Document Vk5jvqNj3GnOz04x42bgk2GN

heating ventilating air CONDITIONING GUIDE 1941 Graphical Symbols for Drawings Heating and Ventilating 75. Heat Transfer Surface, Plan 76. Wall Radiator, Plan 77. Wall Radiator on Ceiling, Plan i-i-: I ...I .1 j \ZD 78. Unit Heater (Propeller), Plan 79. Unit Heater (Centrifugal Fan), Plan 80. Unit Ventilator, Plan Traps 81. Thermostatic 82. Blast Thermostatic 83. Float and Thermostatic 84. Float 85. . Boiler Return Valves 86. Reducing Pressure 87. Air Line 88. Lock and Shield 89. Diaphragm 90. Air Eliminator 91. Strainer 92. Thermometer 93. Thermostat O => e _fl_ CHAPTER 46. TERMINOLOGY Materials illys ,, . Brass, Red-.................. Brass, Yellow--........... Bronze (SWT**, 20),, Monel Metal................ \ltiminunL-....................... Asbestos....... ................... Brickwork-..................... Carbon (Graphite)-....... Coal------ ----- ------.......... Coke.--.... --.................... Concrete..................... ...... Copper.... .......................... Fire Clay Brick............... Glass Crown...... ..................... Flint.............................. i. Pure.......... i. Pure.......... i, Cast.......... l. Wrought- mite-----lestone.. it--.................... Brick._____ i (Average).. Table 1. Specific Heat of Solids Temperature F Specific Heat 32 32 57-208 68-2370 80-212 68-208 104-1637 64-212 77-1832 50-122 50-122 64 32 -40 32 32-600 68-212 59-212 32 32 58-212 63-210 54-212 59-212 32-212 32 240-320 77-1832 77 68 32 .0.0899 0.0883 0.0862 0.127 0.212 0.195 0.195 0.314 0.278 0.201 0.270 0.0928 0.258 0.161 0.117 0.0312 0.259 0.487 0.434 0.1043 0.127 0.1189 0.1152 0.0297 0.1032 0.2159 0.2 0.0319 0.196 0.192 0.216 0.21 0.22 0.0536 0.1175 0.220 0.263 0.0548 0.327 0.0913 Authority S S S S s s H I H H H S I S s s H s s s M H H S S H H S S s s s s H s I s s s Liquid Alcohol. Ethyl.......................................... .. Sea Water Sp. Gt. 1.0043. ..................................... Sp. Gr. 1.0463.... ..................................... Water........................ -.................................. Temperature F 32 59-68 59-122 360 68 70-136 64 64 59 Specific Heat 0.548 0.601 0.576 0.041 0.03325 0.511 0.980 0.903 1.000 Authority S S s s s s s Substance Table 3. Specific Heat of Gases and Vapors Temperature F Specific Heat at Constant Pressure Ratio of Specific Heat Cp/Cv Specific Heat at Constant Volume (Computed) Authority Air Nitfnppn Water Vapor ......................... 32-392 80-392 52--417 79-388 68-1900 70-212 32-392 55-404 212 356 0.2375 0.5356 0.2169 0.2426 0.3145 0.24 (Approx.) 3.41 0.2438 0.2175 0.421 0.51 1.405 1.277 1.3003 1.395 1.419 1.41 1.3977 1.305 ....... -- 0.169 0.419 0.1668 0.....1..7...36 2.402 0.155 0.322 -S S H S specific heat between the given limits. . ,__T,,t.rnational Critical Tables; H--Heating. Authorities: S--Smithsonian Physical ^blra,19M, I c vraiard; M--Engineers' Handbook, by Ventilation and Air Conditioning, by L. A. Harding ana A. c. wunuu, Lionel S.'Marks. 807