Document NzdqKxxZLvKLyb6vJb0Dx8OV

804 Chapter 48 ' 1945 Guide -Graphical Symbols for Drawings Refrigerating 94. Thermostat (Self Contained) . 110. Low Side Float 95. Thermostat (Remote Bulb) 111. Gage 96. Pressurestat 97. Hand Expansion Valve -- |--| P | 112. Finned Type Cool ing Unit, Natural Convection 98. Automatic Expansion Valve 113. Pipe Coil D C D 99. Thermostatic Expansion Valve 114. Forced Convection Cooling Unit 100. Evaporator Press. Regulating Valve. Throttling Type ___ \ 101. Evaporator Press. Regu- ,--, lating Valve, Thermo- static Throttling Type ~\^)------ 102. Evaporator Press. Regu- lating Valve, Snap-Action Valve r~--i (g) I-- '--' 103. Compressor Suction i---a Pressure Limiting Valve, I r\ Throttling Type 115. Immersion Cooling Unit 116. Ice Making Unit 117. Heat Interchanger 118. Condensing Unit, Air Cooled 119. Condensing Unit, Water Cooled 6 6- = - M&T -fil 6_ 104. Hand Shut Off Valve 105. -Thermal Bulb -^3120. Compressor .5 106. Scale Trap -0- 121. Cooling Tower /\ 107. Dryer 108. Strainer 109. High Side Float Hill- 122. Evaporative Con-, denser 123. Solenoid Valve 124. Pressurestat With High Pressure CutOut JL i/ V Abbreviations, Symbols, Standards ______ 805 SPECIFIC HEAT Alloys <Sva! Glass Tri*' Tr* Rocks Steel Tin Zinr Materials Table 1. Specific Heat of Solids3 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 .6.0899 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 s. H S I S S S Table 2. Specific Heat of Liquids Liquid Alcohol. Kthyl PfholpiiTn Sea Water Sd. Gr. 1.0043 Sn. Gr. 1.IMH 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 H S S S s S. Table 3. Specific Heat of Gases and Vapors Substance Air Water Vapor' Temperature F 32-392 80-392 52-417 79-388 68-1900 70-212 32-392 55-404 212 356 C /CSpecific Heat at Constant Pressure Ratio of Specific Heat pt Specific Heat at Constant Volume (Computed) Authority 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 0.1736 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). Noras: 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'A. C. Willard: M--Engineers' Handbook, by Lionel S. Marine