Palram PALGAR - Manual (Page 9)

PALSUN® PALGARD™
Glazing Guide
9
Table 4. PALSUN & PALGARD Optical & Thermal Properties - Solar Radiation Transmission
LT % LR % ST % SR % SA % SR
t
% ST
t
% SC
Obligatory Standard / Testing Method
PALSUN Type
(Standard PALGARD
Comes only in Clear)
Thic
knes
s
(mm)
ASTM
D-
1003 ASTM
E424-71
Clear 3.0 88 10 84 10 4 12 88 1.00
Clear Embossed 3.0 85-87 10-12 81-83 10-12 3-7 14 86 1.00
50% 50 7 54 7 39 26 74 0.75
35% 35 6 42 6 52 32 68 0.64 Bronze
20%
All
20 6 28 6 66 39 61 0.52
50% 50 7 54 7 39 37 63 0.75
35% 35 6 42 6 52 32 68 0.64 Solar Gray
20%
All
20 6 27 6 67 38 62 0.54
1.0 35 55 40 47 13 53 47 0.54
1.5 45 50 48 41 11 46 54 0.52
2.0 39 54 42 45 13 52 48 0.41
3.0 28 58 36 48 14 57 43 0.35
4.0 19 59 24 61 15 69 31 0.31
5.0 14 60 21 72 17 71 29 0.26
Opal-White
6.0 11 61 13 77 21 77 23 0.23
20% 20 30 18 33 49 58 42 0.36
35% 35 28 35 28 37 47 53 0.54
Solar Control
(Aluminum Gray)
50%
All
50 24 48 24 28 48 52 0.64
35% 35 56 33 49 18 58 42 0.34 Solar Ice
(Pearly White) 50%
All
50 45 46 38 16 46 54 0.51
Notes:
1. Values in this table are based mostly on known data about the various sheets in it and partly on theoretical
calculations & interpolations. Performance of other sheets absent from table would be assessed by
approximated extrapolations.
2. See enhanced definitions below for acronyms on top of table.
Definitions
Visible Light Radiation: The range of the light spectrum wavelength from 400 to 700 nm.
% Light Transmission (%LT): Percentage of incident visible light passing through a light transmitting object
.
% Light Reflection (%LR): Percentage of incident visible light striking an object, reflecting back as is.
% Light Absorption (%LA): Percentage of incident visible light striking an object and absorbed by it.
%LT + %LR + %LA = 100%
Solar Radiation:
The solar spectrum ranging from 300 to 2400 nm. Includes UV, visible, NIR &
FIR radiation.
% Solar Transmission (%ST): Percentage of complete range of incident solar radiation passing directly
through a light transmitting object.
% Solar Reflection (%SR) Percentage of incident solar radiation striking an object, reflecting back as is.
% Solar Absorption (%SA): Percentage of incident solar radiation that strikes an object and is absorbed by
it.
%ST + %SR + %SA = 100%
Total Solar Transmission (%ST
t
): Percentage of incident solar radiation transmitted by an object, including the
direct solar transmission plus a part of the solar absorption reradiated inward.
Total Solar Reflection (%SRt): Percentage of incident solar radiation reflected by an object, including solar
reflectance plus a part of the solar absorption, reradiated outward.
%STt + %SRt = 100%
Shading Coefficient (SC):
The ratio of total solar radiation transmitted by a given material to that
transmitted by a regular clear glass, with 87% LT.
It can be approximately calculated by: SC = 1.15 x ( %ST + 0.27.%SA ) / 100
%ST + 0.27 x %SA = %STt
SC = 1.15 x STt/100