Document omNeEjyKNpQ1Rv2q18Dn7BrB8

American Society of Heating and Ventilating Engineers Guide, 1934 of the liquid or sensible heat. When more heat is added, the water begins to evaporate and expand at constant temperature until the water is entirely changed into steam. The heat thus added is known as the latent heat of evaporation. Table 4. Thermal Properties of Water Temperature Deo F 32 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180. 190 200 210 212 220 240 260 280 300 350 400 450 500 550 600 700 Sat. Press. Lb per Sq In. 0.0887 0.1217 0.1780 O'. 2561 0.3628 0.5067 0.6980 0.9487 1.274 1.692 2.221 2.887 3.716 4.739 5.990 7.510 9.336 11.525 14.123 14.696 17.188 24.97 35.43 49.20 67.01 134.62 247.25 422.61 681.09 1045.4 1544.6 3096.4 CVolume u Ft per Lb 0.01602 0.01602 0.01602 0.01603 0.01605 0.01607 0.01610 0.01613 0.01616 0.01620 0.01625 0.01629 0.01634 0.01639 0.01645 0.01650 0.01656 0.01663 0.01669 0.01670 0.01676 0.01690 0.01706 0.01723 0.01742 0.01797 0.01865 0.0195 0.0205 0.0219 0.0241 0.0394 Weight Lb peb Cu Ft 62.42 62.42 62.42 62.38 62.31 62.23 62.11 62.00 61.88 61.73 61.54 61.39 61.20 61.01 60.79 60.61 60.39 60.13 59.92 59.88 59.66 59.17 58.62 58.04 57.41 55.65 53.62 51.3 48.8 45.7 41.5 25.4 * Spbcipic Heat 1.0093 1.0048 1.0015 0.9995 0.9982 0.9975 0.9971 0.9970 0.9971 0.9974 0.9978 0.9984 0.9990 0.9998 1.0007 1.0017 1.0028 1.0039 1.0052 1.0055 1.0068 1.0104 1.0148 1.020 1.026 1.044 1.067 1.095 1.130 1.200 1.362 PROPERTIES OF STEAM Steam is water vapor which exists in the vaporous condition because sufficient heat has been added to the water to supply the latent heat of evaporation and change the liquid into vapor. This change in state takes place at a definite and constant temperature which is determined solely by the pressure of the steam. The volume of a pound of steam is the specific volume which decreases as the pressure increases. The reciprocal of this, or the weight of steam per cubic foot, is the density. (See Table 5). Steam which is in contact with the water from which it was generated is known as saturated steam. If it contains no actual water in the form of mist or priming, it is called dry saturated steam. If this be heated and the pressure maintained the same as when it was vaporized, its temperature will increase and it will become superheated, that is, its temperature will 582 Chapter 41--Properties of Air, Water and Steam Table 5. Properties of Saturated Steam: Pressure Table3 Abs. Press. Temp. Lb./Sq. In. De#. F. P Vi" Hr 3A" Hg 1"Hr iwhr 2"Hg aw Hr 3" Hr t 58.83 70.44 79.06 91.75 101.17 108.73 115.08 Specific Volume Sat. Liquid Evap. Sat. Vapor Vf Vfe 0.01603 1256.9 0.01605 856.5 0.01607 652.7 0.01610 4453 0.01613 339.5 0.01616 2752 0.01618 2312 1256.9 856.5 652.7 4453 339.5 2752 2312 Total Heat Sat. Sat. Liquid Evap. Vapor hi hf* ht 2628 38.47 47.06 59.72 69.10 76.63 82.96 1058.8 1052. S 10473 1040.8 1035.7 1031.5 1027.9 1085.7 1091.0 1094.9 1100.6 1104.8 1108.1 11103 1.0 101.76 2.0 126.10 3.0 141.49 4.0 152.99 0.01614 0.01623 0.01630 0.01636 3332 173.94 118.84 90.72 333.9 173.96 11826 90.74 69.69 93.97 10933 12023 10353 1021.6 1012.7 1005.9 11052 1115.6 11222 11262 5.0 162.25 6.0 170.07 7.0 176.85 8.0 182.87 9.0 188.28 0.01641 0.01645 0.01649 0.01652 0.01656 73.59 62.03 53.68 4738 42.42 73.61 62.05 53.70 4739 42.44 130.10 1000.4 137.92 9952 144.71 991.7 150.75- 988.1 156.19 9842 1130.6 1133.7 1136.4 1138.9 11412 10.0 11.0 12.0 13.0 14.0 14.696 193.21 197.75 201.96 205.88 209.56 212.00 0.01658 0.01661 0.01664 0.01666 021669 0.01670 38.44 35.1S 32.40 30.06 28.05 26.80 38.45 35.17 37.42 30.08 28.06 2622 161.13 165.68 169.91 17325 177.55 180.00 9812 1143.0 979.1 11442 976.5 1146.4 974.1 1147.9 9713 11493 9702- 11502 16v0 18.0 20.0 22.0 24.0 26.0 28.0 21632 222.40 227.96 233.07 237.82 242.25 246.41 0.01673 0.01678 0.01682 0.01685 0.01689 0.01692 0.01695 24.75 22.16 20.078 18363 16.924 15.701 14.647 24.76 22.18 20.095 18380 16.941 15.718 14.664 18435 190.48 196.09 201.25 206.05 210.54 214.75 967.4 1151.8 963.5 11S4.0 959.9 1156.0 956.6 1157.8 953.4 11593 9S0.4- 1161.0 947.7 1162.4 30.0 32.0 34.0 36.0 38.0 2S034 254.05 257.58 260.94 * 264.16 0.01698 0.01701 0.01704 0.01707 0.01710 13.728 12.923 12209 11.570 10.998 13.745 12.940 12226 11.587 11.015 218.73 222.50 226.09 22921 232.79 945.0 942.5 9402 937.7 935.5 1163.7 116S.0 1166.1 11672 11683 40.0 42.0 44.0 46.0 48.0 26734 27021 273.06 27S.81 278.45 0.01712 0.01715 0.017170.01719 0.01722 10.480 10.010 9.582 9.189 8229 10.497 10.027 9.599 9207 8.846 235.93 238.95 24126 244.67 247137 9333 9312 9292 9272 925.4 11692 11702 1171.1 1171.9 1172.7 60.0 62.0 64.0 66.0 68.0 281.01 283.49 285.90 288.23 290.50 0.01724 0.01726 0.01728 0.01730 0.01732 8.496 8.189 7.902 7.636 7388 8.514 8.206 7.919 ` 7.653 7.405 249.98 252.52 254.99 25738 259.71 923.5 921.7 920.0 9183 916.6 11733 11743 11752 1175.7 1176.4 60.0 292.71 0.0173S 62.0 294.85 . 0.01737 64.0 296.94 0.01739 66.0 . 298.98 0.01741 68.0 300.98 0.01743 7.155 6.937 6.732 6.539 6357 7.172 6.95S 6.749 6.556 6375 261.98 264.18 26633 268.43 270.49 915.0 913.4 911.9 910.4 908.9 1177.0 1177.6 11782 11782 1179.4 70.0 72.0 74.0 76.0 78.0 302.92 304.82 306.68 308.50 31028 0.01744 0.01746 0.01748 . 0.01750 0.01752 . 6.186 6.024 5270 5.723 5.584 6203 6.041 5.887 5.741 5.602 272.49 274.45 27637 27825 280.09 907.4 906.0 904.6 903.2 901.9 1179.9 1180.5 1181.0 1181.5 1182.0 80.0 82.0 84.0 86.0 88.0 312.03 313.74 315.42 317.06 318.68 0.01754 0.017S6 0.01757 0.01759 0.01761 5.452 5325 5.204 5.089 4.979 5.470 5343 5222 5.107 4.997 281.90 283.67 285.42 287.13 288.80 900.5 8992 897.9 896.7 895.4 1182.4 1182.9 1183.4" 1183.8 11842 90.0 92.0 94.0 96.0 98.0 32027 321.83 32337 32428 32637 0.01763 4.874 0.01764 . . 4.773 0.01766 ' 4.676 0.01768 4.584 0.01769 4.494 4292 4.791 4.694 4.602 4.512 290.45 292.07 293.67 29525 196.80 8942 893.0 8912 890.6 889.4 1184.6 1185.0 1185.4 11853 11862 Entropy Sat. Sat. Abe. Frees. Liquid E..p, Vapor Lb./Sq. In. SI 8fg 8g P 02533 2.0422 2.0955 02754 1.9856 2.0609 0.0914 1.9451 2.0365 %"Hg W'Bg l'Hg 0.1147 1.8877 2.0024 IWHr 0.1316 1.8468 1.9784 2" Hg 0.14S0 1.8148 1.9598 2W Hr 0.1561 1.7885 1.9446 3*Hg 0.1326 0.1750 02009 0.2198 1.8442 1.7442 1.6847 1.6420 1.9769 1.9192 1.8856 1.8618 1.0 2.0 3.0 4.0 0.2348 02473 0.2580 02674 02758 1.6088 1.5814 1.5582 1.5379 1.5200 1.843S 1.8287 1.8162 1.8053 1.7958 6.0 6.0 7.0 6.0 9.0 02834 02903 02968 03027 03082 03119 1.5040 1.4894 1.4750 1.4636 1.4S21 1.4446 1.7874 1.7797 1.7727 1.7663 1.7604 1.7564 10.0 11.0 12.0 13.0 14.0 14.696 03184 03274 033S6 03431 03500 03564 03624 1.4312 1.4127 13960 13809 13670 13542 13422 1.7496 1.7402 1.7317 1.7240 1.7170 1.7106 1.7046 16.0 16.0 20.0 22.0 24.0 26.0 28.0 03680 03732 03783 03830 03876 13310 13206 13107 13014 13925 1.6990 1.6938 1.6890 1.6844 1.6800 30.0 32.0 34.0 36.0 38.0 03919 03961 0.4000 0.4039 0.4076 13840 13759 13682 1.2608 13537 1.6759 1.6720 1.6683 1.6647 1.6613 40.0 42.0 44.0 46.0 48.0 0.4111 0.4145 0.4178 0.4210 0.4241 1.2469 13404 1.2340 1.2279 13220 1.6580 1.6549 1.6518 1.6489 1.6461 60.0 62.0 64.0 66.0 68.0 0.4271 0.4300 0.4329 0.4356 0.4384 13162 1.2107 1.2053 13001 1.1950 1.6434 1.6407 1.6382 1.6357 1.6333 60.0 62.0 64.0 66.0 68.0 0.4410 0.4435 0.4460 0.4485 0.4509 1.1900 1.1852 1.180S 1.1759 1.1714 1.6310 1.6287 1.6265 1.6244 1.6223 . 70.0 72.0 74.0 76.0 78.0 0.4532 0.4555 0.4578 0.4599 0.4621 1.1670 1.1627 1.1586 1.1545 1.150S 1.6202 1.6182 1.6163 2.6144 1.6126 80.0 82.0 84.0 86.0 88.0 0.4642 0.4663 0.4683 0.4703 0.4723 1.1465 1.1427 1.1389 1.13S2 1.1316 1.6107 1.6090 1.6072 1.6055 1.6038 90.0 92.0 94.0 96.0 98.0 Abstracted from Steam Tables and Mollier Diagram, by Prof. J. H. Keenan, 1930 edition, by permission of the publisher. The American Society of Mechanical Engineers, 583