building services, introduction to passive design,

1. PASSIVE DESIGN
system in building

3. Passive Design
• ‘Passive design’ is design that works with the
environment to exclude unwanted heat or cold and
take advantage of sun and breezes, therefore avoiding
or minimising the need for mechanical heating or
cooling.
• Passive design in the tropics means designing a
building to make the most of natural light and cooling
breezes, and using shading, orientation and
appropriate building materials to reduce heat gain
and storage.
• The use of passive design principles in the tropics
results in a building that is comfortable, energy
efficient and results in substantial savings in running
costs of both cooling and lighting.

4. MAIN PRINCIPLES OF PASSIVE
DESIGN
Energy and emissions
Water and wastewater
Indoor environment quality
Waste and construction
materials
Local environment

5. • Lighting and Electrical
• Water Supply
• Waste management systems
• HVAC
• Access and Security
• Fire Prevention, control and safety
• Mechanical Transport
• Communication

7. NOISE CONTROL AND
ACOUSTICS

8. NOISE CONTROL
• set of strategies to
reduce noise
pollution or to
reduce the impact
of noise, whether
outdoors or
indoors.
• The main areas of
noise mitigation
are
machines
transportation systems
Air craft
trains
motor vehicles

9. Noise Criteria In Buildings
Room Criteria (RC)
Noise Criteria (NC)
The Speech
Interference Level (SIL)

10. ROOM CRITERIA (background noise in a
building over the frequency range 16 Hz to
4000 Hz)

11. ROOM CRITERIA cont….

12. NOISE CRITERIA
• Noise Criterion - NC - were established in U.S.
for rating indoor noise, noise from air-
conditioning equipment etc.
• The method consists of a set of criteria curves
extending from 63 to 8000 Hz, and a tangency
rating procedure

13. NOISE CRITERIA cont….

14. NOISE CRITERIA cont….

15. Speech Interference Level (SIL)
• Speech Interference Level (SIL) is an
acoustical parameter calculated from sound
pressure levels measured in octave bands.
• sound pressure levels in three or four octave
bands in the 500 Hz - 4 kHz frequency range

16. sound
vibration

17. Sound
•A disturbance in an elastic medium resulting
in an audible sensation. Noise is by definition
“unwanted sound”.

18. Vibration
• A disturbance in a solid elastic medium
which may produce a detectable motion

19. UNITS OF ACOUSTICS
• The basic unit of level in acoustics is the
“decibel” (abbreviated dB). In acoustics, the
term “level” is used to designated that the
quantity is referred to some reference value,
which is either stated or implied.