0
Achieving High ChilledWater Delta Ts
Chillers Plant-Main Components
Cooling
Tower

Load
AHU
FCU
FAHU

Chilled Water Pump
Quizzes as introduction
What is High Delta Temp.?

13’C
56’F

4.5’C
40’F
If Chiller Maximum Cap. is 600 TR: It can COOL 1000 gpm of CH.W.
4.5’C

40’F

Delta T: 16’F (9’C)
CH. Optimum Operation
4....
The

Challenges-
Chillers

Pumps
Cooling
Towers
Energy
Meters
Occupants
Satisfaction
Enviro.
Effect

What will happen to CH. W. Sys. Compon...
gpm
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000

Delta-T

1
2
3
4
5
6
7
8
9
10
11
12
1...
1-Chiller & 1-Pump is Working to Deliver 600 TR @ Delta Temp.: 15’F
4.5’C

5.5’C

40’F

42’F

600- TR/Chiller
1000
gpm/
Pu...
gpm
500
600
700
800
900
1000
1400
1100
1200
1500
1800
2000
2500
3000
4000

Delta-T

4
4
4
4
4
4
4
4
4
4
4
4
4
4
4

TR
83.3...
5-Chillers & 5-Pumps are Working to Deliver 600 TR @ Delta Temp.: 4’F
4.5
’C
40’F

12.2
’C
54’F

600- TR/Chiller
4000gpm
P...
If we have a Building Load 600 TR: How many Chiller we will Work?

3’F
6’F

9’F
12’F

16’F

5000
gpm

4000
gpm

3000
gpm

...
If we have a Building Load 600 TR: How many Chiller we will Work?

Inefficient Operation

Optimum Operation
4.5’C

4.5’C

...
Chillers
Pumps
Cooling
Towers
Energy
Meters
Occupants
Satisfaction
Enviro.
Effect (-)

What will happen to Power Consumpti...
Chillers
Pumps
Cooling
Towers
Energy
Meters
Occupants
Satisfaction
Enviro.
Effect

What will happen to Power Consumption R...
Chillers

Pumps
Cooling
Towers
Energy
Meters
Occupants
Satisfaction

What will happen to Power Consumption Ratio
when the ...
ResultsOnce high
chilled-water
Delta Ts is
achieved, mo
re Btu’s (J/s)
of cooling
will be
accomplished
per gallon
(liter) ...
ResultsPressure losses
and pumping
energy will
decline
considerably in
existing
hydronic cooling
systems and
smaller pumps...
ResultsAlso, water chiller
capacities will
no longer be
limited by
maximum
cooler flow
rates chilledwater storage
tanks wi...
ResultsThis
fundamental
approach
provides
significant, en
during
improvements
in the
performance
of variableflow hydronic
...
ResultsMaximize the
cooling
efficiency
of Cooling
Coil and
prevent
over
flooding of
CH. Water
& increase
Delta-T
ResultsAnther
important
benefit is
the cooling
transferred
from
Primary
Circuit to
Secondary
Circuit
1’C+/-1’C
ResultsThe efficient
cooling &
pumping
means less
Working:
• Chillers.
• C. Towers.
• Pumps.
• Dhs Per TR.

•
•
•
•
The Challenge: How to achieve & maintain
High Delta-T?
Estimate of Situation: The Need for Balancing
and/or re-balancing of CH. W. Flow System.
ASHRAE

3- Automatic
Flow Limiting
Valves
2- Manual
Balance
Using DRV
Method
1- No
Balancing
Method

5- Oversized
Main Pip...
ASHRAE

-

Basic of “ASHRAE”: No Balancing required
except Manual Balance Method using DRV.
- -

We like to take you today in a small journey to
test possible solutions step-by-step.
Agenda:
• Identify Possible Reasons for
Low Delta-T and quantify effect
of peak heating load?
• Design an automatic contro...
How DC-Provider Can Achieve High Delta?

When CH.W. Pumps are located below loads, How can u transfer Cooling?
The 5th Annual Middle East District
Our Solution
has revealed at: Cooling Summit – 2013 @ Qatar

WORKSHOP
Partners
How to Call us ?
To benefit from our
Services:
• Consultancies.
• Corrections.

Call:
Dr. Taoufik A. Hadi
Eng. Juma Yousef...
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How to achieve high chilled water delta temp. for 5th dc summit-2013 in qatar-by getco

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This how easy we can control Delta-T
as per your wish:
"You Wish, We Control"
Benefits:

* Achieve High Delta-T across Load & PHX.
* Allow indoor unit to absorb maximum cooling from limited chilled water
* Less pumping.
* Fewer number of chillers working.
* Optimize working chillers & improve efficiency.
* Less Cooling Towers working and connected condenser pumps.
* Improve Cooling Effect indoor.
* Control Humidity level
* More & More ...... Satisfied Occupants & Peace of mind.
* Reduce your Cost Per TR

Looking forward to Repeat the Same Success @ your Premises.

Published in: Technology, Business
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Transcript of "How to achieve high chilled water delta temp. for 5th dc summit-2013 in qatar-by getco"

  1. 1. Achieving High ChilledWater Delta Ts
  2. 2. Chillers Plant-Main Components Cooling Tower Load AHU FCU FAHU Chilled Water Pump
  3. 3. Quizzes as introduction
  4. 4. What is High Delta Temp.? 13’C 56’F 4.5’C 40’F
  5. 5. If Chiller Maximum Cap. is 600 TR: It can COOL 1000 gpm of CH.W. 4.5’C 40’F Delta T: 16’F (9’C) CH. Optimum Operation 4.5’C 13.5’C 40’F 56’F Delta T: 3’F (1.5’C) CH. Inefficient Operation 6’C 43’F
  6. 6. The Challenges-
  7. 7. Chillers Pumps Cooling Towers Energy Meters Occupants Satisfaction Enviro. Effect What will happen to CH. W. Sys. Components when Delta Temp. Differ (Keep Changing)?
  8. 8. gpm 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 Delta-T 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 TR 42 83 125 167 208 250 292 333 375 417 458 500 542 583 625 667 Can same-GPM transfer more Cooling if Delta Temp. Increases?
  9. 9. 1-Chiller & 1-Pump is Working to Deliver 600 TR @ Delta Temp.: 15’F 4.5’C 5.5’C 40’F 42’F 600- TR/Chiller 1000 gpm/ Pump 13.5’C 14.5’C 56’F 58’F
  10. 10. gpm 500 600 700 800 900 1000 1400 1100 1200 1500 1800 2000 2500 3000 4000 Delta-T 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 TR 83.3 100 117 133 150 167 233 183 200 250 300 333 417 500 667 When Delta Temp. is fixed, how many TR can be transfer when flow change?
  11. 11. 5-Chillers & 5-Pumps are Working to Deliver 600 TR @ Delta Temp.: 4’F 4.5 ’C 40’F 12.2 ’C 54’F 600- TR/Chiller 4000gpm Pump 6.7 ’C 44’F 14.5 ’C 58’F
  12. 12. If we have a Building Load 600 TR: How many Chiller we will Work? 3’F 6’F 9’F 12’F 16’F 5000 gpm 4000 gpm 3000 gpm 2000 gpm 1000 gpm
  13. 13. If we have a Building Load 600 TR: How many Chiller we will Work? Inefficient Operation Optimum Operation 4.5’C 4.5’C 40’F 40’F 6.7’C 13’C 44’F 56’F
  14. 14. Chillers Pumps Cooling Towers Energy Meters Occupants Satisfaction Enviro. Effect (-) What will happen to Power Consumption Ratio when Delta T decreases? (Low T. Syndrome)
  15. 15. Chillers Pumps Cooling Towers Energy Meters Occupants Satisfaction Enviro. Effect What will happen to Power Consumption Ratio when Delta T increases? (High T. Syndrome)
  16. 16. Chillers Pumps Cooling Towers Energy Meters Occupants Satisfaction What will happen to Power Consumption Ratio when the need for CH. W. Flow decrease?
  17. 17. ResultsOnce high chilled-water Delta Ts is achieved, mo re Btu’s (J/s) of cooling will be accomplished per gallon (liter) of chilled-water distributed. gpm 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 Delta-T 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 TR 41.7 83.3 125.0 166.7 208.3 250.0 291.7 333.3 375.0 416.7 458.3 500.0 541.7 583.3 625.0 J/S)
  18. 18. ResultsPressure losses and pumping energy will decline considerably in existing hydronic cooling systems and smaller pumps and piping may be installed in new hydronic cooling systems. hydronic One Working Pump Compare to 5-Pumps hydronic
  19. 19. ResultsAlso, water chiller capacities will no longer be limited by maximum cooler flow rates chilledwater storage tanks will store many more ton/hours (MJ) of cooling. MJ
  20. 20. ResultsThis fundamental approach provides significant, en during improvements in the performance of variableflow hydronic cooling systems. hydronic
  21. 21. ResultsMaximize the cooling efficiency of Cooling Coil and prevent over flooding of CH. Water & increase Delta-T
  22. 22. ResultsAnther important benefit is the cooling transferred from Primary Circuit to Secondary Circuit 1’C+/-1’C
  23. 23. ResultsThe efficient cooling & pumping means less Working: • Chillers. • C. Towers. • Pumps. • Dhs Per TR. • • • •
  24. 24. The Challenge: How to achieve & maintain High Delta-T?
  25. 25. Estimate of Situation: The Need for Balancing and/or re-balancing of CH. W. Flow System.
  26. 26. ASHRAE 3- Automatic Flow Limiting Valves 2- Manual Balance Using DRV Method 1- No Balancing Method 5- Oversized Main Piping Method 4- Reverse Return Method Basic: Since “ASHRAE” approved 5 Methods of Chilled Water Piping
  27. 27. ASHRAE - Basic of “ASHRAE”: No Balancing required except Manual Balance Method using DRV.
  28. 28. - - We like to take you today in a small journey to test possible solutions step-by-step.
  29. 29. Agenda: • Identify Possible Reasons for Low Delta-T and quantify effect of peak heating load? • Design an automatic control system that will higher Delta-T • Fix the control system and commission, also keep monitoring the performance. • Ensure system capacity to treat dehumidification preciously while trying to control high DT . • Balance the comfort with efficiency and energy saving. • Suggest New Specifications with connected Load. : • • • • • • ---
  30. 30. How DC-Provider Can Achieve High Delta? When CH.W. Pumps are located below loads, How can u transfer Cooling?
  31. 31. The 5th Annual Middle East District Our Solution has revealed at: Cooling Summit – 2013 @ Qatar WORKSHOP Partners
  32. 32. How to Call us ? To benefit from our Services: • Consultancies. • Corrections. Call: Dr. Taoufik A. Hadi Eng. Juma Yousef Mobile: +971-50-4948385 jumayjuma@gmail.com • •
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