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298 CHAPTER 13
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Elevation Section of Hollow Glass Block to Indicate Location of Surface Patterns
/
Type I A, D B C E
--Smooth Face Smooth Wide vertical ribs or flutes Wide horizontal ribs or flutes None
Type IV--Light Diffusing
.
A, D: Close pitch deep horizontal
corrugations
B, C: Vertical light diffusing prisms
E: None
Type II --Semi-Light Diffusing
Type IVA1--Light Diffusing
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 of 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 heal gain add these values to Table St values
H a
Son Time
D
1 AM->
4.
Instantaneous Heat Gain in Btu peb (hb) (sq ft) N NE E SE s SW W NW
s
6 a.m.
6 p.m.
4 45 55 12 2 2 2 i
7 8
5 4
5 59 94 29 4 3 3 3 5 42 94 38 5 4 4 4
9 o
3
5 25 59 34 6 5 5 5
a Q
10
2
6 12 27 24 9 6 6 6 '
11 1
6
8 12 13 10
7 6 .6
6 6 78 9 8
6
5 a.m. 6
7 p.m. 6
3 30 0 000 5 50 67 17 2 2 2 2 -
o7 Z8
5 4
4 54 98 36 4 4 4 4 5 34 90 47 5 4 4 4 ,
o m9
10 11
3 2 1
5 18 59 47 10 5 5 5 -
6
8 29 35 15
566
6
6
13 22
18
766
6
6
6 13
17
13 6
6
5 a.m.
7 p.m.
4 28 27 4 1 1 1
6
03 o
7
28
6 5
4
5 53 77 22 3 2 2 2 4 44 101 44 4 4 4 4 4 26 86 57 7 4 4 4
o H
9
Q 10
o 11
3 2
1
5
12
57 60
16
555
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
299
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, III, IV, IVA and V*
For Clear Atmospheres and 18 Deg Declination, North {August 1)
For 80 F Indoor Temperature
Note: For total instantaneous heat gain add these values to values in Table 18, or Table SO adjusted by Table SS factors.
Son Time
DrtFahr.
5 a.m. 6 7 8 9
10 11 12 I 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 per (hr) (sq ft)
N
--3 0 1 0 0
2 4 6 8 9
11 11 11 13 11
7 4
NE
--3 3 15
21 20
12 6 8 10 10
11 11 10 9 7
4 3
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 11 10
9 7
4 3
S
--3 --2 --1
1 5
12 19 23 26 25
21 16 13 11 8
4 2
SW
--3 --2 --1
0 1
3 5 9 25 37
44 45 43 35 19
7 3
W NW
--3 --2 --1
0 2
3 6 8 12 28
41 44 42* 35* 21*
7 4
--3 --2 --1
0 1
3 5 7 9 11
` 17 30 35 29 15
4 3
Son Time
DrtBulb
Latitude
SE
S
SW
Latitude
SE
S
SW
5 a.m. 6 7 8 9 10 .12 1 p.m.
8 --
74 74 75 77 SO
83 87 90 93 94
95 94 93 91 87
85 83
--3 --3 --3 1 --2 --2
11 --1 --1 20 0 0 26 1 2
30b
Degrees North
Latitude
29 4 4
26 8 5
18 12
7
10 15 16
11 16 30
12 14 39 J2 13 43 11 11 41 10 9 32
6 6 15
446 333
50 Degrees
North Latitude
--3 --3 --3 5 --2 --2 13 --1 --1
21 0 0 27 6 1
32 15
2
35 22
4
33 28 17
23 31 31
12 32 39
11 28 43 11 20 44 10 12 43 9 10 36
7 7 23
4 4 10 333
- * Tor types III, IV. IVA and V patterns and 30, 40 and 50 deg latitudes, multiply east wall values for 6, nd S a.m. by 1.40, and west wall values for 5, 6 and 7 p.m. by 1.25. For N, NE, E, W and NW use 40 deg North Latitude values.
Design Tables for Rolled Figured Glass
Tables 17 and 18 give design values of instantaneous rates of heat gain 'or 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 t a nominal August 1 day, and are based upon the solar intensity values lor 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
y the approximate percentages given in Table 18. To obtain instananeous 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
ill:
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