Buildings are designed for people, and those people are trying to accomplish a task – whether it’s raising a family, running an office, or manufacturing a product. The building needs to keep people comfortable, efficient, healthy, and safe as they set about their task.

1. Module
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Presented by: Eng. Juma Yousef Juma

2. Balancing Human Comfort & Energy
Management
‫ال‬ ‫إدارة‬ ‫و‬ ‫الناس‬ ‫راحة‬ ‫بين‬ ‫التوازن‬ ‫لتحقيق‬ ‫الضمان‬‫طاقة‬

3. Buildings are designed for
people, and those people are
trying to accomplish a task –
whether it’s raising a family,
running an office, or
manufacturing a product.
The building needs to keep
people comfortable, efficient,
healthy, and safe as they set
about their task.
Balancing Human Comfort & Energy
Management
‫الطاقة‬ ‫إدارة‬ ‫و‬ ‫الناس‬ ‫راحة‬ ‫بين‬ ‫التوازن‬ ‫لتحقيق‬ ‫الضمان‬

4. Green design seeks to
create efficient buildings
that keep people
comfortable while
minimizing negative
environmental impacts.

5. ‫الحرارية‬ ‫الراحة‬ ‫منطقة‬
Thermal Comfort
Maintaining a person’s
thermal comfort means
ensuring that they don’t’
feel too hot or too cold.
This means keeping the
temperature, humidity,
airflow and radiant
sources within
acceptable range.

6. ‫األهمية؟‬ ‫وجه‬ ‫ما‬
Why it’s
important?
‫المقاييس‬
Metrics
To keep people comfortable
you need to provide the right
mixture of temperature,
humidity, air speed (and
covering area), also
cleanness of air.
The right level of these
variables depends on what
activity is occurring, how
active the people are, and
what they are wearing.
Everyone has slightly
different criteria for comfort,
so comfort is often measured
by the percentage of
occupants who report they’re
satisfied with the conditions.
‫التصم‬ ‫إستراتيجية‬‫يم‬
Design
Strategies
Creating comfortable
conditions is one of
the biggest uses of
energy in buildings
and it is also critical
to the happiness &
productivity of its
users. Often factors
such as airflow &
radiant temp. are
overlooked in a
design, leading to
higher energy use
and occupancy
dissatisfaction.
Some ways to keep
people comfortable are
to use the HVAC
equipment like chillers,
DX, PKG, and heat
exchangers can temper
the air temperature and
humidity, but surface
temperatures and
moving air have to be
considered too by
utilizing AHU & FCU,
and keeping surrounding
surfaces the correct
temperature with good
insulation.

7. Comfort Zone ‫الراحة‬ ‫منطقة‬

8. ‫الراحة‬ ‫مقاييس‬
Comfort
Metrics

9. ‫الراحة‬ ‫مقاييس‬–Comfort Metrics

10. ‫البصرية‬ ‫الراحة‬ ‫منطقة‬
Visual Comfort
Maintaining visual comfort
means ensuring that
people have enough light
for their activities, the light
has the right quality and
balance, and people have
good views.

11. ‫األهمية؟‬ ‫وجه‬ ‫ما‬
Why it’s
important?
‫المقاييس‬
Metrics
Good lighting is
well-distributed, is
not too dim or too
strong, and uses
minimal energy.
Good visual
comfort generally
means that as
much of this light
is natural light as
possible. Humans
are hard-wired to
like the sun’s light
and it saves
energy.
‫التصميم‬ ‫إستراتيجية‬
Design Strategies
Good lighting
helps create a
happy and
productive
environment.
Natural light does
this much better
than electric
lighting. Having
good views and
sight-lines gives
people a sense of
control of their
environment and
provides a sense
of well-being.
Day-lighting design strategies
like high or clerestory windows,
light shelves, and well-placed
skylights can help distribute
sunlight inside a space. When
you do need to use artificial
lights, you can reduce energy
use by using efficient
fluorescents or LEDs, with day-
lighting dimming controls,
effective fixtures, and good
lighting design. Good controls
can automatically balance
natural and artificial lighting.
Most lights should have
occupancy sensors.

12. Natural Light–‫الطبيعية‬ ‫اإلضاءة‬

13. 4 2
‫خيارت‬
‫متعددة‬
More
Options

14. ‫الداخلي‬ ‫الهواء‬ ‫جودة‬
Air Quality
In addition to air that’s the
right temperature and
humidity for thermal comfort,
it’s important that air is
clean, fresh, and circulated
effectively in the space.

15. ‫األهمية؟‬ ‫وجه‬ ‫ما‬
Why it’s
important?
‫المقاييس‬
Metrics
Fresh air
requires a
certain
percentage of
outside air
circulating into
spaces. Clean
air requires
pollutant and
pathogen levels
to be below
certain
thresholds.
‫التصميم‬ ‫إستراتيجية‬
Design Strategies
If air is too stale
or is polluted, it
can make
people
uncomfortable,
unproductive,
unhappy, and
sick. Fresh air
helps people be
alert, productive,
healthy, and
happy.
Air can be kept fresh with
high ventilation rates, either
using natural ventilation such
as operable windows, or
active systems such as
HVAC fans and ducts. Clean
air can be achieved by
filtering air, by flushing
spaces with fresh outside air,
and by not contaminating the
air with impurities from the
building, such as volatile
organic compounds from
paints or materials.

17. ‫الصوتية‬ ‫الراحة‬ ‫منطقة‬
Acoustic Comfort
Acoustic comfort
means having the
right level and quality
of noise to use the
space as intended.

18. ‫األهمية؟‬ ‫وجه‬ ‫ما‬
Why it’s
important?
‫المقاييس‬
Metrics
How humans perceive
sounds and loudness is
a subjective measure.
However, you can
create a comfortable
environment by
controlling objective
measures like decibel
level (sound pressure),
reverberation time, and
the sound reflection and
damping properties of
materials.
‫التصميم‬ ‫إستراتيجية‬
Design
Strategies
People are more
productive & happy
when they’re not
distracted by
noises from outside
or from surrounding
spaces and
occupants.
Acoustic comfort is
especially
important for
schools& office BLD.
Creating barriers
and sound breaks
between sources of
noise is important.
You can optimize
room shape & size
to reduce echoes &
reverberation. And
you can use
acoustic tiles on
ceilings & walls to
dampen sound.

19. ‫الصوت‬ ‫عازل‬ ‫تركيب‬ ‫قبل‬
Before Acoustic Insulation
‫الصوت‬ ‫عازل‬ ‫تركيب‬ ‫بعد‬
After Acoustic
Insulation

20. Prevent
Condensing
Heating
Fresh Air
Filtration
Relative
Humidity
Cooling
Air
Distribution
‫التكييف‬ ‫وظائف‬
A/C Functions
Noise
‫الخالصـــــــة‬:Conclusion:

21. ‫إذن‬:
‫يعني‬ ‫التكييف‬ ‫أن‬ ‫نستنتج‬
‫أنواع‬ ‫بين‬ ‫التوازن‬ ‫إحداث‬
‫المختلفة‬ ‫الراحة‬
So: We conclude that
Air Conditioning is
the balance of all
theses types of types
of comfort

22. By Eng. Juma Yousef Juma
jumayjuma@gmail.com +971-50-4948385