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

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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.

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 WattsTotal ( 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 ChanSubject : Building Science I

203mm × 92mm × 57 mm red brick

cementplasterboard