Building Science 2 [BLD 61303]
Project 2: Integration Project Calculation Report
Tutor
:
Ar. Edwin Yean
Name
:
Lai Sze Chun
ID
:
0313797
Submission Date
:
11 July 2016
1|P age
Lighting Calculation Location
Cafe
Area, m
28 sqm
Height Of Room, m
2.8 m
Distance From Working Plan to 1.6 m Illuminance, m Standard Illuminance, Lux
Restaurant: 200 Lux
Reflection Factors
Wall: 0.50 Ceiling: 0.50
Utilization Factor, UF
0.46
Maintenance Factor, MF
0.80
Type of Light No. Of Light Fixture
NVC Triphosphor Fluorescent Bulb ?
Room Index ��
đ?‘šđ?‘° = đ?‘Żđ?’Ž (đ?‘ł+đ?‘ž) đ?&#x;?đ?&#x;–.đ?&#x;Žđ?&#x;”
= đ?&#x;?.đ?&#x;”(đ?&#x;’.đ?&#x;‘đ?&#x;“+đ?&#x;”.đ?&#x;’đ?&#x;“) = đ?&#x;?. đ?&#x;”đ?&#x;? Number Of Light Required đ??¸Ă—đ??´
đ?‘ = đ??šĂ—đ?‘ˆđ??šĂ—đ?‘€đ??š 200Ă—28.06
= 2500Ă—0.46Ă—0.8
2|P age
= 6.1 =7
= 7 light required Maximum
Horizontal
Spacing S max = 1.5 x Hm
Between Fitting = 1.5 Ă— 1.6 = 2.4 đ?‘š
3|P age
Light Bulb Used Wiselite T3 Half Spiral Type Compact Fluorescent Lamps - [ESL/MH-15W]
Half Spiral Compact Fluorescent Lamps
Type of Light
Artificial Light
Type(s) of fixtures
Pendant Light
Type of luminaries
Warm white light
Power (W)
15
Voltage (v)
180-260
Luminous Flux (lm)
2500
Colour temperature (K)
2700
Colour rendering index (Ra)
80
Average lifetime (hrs)
8000
Lumen maintenance 2000h (%)
85
4|P age
NVC Triphosphor T5 Fluorescent Tube-HE [YZ28-T5/HE]
Fixture: Hanging Light
NVC Triphosphor Fluorescent Bulb Type of Light
Artificial Light
Type(s) of fixtures
Hanging light
Type of luminaries
Warm light
Power (W)
28
Luminous Flux (lm)
2500
Colour temperature (K)
2700
Colour rendering index (Ra)
82
Average lifetime (hrs)
10000
5|P age
Acoustic Calculation Sound reduction index Sound reduction index is used to measure the level of sound insulation provided by a structure such as a wall, window, door, or ventilator.
Sound reduction index formula: đ?‘ž
đ??’đ??‘đ??ˆ = đ?&#x;?đ?&#x;Ž đ??Ľđ??¨đ?? (đ?‘žđ?’Š ) dB đ?’•
Where, SRI= Sound Reduction Index (dB) Wi = Sound power incident on one side of a sound barrier (W) Wt= Sound power transmitted into the air on the side of the partition (W)
6|P age
Example on Calculation (Sound Reduction Index):
SRI = 10 log10
1 �
For door: 28 = 10 log10
1 � 1
Antilog 2.8 = � 1
T = 6.31 Ă— 102 đ?‘‡đ?‘‘đ?‘œđ?‘œđ?‘&#x; = 1.585 Ă— 10−3
For window : 26 = 10 log10
1 �
đ?‘‡đ?‘¤đ?‘–đ?‘›đ?‘‘đ?‘œđ?‘¤ = 2.512 Ă— 10−3
For wall: 1
42 = 10 log10 đ?‘‡ đ?‘‡đ?‘¤đ?‘Žđ?‘™đ?‘™ = 6.310 Ă— 10−5
đ?‘‡đ?‘œđ?‘Łđ?‘’đ?‘&#x;đ?‘Žđ?‘™đ?‘™ =
(2 Ă— 1.585 Ă— 10−3 )+(2.4 Ă— 2.512 Ă— 10−3 )+(15.6 Ă— 6.31 Ă— 10−5) 2 + 2.4 + 15.6
= 5.087 Ă— 10−4
1
đ?‘†đ?‘…đ??źđ?‘œđ?‘Łđ?‘’đ?‘&#x;đ?‘Žđ?‘™đ?‘™ = 10 log 5.087 Ă— 10−4 = 10 log 1.958 Ă— 103 = 32.9 dB
7|P age
All the formulas was typed into Microsoft Excel and the result are shown below.
8|P age
Reverberation Reverberation, in terms of psychoacoustics, is the interpretation of the persistence of sound after a sound is produced. Reverberation is frequency dependent.
Reverberation Time Formula: đ??“ =
đ?&#x;Ž. đ?&#x;?đ?&#x;”đ?&#x;?đ?‘˝ đ?‘¨
Where, T is the reverberation time in seconds V is the room volume in m3 A is the absorption coefficient
Example on Calculation (Reverberation Time):
Total room absorption = A = �1 �1 + �2 �2 + �3 �3 + �4 �4 ‌‌. Where, S is the surface area of material in m2 a is the absorption coefficient
đ??‘đ??“ =
đ?&#x;Ž. đ?&#x;?đ?&#x;”đ?‘˝ đ?‘¨
Where, T is the reverberation time in seconds V is the room volume in m3 A is the absorption coefficient
đ??“ =
đ?&#x;Ž. đ?&#x;?đ?&#x;”(đ?&#x;?đ?&#x;•đ?&#x;?đ?&#x;–) đ?&#x;?đ?&#x;”đ?&#x;Ž(đ?&#x;Ž. đ?&#x;?đ?&#x;“) + đ?&#x;?đ?&#x;”đ?&#x;Ž(đ?&#x;Ž. đ?&#x;Žđ?&#x;?) + đ?&#x;?đ?&#x;Žđ?&#x;’(đ?&#x;Ž. đ?&#x;Žđ?&#x;?) + đ?&#x;?đ?&#x;Žđ?&#x;Ž(đ?&#x;Ž. đ?&#x;’đ?&#x;”)
đ??‘đ??“ = đ?&#x;?. đ?&#x;—đ?&#x;”đ??Ź 9|P age
All the formulas was typed into Microsoft Excel and the result are shown below.
10 | P a g e