Document 50pDK58vjmwDnEqLrqm2Onnk0

306 CHAPTER 13 1956 Guide Table 21. Instantaneous Rates op 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 20 adjusted by Table 22 factors. Sun Time DbyFahr. 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 per (hr) (sq ft) N NE E SE S SW W NW --3 --3 --3 --3 --3 --3 --3 --3 0 3 4* 3 --2 --2 --2 --2 1 15 17* 13 --1 --1 --1 --1 0 21 .26* 21 1 0 0 0 0 20 33 27 5 1 2 1 2 12 . 36 32 12 3 3 3 4 6 29 32 19 5 6 5 6 8 - 16 26 23 9 8 7 8 10 14 14 26 25 12 9 9 10 15 11 . 25 37 28 11 11 11 16 11 21 44 41 17 11 11 15 11 16 45 44 30 11 10 13 10 13 43 42* 35 13 9 11 9 11 35 35* 29 11 7 8 7 8 19 21* 15 7 4 4 4 4 7 74 4 3 2 3 2 3 43 Sun Time DryBulb Latitude SE S SW Latitude SE S SW 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 Latitude --3 --3 --3 1 --2 --2 11 --1 --1 20 0 0 26 1 2 29 4 4 26 8 5 18 12 7 10 15 16 11 16 30 12 14 39 12 13 43 n 11 41 10 9 32 6 6 15 4 4 16 333 50b 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 10 20 12 44 43 9 10 36 7 7 23 4 3 4 10 33 a For types HI. IV, IVA and V patterns and 30, 40 and 50 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 values. determined values of solar energy absorption and temperature difference between the two faces. Because the exact dependence of the latter on weather conditions has not been determined, the values of convection and radiation gain cannot be regarded as exact for the assumed design con ditions. Indoor and outdoor convection and radiation heat transfer data are the same as those used for common window glass. Table 23 gives cor rections to be applied for other design temperatures. To obtain transmitted direct and diffuse solar radiation for other types of 8-in. block, the Table 20 values are multiplied by the approximate per centages given in Table 22. Note that corrections are the same for all latitudes, and that they vary only on the surfaces exposed to the direct sun. The convection and radiation gain values for all blocks are so nearly Table 22. Instantaneous Rates or Heat Gain Due to Transmitted Dibect and Dirruss Solas Radiation by Unbhaded Walls or 8-in Hollow Glass Block of Types II, III, IV, IVA and V Patterns Multiply the Table SO Values for Type I by These Percentage 'Factors For Clear Atmospheres and 18 Deg Declination, North (August 1) For SO, 40, and SO Deg North Latitude Note: To obtain total instantaneous heat gain add adjusted Table SO values to the Table SI values. Instantaneous Heat Gain Due to Transmitted Solar Radiatm!* * * -------------- ~ Suit Time AM l Type 0 Pattern N. NW, w, SW NE E SE -- LRLWdAQB OP 1TPBI Type HI Pattern 8 N.NW, W, SW NE E SE 1 S 6 a.m. 2 l S9 10 n 12 7pja. 100 8 100 6 160 34 2 l 100 100 100 100 100 100 95 90 95 95 95 100 100 100 95 90 90 85 95 95 100 100 90 90 90 90 95 05 100 100 100 100 100 90 96 100 100 N. NE, E.8E NW W SW 8 70 70 70 70 70 70 70 70 N, NE, E, SE 70 65 65 65 65 70 70 70 70 65 60 60 65 70 70 70 70 70 65 65 70 75 80 NW W SW 70 70 70 70 65 65 75 S Sun Time AM --* l Type IV Pattern N, NW, W, SW NE E SE s Type IVA Pait CRN = N. NW, w, SW NE E SE S RJR. I 9 10 ' !i 7 pjR. a3 65 . 66 55 55 55 55 55 55 45 45 45 45 50 55 55 55 35 35 35 30 25 35 45 55 75 80 60 40 30 30 35 50 55 55 55 55 60 50 40 45 65 55 55 55 55 55 55 55 45 35 35 45 50 55 55 55 35 30 35 30 40 35 45 45 65 65 85 90 70 105 55 55 55 55 55 60 60 95 Pli -- N. NE, E, SE NW W SW S N, NE, E, SE . NW W SW S AM1 5 a.m. 6 7 8 9 10 11 12 7 pjn. 6 5 4 3 2 pt- N, NW, I XT_ W, SW I ^ E SE 8 60 60 60 60 60 60 60 60 35 30 35 30 40 35 65 50 90 90 105 105 60 60 60 60 60 Pft* 60 80 60 110 106* 85 115* E, SE' W SW S v^iiguauuu Ol DIOCK Type II--Semi-Light Diffusing III--Light Diffusing IV--Light Diffusing IVA--Light Diffusing V--Light Directing *iSx5rm,oT 30 de*Nu"- Tablb 23. Approximate Corrections to Tables 14 and 21 for Deviations prom Indoor and Outdoor Design Temperatures For each degree the design room temperature exceeds 80 F, subtract correction. For each degree the design outdoor dry-bulb temperature exceeds 95 F, add correction. Apply these corrections to each value in Table 14 or Table SI. Glass Type Single Plat or Rolled Figured Glass Double Flat Glass and Glass Block Correction Bto per (hr) (bq ft) 1.0 0.5