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1.0 – Internal lighting ‫الداخلية‬ ‫االضــــاءة‬
1.1–Calculation of luminaries ‫الكشافات‬ ‫حسابات‬
‫األرضية‬ ‫فراغ‬
‫الحجرة‬ ‫فراغ‬
‫السقف‬ ‫فراغ‬
Room Index (R.I ) = (L X W)
hrc (L + W)
- From above e equations, and table of luminaries we determine the utilization
factor according To the reflection of (ceiling, wall, floor)
- Nominal illuminance of interiors working premises acc. to table no. (1 )
-
‫االستخدام‬ ‫معامل‬ ‫تحديد‬ ‫يتم‬
(
UF
(
‫النعكاس‬ ‫طبقا‬ ‫وذلك‬ ‫بالكشافات‬ ‫الخاصة‬ ‫والجداول‬ ‫عاليه‬ ‫المعادالت‬ ‫من‬
‫واألرضية‬ ‫والحوائط‬ ‫السقف‬ ‫من‬ ‫الضوء‬
.
-
‫االضاءة‬ ‫شدة‬ ‫تحديد‬ ‫يتم‬
E )
(
‫رقم‬ ‫للجداول‬ ‫طبقا‬ ‫الداخلية‬ ‫لألماكن‬ ‫المستخدمة‬
(
1
)
‫المرفقة‬
Formula for calculation the a number of luminaries required
‫المطلوبة‬ ‫الكشافات‬ ‫عدد‬ ‫بحسابات‬ ‫الخاصة‬ ‫المعادلة‬
N = E x A .
n x Ø x UF x MF
Where :
N : number of luminaries ‫الكشافات‬ ‫عدد‬
E : nominal illuminance level (lux) ‫شدة‬ ‫مستوى‬
‫االضاءة‬
A : lighting area ‫اضائتها‬ ‫المراد‬ ‫المساحة‬
n : number of lamp / luminaire ‫الكشاف‬ ‫لمبات‬ ‫عدد‬
Ø : nominal luminous flux of lamp ‫لمبة‬ ‫لكل‬ ‫الضوئى‬ ‫الفيض‬
UF: coefficient of utilization ‫اإلستخدام‬ ‫معامل‬
MF: maintenance factor ‫الصيانة‬ ‫معامل‬
‫الغرف‬ ‫تصنيف‬ ‫معامل‬
‫ة‬
Nominal luminous flux of lamp, utilization factor, can be found in luminaire
manufacturers lists
‫َع‬‫ن‬‫المص‬ ‫لبيانات‬ ‫طبقا‬ ‫تحديدهما‬ ‫يتم‬ ‫االستخدام‬ ‫ومعامل‬ ‫لمبة‬ ‫لكل‬ ‫الضوئى‬ ‫الفيض‬ ‫شكل‬
‫ملحوظة‬
‫استرشادية‬ ‫جداول‬ ‫مرفق‬
‫رقم‬
(
2,3
)
‫األستخدام‬ ‫معامل‬ ‫آليجاد‬ ‫استخدامها‬ ‫يمكن‬
‫الحصول‬ ‫امكانية‬ ‫عدم‬ ‫حالة‬ ‫فى‬
‫على‬
‫لتحديدة‬ ‫الآلزم‬
.
(Room Index)
‫الغرفة‬ ‫تصنيف‬ ‫لمعامل‬ ‫طبقا‬ ‫وذلك‬ ‫الكتالوجات‬
Room
Room index
Reflectance's
C W F 0.75 1 1.25 1.5 2 2.5 3 4 5
0.5 NA 0.48 0.52 0.56 0.6 0.62 0.64 0.66 0.68
0.7 0.3 0.2 NA 0.44 0.49 0.52 0.56 0.59 0.61 0.64 0.66
0.1 NA 0.41 0.46 0.49 0.54 0.57 0.59 0.62 0.64
0.5 NA 0.47 0.51 0.54 0.58 0.6 0.62 0.64 0.65
0.5 0.3 0.2 NA 0.44 0.48 0.51 0.55 0.58 0.6 0.62 0.64
0.1 NA 0.41 0.45 0.48 0.53 0.56 0.58 0.61 0.62
0.5 NA 0.46 0.5 0.52 0.56 0.58 0.6 0.61 0.63
0.3 0.3 0.2 NA 0.43 0.47 0.5 0.54 0.56 0.58 0.6 0.61
0.1 NA 0.41 0.45 0.48 0.52 0.54 0.56 0.59 0.6
0 0 0 NA 0.39 0.43 0.46 0.5 0.52 0.54 0.56 0.58
‫رقم‬ ‫جدول‬
(
2
)
‫األستخدام‬ ‫ومعامل‬ ‫الغرفة‬ ‫تصنيف‬ ‫معامل‬ ‫بين‬ ‫العالقة‬ ‫يبين‬
‫فلورسنت‬ ‫للكشافات‬
0.72
0.7
0.66
0.63
0.59
0.53
0.49
0.44
0.37
0.3
UF (Y)
5
4
3
2.5
2
1.5
1.25
1
0.8
0.6
R. I. (X)
‫رقم‬ ‫جدول‬
(
3
)
‫صوديوم‬ ‫لكشافات‬ ‫األستخدام‬ ‫ومعامل‬ ‫الغرفة‬ ‫تصنيف‬ ‫معامل‬ ‫بين‬ ‫العالقة‬ ‫يبين‬
250
‫أو‬ ‫وات‬
‫زئبق‬
400
‫وات‬
‫الحقيقية‬ ‫القيمة‬ ‫على‬ ‫للحصول‬ ‫المعادلةاألتية‬ ‫استخدام‬ ‫يمكن‬ ‫عالية‬ ‫بالجداول‬ ‫قيمتين‬ ‫بين‬ R.I.(X) ‫قيمة‬ ‫وقوع‬ ‫حالة‬ ‫فى‬
UF = Y1+ (Y2 - Y1) * ( X - X1 )
( X2 – X1 )
1..2 – Case Study
A 9.00m length, 4.00m width and 3.00m height room , Luminary has 3 florescent lamps each 2300 lumen,
Assume utilization factor is 0.4, illumination level is 500 lux, and and maintenance factor is 0.8. Find the
number of luminaries.
‫مثـال‬
:
-
‫بعادها‬‫أ‬‫غرفة‬
9
‫طول‬ ‫متر‬
×
4.0
‫عرض‬ ‫م‬
×
3.0
‫عدد‬‫من‬ ‫مكون‬‫كشاف‬‫وكل‬ ‫تفاع‬‫ر‬‫أ‬‫م‬
3
‫لمبة‬‫لكل‬‫ألضوىئ‬‫ألفيض‬ ‫ن‬‫با‬‫علما‬،‫فلورسنت‬ ‫لمبات‬‫ثالث‬
2300
‫ليومن‬
,
‫أإلستخدأم‬‫معامل‬ ‫ن‬‫با‬‫علما‬
(
0.4
)
‫أإلضاءة‬‫شدة‬‫ومستوى‬،
500
LUX
‫ألصيانة‬‫ومعامل‬،
(
0.8
‫؟‬‫ألكشافات‬‫عدد‬‫وجد‬‫أ‬
.
Solution:
As N = where n = number of lamps / Luminaire
N = = 8.15 luminaries ~8
N.b.
a - we may use (8) lumenaries, and it are distributed as as shown in drawings
b- The distance between two luminaries is double the distance between lumenerie and
the wall.
c- The new illuminance level according to the number of luminaries as following :
‫أ‬
–
‫عدد‬ ‫إستخدام‬ ‫يمكننا‬
(
8
)
‫رقم‬ ‫بصفحة‬ ‫المبين‬ ‫للرسم‬ ‫طبقا‬ ‫كشافات‬
(
10,11
(
‫ب‬
-
‫متتاليين‬ ‫كشافين‬ ‫كل‬ ‫بين‬ ‫المسافة‬
=
‫والحائط‬ ‫كشاف‬ ‫أى‬ ‫بين‬ ‫المسافة‬ ‫ضعف‬
.
‫جـ‬
-
‫الجديد‬ ‫اإلنارة‬ ‫مستوى‬
[
‫للكشافات‬ ‫الجديد‬ ‫للعدد‬ ‫طبقا‬
(
8
] )
‫كالتالى‬ ‫حسابه‬ ‫يمكن‬
:
E =
F
F M
U
n
A
E





 
8
.
0
4
.
0
2300
3
9
4
500





LUX
A
M
U
N
n F
F
490
9
4
8
.
0
4
.
0
2300
3
8










 
2.0 – External lighting
2.1 - Calculation of Luminaries
1 - determining the level of illuminance by using table number (4)
2 - Light uniformity along the roadway is the second element of
illuminance design. It is measured in terms of ratio of the average to
minimum illuminance along the roadway Uniformity .
3 - Determining the lamp type sodium, mercury, halogen,
4 - We select the height of pole acc. Table no (5) .
5 – If w ≤ h then select single side design
as shown in fig (1)
Where :- h = pole height, w = street width
‫الخارجي‬ ‫االضاءة‬
1
-
‫رقم‬ ‫الجدول‬ ‫طريق‬ ‫عن‬ ‫اإلضاءة‬ ‫مستوى‬ ‫تحديد‬ ‫يتم‬
(
4
)
‫الطريق‬ ‫نوعية‬ ‫حسب‬
.
2
–
‫متوسط‬ ‫بنسبة‬ ‫وتقاس‬ ‫اإلضاءة‬ ‫لتصميم‬ ‫الثانى‬ ‫العنصر‬ ‫هو‬ ‫الطريق‬ ‫طول‬ ‫على‬ ‫الضوء‬ ‫إنتظام‬ ‫إن‬
‫إلى‬ ‫اإلضاءة‬
‫الطريق‬ ‫طول‬ ‫على‬ ‫إضاءة‬ ‫أقل‬
.
- 3
‫أو‬ ‫هالوجين‬ ‫أو‬ ‫صوديم‬ ‫أو‬ ‫زئبق‬ ‫تكون‬ ‫أن‬ ‫اما‬ ‫المستخدمة‬ ‫اللمبة‬ ‫نوع‬ ‫تحديد‬ ‫يتم‬
......
-
‫رقم‬ ‫للجدول‬ ‫طبقا‬ ‫العمود‬ ‫ارتفاع‬ ‫اختيار‬ ‫يتم‬
(
5
) 4
w ≤ h ‫رقم‬ ‫بالشكل‬ ‫كما‬ ‫واحد‬ ‫جانب‬ ‫من‬ ‫التصميم‬ ‫اختيار‬ ‫يتم‬
(
1
)
‫كان‬ ‫اذا‬ - 5
‫رقم‬ ‫شكل‬
(
1
)
‫الشارع‬ ‫عرض‬ ‫حيث‬
=
w
‫العمود‬ ‫ارتفاع‬ ،
=
h
6 – If h<w < 1.5h then select zigzag design
- 6
‫كان‬ ‫اذا‬
h < w< 1.5 h
‫رقم‬ ‫بالشكل‬ ‫كما‬ ‫متداخل‬ ‫تصميم‬ ‫اختيار‬ ‫يتم‬
(
2
)
‫رقم‬ ‫شكل‬
(
2
)
7- If w > 1.5 h then select double side design
- 7
‫كان‬ ‫اذا‬
w > 1.5 h
‫رقم‬ ‫بالشكل‬ ‫كما‬ ‫الجانبين‬ ‫من‬ ‫التصميم‬ ‫اختيار‬ ‫يتم‬
(
3
)
‫رقم‬ ‫شكل‬
(
3
)
8 - A luminaire is composed of alight source, a reflector, and usually a glass or
plastic lens or refractor.
9 -In designing alighting system, maximizing spacing of luminaries consistent
with good illumination design.
10-We determine the lumen of lamp according to the lamp catalogue
11- Use the next Formula for calculation of the spacing between two poles
-
‫للضوء‬ ‫مصدر‬ ‫من‬ ‫الكشاف‬ ‫يتكون‬
(
‫اللمبة‬
)
‫أوالبالستيك‬ ‫الزجاج‬ ‫من‬ ‫العاكس‬ ‫ويصنع‬ ‫والعاكس‬
-
‫الكش‬ ‫بين‬ ‫مسافة‬ ‫أقصى‬ ‫االعتبار‬ ‫فى‬ ‫األخذ‬ ‫عند‬ ً‫ا‬‫جيد‬ ‫التصميم‬ ‫يعتبر‬ ‫اإلضاءة‬ ‫تصميمات‬ ‫فى‬
‫افات‬
-
‫اللمبة‬ ‫لكتالوج‬ ‫طبقا‬ ‫المستخدمة‬ ‫للمبة‬ ‫الضوئى‬ ‫الفيض‬ ‫تحديد‬ ‫يتم‬
-
‫المستخدمة‬ ‫األعمدة‬ ‫بين‬ ‫المسافة‬ ‫لحساب‬ ‫وذلك‬ ‫التالية‬ ‫المعادلة‬ ‫استخدام‬ ‫يتم‬
.
S = Ø x U x M
W x E
S = Luminaire Spacing
W = Road width
E = Nominal illuminance level.
M = maintenance factor.
U = Utilization factor
Ø =Initial lamp lumens
‫ألكشافات‬‫بين‬‫ألمسافة‬
‫ألطريق‬‫عرض‬
‫أالضاءة‬‫شدة‬‫مستوى‬
‫ألصيانة‬‫معامل‬
‫ستخدأم‬‫أال‬‫معامل‬
‫لمبة‬‫لكل‬‫أالبتدأىئ‬‫ألفيض‬
2.2 Case Study
A road with the following data
1- Roadway Width (w) = 10m
2 – Total length of Roadway (L) = 480m
3 – Average illuminance level obtained
(E) = 20 lux from the table no. (4)
4 – High pressure sodium lamp 250w
with luminous flux 27000 lumen
5 – Assume that maintenance factor = 0.7
6 – Assume that utilization factor = 0.35
Solutions:
To find the luminaries spacing we use the following formula
‫اآلتية‬ ‫المواصفات‬ ‫له‬ ‫طريق‬
:
- 1
‫الطريق‬ ‫عرض‬
=
10
‫متر‬
- 2
‫للطريق‬ ‫الكلى‬ ‫الطول‬
=
480
‫متر‬
- 3
‫رقم‬ ‫الجدول‬ ‫من‬ ‫االستضاءة‬ ‫شدة‬ ‫متوسط‬
(
4
)
lux
20
=
E
‫صوديوم‬ ‫لمبة‬
(
‫عالى‬ ‫ضغط‬
)
‫مقدارها‬
250
، ‫وات‬
27000
‫ليومن‬
‫الحل‬
:
‫األتية‬ ‫المعادلة‬ ‫استخدام‬ ‫يتم‬ ‫الكشافات‬ ‫بين‬ ‫المسافة‬ ‫اليجاد‬
:
S = Ø x U x M = 27000 x 0.35 x 0.7 = 33 m
W x E 10 x 20
Number of luminaries = L = 480 = 14.5 15
S 33
10-15 Lux
Residential area streets, industrial area streets
3
15- 20 Lux
Secondary rood /secondary streets
2
20- 30 Lux
Highway , main road and main streets
1
Lux level
Type of rood – way
item
Table no. (4)
> 9 meter
20
3
7-9 meter
10000 – 20000
2
6-7 meter
3000 - 10000
1
Mounting height of
luminaire
Luminous flux of luminaire (lumen)
item
Table no. (5)
References:
1.0 – Manufacturers Catalogues
2.0 – Internet reports
3.0 – Roadway Lighting Handbook
4.0 - Lighting fundamentals Handbook
5.0 - Illuminating Engineering of North
America.1993 IES Handbook

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LIGHTING.ppt

  • 1.
  • 2. 1.0 – Internal lighting ‫الداخلية‬ ‫االضــــاءة‬ 1.1–Calculation of luminaries ‫الكشافات‬ ‫حسابات‬ ‫األرضية‬ ‫فراغ‬ ‫الحجرة‬ ‫فراغ‬ ‫السقف‬ ‫فراغ‬
  • 3. Room Index (R.I ) = (L X W) hrc (L + W) - From above e equations, and table of luminaries we determine the utilization factor according To the reflection of (ceiling, wall, floor) - Nominal illuminance of interiors working premises acc. to table no. (1 ) - ‫االستخدام‬ ‫معامل‬ ‫تحديد‬ ‫يتم‬ ( UF ( ‫النعكاس‬ ‫طبقا‬ ‫وذلك‬ ‫بالكشافات‬ ‫الخاصة‬ ‫والجداول‬ ‫عاليه‬ ‫المعادالت‬ ‫من‬ ‫واألرضية‬ ‫والحوائط‬ ‫السقف‬ ‫من‬ ‫الضوء‬ . - ‫االضاءة‬ ‫شدة‬ ‫تحديد‬ ‫يتم‬ E ) ( ‫رقم‬ ‫للجداول‬ ‫طبقا‬ ‫الداخلية‬ ‫لألماكن‬ ‫المستخدمة‬ ( 1 ) ‫المرفقة‬ Formula for calculation the a number of luminaries required ‫المطلوبة‬ ‫الكشافات‬ ‫عدد‬ ‫بحسابات‬ ‫الخاصة‬ ‫المعادلة‬ N = E x A . n x Ø x UF x MF Where : N : number of luminaries ‫الكشافات‬ ‫عدد‬ E : nominal illuminance level (lux) ‫شدة‬ ‫مستوى‬ ‫االضاءة‬ A : lighting area ‫اضائتها‬ ‫المراد‬ ‫المساحة‬ n : number of lamp / luminaire ‫الكشاف‬ ‫لمبات‬ ‫عدد‬ Ø : nominal luminous flux of lamp ‫لمبة‬ ‫لكل‬ ‫الضوئى‬ ‫الفيض‬ UF: coefficient of utilization ‫اإلستخدام‬ ‫معامل‬ MF: maintenance factor ‫الصيانة‬ ‫معامل‬ ‫الغرف‬ ‫تصنيف‬ ‫معامل‬ ‫ة‬
  • 4. Nominal luminous flux of lamp, utilization factor, can be found in luminaire manufacturers lists ‫َع‬‫ن‬‫المص‬ ‫لبيانات‬ ‫طبقا‬ ‫تحديدهما‬ ‫يتم‬ ‫االستخدام‬ ‫ومعامل‬ ‫لمبة‬ ‫لكل‬ ‫الضوئى‬ ‫الفيض‬ ‫شكل‬ ‫ملحوظة‬ ‫استرشادية‬ ‫جداول‬ ‫مرفق‬ ‫رقم‬ ( 2,3 ) ‫األستخدام‬ ‫معامل‬ ‫آليجاد‬ ‫استخدامها‬ ‫يمكن‬ ‫الحصول‬ ‫امكانية‬ ‫عدم‬ ‫حالة‬ ‫فى‬ ‫على‬ ‫لتحديدة‬ ‫الآلزم‬ . (Room Index) ‫الغرفة‬ ‫تصنيف‬ ‫لمعامل‬ ‫طبقا‬ ‫وذلك‬ ‫الكتالوجات‬
  • 5. Room Room index Reflectance's C W F 0.75 1 1.25 1.5 2 2.5 3 4 5 0.5 NA 0.48 0.52 0.56 0.6 0.62 0.64 0.66 0.68 0.7 0.3 0.2 NA 0.44 0.49 0.52 0.56 0.59 0.61 0.64 0.66 0.1 NA 0.41 0.46 0.49 0.54 0.57 0.59 0.62 0.64 0.5 NA 0.47 0.51 0.54 0.58 0.6 0.62 0.64 0.65 0.5 0.3 0.2 NA 0.44 0.48 0.51 0.55 0.58 0.6 0.62 0.64 0.1 NA 0.41 0.45 0.48 0.53 0.56 0.58 0.61 0.62 0.5 NA 0.46 0.5 0.52 0.56 0.58 0.6 0.61 0.63 0.3 0.3 0.2 NA 0.43 0.47 0.5 0.54 0.56 0.58 0.6 0.61 0.1 NA 0.41 0.45 0.48 0.52 0.54 0.56 0.59 0.6 0 0 0 NA 0.39 0.43 0.46 0.5 0.52 0.54 0.56 0.58 ‫رقم‬ ‫جدول‬ ( 2 ) ‫األستخدام‬ ‫ومعامل‬ ‫الغرفة‬ ‫تصنيف‬ ‫معامل‬ ‫بين‬ ‫العالقة‬ ‫يبين‬ ‫فلورسنت‬ ‫للكشافات‬
  • 6. 0.72 0.7 0.66 0.63 0.59 0.53 0.49 0.44 0.37 0.3 UF (Y) 5 4 3 2.5 2 1.5 1.25 1 0.8 0.6 R. I. (X) ‫رقم‬ ‫جدول‬ ( 3 ) ‫صوديوم‬ ‫لكشافات‬ ‫األستخدام‬ ‫ومعامل‬ ‫الغرفة‬ ‫تصنيف‬ ‫معامل‬ ‫بين‬ ‫العالقة‬ ‫يبين‬ 250 ‫أو‬ ‫وات‬ ‫زئبق‬ 400 ‫وات‬ ‫الحقيقية‬ ‫القيمة‬ ‫على‬ ‫للحصول‬ ‫المعادلةاألتية‬ ‫استخدام‬ ‫يمكن‬ ‫عالية‬ ‫بالجداول‬ ‫قيمتين‬ ‫بين‬ R.I.(X) ‫قيمة‬ ‫وقوع‬ ‫حالة‬ ‫فى‬ UF = Y1+ (Y2 - Y1) * ( X - X1 ) ( X2 – X1 )
  • 7. 1..2 – Case Study A 9.00m length, 4.00m width and 3.00m height room , Luminary has 3 florescent lamps each 2300 lumen, Assume utilization factor is 0.4, illumination level is 500 lux, and and maintenance factor is 0.8. Find the number of luminaries. ‫مثـال‬ : - ‫بعادها‬‫أ‬‫غرفة‬ 9 ‫طول‬ ‫متر‬ × 4.0 ‫عرض‬ ‫م‬ × 3.0 ‫عدد‬‫من‬ ‫مكون‬‫كشاف‬‫وكل‬ ‫تفاع‬‫ر‬‫أ‬‫م‬ 3 ‫لمبة‬‫لكل‬‫ألضوىئ‬‫ألفيض‬ ‫ن‬‫با‬‫علما‬،‫فلورسنت‬ ‫لمبات‬‫ثالث‬ 2300 ‫ليومن‬ , ‫أإلستخدأم‬‫معامل‬ ‫ن‬‫با‬‫علما‬ ( 0.4 ) ‫أإلضاءة‬‫شدة‬‫ومستوى‬، 500 LUX ‫ألصيانة‬‫ومعامل‬، ( 0.8 ‫؟‬‫ألكشافات‬‫عدد‬‫وجد‬‫أ‬ . Solution: As N = where n = number of lamps / Luminaire N = = 8.15 luminaries ~8 N.b. a - we may use (8) lumenaries, and it are distributed as as shown in drawings b- The distance between two luminaries is double the distance between lumenerie and the wall. c- The new illuminance level according to the number of luminaries as following : ‫أ‬ – ‫عدد‬ ‫إستخدام‬ ‫يمكننا‬ ( 8 ) ‫رقم‬ ‫بصفحة‬ ‫المبين‬ ‫للرسم‬ ‫طبقا‬ ‫كشافات‬ ( 10,11 ( ‫ب‬ - ‫متتاليين‬ ‫كشافين‬ ‫كل‬ ‫بين‬ ‫المسافة‬ = ‫والحائط‬ ‫كشاف‬ ‫أى‬ ‫بين‬ ‫المسافة‬ ‫ضعف‬ . ‫جـ‬ - ‫الجديد‬ ‫اإلنارة‬ ‫مستوى‬ [ ‫للكشافات‬ ‫الجديد‬ ‫للعدد‬ ‫طبقا‬ ( 8 ] ) ‫كالتالى‬ ‫حسابه‬ ‫يمكن‬ : E = F F M U n A E        8 . 0 4 . 0 2300 3 9 4 500      LUX A M U N n F F 490 9 4 8 . 0 4 . 0 2300 3 8            
  • 8.
  • 9.
  • 10. 2.0 – External lighting 2.1 - Calculation of Luminaries 1 - determining the level of illuminance by using table number (4) 2 - Light uniformity along the roadway is the second element of illuminance design. It is measured in terms of ratio of the average to minimum illuminance along the roadway Uniformity . 3 - Determining the lamp type sodium, mercury, halogen, 4 - We select the height of pole acc. Table no (5) . 5 – If w ≤ h then select single side design as shown in fig (1) Where :- h = pole height, w = street width ‫الخارجي‬ ‫االضاءة‬ 1 - ‫رقم‬ ‫الجدول‬ ‫طريق‬ ‫عن‬ ‫اإلضاءة‬ ‫مستوى‬ ‫تحديد‬ ‫يتم‬ ( 4 ) ‫الطريق‬ ‫نوعية‬ ‫حسب‬ . 2 – ‫متوسط‬ ‫بنسبة‬ ‫وتقاس‬ ‫اإلضاءة‬ ‫لتصميم‬ ‫الثانى‬ ‫العنصر‬ ‫هو‬ ‫الطريق‬ ‫طول‬ ‫على‬ ‫الضوء‬ ‫إنتظام‬ ‫إن‬ ‫إلى‬ ‫اإلضاءة‬ ‫الطريق‬ ‫طول‬ ‫على‬ ‫إضاءة‬ ‫أقل‬ . - 3 ‫أو‬ ‫هالوجين‬ ‫أو‬ ‫صوديم‬ ‫أو‬ ‫زئبق‬ ‫تكون‬ ‫أن‬ ‫اما‬ ‫المستخدمة‬ ‫اللمبة‬ ‫نوع‬ ‫تحديد‬ ‫يتم‬ ...... - ‫رقم‬ ‫للجدول‬ ‫طبقا‬ ‫العمود‬ ‫ارتفاع‬ ‫اختيار‬ ‫يتم‬ ( 5 ) 4 w ≤ h ‫رقم‬ ‫بالشكل‬ ‫كما‬ ‫واحد‬ ‫جانب‬ ‫من‬ ‫التصميم‬ ‫اختيار‬ ‫يتم‬ ( 1 ) ‫كان‬ ‫اذا‬ - 5
  • 11. ‫رقم‬ ‫شكل‬ ( 1 ) ‫الشارع‬ ‫عرض‬ ‫حيث‬ = w ‫العمود‬ ‫ارتفاع‬ ، = h
  • 12. 6 – If h<w < 1.5h then select zigzag design - 6 ‫كان‬ ‫اذا‬ h < w< 1.5 h ‫رقم‬ ‫بالشكل‬ ‫كما‬ ‫متداخل‬ ‫تصميم‬ ‫اختيار‬ ‫يتم‬ ( 2 ) ‫رقم‬ ‫شكل‬ ( 2 )
  • 13. 7- If w > 1.5 h then select double side design - 7 ‫كان‬ ‫اذا‬ w > 1.5 h ‫رقم‬ ‫بالشكل‬ ‫كما‬ ‫الجانبين‬ ‫من‬ ‫التصميم‬ ‫اختيار‬ ‫يتم‬ ( 3 ) ‫رقم‬ ‫شكل‬ ( 3 )
  • 14. 8 - A luminaire is composed of alight source, a reflector, and usually a glass or plastic lens or refractor. 9 -In designing alighting system, maximizing spacing of luminaries consistent with good illumination design. 10-We determine the lumen of lamp according to the lamp catalogue 11- Use the next Formula for calculation of the spacing between two poles - ‫للضوء‬ ‫مصدر‬ ‫من‬ ‫الكشاف‬ ‫يتكون‬ ( ‫اللمبة‬ ) ‫أوالبالستيك‬ ‫الزجاج‬ ‫من‬ ‫العاكس‬ ‫ويصنع‬ ‫والعاكس‬ - ‫الكش‬ ‫بين‬ ‫مسافة‬ ‫أقصى‬ ‫االعتبار‬ ‫فى‬ ‫األخذ‬ ‫عند‬ ً‫ا‬‫جيد‬ ‫التصميم‬ ‫يعتبر‬ ‫اإلضاءة‬ ‫تصميمات‬ ‫فى‬ ‫افات‬ - ‫اللمبة‬ ‫لكتالوج‬ ‫طبقا‬ ‫المستخدمة‬ ‫للمبة‬ ‫الضوئى‬ ‫الفيض‬ ‫تحديد‬ ‫يتم‬ - ‫المستخدمة‬ ‫األعمدة‬ ‫بين‬ ‫المسافة‬ ‫لحساب‬ ‫وذلك‬ ‫التالية‬ ‫المعادلة‬ ‫استخدام‬ ‫يتم‬ . S = Ø x U x M W x E S = Luminaire Spacing W = Road width E = Nominal illuminance level. M = maintenance factor. U = Utilization factor Ø =Initial lamp lumens ‫ألكشافات‬‫بين‬‫ألمسافة‬ ‫ألطريق‬‫عرض‬ ‫أالضاءة‬‫شدة‬‫مستوى‬ ‫ألصيانة‬‫معامل‬ ‫ستخدأم‬‫أال‬‫معامل‬ ‫لمبة‬‫لكل‬‫أالبتدأىئ‬‫ألفيض‬
  • 15. 2.2 Case Study A road with the following data 1- Roadway Width (w) = 10m 2 – Total length of Roadway (L) = 480m 3 – Average illuminance level obtained (E) = 20 lux from the table no. (4) 4 – High pressure sodium lamp 250w with luminous flux 27000 lumen 5 – Assume that maintenance factor = 0.7 6 – Assume that utilization factor = 0.35 Solutions: To find the luminaries spacing we use the following formula ‫اآلتية‬ ‫المواصفات‬ ‫له‬ ‫طريق‬ : - 1 ‫الطريق‬ ‫عرض‬ = 10 ‫متر‬ - 2 ‫للطريق‬ ‫الكلى‬ ‫الطول‬ = 480 ‫متر‬ - 3 ‫رقم‬ ‫الجدول‬ ‫من‬ ‫االستضاءة‬ ‫شدة‬ ‫متوسط‬ ( 4 ) lux 20 = E ‫صوديوم‬ ‫لمبة‬ ( ‫عالى‬ ‫ضغط‬ ) ‫مقدارها‬ 250 ، ‫وات‬ 27000 ‫ليومن‬ ‫الحل‬ : ‫األتية‬ ‫المعادلة‬ ‫استخدام‬ ‫يتم‬ ‫الكشافات‬ ‫بين‬ ‫المسافة‬ ‫اليجاد‬ : S = Ø x U x M = 27000 x 0.35 x 0.7 = 33 m W x E 10 x 20 Number of luminaries = L = 480 = 14.5 15 S 33
  • 16.
  • 17. 10-15 Lux Residential area streets, industrial area streets 3 15- 20 Lux Secondary rood /secondary streets 2 20- 30 Lux Highway , main road and main streets 1 Lux level Type of rood – way item Table no. (4) > 9 meter 20 3 7-9 meter 10000 – 20000 2 6-7 meter 3000 - 10000 1 Mounting height of luminaire Luminous flux of luminaire (lumen) item Table no. (5)
  • 18. References: 1.0 – Manufacturers Catalogues 2.0 – Internet reports 3.0 – Roadway Lighting Handbook 4.0 - Lighting fundamentals Handbook 5.0 - Illuminating Engineering of North America.1993 IES Handbook