer II25 © Trane 2008Confidential
Minimum flow rates
SERIES chillers – less turndown
0
500
1000
1500
2000
2500
10 20 30 40 50 60 70 80 90 100
System Load
Flo
w
2 Chiller Unloading
System Load
1 Chiller Loading
2 Chiller Loading
Chlr 1 Capacity (tons) 500
Chlr 1 Design Flow (gpm) 1000
Chlr 1 Min Flow (gpm) 700
Chiller 1 Turndown 2.8 to 1
Chiller Killer II26 © Trane 2008Confidential
Series ChillersExpand system operating range
Chiller Pass MinFlow
(gpm)
RTHD 250std-eff
23
293196
RTHD 250hi-eff
23
450300
RTAC 300std-eff
23
339226
RTAC 300 hi-eff
23
375250
RTWD 120 std-eff
23
10167
RTWD 120hi-eff
23
12382
Flow @ 2.0 gpm/ton
[12° dt]
(gpm)
Turndownratio
500 1.712.55
500 1.111.67
558 1.652.47
574 1.532.30
230 2.283.43
244 1.982.97
Flow @ 1.5 gpm/ton
[16° dt]
(gpm)
Turndownratio
375 1.281.91
375 0.831.25
418 1.231.85
430 1.151.72
172 1.702.56
183 1.492.23
Chiller Killer II27 © Trane 2008Confidential
Series Chillers & VPFWhat about pumping horsepower?
RTAA110 Parallel
Load PumpFlow
Sys PD HP
100 310 70.0 5.5
90 279 60.5 4.3
80 262 52.4 3.5
70 262 45.6 3.0
60 262 39.7 2.6
50 155 36.0 1.4
40 132 30.6 1.0
30 132 27.5 0.9
20 132 25.2 0.8
10 132 23.8 0.8
RTAA100 Series
PumpFlow
Sys PD w/ CV opt. HP w/opt
310 88.4 88.4 7.0
279 75.4 74.4 5.3
248 63.8 61.4 3.9
217 53.5 50.5 2.8
186 44.6 40.6 1.9
155 37.1 32.1 1.3
124 30.9 24.9 0.8
120 27.6 20.6 0.6
120 25.3 17.3 0.5
120 24.0 15.0 0.4
Chiller Killer II28 © Trane 2008Confidential
VPF SystemBy-pass flow control lessons
• Size bypass line for minimum flow
• Size bypass valve for minimum flow
• Select DP transducer or flow meter for minimum flow
• Select chiller proof-of-flow device for minimum flow
Chiller Killer II29 © Trane 2008Confidential
VPF Proof-of-Flow
• Orange Research Model 1516 DP switch http://www.orangeresearch.com
• W.E. Anderson H3 series DP switch from Dwyerhttp://www.dwyer-inst.com
• Thermal dispersion flow sensor - IFM Effector https://eshop2.ifm-electronic.com/EShop/IfmUS/MyAccountView.do
Chiller Killer II30 © Trane 2008Confidential
Proof-of-Flow IFM Effector
• IFM Effector– Phone: 800-441-8246 – Website: www.ifmefector.com – Purchase online at: https://eshop2.ifm-
electronic.com/EShop/IfmUS/MyAccountView.do
• Technical resource: – Chad Mosier– HVAC Industry Specialist – Phone: 610-524-4486
Chiller Killer II31 © Trane 2008Confidential
Where Else Use Series?
???
Chiller Killer II32 © Trane 2008Confidential
series chillers Ideal application for:
Free Cooling
Chiller Killer II33 © Trane 2008Confidential
series chillers
Ideal application for:
One AFD
Chiller Killer II34 © Trane 2008Confidential
series chillers
Ideal application for:
Heat Recovery
ASHRAE 90.1 Section 6.5.6.2 requires heat recovery for…
Chiller Killer II35 © Trane 2008Confidential
series chillers
Ideal application for:
Series Counter-Flow
Chiller Killer II36 © Trane 2008Confidential
series chillers & VPF
Trane Advantages
• Chiller minimum flows– Trane chillers use less tubes for a given efficiency– Our compressors ARE more efficient !
• System flow rate-of-change– Variable Flow Compensation gives Trane chillers the
most robust control in the industry
• We know how to do it
Chiller Killer II37 © Trane 2008Confidential
series chillers & VPF
What did we see?
• We know what the risks are
• We done it a lot
• It is easy to make reliable
• There are many benefits
• There are may applications
Chiller Killer II38 © Trane 2008Confidential
Airside: What’s different?
Lowers the required air flow by 30-40%
Supply airRoom setpoint Airside delta T
55°F
75°F20°F
Common
practice
Low airtemp.system
45 – 48°F77°F32°F
• Can cut the airside fan BHP by nearly 50%• Drives the need for high efficiency chillers• Locks in the low leaving water temperature
requirements for chillers
SA
tooccupiedspace
SA
tooccupiedspace
EarthWise™
airside systemfor floor-by-floor applications
MA
MA
RA
RA
OAOA
OA CA
CDQ
SA
tooccupiedspace
SA
tooccupiedspace
EarthWise™
airside systemfor floor-by-floor applications
EA
EA
MA
MA
RA
RA
EA
OAOA
EAOA CA
CDQ
Ventilation Reset• ASHRAE 62
Fan Optimization• ASHRAE 90.1
• Floor by Floor Pressurization
• Fan Optimization
© Trane 2008 Confidential
CDQ™
Chiller Killer II42 © Trane 2008Confidential
how it works
CDQ Desiccant Wheel
ability tohold water
vapor
high
relative humidity, %
low
0 60 1004020 80
Type III(CDQ)
Typically atmixed-air
conditions
Typically atleaving-coilconditions
Chiller Killer II43 © Trane 2008Confidential
Cool, Dry, Quiet (CDQ™)
OA
RA
SA
MAMA'
wate
r vap
or
50°F DB49°F DP
Trane CDQdesiccant wheel
CA
coolingcoil
55°F DB43°F DP
75°F DB63°F DP
80°F DB60°F DP
Chiller Killer II44 © Trane 2008Confidential
11030 40 50 60 70 80 10090dry-bulb temperature, °F
80
70
50
4030
wet-b
ulb
tem
pera
ture
, °F
60
CAreheat
180
160
140
120
100
80
60
40
20
hum
idity
ratio
, gra
ins/lb
of d
ry a
ir
RA
OA
SA
MA
MA'CA
OA 100°F DB74°F WB
RA 62°F DB50% RH
MA 80°F DB53.5°F DP
MA' 76°F DB58.5°F DP
CA 51°F DB49°F DP
SA 55°F DB42°F DP
CDQ requires:• less cooling tons• less reheat
Dryer
Wetter
WarmerCooler
CDQ
Chiller Killer II45 © Trane 2008Confidential
Cool, Dry, Quiet (CDQ™)
O
OA
SA
MA'
wate
r vap
or
CDQdesiccant wheel
CA
coolingcoil
100% RH
preheatcoil
RTWD
heat recovery chiller
MA
70%RH
38°–45° F
90°–140° F
Chiller Killer II47 © Trane 2008Confidential
10,000
Chiller Killer II48 © Trane 2008Confidential
9,000
Chiller Killer II49 © Trane 2008Confidential
0
Chiller Killer II50 © Trane 2008Confidential
Chiller Killer II51 © Trane 2008Confidential
Chiller Killer II52 © Trane 2008Confidential
Optimized Controls
Chiller Killer II53 © Trane 2008Confidential
The Four “Money” Control Strategies
• Fan Pressure Optimization
• Ventilation Reset
• Floor-by-Floor Building Pressurization
• Supply Air Reset
Chiller Killer II54 © Trane 2008Confidential
• Wireless Zone Sensors
• Auto-Commissioning
• Virtual Graphics
next generation VAV box control Three Capabilities That We Must Push Today!!
Chiller Killer II55 © Trane 2008Confidential
Auto-Commissioning
Prime Example of What We Can Do Via Intelligent Service
VAV Air System (Comm5)VAV Commissioning Report
Site: Antletam
76.666.5------32472.4 / 71.0NoVAV3-05
73.263.2------33973.3 / 73.9NoVAV3-04
73.663.6------36073.3 / 73.9NoVAV3-03
73.163.1------11673.7 / 73.0NoVAV3-02
76.266.2------27973.1 / 71.0NoVAV3-01
83.473.473.466.245170.6 / 71.0NoFP VAV3-06
81.771.771.664.739470.8 / 71.0NoFP VAV3-05
78.668.668.561.671874.6 / 73.9NoFP VAV3-04
82.272.272.162.138072.1 / 71.0NoFP VAV3-03
HWReheat
ReheatOff
Fan OnTemp
Fan OffTemp
Air Flow
Zone Temp /Zone Setpt
Alarm Present
82.372.272.263.851971.3 / 71.0NoFP VAV3-02
Chiller Killer II56 © Trane 2008Confidential
Virtual Graphics
Chiller Killer II57 © Trane 2008Confidential
Floor Plan
Chiller Killer II58 © Trane 2008Confidential
Chiller-Water VAV Systems
Chiller Killer II59 © Trane 2008Confidential
Chiller-Water VAV Systems
Chiller Killer II60 © Trane 2008Confidential
AdaptiView™Virtual Graphics on the Equipment
Trane Controls
What to talk about???
Chiller-Tower Optimization
Failure Recovery
Auto Rotation
VAS
AdaptiView
Area Control
3D Graphics
Auto Calibration
TOD Scheduling
Variable Flow
Flexible Alarming
Trend Logs
Graphical Trending
GraphICS
Soft Loading
LonTalk
ModbusAdaptive Control
Primary/Secondary
Constant Volume
Variable Primary FlowRapid Power Failure Recovery
Process Start
Operator Override Enabled
Critical Valve Reset
Ventilation Optimization
Fan Pressure Optimization
2D Graphics
Digital Page Alarms
E-Mail Alarms
Operator Manuals
Electronic Tutorials
Factory Training
MyTraneControls.Com
Demand Control Ventilation
TRAQ Dampers
Night Economizer
SAT Reset
StatiTrac
Heat Pump Control
ICE Mode
TR1 Drives
Industrial Options
Variable Flow CompensationBase Chiller
Peak Chiller
Swing Chiller
Setpoint Control
ASHRAE Std 147 Report
BacNET
Chilled Water Reset
Make Available
Make Unavailable
PPSPoints Lists
Failure Reset
V17 Demo
GeoThermal
Flow Based Subtract
Commissioning Reports
Chiller Killer II62 © Trane 2008Confidential
What to talk about??? Top 3 Control Sales Needs
1. Understand Trane systems’ full capabilities2. Get control of the control spec
3. Work together
“Our offering today is the “deepest” in HVACsystem insight and capability”
Mark Weldy
Chiller Killer II63 © Trane 2008Confidential
Top 3 Control Sales Needs
1. Know Trane full capabilities
Trane Resource Inventory Guide
Chiller Killer II64 © Trane 2008Confidential
Trane systems full capabilitiesTrane Resource Inventory Guide
• List of resources for:– Chilled Water– VAV System – Applied– Tracker Systems
• Info there includes– Description / Products– Value Classification– Competition– Case Studies– Presentations– Training– Seq of Op– Points Lists– Sales Tools
Chiller Killer II65 © Trane 2008Confidential
Top 3 Control Sales Needs
1. Understand Trane systems’ full capabilities
2. Get control of the control spec
Chiller Killer II66 © Trane 2008Confidential
Top 3 Control Sales Needs
2. Get control of the control spec
Guide Specifications and Sequences of Operation
Chiller Killer II68 © Trane 2008Confidential
Top 3 Control Sales Needs
2. Get control of the control spec
Pre-Packaged Solutions
Chiller Killer II70 © Trane 2008Confidential
2. Get control of the control spec
Pre-Packaged Solutions
• For New and Existing Building jobs
• Specification Information:– Sequences of operation materials – Generic input/output point lists – Sales sketches offered in Acrobat and AutoCAD formats – Generic product summaries– Sales Notes
• Technician Information:– Controller programming files – Tracer Summit custom workstation graphics – Commissioning sheets and application notes
Chiller Killer II71 © Trane 2008Confidential
2. Get control of the control spec
Pre-Packaged Solutions
VAV AHU WITH HYDRONIC HEATING/COOLING AND PREHEAT
AH0001
Chiller Killer II72 © Trane 2008Confidential
2. Get control of the control spec
Pre-Packaged Solutions
VAV AHU WITH HYDRONIC HEATING/COOLING AND PREHEAT
AH0001
Chiller Killer II73 © Trane 2008Confidential
2. Get control of the control spec
Pre-Packaged Solutions
VAV AHU WITH HYDRONIC HEATING/COOLING AND PREHEAT
AH0001
Chiller Killer II74 © Trane 2008Confidential
Top 3 Control Sales Needs
1. Understand Trane systems’ full capabilities
2. Get control of the control spec
3. Work together
Chiller Killer II75 © Trane 2008Confidential
Work Together!
Why?
Remember PPS for Existing Building and
Retrofit Work Too!
Remember PPS for Existing Building and
Retrofit Work Too!
Chiller Killer II76 © Trane 2008Confidential
Top 3 Control Sales Needs
3. Work Together
PPS Training
Trane Controls
Go talk about it!!!
Chiller-Tower Optimization
Failure Recovery
Auto Rotation
VAS
AdaptiView
Area Control
3D Graphics
Auto Calibration
TOD Scheduling
Variable Flow
Flexible Alarming
Trend Logs
Graphical Trending
GraphICS
Soft Loading
LonTalk
ModbusAdaptive Control
Primary/Secondary
Constant Volume
Variable Primary FlowRapid Power Failure Recovery
Process Start
Operator Override Enabled
Critical Valve Reset
Ventilation Optimization
Fan Pressure Optimization
2D Graphics
Digital Page Alarms
E-Mail Alarms
Operator Manuals
Electronic Tutorials
Factory Training
MyTraneControls.Com
Demand Control Ventilation
TRAQ Dampers
Night Economizer
SAT Reset
StatiTrac
Heat Pump Control
ICE Mode
TR1 Drives
Industrial Options
Variable Flow CompensationBase Chiller
Peak Chiller
Swing Chiller
Setpoint Control
ASHRAE Std 147 Report
BacNET
Chilled Water Reset
Make Available
Make Unavailable
PPSPoints Lists
Failure Reset
V17 Demo
GeoThermal
Flow Based Subtract
Commissioning Reports
© Trane 2008 Confidential
Miscellaneous Musings
Creative Applications
Chiller Killer II79 © Trane 2008Confidential
Miscellaneous Musings
• Fan Pressure Optimization/Critical Zone Reset
• Pump Pressure Optimization
• Low temperature air distribution
• The importance of LEED®
Chiller Killer II80 © Trane 2008Confidential
Fan Pressure Optimization /Critical Zone Reset
Chiller Killer II81 © Trane 2008Confidential
VAV System with DDC Controls
Communicating BAS
Fan Speed or Inlet Vane Position
Monitors temperature and cfm
Duct Pressure Sensor
Chiller Killer II82 © Trane 2008Confidential
VAV System with DDC Controls
Communicating BAS
Fan Speed or Inlet Vane Position
Duct Pressure Sensor
% Damper position
Chiller Killer II83 © Trane 2008Confidential
© American Standard Inc. 1996 © American Standard Inc. 1996
28
Pressure Optimization Control Logic
Chiller Killer II84 © Trane 2008Confidential
Normal Operation
Chiller Killer II85 © Trane 2008Confidential
Reduced Load
Chiller Killer II86 © Trane 2008Confidential
Here is an Excellent Third Party Reference
There is a great article on Critical Zone Reset of Fan Pressure in the June 2007 Issue of the “ASHRAE Journal”
Chiller Killer II87 © Trane 2008Confidential
Supply air fans on variable air volume (VAV) systems are typically controlled to maintain static pressure in the duct system at a given setpoint. Since 1999, ASHRAE Standard 90.1 has required that this setpoint be reset for systems with direct digital controls (DDC) at the zone level, specifically:
Setpoint Reset. For systems with direct digital control of individual zone boxes reporting to the central control panel, static pressure setpoint shall be reset based on the zone requiring the most pressure; i.e., the setpoint is reset lower until one zone damper is nearly wide open.
.
“Nevertheless, reset can generate fan energy
supply savings on the order of 30% to 50% compared to fixed
setpoints.”
By Steven T. Taylor, P.E., Fellow ASHRAEASHRAE Journal June 2007
Chiller Killer II88 © Trane 2008Confidential
Pump Pressure Optimization
Chiller Killer II89 © Trane 2008Confidential
Low Temperature Air Distribution
• Reduced First Cost
• Reduced operating Cost
• Increased Comfort
The Proverbial Holy Grail!!
Chiller Killer II90 © Trane 2008Confidential
Typical Objections
• What about condensation with low temp air?
• What about cold air “dumping” from diffusers?
• What about adequate air motion in room?
Chiller Killer II91 © Trane 2008Confidential
Linear Slot Diffuser vs. Typical
Chiller Killer II92 © Trane 2008Confidential
Parallel fan powered box
primary primary airair
supplysupplyairair
terminal terminal mixing fanmixing fan
plenumplenumairair
Chiller Killer II93 © Trane 2008Confidential
One Unexpected Benefit For Hot and Humid Climates
When low temp air systems are designed for 45-47 degree supply air, relative humidity in the space will typically be in the 35-40% range vs. a traditional system with 55 degree supply air providing relative humidity in the space of 55-60%
This can be a huge boost to comfort in the indoor climate in the summer and an improvement to employee productivity
Chiller Killer II94 © Trane 2008Confidential
SYSTEM SENS ZONE COIL AHU SA OA
LOSS SENS LATENT LOAD LAT LAT CFM CFM
Cafeteria 344,292 1,247,306 75,600 1322906 53.659 55 57746 14,400
Auditorium 292,863 664,050 114,870 778920 53.766 55 30743 16410
Band/ Choir 189,109 440,997 77,430 518427 53.606 55 20417 8017
Fine Arts Rooms 196,028 647,233 90,380 737613 53.648 55 29964 8858
Administration 147,622 410,089 66,229 419,686 53.571 55 18986 4302
Ist Flr Gym Classes 132,203 322,833 57,181 380014 53.704 55 14946 5552
Gymnasium 398798 1191266 359352 1550618 53.902 55 55151 33120
2nd Flr Gym Classes 292,610 1,014,475 373,597 1388072 53.761 55 46966 19,410
AREA E 362,369 926,737 109,943 1036680 53.635 55 42904 14139
West Ed Wing 324,801 819,437 97,008 916445 53.691 55 37937 11606
East Wing 320,153 900,273 148,146 1048419 53.691 55 41679 16886
Servery 0 75,090 41,208 116298 54.118 55 3476 2483
TOTAL 3000848 8,584,696 1569736 10097800 397440 152700
ZONE GAINS
Example of Low Temp Air Unit First Cost Savings-Chicago School
397440
Chiller Killer II95 © Trane 2008Confidential
SYSTEM SENS ZONE COIL AHU SA OA %OA
LOSS SENS LATENT LOAD LAT LAT CFM CFM
Cafeteria 344,292 1,247,306 75,600 1322906 45.122 47 41247 14,400 0.35
Auditorium 292,863 664,050 114,870 778920 45.272 47 21959 16410 0.75
Band/ Choir 189,109 440,997 77,430 518427 45.048 47 14583 8017 0.55
Fine Arts Rooms 196,028 647,233 90,380 737613 45.108 47 21403 8858 0.41
Administration 147,622 410,089 66,229 419,686 53.571 55 18986 4302 0.23
Ist Flr Gym Classes 132,203 322,833 57,181 380014 45.186 47 10676 5552 0.52
Gymnasium 398798 1191266 359352 1550618 45.463 47 39394 33120 0.84
2nd Flr Gym Classes 292,610 1,014,475 373,597 1388072 45.266 47 33547 19,410 0.58
AREA E 362,369 926,737 109,943 1036680 45.089 47 30646 14139 0.46
West Ed Wing 324,801 819,437 97,008 916445 45.167 47 27098 11606 0.43
East Wing 320,153 900,273 148,146 1048419 45.167 47 29771 16886 0.57
Servery 0 75,090 41,208 116298 54.118 55 3476 2483 0.71
TOTAL 3000848 8,584,696 1569736 10097800 289310 152700
ZONE GAINS
Example of Low Temp Air Unit First Cost Savings-Chicago School
289310
Chiller Killer II96 © Trane 2008Confidential
Example of Low Temp Air Unit First Cost Savings-Chicago School
• Reducing Air from 55 to 47 deg
– CFM decreased from 397,439 cfm to 289,309 cfm
– Actual Installed Cost for AHU Equipment was $2.90 per cfm.
– Cost Savings excluding sheet metal and labor was $313,577 on just AHUs ($.68/sq ft).
Chiller Killer II97 © Trane 2008Confidential
We can often increase capacity in a building up to 20-40% by simply changing chillers and utilizing existing pumps, piping, towers, and air units.
And reduce operating costs 15%- 40%
It’s a system approach!
Great Opportunity: Existing Buildings
Chiller Killer II98 © Trane 2008Confidential
LEED®
Chiller Killer II99 © Trane 2008Confidential
LEED –What are property managers, owners, developers saying?
• Virtually all prospective tenants are asking if building is “LEED Certified”
• Tenants are willing to pay a higher rental fee in “LEED Certified” Buildings
• We need to do “Sustainable Audits” on our existing buildings to analyze potential for “LEED Existing Building” certification
• Tenants say “Our customers want to do business with “Green” companies”
• We may not be able to sell the building if it is not “LEED Certified”
Chiller Killer II100 © Trane 2008Confidential
So are owner’s willing to pay more to get their building “LEED Certified”?
• 25 Story office building
• Bill had commitment on SWUDs, and VAV
• Owner decided to go for LEED certification
• System was upgraded to chilled water with EarthWise design to get LEED Certification
• Owner spent an additional $1,500,000 ($2 / sq.ft.) to do this
• Trane bill of material almost doubled
• What about commission?
Chiller Killer II101 © Trane 2008Confidential
It gets even better!
• 6 story office building• Bill sold SWUDs and VAV• Submittal approved and equipment in production
when owner decided to go for “LEED Certification”• Owner delayed building opening for 6 months while
system was redesigned to EarthWise Chilled Water System
• Owner paid $3,000,000 ( $20 / sq. ft.) in cancellation charges, change orders and upgrade fees to get the building certified!
I think we are on to something here
Chiller Killer II102 © Trane 2008Confidential
Ask for the Order
• Don’t forget to ask for the order!! • It’s most important when you work with engineers.• Don’t assume
“Are you going to be able to use our stuff on your schedules?”
“I’d like to help you develop the details on this project, is this going to work for you?”
Chiller Killer II103 © Trane 2008Confidential
Successful People don’t necessarily have the best of everything
They just make the best of everything they have.
Chiller Killer II104 © Trane 2008Confidential
In Summary
• Sell the systems
• Make sure we use all the tricks we have
• Embrace LEED
• Take the Accredited Professional test now
• Ask for the order
© Trane 2008 Confidential
Questions or Comments?