Document xjRvMd0zqVzGNkYaxXwJ51451

HEATINC VENTILATING AIR CONDITIONING GUIDE 1943 Graphical Symbols for Drawings Refrigerating 94. Thermostat (Self Contained) 110. Low Side Float 95. Thermostat (Remote Bulb) 6" 111. Gage 96. Pressurestat . 97. Hand Expansion Valve --dll 112. Finned Type Cool- . ing Unit, Natural , Convection 0 98. Automatic Expansion Valve 99. 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 6- - 102. Evaporator Press. Regu lating Valve, Snap-Ac -(s> tion Valve 103. Compressor Suction Pressure Limiting Valve, 6Throttling Type -^ - 115, Immersion Cooling Unit 116. Ice Making Unit 117. Heat Interchanger 118. Condensing Unit, Air Cooled 119. Condensing Unit, Water Cooled --[jj [j]-- 1---- 1 (''S 1--> --l. I W I >--v-- 104. Hand Shut Off Valve 105. Thermal Bulb , -dJ<] 120. Compressor 8 106. Scale Trap -Q- 121. Cooling Tower 107. Dryer . . .. 108. Strainer 109. High Side Float -ms- 122. Evaporative Con denser 123. Solenoid Valve 124. Pressurestat With High Pressure CutOut 860 CHAPTER 48. ABBREVIATIONS, SYMBOLS, STANDARDS Materials Table 1. Specific Heat of Solids Temperature F Specific Heat Authority Brickwork- -........................-.................... Carbon (Graphite) -- --..................... 32 32 57-208 68-2370 80-212 68-208 _________ 104-1637 Fire Clay Brick.- ------ Flint .... ................................................... Gold. ... Gypsum ...................................................... Ice-- .. ..... ....................................... Iron, Pure- ............................... -............ Iron, Wrought----- ------------------------------ Nickel--. ............... ........................... Masonry ........................................... Plaster.... .................................................... Platinum. .................... -................ Rocks Gneiss......................:....-......................... Granite.... ........ ................................ Limestone-............................................... Marble....................................................... Silver--................................................. . . Sulphur......................................................... Tin-............................................................. Woods (Average) ............................. Zinc....................... ........- ...... 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 S S S S s s H I H H H S I s s S H S s .. s . .. M. H HS S H H S S S S s s s H s .sI s ............ -S ... Table 2. Specific Heat of Liquids Liquid Temperature F Specific Heat Petroleum____............................................. Sea Water -- * fip r.r 1 0043 Rp C,r 1 0468 . 32 59-68 59-122 360 68 70-136 64 64 59 0.548 0.601 0.576 0.041 0.03325 0.511 0.980 0.903 1.000 Authority S ............S ... s ------H ss... . . s s .s . i Table 3. Specific Heat of Gases and Vapors Substance Temperature F Specific Heat at Constant ' Pressure Ratio of . Specific Heat . Cp/CV Specific Heat at Constant Volume (Computed) Authority Air Ammonia ........................... Garbon Dioxide.... ............ Carbon Monoxide. ......... Coal Gas-................................ Flue Gas.- .................. -- Hydrogen. . ____ Nitrogen____ _ '_____ Oxygen.............. ................... Water Vapor . . Water Vapor_______________ 5 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 0.169 1.277 0.419 1.3003 0.1668 1.395 0.1736 ___ . . 1.419 2.402 .1.41 0.1729 1.3977 0.155 1.305 0.322 -------- ---- ------- .S s Ss "S'- H s s s s s. Notes: When one 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 and AV C. "Willard; M--Engineers' Handbook, Dy Lionel S. Marks. 861