All about humidity and comfort by eng. juma yousef juma getco

All about Humidity and Comfort
‫عالقتها‬ ‫و‬ ‫الرطوبة‬ ‫عن‬ ‫معرفته‬ ‫تريد‬ ‫ما‬ ‫كل‬
‫بالراحة‬
Step-by-Step for Diagnosing of Condensation
of High Humidity & Rectification

‫مهمة؟‬ ‫الرطوبة‬ ‫لماذا‬Why Humidity
Matter?
‫نقضى‬ ‫ألننا‬80%‫فى‬ ‫حياتنا‬ ‫من‬
‫مستوى‬ ‫فإن‬ ‫المغلقة‬ ‫األماكن‬
‫لص‬ ‫جدا‬ ‫مهمة‬ ‫النسبية‬ ‫الرطوبة‬‫حة‬
‫حياتنا‬.
Relative humidity is an
important parameter for
human comfort since: we
spend in average 80% of
our life indoor.

‫الرطوبة؟‬ ‫هي‬ ‫ما‬What’s Humidity?
Humidity-Simply: the amount
of water vapor in the air
‫بإختصار‬ ‫الرطوبة‬:‫ف‬ ‫الماء‬ ‫بخار‬ ‫كمية‬‫ى‬
‫الهواء‬

‫علينا؟‬ ‫الرطوبة‬ ‫تؤثر‬ ‫كيف‬
How Does Humidity Affect Us?
Humidity is important for our comfort and our health.
Humidity has been linked to sleepiness, lethargy, lack of
observations, lower observation skills and irritability.
It is what gives you that horrible sticky feeling on a hot day
and can cause heat stroke

‫مرتفع‬/‫الرطوبة‬ ‫مستوى‬ ‫منخفض‬:‫البك‬ ‫لنمو‬ ‫مالئمة‬ ‫بيئة‬‫تيريا‬
Too Low/High Humidity–Dust, Dust Mites,
Pollen, Viruses, and Bacteria.

‫الرطوبة‬ ‫على‬ ‫السيطرة‬
‫بمستوى‬ ‫الداخل‬ ‫فى‬
30%-60%
Maintain Indoor
Humidity Levels
between 30% to
60%
‫المطلوبة‬ ‫الراحة‬ ‫مستويات‬ ‫لتحقيق‬ ‫التحديات‬
Challenges toward Achieve Comfort
G.
Role
‫قاعدة‬
‫عامة‬

little humidity can dry out and damage furniture. In
contrast, too much humidity can cause moisture stains,
condensation, swelling, and mold.

High humidity
case
condensation
with air and
light, Mold
and Fungus
will grow
‫مستوى‬ ‫إرتفاع‬
‫تكثف‬ ‫و‬ ‫الرطوبة‬
‫سط‬ ‫على‬ ‫قطراته‬‫ح‬
‫و‬ ‫الهواء‬ ‫حول‬
‫ضو‬ ‫عليه‬ ‫يسقط‬‫ء‬,
‫ب‬ ‫يمثل‬ ‫ذلك‬ ‫فإن‬‫يئة‬
‫العف‬ ‫لنمو‬ ‫مثالية‬‫ن‬.

‫العفن؟‬ ‫ينمو‬ ‫كيف‬How Mold Grow?
. It's the Indoors we are concerned
with. Mold growth should be
avoided. Problems may arise when
mold starts eating away at
materials, affecting the look, smell,
and possibly wood-framed
buildings, affecting the structural
integrity of the buildings. Molds
can grow on virtually any
substance, as long as moisture or
water, oxygen, and an organic
source are present. Molds
reproduce by creating tiny spores
(viable seeds) that usually cannot
be seen without magnification.
•‫عنده‬‫عل‬ ‫لتأثر‬ ‫العفونة‬ ‫تنبت‬‫ى‬
‫الجب‬ ‫وديكورات‬ ‫الخشبية‬ ‫المواد‬‫س‬
‫حتى‬ ‫البيت‬ ‫موجودات‬ ‫وكافة‬
‫المالبس‬.
•‫وتص‬ ‫عليه‬ ‫تنمو‬ ‫ما‬ ‫كل‬ ‫فتفسد‬‫در‬
‫أمراضا‬ ‫وتسبب‬ ‫كريه‬ ‫روائح‬
‫مختلفة‬.
•‫سرعان‬ ‫فهي‬ ‫بالنمو‬ ‫تبدأ‬ ‫وعندما‬‫ما‬
‫أرج‬ ‫كافة‬ ‫فى‬ ‫باإلنتشار‬ ‫تبدأ‬‫اء‬
‫ترى‬ ‫ال‬ ‫بذور‬ ‫خالل‬ ‫من‬ ‫البيت‬
‫المجردة‬ ‫بالعين‬.
‫العفونة؟‬ ‫تكون‬Mold Formation?

‫عفونة‬:‫الهواء‬ ‫فتحات‬
Moldy: Air Diffusers

‫عفونة‬:‫المستعــــــــار‬ ‫السقف‬
Moldy: False Ceiling

‫عفونة‬:‫الحوائط‬Moldy: Walls

‫عفونة‬:‫الخـــــشبيات‬‫والخزائن‬
Moldy: Wooden- Cabinets

‫عفونة‬:‫الفراغات‬ ‫بين‬
Moldy: Intersection Gabs

‫عفونة‬:‫الباردة‬ ‫مياه‬ ‫أنابيب‬
Moldy: Chilled Water Pipes

‫أوجه‬‫عن‬ ‫تعبر‬ ‫متعددة‬‫الرطوبة‬
Various ways of expressing humidity
‫الرطوبة‬
Humidity

‫المحددة‬ ‫الرطوبة‬
Specific humidity
‫المحددة‬ ‫الرطوبة‬:‫الماء‬ ‫بخار‬ ‫جرامات‬ ‫عدد‬
‫الهواء‬ ‫من‬ ‫كيلوجرام‬ ‫كل‬ ‫فى‬.
‫الح‬ ‫تغير‬ ‫مهما‬ ‫تتغير‬ ‫ال‬ ‫المحددة‬ ‫الرطوبة‬‫يز‬
‫عندما‬ ‫الهواء‬ ‫كيلوجرام‬ ‫حجم‬ ‫يشغله‬ ‫الذى‬
‫حرارته‬ ‫درجة‬ ‫تتغير‬
Specific humidity ( g of
vapour/kg. of air)– measures
the water vapour content of the
air using mass of water for a
given mass of air.
Specific humidity doesn’t change
as the air parcel expands or is
compressed.
Specific Humidity:
actual quantity of
water held by a
parcel of air

‫المحددة‬ ‫الرطوبة‬
Specific humidity
‫المحددة‬ ‫الرطوبة‬ ‫عن‬ ‫عامة‬ ‫معلومات‬
‫يلي‬ ‫كما‬:
• Grams of water vapor per
kilogram of air (g/kg)
• Grain of water per Litter of
air (g/ltr)
• Highest in equatorial zones
• Lowest near poles

‫الخليط‬ ‫تشبع‬ ‫درجة‬
Saturation mixing ratio
Saturation mixing ratio - refers to
the mass of water vapour that can
held in a kilogram of dry air at
saturation. Saturation can be
generally defined as the condition
of liquid water or the deposition of
ice at a given temperature and
pressure.
‫الهواء‬ ‫حرارة‬ ‫درجة‬ ‫على‬ ‫تعتمد‬ ‫حملها‬ ‫للهواء‬ ‫يمكن‬ ‫التى‬ ‫القصوى‬ ‫الكمية‬
The maximum quantity of moisture that can be held in the air depends on air temperature

‫الرطوبة‬‫النسبية‬
Relative humidity
Relative humidity – the most
commonly used to measure
humidity.
It is the amount of water in the air
relative to the saturation amount
the air can hold at a given
temperature multiplied by 100.
‫الهواء‬ ‫حرارة‬ ‫درجة‬ ‫إرتفاع‬ ‫حالة‬ ‫فى‬ ‫منخفضة‬ ‫النسبية‬ ‫الرطوبة‬ ‫تبدو‬ ‫محددة‬ ‫رطوبة‬ ‫لمستوى‬,‫الهواء‬ ‫تبريد‬ ‫عند‬ ‫وتزداد‬
For Specific Humidity: RH% decreases when air is heated, while it will increase when cold

‫الرطوبة‬‫النسبية‬
Relative humidity
‫الرطوبة‬ ‫عن‬ ‫عامة‬ ‫معلومات‬‫النسبية‬
‫يلي‬ ‫كما‬:
• Relative Humidity: compares the
amount of water vapor present in
the air to the maximum amount
that the air can hold at that
temperature
• Expressed as a percentage:
• At 100% relative humidity, air is
saturated.
‫لنسبة‬ ‫النسبية‬ ‫الرطوبة‬ ‫لتصل‬ ‫تبريده‬ ‫يمكن‬ ‫الهواء‬ ‫فى‬ ‫المحددة‬ ‫المياه‬ ‫كمية‬ ‫لتقليل‬100%
To reduce the specific humidity (gr/kg.air) possible by cooling the air for RH% to reach 100%

‫النسبية‬ ‫الرطوبة‬
Relative humidity
‫بالتبريد‬‫لنسبة‬ ‫لتصل‬ ‫النسبية‬ ‫تزدادالرطوبة‬100%‫المحددة‬ ‫الرطوبة‬ ‫عندها‬ ‫لتقل‬ ‫المياه‬ ‫تكثف‬ ‫تبردأ‬ ‫عندها‬(‫المهندس‬ ‫هدف‬)
Cooling will increase RH% upto 100% then condensation happens to decrease specific humidity (gr/kg.air) –The Engineer Target.

‫النسبية‬ ‫الرطوبة‬ ‫لمعضلة‬ ‫التوضيح‬ ‫من‬ ‫مزيد‬
Understanding Relative humidity Dilemma
@ given Temp.

‫الراحة؟‬ ‫مستوى‬Comfort Level?
comfortable relative humidity
levels range between 30% and
60% RH ambient room air
temperature, while
temperature range: 22-27’C.
‫مستوى‬‫ال‬ ‫لمستوى‬ ‫المناسبة‬ ‫الرطوبة‬‫راحة‬
‫بين‬ ‫تقدر‬30%‫إلى‬60%‫درجات‬ ‫بين‬
‫حرارة‬22-27‫سيليزية‬ ‫درجة‬.

But RH% of Range (30% to 60%) will
ensure comfort if the DB-
Temperature was between 22’-27’C
27’
C
22’
C

‫الراحة‬ ‫مستويات‬ ‫فى‬ ‫تؤثر‬ ‫إضافية‬ ‫عوامل‬
Factors affecting Thermal Comfort
Condensing
Heating
Fresh Air
Filtration
RH%
Cooling
Air
Distribution
‫التكييف‬ ‫وظائف‬
A/C Functions
Noise
G.
Role
‫قاعدة‬
‫عامة‬

‫التحدى‬:‫التكثف؟‬ ‫نمنع‬ ‫كيف‬
The Challenge is: to prevent Condensation
G.
Role
‫قاعدة‬
‫عامة‬

‫بفهم‬ ‫المفتاح‬:‫التشبع‬ ‫نقطة‬
Key to understand: Dew Point
Dew point is the temperature to
which air must be cooled to
become saturated with water
vapor. When further cooled, the
airborne water vapor
will condense to form liquid water
(dew). When air cools to its dew
point through contact with a
surface that is colder than the air,
water will condense on the
surface. Dew point is sometimes
called frost point when the
temperature is below freezing.
The measurement of dew
point is related to humidity.
A higher dew point means
there will be more moisture
in the air.
G.
Role
‫قاعدة‬
‫عامة‬

‫لـ‬ ‫المفتاح‬:‫التكثف‬ ‫منع‬
Key to: Prevent Condensation
Prevent hot air from
blowing on cold surfaces.
Prevent cold air from
blowing on hot surfaces.
G.
Role
‫قاعدة‬
‫عامة‬

‫لـ‬ ‫المفتاح‬:‫التكثف‬ ‫منع‬
Key to: Prevent Condensation
The greater
the different
in
temperature
the more
likely to
condensate.
G.
Role
‫قاعدة‬
‫عامة‬

‫الرطوبة؟‬ ‫مستويات‬ ‫نقيس‬ ‫كيف‬
How to Measure Humidity?
Loggers

‫ل‬ ‫مصاحبة‬ ‫مشاكل‬‫منظومة‬‫المعتادة‬ ‫التكييف‬
Standard HVAC Sys.–Common Problems

‫يؤثر‬ ‫العازل‬Insulation Matter
ASHRAE STD 90.1-2010
FLUID
5’C
SURFACE
AMBIENT
25’C @
50%RH
INSULATION
1.5” 1”

FLUID
5’C
SURFACE
AMBIENT
30’C @
50%RH
INSULATION
1.5” 1”

FLUID
5’C
SURFACE
AMBIENT
25’C @
70%RH
INSULATION
1.5” 1”

FLUID
5’C
SURFACE
AMBIENT
25’C @
50%RH
INSULATION
1.5” 1/2”

‫العازل‬ ‫إختيار‬ ‫عند‬ ‫مليا‬ ‫التفكير‬ ‫يجب‬
Think Twice when selecting insulation
G.
Role
‫قاعدة‬
‫عامة‬

40
Control
Signal:
0-10 V DC
Flow: 1.5 gpm/TR
Pressure: 3 Bar
EWT: 6’C
LWT: 14’C
DT: 8’C
Temp.: 12.7’C
RH%:94.6%
DB: 12.2’C
W.: 8.6 g/kg
Dp: 11.9’C
Return
Air
Temp.: 23’C
RH%:55%
WB: 16.9’C
W.: 9.6 g/kg
Dp: 13.5’C
‫تعمل‬ ‫التكييف‬ ‫وحدة‬:‫للرطو‬ ‫تكثف‬ ‫ال‬‫بة‬
FCU Working: No Condensation

41
Control
Signal:
0-10 V DC
Flow: 1.5 gpm/TR
Pressure: 3 Bar
EWT: 6’C
LWT: 14’C
DT: 8’C
Temp.: 12.7’C
RH%:94.6%
DB: 12.2’C
W.: 8.6 g/kg
Dp: 11.9’C
Return
Air
Temp.: 23’C
RH%:55%
WB: 16.9’C
W.: 9.6 g/kg
Dp: 13.5’C
‫توقف‬‫المياه‬/‫الهواء‬ ‫تدفق‬:‫على‬ ‫تكثف‬‫الجريل‬
Water Stop/ Air Flow Blowing:
Condensation on grill

42
Control
Signal:
0-10 V DC
Flow: 1.5 gpm/TR
Pressure: 3 Bar
EWT: 6’C
LWT: 14’C
DT: 8’C
Return
Air
Temp.: 23’C
RH%:55%
WB: 16.9’C
W.: 9.6 g/kg
Dp: 13.5’C
‫الهواء‬ ‫توقف‬/‫المياه‬ ‫تدفق‬:‫األناب‬ ‫على‬ ‫تكثف‬‫يب‬
Air Flow Stop/Water Following:
Condensation on pipes

‫بالنداوة‬ ‫التحكم‬‫و‬‫إيقاف‬
‫يمنع‬ ‫الرطوبة‬ ‫تكثف‬
‫تكون‬‫العفونة‬
Moisture Control &
Stop Condensation
to Prevent Mold
Growth
G.
Role
‫قاعدة‬
‫عامة‬

44
EWT: 6’C
LWT: 14’C
DT: 8’C
Return
Air
Temp.: 23’C
RH%:55%
WB: 16.9’C
W.: 9.6 g/kg
Dp: 13.5’C
‫تجديد‬ ‫هواء‬‫دافئ‬:‫األسطح‬ ‫على‬ ‫تكثف‬‫الباردة‬
Warm FA: Condensation on Cold Surface
Fresh
Air Duct
25’C
60%RH
Dp:17’C

45
EWT: 6’C
LWT: 14’C
DT: 8’C
Return
Air
Temp.: 23’C
RH%:55%
WB: 16.9’C
W.: 9.6 g/kg
Dp: 13.5’C
‫بارد‬ ‫تجديد‬ ‫هواء‬:‫الدافئة‬ ‫األسطح‬ ‫على‬ ‫تكثف‬
Cold FA: Condensation on Warm Surface
Fresh
Air Duct
15’C
80%RH
Dp:12’C

‫الهواء‬ ‫تضخ‬ ‫ال‬
‫فوق‬ ‫المعالج‬ ‫الخارجى‬
‫المستعار‬ ‫السقف‬.
‫فق‬ ‫بارد‬ ‫أنه‬ ‫حالة‬ ‫فى‬‫د‬
‫دافئ‬ ‫سطح‬ ‫يالقى‬
‫فيتكثف‬.
‫فق‬ ‫دافئ‬ ‫أنه‬ ‫حالة‬ ‫فى‬‫د‬
‫بارد‬ ‫سطح‬ ‫يالقى‬
‫فيتكثف‬
Never pump
treated FA above
the ceiling.
If cooled and
touch hot service
it’ll condensate
If warm and touch
cold service it’ll
condensate.
G.
Role
‫قاعدة‬
‫عامة‬

‫التكييف‬ ‫منظومة‬‫المعتادة‬:‫منحفض‬ ‫ضغط‬ ‫تكون‬
Standard HVAC System: Create (-) Press.
DB=
115
46’C
WB=
85’F
29.5
RH%
30%
DP=
77’F
25’C
FCU
22’C
72’F
15’C
59’F

‫ضغط‬ ‫تكوين‬ ‫ضمان‬
‫داخل‬ ‫فى‬ ‫موجب‬
‫الهوا‬ ‫ومعالجة‬ ‫المبنى‬‫ء‬
‫بتنشيفه‬ ‫الخارجى‬‫عن‬
‫تجديد‬ ‫وحدة‬ ‫طريق‬
‫الهواء‬.
Ensure positive
pressure indoor
compare to
outdoor and
dehumidify fresh
air before blowing
G.
Role
‫قاعدة‬
‫عامة‬

‫تكون‬‫ضغط‬‫للد‬ ‫الخارجى‬ ‫الهواء‬ ‫يتسرب‬ ‫منحفض‬‫اخل‬
(-) Press.: Outdoor Air Infiltrate inside
DB=
115
46’C
WB=
85’F
29.5
RH%
30%
DP=
77’F
25’C
FCU
22’C
72’F
15’C
59’F
‫التكثف‬ ‫سيحدث‬
Condensation Will
Happen

‫مستوى‬ ‫تحقيق‬
‫الرطوب‬ ‫من‬ ‫مقبول‬‫ة‬
‫السه‬ ‫باألمر‬ ‫ليس‬‫ل‬,
‫أو‬ ‫إرتفاع‬ ‫ألن‬
‫مستوى‬ ‫إنخفاض‬
‫أن‬ ‫ممكن‬ ‫الرطوبة‬
‫مستوى‬ ‫من‬ ‫يقلل‬
‫حتى‬ ‫و‬ ‫الراحة‬
‫بأضرا‬ ‫التسبب‬‫ر‬
‫صحية‬
Achieving a
good level of
humidity is
ideal because
too little or
too much can
be
uncomfortable
and even
harmful.

‫األعراض‬ ‫معالجة‬
Symptomatic Solutions
•‫المتعفنة‬ ‫األماكن‬ ‫دهان‬
•‫الخشبيات‬ ‫استبدال‬
•‫العوازل‬ ‫تغير‬
•‫الديكو‬ ‫بالطات‬ ‫بديل‬‫ر‬
•‫تكي‬ ‫فتحات‬ ‫تنشيف‬‫يف‬
•‫كربو‬ ‫فالتر‬ ‫تركيب‬‫ن‬
•‫تكثثف‬ ‫جهاز‬ ‫تركيب‬
‫رطوبة‬
•‫قوة‬ ‫زيادة‬‫التبريد‬
• Repaint infected
walls
• Replace wooden
• Re-insulate
Duct/Pipe
• Dry A/C Grills
• Fix Carbon Filters
• Fix Dehumidifier
Increase Cooling
Capabilities

‫األعراض‬ ‫معالجة‬
Symptomatic Solutions

‫الجذرية‬ ‫الحلول‬ ‫مقابل‬ ‫األعراض‬ ‫معالجة‬
Real Solutions vs. Symptomatic
•‫مشاكل‬ ‫سبب‬ ‫تحديد‬
‫فى‬ ‫سيساعد‬ ‫العفونة‬
‫المشكل‬ ‫على‬ ‫القضاء‬‫ة‬
‫معالجة‬ ‫بيمنا‬ ‫نهائيا‬
‫توقف‬ ‫لن‬ ‫الظواهر‬
‫العفن‬ ‫الزحم‬.
•‫التنق‬ ‫و‬ ‫بالبحث‬ ‫إبدأ‬‫يب‬
‫الحقيقي‬ ‫األسباب‬ ‫عن‬‫ة‬
‫للعفون‬ ‫تتيح‬ ‫التى‬‫ة‬
‫و‬ ‫للنمو‬ ‫مناسبة‬ ‫أجواء‬
‫التكاثر؟؟؟‬
Identification of the
Root Causative
Factor usually
leads to permit
Solution.
Begin with
investigation to
determine the
source of
contamination &
reasons of
problem

General
Role
‫قاعدة‬
‫عامة‬
‫التـحــــــــــــــــــــــــــديات‬

22
60
%
‫المنشودة‬ ‫البرزدة‬ ‫درجة‬ ‫تخقيق‬ ‫من‬ ‫بالرغم‬ ‫مرتفع‬ ‫الرطوبة‬ ‫معدل‬
RH% Level is High, even desired Temp. is achieved

FCU
FAHU
DB=115-46’C
WB=85’F-29.5
RH%=30%
DP=77’F-25’C
22
DB=77-25’C
RH%=50%

22
80-85’F
Dew Point:
55-40’F
RH= 50%
FCU
FAHU
DB=115-46’C
WB=85’F-29.5
RH%=30%
DP=77’F-25’C

22
60
%

‫التجديد‬ ‫وحدة‬ ‫من‬ ‫وصلة‬ ‫مع‬ ‫الهواء‬ ‫تدوير‬ ‫وحدة‬
AHU with FA Branch from FAHU
‫تركيب‬
‫مثالى‬
Ideal

•‫احتواء‬
‫مصادر‬
‫تركز‬
‫الرطوبة‬
‫وشفطها‬
‫للخارج‬.
Contain
indoor
humidity
and
moisture-
generating
sources and
vent it to the
outside.
G.
Role
‫قاعدة‬
‫عامة‬

G.
Role
‫قاعدة‬
‫عامة‬
‫المروحة‬ ‫تشغيل‬ ‫ربط‬ ‫طريق‬ ‫عن‬
‫رطوبة‬ ‫بمجس‬
‫المروحة‬ ‫تشغيل‬ ‫ربط‬ ‫طريق‬ ‫عن‬
‫حركة‬ ‫بمجس‬
By connecting Fan to Humidity
Sensor
Or by connecting to Occupancy
Sensor
‫الحاجة‬ ‫عند‬ ‫شغل‬
Start when
needed

‫عدد‬ ‫زاد‬ ‫كلما‬
‫ملفات‬ ‫صفوف‬
‫زاد‬ ‫التبريد‬
‫الهواء‬ ‫إحتكاك‬
‫التبريد‬ ‫بأسطح‬
‫من‬ ‫يزيد‬ ‫مما‬
‫الرطوبة‬ ‫تكثف‬
More
Coils
Means
More
Condensat-
G.
Role
‫قاعدة‬
‫عامة‬

‫يستمرتكث‬ ‫أن‬ ‫يجب‬‫يف‬
‫لو‬ ‫حتى‬ ‫الرطوبة‬
‫لمزيد‬ ‫الحاجة‬ ‫توقفت‬
‫التبريد‬ ‫من‬
Since
dehumidification is
continues process
that stop when
thermostat reach
desire temp. for that
we have to avoid
over design &
selection to
maximize cooling
process.
G.
Role
‫قاعدة‬
‫عامة‬

‫غالبية‬ ‫وأن‬ ‫خاصة‬
‫ال‬ ‫تفوق‬ ‫المكيفات‬‫سعة‬
‫آنيا‬ ‫المطلوبة‬
Since A/C unit
selection is usually
larger than design
that was calculated
peak load.
For that we must
utilize the control to
perform according to
actual demand to
extend cooling
process and continue
the dehumidification.
G.
Role
‫قاعدة‬
‫عامة‬

‫الثرموستات‬ ‫نوعي‬ ‫مواصفات‬ ‫مقارنة‬
Features Comparison both Thermostats
• Analog Set Temp
• No Room Temp
• Manual Fan Speed
• Digital Set Temp
• Room Temp
• Auto Fan Speed
Control

In case of Analog
Thermostat: user doesn't
have the room temp as a
reference to wisely select
the comfort temperature
In case of Digital
Thermostat: user can
remember his suitable
room temperature every
time & control it any time.

‫الديجيتال‬ ‫أجــــواء‬ ‫منظــــم‬
Digital Climate Thermostat
‫الداخليـــة‬ ‫الرطوبــة‬ ‫مستوي‬ ‫لتقليل‬
To control Internal Humidity Level
22

‫الديجيتال‬ ‫أجــــواء‬ ‫منظــــم‬
Digital Climate Thermostat
This is done by:
The indoor fan speed will be
adjusted automatically
according to the
difference between the
room & the setting
temperatures DT:
•‫طريق‬ ‫عن‬::
•‫المروحة‬ ‫سرعة‬ ‫تبديل‬
‫بن‬ ‫أوتوماتيكيا‬ ‫الداخلية‬‫اءا‬
‫درجة‬ ‫بين‬ ‫الفرق‬ ‫علي‬
‫وحرارة‬ ‫المنظم‬ ‫ضبط‬
‫الغرفة‬
Fan Speed DT ‫المروحة‬ ‫سرعة‬
High >= 3 ‫عالية‬
Medium >= 2 ‫متوسطة‬
Low >= 1 ‫منخفضة‬
Off < 1 ‫صفر‬

• ‫عادى‬ ‫ثرموستات‬
• Ordinary Thermostat
• ‫أجــــواء‬ ‫منظــــم‬‫الديجيتال‬
Digital Climate
Thermostat

‫الهواء‬ ‫تجديد‬ ‫وحدات‬
FAHU: Fresh Air Handling Units

‫الهواء‬ ‫تجديد‬ ‫وحدة‬:‫الرئيسية‬ ‫التحكم‬ ‫لوحة‬
FAHU: Central Controller Panel
‫الحال‬ ‫يظهر‬ ‫وفيها‬ ‫الرئيسية‬ ‫التحكم‬ ‫لوحة‬‫ة‬
‫المتصلة‬ ‫األجهزة‬ ‫لكافة‬ ‫التشغيلية‬‫بوحد‬‫ة‬
‫الهواء‬ ‫تجديد‬,‫التشغيل‬ ‫ومفاتييح‬.
• Central Control Panel that
consists all related controllers
and relays of FAHU, also
displays, indicator lamps and
selector switches.

‫التحكم‬ ‫منظومة‬ ‫ملحقات‬:‫ومفاتيح‬ ‫مجسات‬
Central Controller: Sensors & Switches

G.
Role
‫قاعدة‬
‫عامة‬

‫وقائية‬ ‫خطوات‬Preventive Measures -
•‫لمنع‬ ‫الشقوق‬ ‫إغالق‬ ‫أحكم‬
‫الخارجى‬ ‫الهواء‬ ‫تخلل‬.
•‫الوحدات‬ ‫تعقيم‬ ‫و‬ ‫تنظيف‬
‫الداخلية‬.
•‫و‬ ‫فعالية‬ ‫أكثر‬ ‫فالتر‬ ‫ركب‬
‫نظافتها‬ ‫على‬ ‫حافظ‬.
•‫م‬ ‫وتأكد‬ ‫الشفط‬ ‫مراوج‬ ‫أصلح‬‫ن‬
‫المسحوب‬ ‫الهواء‬ ‫كمية‬
•‫الهواء‬ ‫بكمية‬ ‫قارن‬‫المجدد‬
• Sealed return plenum
from outdoors.
• Cleaned & sanitized
coil & AHU.
• Installed efficient
filters and keep it
clean.
• Repaired exhaust fan
& test quantity.
• Compare to Fresh Air
intake quantity.

‫ال‬‫تبريد‬‫هذه‬ ‫بعد‬ ‫مضمون‬‫التعديالت‬..‫للمال‬ ‫هدر‬ ‫بدون‬/‫الطاقة‬
Cooling is Guarantee After these Corrections ..
Without Money/Energy Wastage

Thank you! Looking forward to serve-U better
Eng. Juma Yousef Juma
CEO & Business Development Manager,
Getco Green Earth Technology Co. & Al-
Sadarah Engg.
Follow us for the latest news and information on
Solutions of HVAC Challenges.
jumayjuma@gmail.com
https://www.facebook.com/greenearthtechnologycompany/
https://www.facebook.com/groups/780970768708352/
www.alsadarah.net
https://www.linkedin.com/in/juma-yousef-j-saleh-
%D8%AC%D9%85%D8%B9%D8%A9-%D9%8A%D9%88%D8%B3%D9%81-
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All about humidity and comfort by eng. juma yousef juma getco

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