chilled water loop optimization...chilled water loop optimization • kazimir gasljevic • richard...
TRANSCRIPT
![Page 1: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/1.jpg)
Chilled Water Loop
Optimization
• Kazimir Gasljevic
• Richard Dewey
• Sandro Sanchez
![Page 2: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/2.jpg)
![Page 3: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/3.jpg)
![Page 4: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/4.jpg)
WHAT WE STARTED WITH:
LOOP OUTLINE:
![Page 5: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/5.jpg)
WHAT WE STARTED WITH:
LOOP OUTLINE:
- Justification for the loop
![Page 6: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/6.jpg)
WHAT WE STARTED WITH:
LOOP OUTLINE:
- Justification for the loop
Value of the loop piping, $10 Million Vs. Value of the
chillers on the loop, $5 Million
![Page 7: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/7.jpg)
WHAT WE STARTED WITH:
LOOP OUTLINE:
- The game changed after the introduction of
variable speed chillers
![Page 8: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/8.jpg)
WHAT WE STARTED WITH:
LOOP OUTLINE:
- The game changed after the introduction of
variable speed chillers
•There will probably be no further expansion of the
loop.
![Page 9: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/9.jpg)
WHAT WE STARTED WITH:
LOOP OUTLINE:
- The game changed after the introduction of
variable speed chillers
•There will probably be no further expansion of the
loop.
•Modular variable speed chillers are the better way to go
in our climate.
![Page 10: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/10.jpg)
WHAT WE STARTED WITH:
ORIGINAL CONTROLS CONCEPT:
![Page 11: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/11.jpg)
WHAT WE STARTED WITH:
ORIGINAL CONTROLS CONCEPT:
• Focused mostly on functionality with not much concern
given to efficiency issues.
![Page 12: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/12.jpg)
WHAT WE STARTED WITH:
OVERALL LOOP ENERGY EFFICIENCY:
![Page 13: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/13.jpg)
WHAT WE STARTED WITH:
OVERALL LOOP ENERGY EFFICIENCY:
• 0.85 kW/ton, 0.8 kW/ton after installation of the variable
speed chiller.
![Page 14: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/14.jpg)
SCOPE OF THE MBCx
PROJECT:
![Page 15: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/15.jpg)
SCOPE OF THE MBCx
PROJECT:
An MBCx project focused on improving existing
hardware with better usage and controls (no
capital costs).
![Page 16: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/16.jpg)
SCOPE OF THE MBCx
PROJECT:
FUNCTIONALITY:
![Page 17: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/17.jpg)
SCOPE OF THE MBCx
PROJECT:
FUNCTIONALITY:
• To automatically maintain a constant Differential
Pressure, as well as staging the chillers off and on
smoothly.
![Page 18: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/18.jpg)
SCOPE OF THE MBCx
PROJECT:
ENERGY EFFICIENCY:
![Page 19: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/19.jpg)
SCOPE OF THE MBCx
PROJECT:
ENERGY EFFICIENCY:
• Improve the efficiency of all chiller plants.
![Page 20: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/20.jpg)
SCOPE OF THE MBCx
PROJECT:
EXTRAS:
![Page 21: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/21.jpg)
SCOPE OF THE MBCx
PROJECT:
EXTRAS:
• Critical cooling
• Use loop thermal capacity for load shedding
• Leak detection and leak location.
![Page 22: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/22.jpg)
STRATEGY:
![Page 23: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/23.jpg)
STRATEGY:
Hiring Consultants
vs.
Doing the work in House:
![Page 24: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/24.jpg)
STRATEGY:
Hiring Consultants
vs.
Doing the work in House:
• "Fits all" algorithm vs. "algorithm for a given situation“
• Intimate Knowledge of the plant
![Page 25: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/25.jpg)
STRATEGY:
OTIMIZATION METHODOLOGY:
![Page 26: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/26.jpg)
STRATEGY:
OTIMIZATION METHODOLOGY:
• Sacrifice slightly on the ideal mathematical optimum for
a robust sustainable system.
• Take in to account temporal changes in the performance
of the system components.
![Page 27: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/27.jpg)
OPTIMIZATION
ALGORITHM :
![Page 28: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/28.jpg)
OPTIMIZATION
ALGORITHM :
Optimization of the Loop
![Page 29: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/29.jpg)
OPTIMIZATION
ALGORITHM :
• Decide which chillers to run based on the capacity and
efficiency of individual chillers.
Optimization of the Loop
![Page 30: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/30.jpg)
OPTIMIZATION
ALGORITHM :
• Decide which chillers to run based on the capacity and
efficiency of individual chillers.
• Decide the Condenser Water temperature set point.
Optimization of the Loop
![Page 31: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/31.jpg)
OPTIMIZATION
ALGORITHM :
• Decide which chillers to run based on the capacity and
efficiency of individual chillers.
• Decide the Condenser Water temperature set point.
• Decide the Differential Pressure set point (constant for
now).
Optimization of the Loop
![Page 32: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/32.jpg)
OPTIMIZATION
ALGORITHM :
• Decide which chillers to run based on the capacity and
efficiency of individual chillers.
• Decide the Condenser Water temperature set point.
• Decide the Differential Pressure set point (constant for
now).
• Consider a needed cooling capacity of the loop in the
immediate future (few hours), based on the time of day
and the weather forecast.
Optimization of the Loop
![Page 33: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/33.jpg)
0
0.2
0.4
0.6
0.8
1
1.2
0 200 400 600 800 1000 1200
Eff
icie
ncy
[k
W/t
on
]
Load [tons]
Chiller Efficiencies at 74 F Condenser Temp and 42 F Supply Temp
ESB
CNSI
Bren
Library
Chemistry, Broida
ENG 1
BIO 2
![Page 34: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/34.jpg)
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
0 200 400 600 800 1000 1200
Eff
icie
ncy
[k
W/t
on
]
Load [tons}
Plant efficiencies at WB 60 F
ESB
CNSI
Bren
Library
Chemistry
ENG 1
BIO 2
Broida
![Page 35: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/35.jpg)
OPTIMIZATION
ALGORITHM :
Optimization of individual chillers
![Page 36: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/36.jpg)
OPTIMIZATION
ALGORITHM :
● Balancing power for compressor, cooling tower fan,
condenser pump. Use performance curves updated for the
momentary changes (maintenance issues etc.)
Optimization of individual chillers
![Page 37: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/37.jpg)
0
10
20
30
40
50
60
70
80
90
100
0 20 40 60 80 100 120 140
Tem
per
atu
re [
F]
Time [Minutes]
ESB Chiller Temperatures
Condenser Refrigerant
Condenser Water Supply
Air Wet Bulb
Condenser Water Return
Evaporator Water
Return
Evaporator Water
Supply
Evaporator Refrigerant
Condenser
Evaporator
Condenser Pump
Cooling Tower
Del
iver
ed
Ch
ille
r L
oa
din
g
![Page 38: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/38.jpg)
0
1
2
3
4
5
6
7
0 100 200 300 400 500 600 700 800 900
Ap
pro
ach
= T
sat
-T c
hw
[F
]
Tons
ESB Condenser Problem, 8/26/2014
Before Cleaning
Ideal
After First Cleaning
After Second Cleaning
![Page 39: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/39.jpg)
0
5
10
15
20
25
30
35
0 5 10 15 20 25 30 35 40 45
Ap
pro
ach
Tem
p [
F]
Fan power (both) [HP]
Broida Cooling Tower Performance (BAC model)
100% speed 90% speed 80% speed 60% speed
55 F WB, 100% load
55 F WB, 50% Load
70 F WB, 100% Load
70 F WB, 50% Load
100% Load = 8.2 kW/F
50% Load = 4.2 kW / F
55 WB, 75% Load
70F WB, 75% Load
1.2 F
1.8 F
2.5 F
2.4 F
3.6 F
4.8 F
3.33 F
5 F
6.66 F
4.3 F
6.45 F
8.6 F
1.8 F
2.7 F
3.6 F
0.6 F
0.9 F
1.2 F
3 F
4.5 F
6 F
100%
75%
50%
How many F App T can be increased at any fan power saving before compressor power increase becomes larger than fan power reduction.
1 HP = 0.84 kW (0.9 motor efficiency)
70% speed
![Page 40: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/40.jpg)
50, 19
75, 18
100, 17
50, 14.5
75, 13.75
100, 13
y = -0.04x + 21
y = -0.03x + 16
10
11
12
13
14
15
16
17
18
19
20
0 20 40 60 80 100 120
Ap
pro
ach
Tem
[F
]
Chiller Load %
Broida; Cooling Tower Approach Set Point
WB 55 F
WB 70 F
Linear (WB 55 F)
Linear (WB 70 F)
For a given % load: AT = (AT55WB - AT70WB) * (70 - WB) / 15
Add few F for a degraded cooling tower performance (determine experimentally)
![Page 41: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/41.jpg)
MEASUREMENTS:
![Page 42: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/42.jpg)
MEASUREMENTS:
● Typically electrical power OK, tons not OK.
![Page 43: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/43.jpg)
MEASUREMENTS:
● Typically electrical power OK, tons not OK.
● Uncertainty in a typical Btu measurement is in the
range of improvements one is trying to achieve.
![Page 44: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/44.jpg)
MEASUREMENTS:
● Typically electrical power OK, tons not OK.
● Uncertainty in a typical Btu measurement is in the
range of improvements one is trying to achieve.
● Temperature measurements
![Page 45: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/45.jpg)
MEASUREMENTS:
● Typically electrical power OK, tons not OK.
● Uncertainty in a typical Btu measurement is in the
range of improvements one is trying to achieve.
● Temperature measurements
● Flow rate measurements.
![Page 46: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/46.jpg)
MEASUREMENTS:
● Typically electrical power OK, tons not OK.
● Uncertainty in a typical Btu measurement is in the
range of improvements one is trying to achieve.
● Temperature measurements
● Flow rate measurements.
● Improving measurements may amount to a third of the
total effort.
![Page 47: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/47.jpg)
CONCLUSIONS:
![Page 48: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/48.jpg)
CONCLUSIONS: ● 0.63 kW/ton a yearly average compared with 0.8
kW/ton baseline.
![Page 49: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/49.jpg)
CONCLUSIONS: ● 0.63 kW/ton a yearly average compared with 0.8
kW/ton baseline.
● With 11 bill tons annual cooling load, we used 8.8 mil
kWh before and 6.93 kWh after.
![Page 50: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/50.jpg)
CONCLUSIONS: ● 0.63 kW/ton a yearly average compared with 0.8
kW/ton baseline.
● With 11 bill tons annual cooling load, we used 8.8 mil
kWh before and 6.93 kWh after.
● Annual savings 1.87 mill kWh = $225,000
![Page 51: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/51.jpg)
CONCLUSIONS: ● 0.63 kW/ton a yearly average compared with 0.8
kW/ton baseline.
● With 11 bill tons annual cooling load, we used 8.8 mil
kWh before and 6.93 kWh after.
● Annual savings 1.87 mill kWh = $225,000
● Additional energy savings thanks to the improved
functionality (maintaining a desired chilled water
temperature and pressure differential).
![Page 52: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/52.jpg)
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
0 100 200 300 400 500 600 700 800
Eff
icie
ncy
[k
W/t
on
]
Time [h]
Loop Efficiency September 2014
Measured: Average 0.64 kW/ton
Baseline: 0.8 kW/ton
Linear (Measured: Average 0.64 kW/ton)
![Page 53: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/53.jpg)
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
0 100 200 300 400 500 600 700
Eff
icie
ncy
[k
W/t
on
]
Time [h]
Loop Efficiency June 2015
Measured: Average 0.625 kW/ton
Baseline: 0.8 kW/ton
Linear (Measured: Average 0.625
kW/ton)
![Page 54: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/54.jpg)
CONCLUSIONS:
![Page 55: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/55.jpg)
CONCLUSIONS:
REMAINS TO BE DONE:
![Page 56: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/56.jpg)
CONCLUSIONS:
● What we have achieved is a near optimum and further
improvements are to be done in both areas of control
(optimize the loop and optimize individual chillers).
REMAINS TO BE DONE:
![Page 57: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/57.jpg)
CONCLUSIONS:
● What we have achieved is a near optimum and further
improvements are to be done in both areas of control
(optimize the loop and optimize individual chillers).
● About 70% of the expected total improvement in
efficiency achieved , 30% remains to be done.
REMAINS TO BE DONE:
![Page 58: Chilled Water Loop Optimization...Chilled Water Loop Optimization • Kazimir Gasljevic • Richard Dewey • Sandro Sanchez . ... cooling tower fan, condenser pump. Use performance](https://reader030.vdocument.in/reader030/viewer/2022040921/5e98f7a8d1e65602bd7cd136/html5/thumbnails/58.jpg)
THANK YOU!