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DAYLIGHTING

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anees adilla

on 1 September 2013

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Transcript of DAYLIGHTING

LIGHTING PERFOMANCE
design by Dóri Sirály for Prezi
NAME OF MEMBERS:
NURUL AMIRAH BT NORZLI
NOR ADILLA BT NOR HASHIMI
SITI FATIMAH BT BASIT
SYAZLYN BT SHAMSURIJA
ANEES ADILLA BT CHE MOHD HASHIM
INTRODUCTION
What is lighting?
There are many different types of lighting, all lights have a lamp, which is commonly referred to as a light bulb. The lamp is connected to the energy source by something called a fixture, which also positions the light in a useful way. In fluorescent and high-intensity-discharge (HID) fixtures, the energy supply must be modulated through a ballast. Taken together, the lamp, fixture, and any necessary ballast are sometimes called luminaire.


SOURCE OF LIGHT

Natural light
Artificial light

Why daylight ?

order to begin considering the inclusion of daylight in a building, a designer must have one or more compelling reasons for doing so. Most often daylight is used either a primary or secondary interior illuminant. But even if it is used only to provide a particular design effect, the design must the impact of the light on all aspects of the building and its occupants. Many reasons can justify considering daylight as a light source in both residential and commercial buildings:
i.Quality of the light
ii.Importance of the daylight as a design element
iii.View (daylight apertures provide visual communication channels to the outside)
iv.Use daylight apertures as a fire exists in emergencies



Natural lighting
main source of natural light is the sun. The sun is a star that is a huge ball of gas. Explosions at the centre of the sun produce large amounts of energy. This energy is released as light and heat.Some of this light reaches Earth and gives us daylight. The light that comes from the sun is known as white light.natural light include the moon and the stars. The stars provide only small amounts of light at night as they are billions of kilometres away from Earth. A full moon, however, can provide quite a lot of light. The light from the moon is just light reflected from the sun.
NATURAL LIGHTING DIRECTLY REFLECT INTO THE ROOM
NATURAL LIGHT
Artificial light
DAYLIGHT
Artificial lighting which is man made, such as fluorescent, tungsten, mercury vapor, sodium vapor, halogen, compact fluorescent. It can be turned on and off at a flick of a switch. Humans have been able to create and control light for thousands of years. The earliest form of lighting was with fire such as burning wood, candles, gas or oil. There are also very special types of artificial light for specific purposes, such as infared heat lamps, ultraviolet lights for plant growth and tanning. In photography, different light sources have a different colour temperature which can be compensated for with special filters or simulated with special lighting.
ARTIFICIAL LIGHT GIVE BRIGHT TO THE BUILDING IN THE NIGHT
a) Why daylight ?
b) The Daylight Design Process.
c) Daylight Issues

B)The Daylight Design Process.
The designer must incorporate daylight into the building design process, establishing at what points during the building design process decision about the proposed daylight concepts or system will require evaluation.
Many architects and engineers follow a building design process that includes the following five steps:

i.Schematic or conceptual design
ii.Design development or final design
iii.Bidding
iv.Construction


daylight issue
i.The need for a daylight and sunlight availability data base for analyzing lighting and energy performance characteristics of the system and building.
ii.The need for systematic method of describing day lighting concepts.
iii.Energy consumption and peak demand cost savings resulting from the use of daylight.
iv.No cost change in construction.
v.Opportunity to developed integrated structural and mechanical systems.
vi.Psychological and physiological benefits not obtainable electric lighting or windowless buildings
vii.The genuine desire to have natural light and sunlight in a room or space.

RESULT
Factors Affecting The Distribution of Natural Lighting
a) Building Area and Orientation
b) Window Area and Position
c) Glass Type
d) Shading
e) External Obstruction
a) Building Area and Orientation
i. If the depth of the room from window to back wall is too long comparing with the room width and height, then rear half of ands the room to look shadowy compared to the brightly-lit front half and supplement electric lighting will be required for most of daytime.

b) Window Area and Position
i.High window placement can be used to project light deep into rooms.
ii.Wide windows openings caan provide greater depth of daylight peneration than narrow openings.
position of window and angle of window
c) glass type
i)clear glass
ii) tinted glass
iii)reflective glass
iv)low-e glass


d) Shading
i. Shading devices shade the window from direct sun peneration but allow diffuse daylight to be admitted.
ii. Exterior shading divides frequently found in Malaysia for office buildings include overhangs and side-fins which are more effective to block the direct sunlight and solar heat.
external obstruction
i.External obstruction influences the daylighting performance in two aspect:
ii.First is the amount of the sky being obstructed or unobstructed.
iii.Second is the colour of the external surface finish that can be regarded as the reflected luminance from the obstructing buildings.

Thank you from us...
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