The document proposes passive design strategies to improve thermal comfort in a master bedroom. It analyzes sun exposure, wind patterns, and internal and external temperatures. It finds the room gets direct sunlight in the morning, afternoon, and evening. The wind is from the northeast but hot air gets trapped on the site. Internal temperatures increase, especially in the evenings. It recommends maximizing ventilation and minimizing heat gain through insulated walls with tinted, insulated glass doors and windows to control solar heat gain and glare while maintaining visibility and acoustic performance.

1. PROPOSING PASSIVE DESIGN STRATEGIES.
Sun Analysis
Due to the lack of cross ventilation in
the space, air is trapped in the room
increasing its temperature and
humidity, affecting the thermal
comfort of the user in the space.
10 am
The room is not exposed
to sun due to the other
bedroom and the
opposite house aback.
2pm
The room is exposed to
direct sunlight and heat is
transferred through the roof
and into the space.
6pm
The room is exposed to the
direct evening sun which
penetrates through the glass
sliding doors and windows.
The space selected was the
master bedroom on the 2nd
floor due to its relatively high
temperature, humidity, and its
poor thermal comfort.
The wind direction is mostly from
north east. Due to the site bordering
the SILK highway, unwanted
compressed hot air is caught on the
site.
The selected site is a double story semi-detached house
located in Twin Palms, Sungai Long, Kajang, orientated in
a way that the longitudinal section faces the north.
Wind Analysis
Thermal Analysis
Introduction
The sun path refers to the apparent significant
seasonal-and-hourly positional changes of the sun as
the Earth rotates, and orbits around the sun.
The facades
faces south
east within the
dense
landscape of
the
surrounding
hills, with the
SILK highway
on its west.
External Temperature
Internal Temperature
CHEW JIA CHEN 0322852 | FOONG LIH WEY 0322687 | LIEW JIN 0318449 | PABLO IDRIS MENDEZ CUEVAS 0321895 | TANG ZE ZHENG 0318967 | YONG YU JOON 0318229
12 PM 2PM 6PM
The external
temperature
rapidly
increased in the
morning and has
a major drop
during the
evenings
The internal
temperature
increases
especially during
the evening.

2. Passive Design Strategies
Calculations
In this humid climate, it is necessary to maximize cooling through ventilation and minimize building heat
gain.
Studio Materials Thickness R- Value U- Value
Wall
Brick with plastered
both sides 280mm 0.41 2.44
Glass Sliding Door Tinted Insulated Glass 8mm 2.22 0.45
Conduction Heat Gain or Loss (Qc)
area u-value ~T total
Roof 36 0.9 8.92 289
West Wall (Exposed) 5.25 2.44 9.84 126.05
North Wall (Exposed) 10.5 2.44 6.35 162.69
East Wall (Sheltered) 9.3 2.44 4 90.77
South Wall (Sheltered) 9.6 2.44 4 93.7
Glass Sliding Door 5.25 0.45 32.8 77.5
Wooden Door 1 1.3 2.17 4 11.28
Wooden Door 2 1.3 2.17 4 11.28
sub total 862.27
Solar Heat Gain (Qs)
area I delta total
Window ( west) 0.52 620 0.25 80.6
Window ( north) 0.38 400 0.25 38
sub total 118.6
Ventilation Heat Gain (Qv) Column1 Column2 Column3
volumetric of air v ~T total
1300 0.06 4 138.84
Efficiency Of Bulb
LED 50%
Internal Heat Gain (Qi)
Amount Watts Total Watts
Total ( After light
effieciency)
Lighthing (LED) 4 15 60 30
People 2 150 300 300
sub total 330
Total Heat Gain 1449.71
Insulated Wall
Tinted Insulated Glass
Durability
It is lightweight. Therefore, a chemical reaction occurs when the
water escapes the plaster mixture and this is what makes the
plastered walls stronger.
Glare Control
i) impacts visible light transmittance
by allowing just the right amount of
natural light into a building
ii) reduces glare and the need for
shading devices.
iii) reflects a portion of incoming solar
radiation, which limits heat
penetration into the building.
Color
Tinted insulated glasses offer better harmonization ,enriching
glass transmit generous levels of visible light and offers color
neutrality, which also enhances the tint of the glass substrate
underneath the reflective coating.
Noise Absorbant
The brick wall plastered on both sides has the
ability to absorb noise, which acts as an acoustic
and sound absorber.
Thermal Comfort
-Low thermal conductivity
-Good heat insulator
Visibility
Tinted insulated glass has a coating
that makes it possible to see out,
while preventing people from seeing
in, in order to preserve privacy during
the day.
Tutor : AR Edwin Chan
Subject : Building Science I
203mm × 92mm × 57 mm
red brick
cement
plasterboard