S-Series EarthWise™
CenTraVac™ Chiller
The Next
Generation of
Chiller Technology
Building on a Tradition of
Award-Winning Designs
 The Trane
EarthWise
CenTraVac
is the only
chiller ever
to receive
the U.S.
EPA’s
prestigious
Climate
Protection
Award.
Award Winning
Performance at both:
Full Load
Part Load
S-Series EarthWise
CenTraVac
What’s so unique about the
S-Series EarthWise CenTraVac?
And what technological
breakthrough results in this
unheard-of level of
sustainability?
It’s Oil-Free!
An Oil-Free Design:
What Makes It Better?
 Eliminates the potential
for oil contamination
 Improves efficiency and
reduces emissions
 Reduces both maintenance
and operating costs
 Enables a 40%-plus parts reduction
An Oil-Free Design:
What Makes It Possible?
Use of the low-pressure
refrigerant, HCFC-123
Direct-drive design
Hybrid ceramic bearings with
incredible hardness
Hybrid Ceramic Bearings
This
innovative
design
places
incredibly
hard
ceramic
balls inside
the steel
bearing
race.
Just How Hard Are These
Ceramic Balls?
If we place one of
these ceramic balls
on a concrete floor
and hit it with a
hammer, we might
just crack or dent the
floor and dent the
hammer head. But
there would be no
damage to the
ceramic ball.
Why is this incredible
hardness so beneficial?
 All-steel ball bearings are
susceptible to failure
 spalling
 pitting
 other
degradation
 Hybrid ceramic balls have
a “self-healing” effect that
helps prevent bearing failures
Direct-Drive Design
Eliminates Gears
Only two
main
bearings
require
lubrication
In Comparison:
Hermetic, Gear-Driven Design
Gears and
gear set
require
oil-based
lubrication
In Comparison:
Open Motor, Gear-Driven Design
Gears and
gear set
require
oil-based
lubrication
Low-pressure HCFC-123
enables direct-drive,
essential for an oil-free
design, and is why the
S-Series EarthWise
CenTraVac has worldclass efficiency.
Chiller Efficiency Progress
Efficiency in kW/ton
Year
1979
1990
1993
1995
1999
2002+
Average
.80
.65
.63
.61
.59
.58
Best
.72
.62
.55
.52
.48
.45
Best
“Other”
Best
HCFC-123
“TRANE"
Chiller Efficiency Comparison
Water-cooled chillers (all compressor types)
.90
.85
.80
Power (kW/ton)
.75
.70
HCFC22
HFC134a
.65
.60
.55
HCFC123
.50
.45
CFC–Free alternatives
S-Series
Environmental Benefits
 If every centrifugal chiller operated at 0.45
kW/ton vs. 0.54 kW/ton, annual power
plant emissions would be reduced by:
 Nearly
19 billion pounds of CO2
 Over 72 billion grams of SO2
 Over 30 billion grams of NOx
 Equivalent to:
 Taking
2 million cars off the road
 Planting over 500 million trees
And by
eliminating the oil,
the world’s simplest,
most reliable chiller
just got simpler!
And Simpler is Better!
Traditional Design
New Oil-Free Design
Simpler Means Fewer Parts
Even Greater Reliability
Gasketed
Joints
Soldered
Joints
Threaded
Welded
Fittings Components
Flared
Fittings
20%
30%
50%
70%
100%
Simplification:
made possible by
eliminating the oil;
and by eliminating the oil,
one eliminates the potential
for oil contamination!
Oil Contamination
% Efficiency Loss
Can Cause a Significant Loss in Efficiency
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
3.5% Oil in
Refrigerant =
8% Efficiency
Loss
1
2
3
4
5
% of Added Oil
6
7
8
And what would an 8%
efficiency impact be worth?
Consider the following:
A 1000-ton chiller
 2000 Equivalent Full-Load Operating Hours (EFLH)
 $0.08/kWh and $15/kW demand
 0.576 kW/ton (ASHRAE 90.1 minimum efficiency)
Given these assumptions, the estimated annual
energy cost would be:
1000 tons x 2000 EFLH x 0.576 kW/ton x $0.08/kWh = $92,160
1000 tons x 0.576 kW/ton x $15/kWh x 6 months = $51,840
$144,000
$144,000 x 8 percent = more than $11,520 per year or,
in current dollars over a 30-year lifetime, almost $350,000,
which is more than twice the initial cost of the chiller!
Older CFC Chillers May Have High
Levels of Oil Contamination
13% (Avg.)
Samples
3.5%
0
5
10
15
% of Oil in Refrigerant
Data taken from ASHRAE research project 601
20
25
However, the savings
don’t stop there!
By eliminating the oil
lubrication system,
refrigerant emissions
can also be reduced.
The Goal: A Hermetically Sealed,
Zero-Emissions Design
 As leak-free
as your home
refrigerator
The Goal: A Hermetically Sealed,
Zero-Emissions Design
 As leak-free
as your home
refrigerator
 When was the
last time you
added refrigerant
to your home
refrigerator?
The goal is to have the initial
charge be the final charge
Always an Optimal Charge
Never An Efficiency Loss
relative efficiency
100%
98%
96%
94%
92%
90%
60%
70%
80%
90%
100%
fraction of optimal charge
J. M. Calm, “Emissions and Environmental Impacts from Air-Conditioning
and Refrigeration Systems,” International Journal of Refrigeration, 2002
© JMC 2001
Savings
For the 1000-ton chiller,
eliminating 8% efficiency
loss could produce…
$144,000 x 0.08 x 0.5 =
Savings of over $5,760/year
Plus reduction of utility-generated
greenhouse-gas emissions by nearly
70,000 pounds of CO2
EarthWise Purge
World’s
best leakdetector
system
maintains
an optimum
refrigerant
charge and
peak
efficiency
ICS: The Key to Optimized Systems
and “Documented” Sustainability
This chiller is so reliable,
and has such low
emissions, that Trane
offers a 10-year, fullcoverage warranty – that
includes refrigerant loss.
Why not get competitive
bids and compare!
As impressive as the
S-Series Chiller is,
it’s just one element
in a highly efficient,
cost-effective
EarthWise System!
–$
+$
air handlers
+$
controls
Low Flow
Low Temperature
High Efficiency
ductwork
+$
–$
piping
+$
chillers
Major Benefits of the
EarthWise System Design
 Reduced operating and first cost
 Improved comfort
 Reduced air and water flow
 saves
space
 better acoustics
 improved IAQ
 Gives building owners an optimized
control solution with performance
that can be documented
Recap of the Major Benefits
S-Series EarthWise CenTraVac
 No more oil lubricants
 Hermetic, near-zero emissions,
leak-free design
 Lower total cost of ownership
 Most importantly –
documented, sustainable
performance
Doesn’t your next
job deserve the
very best?
Doesn’t it deserve an
S-Series EarthWise
CenTraVac