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Heating Ventilating Air Conditioning Guide 1938 Table 7. Dew-Point of Air in Equilibrium with Lithium Chloride Solutions Concentration in gram mols of Lithium Chloride per 1000 Grains Water 0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0 16.0 18.0 20.0 22.0 24.0 26.0 28.0 30.0 320 315.2 308.7 299.9 290.2 279.7 269.4 259.6 251.5 244.1 236.5 230.0 223.8 218.6 214.5 210.3 300 295.4 289,1 280.5 270.9 260.6 250.5 240.8 232.6 225.4 218.C 211.8 205.8 1200.8 196.9 192.8 280 275.6 269.5 261.1 251.7 241.5 231.6 222.2 214.C 206.7 199.7 193.5 187.8 183.2 179.3 175.2 260 255.8 250.0 241.9 232.6 222.7 212.8 203.5 195.5 188.4 181.7 175.4 170.0 165.6 162.0 158.4 240 236.0 230.4 222.5 213.5 203.8 194.2 185.0 177.1 170.C 163.6 157.5 152.2 148.3 144.6 140.5 220 216.2 210.8 203.2 194.4 184.9 175.5 166.4 158.6 151.6 145.3 139.6 134.6 130.7 127.3 124.2 200 196.4 191.2 183.9 175.4 166.1 156.7 148.0 140.3 133.5 127.3 121.9 117.0 113.3 110.1 180 176.6 171.6 164.7 146.4 147.3 138.1 129.6 122.1 115.5 109.4 104.2 99.6 96.0 160 156.8 152.1 145.4 137.4 128.6 119.7 111.3 103.9 97.4 91.6 86.6 82.2 140 137.0 132.6 126.1 . 118.4 109.9 101-3 93.1 85.9 79.5 73.8 69.0 120 117.2 113.0 106.8 99.4 91.1 82.7 74.7 67.8 61.5 56.0 110 107.3 103.2 97.2 89.9 81.9 73.5 65.6 58.8 52.6 47.1 100 97.4 93.4 87.5 80.5 72.7 64.4 56.6 49.8 43.7 38.2 90 87.5 83.6 77.9 71.0 63.3 54.2 47.6 40.8 34.8 29-3 80 77.6 73.8 68.4 61.6 54.0 46.1 38.5 31.8 25.9 20.6 70 67.7 64.0 58.7 52.2 44.8 37.0 29.5 22.9 17.2 12.0 60 57.8 54.3 49.1 42.7 35:5 27.9 20.5 14.0 8.3 40 38.0 34.7 29.9 23.9 16.9 9.6 2.4 -3.9 20 15.1 10.7 5.0 -1.7 -8.7 -15.4 0 -4.5 -8.6 -13.9 -20.2 -27.0 -33.3 combined is obtainable from steam tables. For instance, at 60 F the amount of this heat, is about 1057 Btu. In addition to this heat there is involved also the so-called heat of mixing which is frequently. considerable. Temperature-Presisure-Concentration Relations Since the absorption process can continue only as long as there is a difference in vapor pressure between the absorbent and the air-vapor mixture and since at a given temperature of the absorbent the vapor pressure depends on the concentration of the solution, evidently there Table 8. Density of Lithium Chloride Solutions 46 Chapter 2. Refrigerants and Air Drying Agents Table 9. Viscosity of Lithium Chloride Solutions (millipoise) Concentration in Molal TEMP- D Feg 024 68 10 12 14 16 18 20 22 24 -- 56.75 72.44 97.05 136.8 199.5 28.91 37.07 47.42 63.09 15 45 19.91 25.53 32.58 43.05 11.02 14.26 18.37 23.55 30.90 8-61 11.19 14.42 18.62 24.32 6-82 8.89 11.48 14.94 19.36 5 ffi 7.31 9.51 12.30 15.92 4 7n 6 15 8.07 10.42 13.43 4 01 5.25 6.92 8.93 11.51 * dA 4.56 6.01 7.78 10.00 5 05 4.01 5.28 6.86 8.79 ? 77 3.58 4.72 6.14 7.83 ? 45 3.21 4.25 5.50 7.02 7 IQ 2.90 3.84 4.94 6.46 7 00 2.66 3.52 4.51 5.75 L86 2.48 3.28 4.17 5.32 320 1.74 2.32 3.08 3.89 4.94 84.94 123-3 178.6 58.48 81.10 116.1 165.6 41.40 56.62 79.80 111.2 156.3 32.28 43.45 60.26 82.04 113-8 25.59 33.96 46.13 61.52 84.72 118.3 20.99 27.67 36.64 48.31 65.77 89.95 17.66 22.96 30.06 38.99 52.48 71.12 95.94 15.00 19.36 25.06 32.14 42.76 56.89 75.86 106.2 12.91 16.56 21.28 27.10 35.48 46.45 60.67 84.33 11.22 1432 18.28 23.12 29.92 38.55 50.70 67.92 9.93 12.59 16.00 20.14 25.64 32.96 43.05 56.49 8.83 11.12 14.09 17.62 22.18 28.31 36.98 47.42 7.91 9.91 12.47 15.50 1936 24.60 31.92 40.55 7.19 8.97 11.27 14.00 17.22 21.78 28.05 35.56 6.67 8.28 10.38 12.82 15.70 19.68 25.12 31.92 6.19 7.73 9.64 11.86 14.45 18.03 22.80 29.11 must be a relation between these quantities which if known would state the limits of the process. The relationship would also depend on the absorbent being used, and would have to be determined for each substance used as an absorbent. Fig. 2 shows this relationship graphically for lithium chloride. It will be noted that this chart is essentially similar to that shown in Fig: 1 and its direct usefulness is limited by much the same considerations. In order to permit numerical calculations of air conditioning problems it is desirable to have tables for use instead of a chart like Fig. 2, and Tables 7, 8, 9 and 10 can be used in making calculations for lithium chloride. Table 10. Properties of Lithium Chloride Solutions Concentration Mols (42.4 (hums LiCl per 1000 Gra<n3 Water) Partial Heat op Mixing at 0 F BTU PER LB Temperature Coef. op Partial Heat BTUop Mixing per Flb per Specific Heat at 70 F Boiling Point F (at 760 MM Ho) Freezing Point 0 o.o 0.0 0.998 212.0 32 2 2.04 -0.014 0.901 215.8 16.3 4 7.24 -0.036 0.831 221.5 ' -5.8 6 16.7 -0.069 0.778 228.9 -34.2 8 31.9 -0.109 0.739 238.1 -69 10 51.1 -0.143 0.710 248.4 -90 12 75.7 -0.160 0.687 258.8 -40 14 90.8 -0.167 0.666 268.9 1 16 124.8 -0.176 0.647 277.9 36.5 18 145 -0.186 0.631 285.8 58.1 20 162 -0.194 0.617 293.2 86.4 22 171 -0.20 0.604 300.2 1-33 24 177 -0.20 0.59 307 156 26 182 -0.21 0.58 313 180 28 191 --0.21 0.575 318 190 30 194 -0.21 0.57 323 195. 32 198 -0.22 0.56 328 280 Substance that First Separates Out on Freezing Ice Ice Ice Ice ( Ice Ice LiCl-ZH> LiCISHiO UCVM& LiCUlHf) LiCl-HiO LiClrH-f) LiCl-HiO LiCLB-0 LiCl-lW LiCl-Ht0 " LiCl 47 X