Document qmbeG4Qk3vedvx2JjMp9nbxMk

HEATING VENTILATINC AIR CONDITIONING GUIDE 1944 Graphical' Symbols for Drawings 94. Thermostat (Self Contained) 0 110. Low Side Float 95. Thermostat (Remote Bulb) 111. Gage 96. Pressurestat 97. Hand Expansion Valve --dZJ 112. Finned Type Cool ing Unit, Natural Convection Refrigerating 98. Automatic Expansion Valve 39. Thermostatic Expansion Valve ' 113. Pipe Coil 114. Forced Convection <" Cooling Unit 100. Evaporator Press. Regu lating Valve, Throttling Type 101. Evaporator Press. Regu lating. Valve, Thermo static Throttling Type 102. Evaporator Press. Regu lating Valve, Snap-Ac tion Valve 103. Compressor Suction Pressure LimitingValve, -R>-Throttling Type 104. Hand Shut Oil Valve 115. Immersion Cooling , Unit 116. Ice Making Unit 117. Heat Interchanger 118. Condensing Unit, ~A l==! r"S Air Cooled Q 119. Condensing Unit, Water Cooled" - --<O5~~11 s(J\L_ .J 105. Thermal Bulb 120. Compressor 106. Scale Trap -0- 121, Cooling Tower 107. Dryer 108. Strainer 109. High Side Float -CZ3122. Evaporative Con denser 123. Solenoid Valve 124. Pressurestat With High Pressure Cut- --I Tpl--i_ Out * I r~ 830 CHAPTER 48. ABBREVIATIONS, SYMBOLS, STANDARDS Table 1. Specific Heat of Solids3 Materials Alloys Brass, Red.............................................. Brass, Yellow......................... ................ Bronze (80Cu, 2QSn). ....................... Monel Metal--.................................... Asbestos............................ ........................ Carbon (Graphite) ..........._............ 1 C/iIr* Concrete._______ --._____ _--................ Copper- . .. ................................... Fire Clay Brick __ . ........ ................ Glass f?mtgn VI inf ...... ........ .. ............................. . Gold ......... - ........... -................ Iron, Pure _____ -- - .'. ..................... Iron, Pure____-.......... ~.......-................... Iron, Cast.................. _ ..................... Iron, Wrought........... .................................. Nickel........ ............................................. Masonry.... .......... - ...................-....... Platinum.. ............-................................ Rocks - Granite......... .... ...... ........... .......... Limestone...... ....... ........... ........... ........... Marble. ............................ -............... Sandstone--- ........-........................... Steel . .................... Sulphur .. - ....... ..................................... Silica Brick. ... ................................. Tin__ . -....................- . Woods (Average) ............. 7.inc ............... - Temperature F 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 Specific Heat Authority 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 0.11890.1152 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 , 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 s H s I S S s Table 2. Specific Heat of Liquids Liquid Alcohol, Ethyl-- ..... . -- Alcohol. Methyl ................................. Glycerine. ,, ..... ......-............... Lead (Molten)......................... ................. Mercury . -- ...................... Petroleum-___ ... -........... - Sea Water Sp. Gr, 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 Table 3. Specific Heat of Gases and Vapors Authority S S S H ; *. S s s s s -- Substance Temperature F Specific Heat at Constant Pressure Ratio of Specific Heat Cp/C, Specific Heat ' at Constant Volume (Computed) Authority Air Ammonia ............. - ___ Carbon Dioxide ..... ... Carbon Monoxide_____ ____ Flue Gaa ~ _ Hydrogen. Nitrogen_____ Oxygen--................................. . Water Vapor- .................. Water Vapor ... ,. 32-392 80-392 52-417 79-388 68-1900 1 70-212 32-392 55-404 212 356 0.2375 0.5356 0.2169 0.2420 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 0.1736 2.402 * 0.1729 0.155......... 0.322 -- S S S s s H s s --s- s s See also The Specific Heat of Thermal Insulating Materials, by Gordon B. Wilkes and Carl O. Wood (A.S.H.V.E. Transactions. VoL 48, 1942, p. 493). Notes: Whenone temperature is given the true specific heat is given, otherwise the value is the mean specific heat between the given limits. , Authorities: S--Smithsonian Physical Tables, 1933: I--International Critical Tables; H--Heating, Ventilation and Air Conditioning, by L. A. Harding ana A. C. Willard; M--Engineers' Handbook, by Lionel S, Marks. ............. 831