Document Rj4XRb533MEQq7YO6dknrmm9a

Heating Ventilating Air Conditioning Guide 1938 Table 3. Properties of Dichlorodifluoromethane(Fu) Sat. Temp. F Abs Press. Lb per SqIn. Volume Liquid Heat Content and Entropt Taken From --40 F Heat C liquid Entropy 25 F Superheat 50 F Superheat Ht Ct Entropy Ht Ct, I Entropy 0 2 4 5 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 39 40 41 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 80 82 84 86 88 90 92 94 96 98 100 102 23.8 10.OIK0 1.63 24.8!>0.011 0 1.57' 25.9< 0.011 1.51! 26.5 0.011 1.48! 27.0.>0.011 1.45' 28.11 0.011 1.403 29.31 o.ou; 1.351 30.5( o.ou; 1.301 31.80 0.0112 1.253 33.08 0.0115 1.207 34.4C 0.0113 1.163 35.75 o.on; 1.121 37.15 o.ou; 1.081 38.58 o.on; 1.043 40.07 0.011! 1.007 41.59 0.011! -0.973 43.16 0.0115 0.939 44.77 0.0115 0.908 46.42 0.0115 0.877 48.13 0.0116 0.848 49.88 0.0116 0.819 50.78 0.0116 0.806 51.68 0.0116 0.792 52'.70 0.0116 0.779 53.51 0.0116 0.767 55.40 0.0117 0.742 57.35 0.0117 0.718 59.35 0.0117 0.695 61.39 0.0118 0.673 63.49 0.0118 0.652 65.63 0.0118 0.632 67!84 0.0119 0.612 70.10 0.0119 0.593 72.41 0.0119 0.575 74.77 0.0120 0.557 .77.20 0.0120 0.540 79.67 0.0120 0.524 82.24 0.0121 0.508 84.82 0.0121 0.493 87.50 0.0121 0.479 90.20 0.0122 0.464 93.00 0.0122 0.451 95.85 0.0123 0.438 98.76 0.0123 0.425 101.70 0.0123 0.413 L04.8 0.0124 0.401 07.9 0.0124 0.389 Lll.l 0.0124 0.378 14.3 0.0125 0.368 17.7 >.0125 0.357 21.0 >.0126 0.347 24.5 C>.0126 0.338 28.0 C>.0126 0.328 31.6 C>.0127 0.319 35.3 C .0127 0.310 8.25 78.21, 0.01869, 8.67 78.44| 0.01961 9.10 78.67 0.02052 9.32 78.79, 0.02097 9.53 78.90] 0.02143 9.96 79.13: 0.02235 10.39 79.36! 0.02328 10.82 79.59 0.02419 11.26 79.82: 0.02510] 11.70 80.05 0.02601 12.12 80.27 0.02692 12.55 80.49 0.02783 13.00 80.72 0.02873 13.44 80.95 0.02963 13.88 81.17] 0.03053] 14.32 81.39 0.03143 14.76 81.61 0.03233 15.21 81.83] 0.03323 15.65 82.05 0.03413 16.10 82.27 0.03502 16.55 82.49] 0.03591 16.77 82.60, 0.03635 17.00 82.71 0.03680] 17.23 82.82, 0.03725. 17.46 82.93) 0.03770] 17.91 83.15 0.03859 18.36 83.36, 0.03948, 18.82 83.57 1-0.04037 19.27 83.78 0.04126 19.72 0.04215| 20.18 84.20 0.04304 20.64 84.41 0.04392 21.11 84.62 0.04480, 21.57 0.04568, 22.03 0.04657] 22.49 0.04745, 22.95 0.04833 23.42 0.04921 >1 81.7 0.17829 85.26 0.18547 IS 81.9 ! 0.17812 85.51 0.18529 >0 82.1 0.17795 85.76, 0.18511 >2 82.2< 0.17786 85.89] 0.18502 15 82.4 0.17778 86.01 0.18494 0 82.6( 0.17763 86.26] 0.18477 5 82.91 : 0.17747 86.51 0.18460 >1 83.1! 0.17733 86.76 0.18444 7 83.38 0.17720 87.01 0.18429 4 83.6 0.17706 87.26 0.18413 1 83.8! 0.17693 87.51 0.18397 9 84.09 0.17679 87.76] 0.18382 8 84.32 0.17666 88.00 0.18369 6 84.55 0.17652 88.24] 0.18355 3 84.79 0.17639 88.49 0.18342 0 85.02 0.17625 88.73 0.18328 7 85.25 0.17612 88.97 0.18315 6 85.48 0.17600 89.21 0.18303 5 85.71 0.17589 89.45 0.18291 4 85.95 0.17577 89.68 0.18280 3 86.18 0.17566 89.92 0.18268 8 86 29 0.17560 90.04] 0.18262 3 86.41 0.17554 90.16 0.18256 8 86.52 0.17549 90.28, 0.18251 3 86.64 0.17544 90.40| 0.18245 3 86.86 0.17534 90.65 0.18235 3 87.09 0.17525 90.89 0.18224 1 87.31 0.17515 91.14 0.18214 87.54 0.17505 91.38] 0.18203 5 87.76 0.17496 91.61 0.18193 87.98 0.17486 0.18184 88.20 0.17477 0.18174 88.42 0.17467 0.18165 88.64 0.17458 0.18155 88.86 0.17450 0.18147 89.07 0.17442 0.18139 89.29 0.17433 0.18130 89.50 0.17425 0.18122 23.90 0.05009 0.16701 89.72 0.17417 0.18114 24.37 24.84 25.32 25.80 0.05097! 89.93 0.17409 0.05185 90.14 0.17402 0.05272 90.36 0.17394 0.05359 0.16669 90.57 0.17387 0.18106 0.18098 0.180M 0.18083 26.28 0.05446, 0.16662 90.78 0.17379 0.18075 26.76 27.24 27.72 0.05534| 0 90.98 0.17372 0.05621 0.16648 91.18 0.17365 0.05708 0.16640 91.37 0.17358 0.18068 0.18061 0.18054 28.21 0.05795 0.16632 91.57 0.17351 0.18047 28.70 0.05882 0.16624 91.77 0.17344 0.18040 29.19 0.05969 0.16616| 91.97 0.17337 0.18033 29.68 30.18 i 0.06056] 0.16608 92.16 0.17330 0.06143 0.166001 92.36 5.17322 5 0.18026 0.18018 30.67 1 0.06230 0.16592 92.55 0.17315 S 0.18011 31.16 i 0.06316 0.16584 92.75 3.17308 5 0.18004 31.65 8 0.06403] 0.165761 92.93 0.17301 9 0.17998 40 Chapter 2. Refrigerants and Air Drying Agents Table 3. Properties of Dichlorodifluoromethane (Ft*)--Continued Sat. Temp. F Abs Press. Lb fes SqIn. Volume Liquid Vapor Heat Content and Entbopt Taken From --40 F Heat Content liquid Vapor Entropy Liquid Vapor 25 F Superheat 50 F Superheat Ht Ct. Entropy Ht. Ct Entropy 104 139.0 0.0128 0.302 32.15 88.95 0.06490 0.16568 93.11 0.17294 97.32 0.17993 106 108 110 142.8 0.0128 0.293 32.65 89.11 0.06577 0.16560 93.30 0.17288 97.53 0.17987 146.8 0.0129 0.285 33.15 89.27 0.06663 0.16551 93.48 0.17281 97.73 0.17982 150.7 0.0129 0.277 33.65 89.43 0.06749 0.16542 93.66 0.17274 97.93 0.17976 112 154.8 0.0130 0.269 34.15 89.58 0.06836 0.16533 93.82 0.17266 98.11 0.17969 114 158.9 0.0130 0.262 34.65 89.73 0.06922 0.16524 93.98 0.17258 98.29 0.17961 116 163.1 0.0131 0.254 35.15 89.87 0.07008 0.16515 94.15 0.17249 98.48 0.17954 118 167.4 0.0131 0.247 35.65 90:01 0.07094 0.16505 94.31 0.17241 98.66 0.17946 120 171.8. 0.0132 0.240 36.16 90.15 0.07180 0.16495 94.47 0.17233 98.84 0.17939 122 176.2 0.0132 0.233 36.66 90.28 0.07266 0.16484 94.63 0.17224 99.01 0.17931 124 180.8 0.0133 0.227 37.16 90.40 0.07352 0.16473 94.78 0.17215 99,18 0.17922 126 185.4 0.0133 0.220 37.67 90.52 0.07437 0.16462 94.94 0.17206 99.35 0.17914 128 190 .'1 0.0134 0.214 38.18 90.64 0.07522 0.16450 95.09 0.17196 99.53 0.17906 130 194.9 0.0134 0.208 38.69 90.76 0.07607 0.16438 95.25 0.17186 99.70 0.17897 132 199.8 0.0135 0.202 39.19 90.86 0.07691 0.16425 95.41 0.17176 99.87 0.17889 134 204.8 0.0135 0.196 39.70 90.96 0.07775 0.16411 95.56 0.17166 100.04 0.17881 136 209.9 0.0136 0.191 40.21 91.06 0.07858 0.16396 95.72 0.17156 100.22 0.17873 138 215.0 0.0137 0.185 40.72 91.15 0.07941 0.16380 95.87 0.17145 100.39 0.17864 140 220.2 0.0138 0.180 41.24 91.24 0.08024 0.16363 96.03 0.17134 100.56 0.17856 the volume-weight relation on a dry basis may be taken as 50 lb per cubic foot although in the smaller sizes the packed weight may be as much as 64 lb per cubic foot. Silicon Dioxide, (Silica), in a special form obtained by suitably mixing sulphuric acid with sodium silicate, is another solid adsorbent and is commonly called silica gel. Its capillary structure is exceedingly small, so small that its exact structure has to be deduced rather than observed. The gel is available commercially in a "wide variety of sizes of granules ranging from 4 to 300 mesh-. -It has high adsorptive capacity per unit of weight and is non-toxic, may be repeatedly re-activated without practical deterioration. Re-activation may be accomplished at tem peratures of air up to 600 F although it is frequently accomplished with air or other gases at temperatures not over 350 F. Volume of the capillary pores is reported to be from 50 to 70 per cent of the total solid volume. For most estimating purposes the volume-weight relation can be assumed as from 38 to 40 lb per cubic foot on a dry basis. Other substances having properties which make them available as solid adsorbents include lamisilate and charcoal but details of their physical properties are not available. Nature of Adsorption Process Adsorption is accomplished without chemical change between the air and the adsorbent substance. The adsorbent does not go into solution but water vapor is extracted from the air-vapor stream passing through the bed of adsorbent material and is caught and retained in the capillary pores. The exact nature of the process which goes on during adsorption 41