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.

1. Achieving High ChilledWater Delta Ts

2. Chillers Plant-Main Components
Cooling
Tower
Load
AHU
FCU
FAHU
Chilled Water Pump

3. Quizzes as introduction

4. What is High Delta Temp.?
13’C
56’F
4.5’C
40’F

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. The
Challenges-

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. 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. 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. 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. 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. 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. 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. 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. 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. Chillers
Pumps
Cooling
Towers
Energy
Meters
Occupants
Satisfaction
What will happen to Power Consumption Ratio
when the need for CH. W. Flow decrease?

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. 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. 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. ResultsThis
fundamental
approach
provides
significant, en
during
improvements
in the
performance
of variableflow hydronic
cooling
systems.
hydronic

21. ResultsMaximize the
cooling
efficiency
of Cooling
Coil and
prevent
over
flooding of
CH. Water
& increase
Delta-T

22. ResultsAnther
important
benefit is
the cooling
transferred
from
Primary
Circuit to
Secondary
Circuit
1’C+/-1’C

23. ResultsThe efficient
cooling &
pumping
means less
Working:
• Chillers.
• C. Towers.
• Pumps.
• Dhs Per TR.
•
•
•
•

24. The Challenge: How to achieve & maintain
High Delta-T?

25. Estimate of Situation: The Need for Balancing
and/or re-balancing of CH. W. Flow System.

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

28. - -
We like to take you today in a small journey to
test possible solutions step-by-step.

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.
:
•
•
•
•
•
•
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30. How DC-Provider Can Achieve High Delta?
When CH.W. Pumps are located below loads, How can u transfer Cooling?

31. The 5th Annual Middle East District
Our Solution
has revealed at: Cooling Summit – 2013 @ Qatar
WORKSHOP
Partners

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
•
•