Document zbd9bZwo0EMzY3OMrz37xvNLB
292
CHAPTER 13
*1953Gttid'e
1 TableU9. Description op Glass Block Patterns'
A - Outdoor surface
D-Indoor surface
E- Cavity partition.
Elevation Section of Hollow Glaes Bloch to Indicate Location of Surface Patterns
Type I 1 --Smooth Face ' A, D: ' Smooth
Type IV--Light Diffusing . . A, D: Close pitch deep horizontal
B: C: E:
Wide vertical ribs or flutes Wide horizontal ribs or flutes None
corrugations .
,
B, C: Vertical light diffusing prisms
E: None
Type II --Semi-Light Diffusing
Type IVA--Light Diffusing1, !
A, D Narrow vertical ribs or flutes B, C Etched or stippled
Same as IV except corruga tions vertical^ '
E None
Type V.^-Light Directing
Type III--Light Diffusing A, D: Narrow vertical ribs or flutes B, C: Etched or stippled E: Glass fiber screen
A, D: B, C:
E:
Close pitch deep vertical cor
rugations
Horizontal light directing
prisms
.^
None
Table 20. Instantaneous Rate op Heat Gain Due to-Transmitted Direct and Diffuse Solar Radiation by Unshaded Walls of 8-in. Hollow Glass
Block of Type I Pattern
For Clear Atmospheres and 18 Deg Declination, North (August 1)
Note: For total instantaneous heat gain add these values to Table SI values
ap Sun Time
Instantaneous Heat Gain in Btu peb (hr) (sq ft)
jjj AM-> i
N NE E SE S SW W NW
tu os
ow `Q -
s o, Z H
S
w. o Z oa O s
6 a.m.
8 9
10 . 11
5 a.m. 6 7 8
9
5 a.m. 6
8
9 10 11
6 p.m.
4 3
2 1
7 p.m. 6 5 4
3
7 p.m, 6
4
3 2 1
4 45 55 12 2 2 2 2 5 59 94 29 4 3 3 3 5 42 94 38 5 4 4 4 5 25 59 34 6 5 5 5
6 12 27 24
9
6 8 12 13 10
6
6
78
9
66 76
87
6
6 6
3 30 0
5 50 67 17
2
4 54 98 36 4
5 34 90 47 5
00 22
44 44
0 2 4 4
5 18 59 47 10 5 5 5
6
8 29 35 15
56
6
6
6
13 22
18
7 `6/ 6
6 6 6 13 17 13 6 i 6
4 28 27 . 4
j
5 53 77 22. 3
4 44 101 44 4
4 26 86 57
7
1
22 44 44
,
2 4 4
5
12
57 60
16
5 5 .5
5
6
29 54
25
65
5
6 6 14 34 32 10 6 6-
6
6
6 20 34 20
6
6
t PM->
N NW W SW S
SE E
NE
Cooling Load
> ; ' -;
293
Table 21. Instantaneous Rates, of Heat Gain by Convection and Radiation from Unshaded Walls of .'8-in. Hollow Glass Block of Patterns
Type I, II',. Ill, IV, IVA and V*
For Clear Atmospheres and 18 Deg Pectination, North (August 1)
For 80 F Indoor Temperature
Note: For total instantaneous heat gain add these values to values in Table 18, pr Table SO adjusted by Table SS factors.
Sun Time
DbyBulb
Fahb.
5 a.m. 6 7 8 9
10 11 12 1 p.m. 2
3 4 5 6 7
8 9
. 74 74 75 77 80
83 . 87
90 93 94
95 94 93 91 87
85 83
40 Degrees
North Latitude
Instantaneous Heat Gain in Btu peb (hb) (sq pt)
N NE
--3 --3 03 1 15 0 21 0 20
2 12 4 ' 6 68 8 10 9 10
11 11 11 11 11 10 13 9 11 7
7 4 43
E
--3 4* 17* 26* 33
36 29 16 14 15
16 15 13 11 8
4 2
SE
--3 3 13 21 27
32 32 26 14 11
11 a10 9 7
4 3
S
--3 --2
1 5
12 19 23 26 25
21 16 13 a 8
4 2
"SW W NW
--3 --3
--2 --2 --1 --1
00 12
33 56 98 25 12
37 28
44
45 43 35
19 '
41
44 42* 35* 21*
7 -7: 34
--3 --2 --1
0 1
3. 5 7 9 a
17 -30
35 29 15
4 3
Sun Time
DryBulb
Latitude
6 7 8 9
10 11 12 1 p.m. 2
3 4 5 6 7
8 9
74 74 75 77 80
83 87 90 93 . 94
. 95 94 93 91 87
85 83
30b Degrees
North
SE S . SW
--3 --3 -1 --2 11 --1 0 0 26 1
29 26 18 10. 11
4 8 12
15 16
12 14
12 13 11 11 10 9 66
44 33
--3 --2 --1
0 2
4 5 7 16 30
39 43 41 32 15
6 3
Latitude SE S SW
j
50D Degrees-
North latitude
--3 5
. 13 21 27-
32 35 33 23 12
11 11 10 9 7
4 3
--3 --3 --2 --2 --l --1 .
00
61
15 22
28 31 32
2 4 17 31 39
28 43 20 44
12 43 10 36.
7 23
4 .10 33
* For types III, IV, IVA and V patterns and 30, 40 and 60 deg latitudes, multiply east wall values for 6, 7 and 8 a.m. by 1.40, and west wall values for 5, 6 and 7 p.m. by 1.25.
b For N, NE, E, W and NW use 40 deg North Latitude yalues.
Design Tables for Rolled Figured Glass
Tables 17 and 18 give design values of instantaneous rates of heat gain for a number of common patterns of single vertical sheets of rolled figured glass. The tables are for a solar declination of 18 deg, which corresponds to a nominal August 1 day, and are.based upon the solar intensity values for a clear atmosphere as given in Table 4. The values are given in terms of corrections to apply to Tables 13 and 14. The heat gain due to transmitted solar radiation is found by multiplying the Table 13 values by the approximate percentages given in Table 18. To obtain instan taneous rates of heat gain by convection and radiation, Table 16 values are multiplied by the appropriate value of Y from Table 17 and then added to