Document 2R0xxjbBgNYRnLZbDX1LEXG85

heating Ventilating air conditioning guide 1944 Pipe, piping (continued) > heat losses, 344 hot water heating systems, 303 inside, 766 insulation prevent freezing, 353 leader sizes, 362, 365, 366 low temperature insulation, 351 'materials, 323 overhead distribution, 766 proportioning wall stacks, 360, 362 return ducts,'360, 363, 367 recirculating grilles. 363 refrigerant sizes, 486 register selections,,362, 363 return connection, 364 . `eizes, 283 -- - high pressure steam, 293 ` hot water forced circulation, 305 hot water gravity circulation, 305 indirect heating units, 299 initial pressure, 283 maximum velocity, 283 one pipe riser,.282 orifice systems, 299 ' pressure drop, 283 ' sub-atmospheric systems, 299 tables for. 287 two-pipe gravity air-vent system, 289 two-pipe riser, 282 two-pipe, vapor systems, 290 vacuum systems. 291 - * water supply systems, 801 steam distribution, 761 - Hearn heating systems, 279 supports, 330 symbols for drawing, 826 ' . tax,-243 . threads,-330 thread connections, 330, 334 -tunnels, 765 '' underground insulation, 357 s ' unit heater connections, 419 - water supply, 801 - * Pitot'tubes, 658 Plate celU 628 Plenum absorbers, 627 Plenum chamber, 817 . Pneumatic control systems, 640 Pollution of air, 545 Polyphase motors, 670 Ponds, 631.' ' 'Potentiometer,. 817 'rPower,' 817 . Precipitators, 558 . . Pre-cooling, 405. ' Premature infant nurseries, 687 "Erasure' ' . / -- absblute, 813 atmospheric, 813 . gages, 657, 816 ..s ^ measurement, 656 V; -barometer,`656 ' regulators, 294, 766 . .static; 819 . ,, total,-819 / vap6r.'820 . i -velocity, 820 , . water supply piping/801 ' - ' Precipitators, 558 ` ; . Prime surface, 818 (see Heating surface) Propeller fan, 565 Properties of saturated steam, 24 ; .. Psychrometer, 818 . Psychrometric chart, 60 ' Pump, pumps - . ^ condensation return, 273 mechanical.circulators, 312. t vacuum heating, 274 controls, 275 .. piston displacement, 276 - , Pyrometer,'656, 818'. 1 : optical, 656 -radiation, 656 Q-R Radial flow fan, 565 Radiant drying, 782 Radiant heating, 785, 818 application methods, 788 calculation principles, 790 detailed computation method, 792 drying methods, 733 electric, 790 equivalent temperature, 792 hot water, 788, 790 mean radiant temperature, 792 measurement of, 797 steam, 788 warm air, 788 Radiation, 828 angle factor, 78 equation, 76 load, 243 Radiator, radiators, 251, 818 codes, 254, 255 concealed, 253 connections. 295 correction factor, 255, 256 direct, 815 effect of paint, 256 enclosed, 259 gas-fired; 218 heat emission of, 251, 253 heating effect, 256 heating up. 258 output of, 256 panel, 817 . ratings, 254 recessed. 818 . tube, 252, 819 '5 types of, 251 -. warm air, 218 Railway air conditioning^ 697 air distribution, 698 " humidity control, 700 summer systems, 699 ~ temperature control. 700 ventilation, 697 winter systems, 699' .Reciprocating compressors, 470 Recooling, 401 Rectangular duct equivalents, 600 Reducing valves, 294, 766 Reflective insulation, 93, 98, 99 _. Refrigerant, refrigerants, 467, 818 ammonia, 466 _ carbon dioxide, 470 v dichlorodifluorojnethane, 468 feeds. 498 * methyl chloride, 469. . monofluorotrichloromethane, 472 ' i- pipe-sizes,*486- _ water, 472 ' Refrigeration, 465 absorption systems, .476 compression systems, 475 r control, 650 condensers.-479 (see Condensers) . equipment selection, 489 expansion valves,*478 ice systems, 487 load. 164 TWAfhaniral. 465 reverse cycle, 491, 782 storage systems, 489 symbols for drawing, 830 tou of, 819 day of, 819 types of compressors, 470 (see Compressors) Regain, 711 control of, 709 ' - hygroscopic materials, 710 Register, registers, 580, 586,,(r Grilles) air supply noises, 631 mechanical furnace systems, 371 noises, 591- ' - -. - ' . railway.car. 698 -T. selection, 360, 361, 362 XX index to technical data section Reheat, 401 Reheating, 399 Relative humidity, 19, 818 measurement of, 662 . Repulsion induction motors, 669 Residence control systems. 645 air conditioning, 639, 645 coal-fired heating plant, 645 domestic hot water supply, 645 cooling methods, 380 gravity furnace system, 358 heat loss problems, 140 hot water heating system, 303 humidity-requirements, 379 mechanical furnace system, 371 steam heating-system, 261 `Resistance thermometers, 656 Resistors, 776 , Return grille, 590 mains, 818 openings. 586 Reverse cycle refrigeration, 491, 782 Reversed return system, 304, 818 , roofs heat flow through; 152 time lag of solar radiation, 154 ventilators, -756 air motion, 583 ` control,'649 cross transmission, noise, 634 latent heat, 394 . noise level. 622 - operating, 683 ' sensible beat, 394 . . Rotary dryer, 734 Rotary oil burner, 212 - Run-around- system, .405 s ' Saturated air, 9, 818 --Saturation. 818 degree of, 19, 814 .-pressure, 818 ' Secondary air, 170, 182 Sectional boiler, 237 -. Self-contained. . . control systems. 639 . humidifiers, 526 . unit conditioner, 429 . isible cooling, 405 . aensible.heat, 818 - factor. 394 - gain, 148,164 . _ . loss; 126 - -Series wound motors/666 ... -Sheet metal gages, 611 . ..Ship air conditioning, 704 (see Marine) ,' - heating, 835 ' * ventilation, 835. Shunt wound motors, 665 ' gel. 447,-449 - .JJh dioxide. 447 Lgle phase motors, 668 tied outlets, 587 ioke, 818 : . abatement, 550 . . density measurements, 664 smokeless arch, 818 Smokeless combustion, 172, 550 . cheat ;v' - ' . through shaded windows, 154 ' .'time lag, 154 - transmission of, 148 -^transmitted through glass, 153 transmitted through walls, 148 Solar radiation against walls, 152 occlusion of, 550 Solar water heater, 810 Soot, 183 Sound (see Noise) absorbers, 625 attenuation. 624, 628 control, 620 cross transmission between rooms, 634 . general problem, 620 duct absorbers, 625 levels, 621 outlet absorbers, 628 Space heaters, 217 Specific enthalpy, 5, 818 dry air, 5, 6 water vapor, 8 gravity, 818 gaseous fuels, 184 heat, 818 gases. 831 liquids, 831 solids, 831 vapors, 831 volume, 1, 818 air. 1 -water vapor, 7 Split phase motor, 668,^669 Split system, 818 Splitter dampers, 375 Spray booths, 725 cooling, 445, 530 cooling ponds, 534 cooling towers, 535 distribution, 525 dryer, 746 equipment, 521 generation,- 525 humidifiers, 526 type unit, 535 unit air conditioner, 447 Spread. air distribution. 581 Square foot of beating surface, 818 Squeeze dampers. 375 Squirrel-cage induction motor, 670 Stack, stacks. 757 height. 818 wall. 362 Standard, rtandards, 821 air distribution, 579 atmosphere, 38 State air conditioning, 832 heating. 832 ventilating, 832 Standard air, 819 Static electricity-elimination, 714 pressure, 819 - control, 642 Steady flow energy equation, 36 enthalpy. 38 gravitational energy, 37 heat and shaft work, 38 kinetic energy, 36 Steam, 819 . coils, 496 distribution piping. 761 estimating consumption, 234 flow, 280, 281 heated equipment, 159 heating systems, 261, 279, 819 air line, 265" . condensation return, 268. corrosion, 341 .down-feed two-pipe vapor, 267- ' gravity one-pipe air-vent, 262 . gravity return, 261 -- gravity two-pipe air-vent, 265 xxi