Document jyQzpEK1OmE573GqQqnjMw6pk

Heating Ventilating Air Conditioning Guide 1938 Chapter 2. Refrigerants and Air Drying Agents Table 4. Properties of Methyl Chloride Table 4. . Properties of Methyl Chloride--(Continued) Sat. Temp. F Ass Press. Lb peb Sq In. Volume Liquid . Vapor --40 FHeat Content and Entbopt Taken From Heat Content Entropy 100 F Superheat 200 F Superheat liquid Vapor Liquid Vapor HtCt Entrop f Ht. Ct Entropy Sat. Temp. F Abb Press. Lb per Sq In. Volume liquid Vapor Heat Content and Entbopt Taken From --40 F Heat Content Entropy 100 F Superheat 200 F Superheat liquid Vapor liquid Vapor Ht Ct. Entropy Ht Ct Entropy I i 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 8o 88 90 92 94 96 . 98- 100 102 18.7; 0.0162 19.6(> 0.0162 20.41 0.0163 20.91 0.0163 21.3^ 0.0163 'L'L.'SA 0.0164 23.3C 0.0164 24.38 0.0164 25.46 0.0164 26.55 0.0165 27.63 0.0165 28. i 1 0.0166 29.98 0.0166 31.25 0.0166 32.53 0.0167 33.80 0.0167 35.07 0.0168 36.55 0.0168 38 .U3 0.0169 39.51 0.0169 40.99 0.0169 41.73 0.0170 42.47 0.0170 43.33 0.0170 44.18 0.0171 45.89 0.0171 4/ .61 0.0171 '49.32 0.0172 51.03 0.0172 53.00 0.0172 54.97 0.0173 56.94 0.0173 58:91 0.0173 60.88 0.0174 63.13 0.0174 65.3/ 0.0174 67.62 0.0175 69.86 0.0175 72.11 0.0176 74.66 0.0176 77.21 0.0177 79.76 0.0177 82.31 0.0178 84.8o 0.0178 fi/ . 0.0178 90.62 0.0179 93.50 0.0179 96.38 0.0180 99.26 0.0180 102.49 0.0180 105.72 0.0181 108.94 0.0181 112.17 0.0182 115.40 0.0182 19.00 0.0183 5.052 4.856 4.661 4.563 4.476 4.303 4.129 3.984 3.839 3.693 3.548 3.403 3.288 3.172 3.057 2.941 2.826 2.734 2.642 2.549 2.457 2.411 2.365 2.328 2.290 2.216 2.141 2.067 1.992 1.931 1.870 1.810 14.4 192.410.0328! 0.419' 215.6 0.46' 237.; 0 507 15.1 193. 0.034" 0.4196 216.2 0.466> 237.; 0 505 15.8 193.1 0.036C 0.4198 216.7 0.468 238.2 0 504 16.2 16.6 194. 0.0368 0.4198 :217.C 0.464l 238.1 0 503 194.` 0.0376 0.4194 217.3 0.464[ 238 0 502 17.3 18.1 195.: 0.039: 0.4195 217.9 0.463 239 4 0 501 195.8 0.0407 0.4192 218.5 0.463 240 C 0 500 18.8 19.6 196.3 0.0421 0.4184 219.0 0.462 240.5 0 499 196.7 0.0439 0.4176 219.5 0.462 241 C 0 408 20.3 197.2 0.0454 0.4168 220.0 0.461 241.5 0 408 21.1 21.8 197.6 0.0472 0.4160 220.5 0.461 242.0 0 497 198.1 0.0486 0.4152 221.0 0.460 242.5 0 496 22.5 198.5 0.0501 0.4148 221.5 0.459 243 0 0 495 23.3 198.9 0.0516 0.4143 222.0 0.459 243 6 0 495 24.0 199.3 0.0532 0.4139 222.4 0.458 244 1 0 494 24.8 199.7 0.0547 0.4134 222.9 0.458 244 7 0 494 25.5 200.1 0.0562 0.4130 223.4 0.457 245 2 0 493 26.2 200.5 0.0577 0.4124 223.9 0.456 245 7 0 492 27.0 200.9 0.0592 0.4118 224.3 0.455 246 2 0 492 27.7 201.4 0.0607 0.4111 224.8 0.455 246 7 0 491 28.5 28.8 29.2 201.8 0.0622 0.4105 225.2 0.454 247.2 0 491 202.0 0.0629 0.4102 225.5 0.453 247.4 0 490 202.2 0.0637 0.4099 225.7 0.453 247.7 0 490 29.6 29.9 202.4 0.0644 0.4096 225.9 0.453 248.0 0 490 202.6 0.0651 0.4093 226.1 0.452 248.3 0 489 30.7 203.0 0.0666 0.4087 226.6 0.451 248.8 0 489 31.4 203.3 0.0680 0:4081 227.0 0.451 249.4 0 488 32,2 203.7 0.0695 0.4075 227.5 0.450 249 9 0 488 32.9 204.1 0.0709 0.4069 227.9 0.449 250.5 0 487 33.7 204.4 0.0724 0.4063 228.2 0.448 251 0 0 486 34.4 35.2 204.7 0.0739 0.4056 .205.1 0.0754 0.4050 228.6 228.9 0.448 0.447 251.5 252 0 0 486 0 485 1.749 35.9 205.4 0.0769 0.4043 229.3 0.447 252 5 0 485 1.688 1.638 1.588 1.539 1.489 1.439 36.7 37.4 38.2 38.9 39.7 40.4 205.7 0.0784 0.4037 229.6 0.446 253.0 0 484 206.0 3.0798 0.4030 229.9 0.445 253.5 0 483 206.3 3.0812 0.4024 230.3 0.444 254.0 0 483 206.6 3.0827 0.4017 230.6 0.443 254 5 0 482 206.9 3.0841 0.4011 231.0 0.442 255.0 0 487 207.2 3.0855 0.4004 231.3 0.441 255.5 0 481 1.398 41.1 1.357 41.9 1.315 42.6 1.274 43.4 1.233 44.1 1.199 44.8 1.165 45.6 1.130 46.3 1.096 47.1 1.062 47.8 1.033 48.6 1.005 49.3 0.9764 50.1 0.9478 50.8 0.9193 51.6 0.8952 52.3 207 .i 3.0869 0.3998 231.6 0.440 256.0 0 480 207.7 3.0883 0.3992 232.0 0.439 256.5 0 480 208.0 3.0898 0.3985 232.3 0.439 256 9 0 470 208.2 3.0912 0.3979 232.7 0.438 257 4 0 479 208.5 3.0926 0.3973 233.0 0.437 257.9 0 478 208.7 3.0940 0.3967 233.3 0.436 258.4 0 478 209.0 3.0953 0.3960 233.6 0.435 258.9 0 477 209.2 3.0967 3.3954 233.9 0.435 259.4 0477 209.5 3.0980 3.3947 234.2 0.434 259.9 0 476 209.7 3.0994 3.3941 234.5 0.433 260.4 0 476 209.9 3.1008 3.3935 234.8 0.433 260 8 0 476 210.21 3.102213.3929 235.1 0.432 261 2 0 475 210.4(3.103513.3922 235.4 0.432 261 6 0 475 210.71 1.104913.3916 235.7 0.431 262 0 0 474 210.9i 11063 3.3910 236.0 0.431 262 4 0 474 211.1 (3.1076 63.3903 236.4 0.430 262.8 0.474 104 122.60 0.0183 106 126.20 0.0184 108 129.80 0.0184 110 133.40 0.0185 112 137.42 0.0185 114 141.44 0.0185 116 145.46 0.0186 118 149.48 0.0186 120 . 153.-50 0.0187 0.8712 53.1 0.8471 53.8 0.8231 54.6 0.7990 55.3 0.7786 56.1 0.7583 56.8 0.7379 57.6 0.7176 58.3 0.6972 59.1 211.3 0.1090 0.3897 236.8 0.430 263.2 0.473 211.4 0.1103 0.3890 237.1 0.429 263.5 0.473 211.6 0.1117 0.3884 237.5 0.429 263.9 0.472 211.8 0.1130 0.3877 237.9 0.428 264.3 0.472 212.0 0.1144 0.3871 238.1 0.427 264.6 0.471 212.2 0.1157 0.3864 238.3 0.427 264.8 0.470 212.4 0.1171 0.3858 238.6 0.426 265.1 0.470 212.6 0.1184 0.3851 238.8 0.426 265.3 0.469 212.8 0.1198 0.3845 239.0 0.425 265.6 0.468 is not known but it is stated that the action is brought about by surface condensation, and also by a difference between the vapor pressure of the water condensing inside the pores and the partial pressure of the water vapor in the air-vapor mixture. The adsorbing process in the bed can continue until the vapot.pressures come into equilibrium. The amount of vapor adsorbed will depend on the adsorbent substances being used but for any single substance the amount depends on the temperature of the bed as well as on the partial pressure of the air-vapor mixture being passed over it. As the process of adsorption goes on heat is liberated in the bed. The heat so liberated is the latent heat of the water vapor condensed together with the so-called heat of wetting. For a pound of water vapor at 60 F the latent heat released by condensation is approximately 1057 Btu. -The heat of wetting for silica gel, for example, is about 200 Btu, making a total heat of adsorption of approximately 1257 Btu pier pound of water adsorbed from the air-vapor mixture passing through the silica gel bed. The heat of wetting varies with the substance being used as the adsorbent while the latent heat of condensation depends only on the temperature and pressure of the water vapor. Temperature-Pressure-Concentration Relations Since the adsorptive ability of an adsorbent depends on the temperature of the bed and on the partial pressure difference between the pores and the air-vapor mixture it is important to know the pressures and temperatures at which pressure equilibrium is reached. Evidently the equilibrium conditions represent the limits beyond which adsorption of vapor cannot continue. The relationship can be shown graphically and Fig. 1 is such a chart for silica gel. Charts of like nature can be plotted for other adsorbent materials. Fig. 1 shows the equilibrium conditions for a gel bed maintained at constant temperature while the water vapor adsorption is allowed to continue until pressure equilibrium is reached. Each curve on the chart show a certain dew-point temperature, and therefore a certain pressure, of the saturated water vapor. 42 43