رسالتي إلى المؤتمر الخامس لحوار تبريد المناطق 2021 في دبي وفرص السوق الحقيقية - م. جمعة My Message to the 5th DC Dialogue 2021 in Dubai & TRUE Market Opportunity - by Eng. Juma

1. MY MESSAGE TO 5TH DC DIALOGUE 2021‫رسالتى‬
Many DC Plants &
Provider
THE PROGRAM
AIMS TO INCREASE
PENETRATION OF
DISTRICT COOLING FROM
16% OF REFRIGERATION
CAPACITY IN 2011 TO
40% IN 2030
• http://taqati.ae/report/2018/#dsm

2. NOW,
MORE
INVESTOR
AVOID TO BUY
PREMISES
CONNECTED TO
DC PLANT
Less
cooling
at higher
floors
More BTU
Meter
consumpti
on at lower
floors
complain
s
because
of air
bubbles
at sys
internal
Heavy FINES
from District
Cooling Provider
Less comfort for
occupants, owners
and service
provider
‫زبائن‬ ‫مشاكل‬ ‫لحل‬ ‫فرصة‬
‫المناطق‬ ‫تكييف‬
OPP. TO RECTIFY
DC CLIENT
CHALLENGES

3. BLD HANDING-OVER CHALLENGES– ‫لتسهيل‬ ‫فرصة‬
‫المباني‬ ‫تسليم‬
Building work
done
Nobody allow to
occupy because
building under
Commissioning
The Commissioning
Co. straggling to
balance the CH. W.
System.
All parts are
working, but
integration is not
happening.
FCU Working, Fittings
Working and Control
functioning, but cooling is
not perfect, while Delta-T
is low.
Occupants are
suffering from loose
control.
CHW Sys. is variable
and readings keep
changing while
performance is not
matching design.
Finally, the
commissioning Co. do
submit tables that not
related to actual
performance, just to

4. HOW WE CAN INCREASE THE
PENETRATION OF DC TO 40% BY 2030,
WHEN
• Existing clients are suffering from less comfort.
• Existing clients are suffering from high bills without the comfort they
deserve.
• Existing clients are suffering from heavy fines.
• New developers are avoiding investing in DC Areas.
• New buyers are avoiding buying in DC Buildings connected to DC-
Plant.
• New tenants are avoiding renting in DC Buildings connected to DC-
Plant.
• Priorities of existing management are not inline with the notion.

5. Dubai residents suffer as district
cooling bills jump - Arabianbusiness
District cooling: Cool discomfort | Uae – Gulf
News

6. LET’S SHARE AN EXAMPLE
…...
In Dubai …… ‫فى‬
‫دبي‬
labour sleeping in Sonapur camps in
Dubai
Your Client is bleeding heavy fines issued by
DC Provider because of Low CHW Delta-T.
Occupants are not getting the Comfort they
deserve because of low performance.
Fresh Air is not dry enough to avoid
condensation and fungus because of high
inlet CHW Temperature.
The BMS is disconnected because you are
trying to create manual balancing.
VFD’s are sited at high frequency to
because you are trying to reduce air buckets
at farthest units.

7. THE CHALLENGES OF LOW CHW DELTA-T IS
BECAUSE OF ‘’LACK OF UNDERSTANDING’’
Lack of understanding how to provide Cost Effective Comfort the Occupants
deserve, without Fines, and/or energy wastage.
The ART of balancing comfort,
performance and efficiency is
our work.
It’s an ART …

8. THE CHALLENGES OF LOW CHW DELTA-T IS
BECAUSE OF ‘’LACK OF UNDERSTANDING’’
Lack of understanding that we should deal with 4 Delta-Ts, not one.
Lack of understanding the relation between Delta-T that control
primary circuit, compare to Delta-P that control the secondary
circuit..
Lack of understanding the different between static pressure and
dynamic flow.
Lack of understanding how to match the water flow across the
PHX.
Lack of understanding the right signal setting to automatically
modulate the CHW flow, by the right signal type at the right signal
location.

9. ‫عالية؟‬ ‫حرارة‬ ‫درجة‬ ‫بفرق‬ ‫نعنى‬ ‫ماذا‬
WHAT IS HIGH DELTA TEMP.?
•Delta T (ΔT)= change in temperature
 “The ΔT”
- Facilities: across cooling unit coils
(Δ between supply and return)
 There are actually 4 ΔT’s

10. THE 4ΔT’S: TO ENSURE EFFICIENCY,
PERFORMANCE & COMFORT
1
2
3
4
4
‫الحرارة‬ ‫لدرجات‬ ‫فروق‬
:
‫الر‬ ‫و‬ ‫والفعالية‬ ‫الكفاءة‬ ‫لضمان‬
‫احة‬

11. 1. Primary ΔT to ensure
DC-Plant efficiency.
2. Secondary ΔT across
PHX to ensure full heat
transfer.
3. Chilled Water ΔT
Through cooling unit to
ensure performance.
4. Cold Air ΔT Through
cooling unit to ensure
comfort.
11
The 4 ΔT’s: to ensure Efficiency, Performance & Comfort
4
‫الحرارة‬ ‫لدرجات‬ ‫فروق‬
:
‫الر‬ ‫و‬ ‫والفعالية‬ ‫الكفاءة‬ ‫لضمان‬
‫احة‬
.1
‫التبري‬ ‫مياه‬ ‫حرارة‬ ‫درجة‬ ‫فرق‬
‫د‬
‫مص‬ ‫كفاءة‬ ‫لضمان‬ ‫اإلبتدائية‬
‫نع‬
‫التبريد‬
.
.2
‫التبري‬ ‫مياه‬ ‫حرارة‬ ‫درجة‬ ‫فرق‬
‫د‬
‫الحم‬ ‫معالجة‬ ‫لضمان‬ ‫الثانوية‬
‫ل‬
‫الحرارى‬
.
.3
‫ملف‬ ‫عبر‬ ‫الحرارة‬ ‫درجة‬ ‫فرق‬
‫األداء‬ ‫لضمان‬ ‫التبريد‬
.
.4
‫عبر‬ ‫الهواء‬ ‫حرارة‬ ‫درجة‬ ‫فرق‬
‫الراحة‬ ‫لضمان‬ ‫التبريد‬ ‫ملف‬
.

12. OUR OFFER FOR YOU, YOUR BUILDING, YOUR
CLIENT THE
‘’ MONITORING & CONTROLLING ’’
Monitoring & Controlling of the 4 Delta-Ts, not one.
Monitoring & Controlling of the right relation between Delta-T that
control primary circuit, compare to Delta-P that control the secondary
circuit..
Monitoring & Controlling of the right dynamic flow.
Monitoring & Controlling of how the flow across the PHX to match
each both sides.
Monitoring & Controlling of the right signal setting to automatically
modulate the CHW flow, by the right signal type at the right signal
location.

13. ‫المنطقية‬ ‫النتيجة‬
......
CONCLUSION
Technology
Is
A TOOL
People
Are
The KEY
‫التكنولوجيا‬
‫مجرد‬
‫أداة‬
‫الناس‬
‫هم‬
‫األساس‬

14. AFTER UNDERSTANDING ALL
THE VARIABLES, EVALUATE
THE ACTUAL PERFORMANCE,
WE CAN SUGGEST
UPGRADING IN UPSCALING
LEVELS, FROM: NO, LOW,
MEDIUM & HIGH COST
OPTIONS
THIS NOT UN-EASY BALANCE: IT’S
AN ART

15. ‫على‬ ‫االتصال‬ ‫يمكنك‬ ‫للتواصل‬
:
‫م‬
.
‫جمعة‬
‫صالح‬
FOR SUPPORT KINDLY CONTACT: ENG.
JUMA SALEH
https://www.linkedin.com/in/juma-yousef-j-
saleh-
jumayjuma@gmail.co
m
+962-7-9074-6811 (‫)النقال‬
Mobile
https://www.facebook.com/green
earthtechnologycompany
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