Document zQ3ORN7pZ7qroKoNkje5LM5Ea

Heating Ventilating Air Conditioning Guide 1949 'Pipe, piping {continued) economical thickness insula* tion, 591 expansion, 566 fittings, 561 fitting equivalent, 477, 505 flexibility, 566 hangers, 567 heat losses, 579 hot water heating systems, 603 inside dimensions, 562 insulation prevent freezing, 589 leader sizes, 436 low temperature insulation, 588 materials, 561, 982 overhead distribution, 467, 699, 954 refrigerant sizes, 775 . sizes, 471, 504 high pressure steam, 479 hot water forced circulation, 515 hot water gravity circula tion, 513 indirect heating units, 486 low pressure, 477 maximum velocity, 475, 510 one pipe riser, 478 orifice systems, 471 pressure drop, 478-483, 505 sub-atmospheric systems, 486 tables for, 480 two-pipe riser, 478 two-pipe vapor systems, 484 vacuum systems, 485 water supply systems, 947 steam distribution, 461, 595, 599 steam beating systems, 461 supports, 567 symbols for drawing, 17 ' tax, 380, 381 thread connections, 567 threads, 667 tunnels, 599 underground insulation, 596 unit heater connections, 462, 553 water supply, 947 Pitot tubes, 95, 200 Plate cell, 846 Plenum absorbers, 845 Plenum chamber, 6 Pneumatic control systems, 663 Pressure {continued) regulators, 486, 598, 664 static, 7 taps, 88 total, 7 vapor, 7 velocity, 7 Prime surface {see Healing Sur face), 8 Propeller fan, .631 Protective Coatings, 982 Psychrometer, 7. 53 Psychrometric chart, 226 Pump, pumps condensate return, 490 mechanical circulators, 503 vacuum hwating, 490 controls, 491 piston displacement, 491 Pyrometer, 7, 196 optical, 196 radiation, 196 R Radial flow fan, 631 Radiant drying, 914 Radiant heating, 615 application methods, 618 * calculation principles, 620 oontrol, 629 electric, 620 fundamental computations. 617 hot water, 618 mean radiant temperature. 615 measurement of, 628 objective, 617 operative temperature, 616, 628 steam, 619 warm air, 618 Radiation, 7 baseboard, 521 equation, 106 load, 380 shape factor, 106 Pollution of air, 179 Polyphase motors, 678, 685 Ponds, 717 Potentiometer, 6 Power, 6 Precipitators, 650, 657 Pre-cooling, 867 Preheating, 857 Premature infant nurseries, 239 Pressure absolute, 6 atmospheric, 1 gages, 197 foes, water supply 947 measurement, 197 barometer, 198 ` piping, - Radiator, radiators, 7, 521 baseboard, 521 codes, 524, 991 concealed, 523 connections, 499, 500 correction factor, 525 . direct, 7 effect of paint, 526 enclosed, 528 gas-fired, 366 heat emission of, 521 heating effect, 526 heating up, 528 output of, 521 panel, 6 ratings, 524 recessed, 7, 523 tube, 521 types of, 521 warm air, 366 Railway air conditioning, 927 air distribution, 928 air cleaning, 928 humidity control, 930 summer systems, 928 temperature control; 930 ventilation, 928 winter systems, 927. Reciprocating compressors, 766 Reoooling, 857 Rectangular duct equivalents, 811 Reducing valves, 486, 598 Reflective insulation, 118,. 126 Refrigerant, refrigerants, 7, 747 ammonia, 747, 752 dichiorodifluoromethane, 747, 750- feeds, 534 monochlorodifluoromethane, 751 monofluorotrichioromethane, 754 pipe sizes, 775 water, 761 Refrigeration, 745, 944 absorption systems, 762 air cycle, 760 basic concepts, 745 complex cycles, 759 condensers (see Condensers) 769 control, 772 ` definitions, 745 discharge pressure, 757 equipment selection, 778 expansion valves, 772 float valves, 773 heat pump, 765 ice systems, 764 load, 271 mechanical, 745 piping, 775 .. reverse cycle, 765 ship, 944 simple cycle, 753 steam jet, 761 suction, 757 symbols for drawing, 17 theory, 745 ton of, 7, 745 types of compressors {see Compressors), 766 vapor compression cycle, 753 water jacket, 757 Regain, 888 control of, 889 hygroscopic materials, 890 .static, 826 Register, registers, (see Grilles), 435, 436, 444, 784 air supply noises, 822, 849 mechanical furnace systems, 443 noises, 850 railway car, 829 selection, 435, 436, 444, 797 Reheat, 860, 869 Reheating, 860, 869. Relative humidity, 5, .66 measurement of, 204 Repulsion induction motors, 689 `II .-rr L Index to Technical Data'Seetion Residence oontrol systems, 666 air conditioning, 663 coal-fired heating plant, 666 domestic hot water supply, 961 cooling methods, 459 gravity furnace systems, 433 heat loss problems, 266 hot water heating system, 503 mechanical furnace system, 443 steam heating system, 461 Resistance thermometers, 196 Resistors, 607 Return grille, 435, 437 mains, 8, 461, 480, 483, 508 openings, 435, 446, 803 Reverse cycle refrigeration, 765, 766 Reversed return system, 8, 510 Roof, roofs heat flow through, 139-142, 288-299 fcimA lag of solar radiation, 287, 291 > ventilators, 174 * Room air motion, 783, 793- control, 664 - cross transmission noise, 851 latent heat, 861 noise level, 840 operating, 238 sensible heat, 861 Rotary dryer, 916 Rotary oil burner, 358 Run-around system, 868 s Saturated air, 1, 49 Saturation, 8 degree of, 8, 49 pressure, 7 Scale, 965 cause and prevention, 965, closed systems, 971 heating systems, 972 high temperature, 972 open systems, 972 Secondary air, 335, 366, 367 iectional boiler, 373 elf-contained . control systems, 663 humidifiers^ 559 unit conditioner, 697 Sensible oooling, 867 Sensible heat, 271, 280, 312, 316, 321,861,872 factor, 861 gain, 271,309, 312; 315 Ship air' conditioning Marine), 937 heating, 938- -ventilation, 939 (see Ship air conditioning (continued) Shunt wound motors, 680 Silica gel, 735, 737 Silioon dioxide, 737 Single phase motors, 678, 689 Slime, 973 cause and prevention, 973 formers, 967 Slotted outlets, 786 Sludge, 965 cause **d prevention, 969 Smoke, 8, 179 ' abatement, 183, 341 - density measurements; 209 Smokeless arch, 8 Smokeless combustion, 183, 341 Solar heat, 280 absorbed by glass, 301 altitude, 261 through shaded windows, 304, 306 time lag, 287 transmission of, 280 through glass, 294, 298, 299 through roofs, 292 through walls, 292 Solar constant, 8, 281 Solar radiation, 281 absorption of, 281 Solar water heater, 962 Sol-Air temperature, 284 Soot,- 346 Sorbents, 735 absorbents, 740 adsorbents, 735 Sound (see Noise), 837 absorbers, 843 attenuation, 842 control, 838 cross transmission between rooms, 851 general problem, 838 duct absorbers, 843 isolation, 701 levels. 783, 840 outlet absorbers, 847 Space heaters, 393. Specific enthalpy, 4, 23, 35, 71, 72 dry air, 35, 52 entropy, 4, 24 gravity. 5 heat,5 volume, 10 air, 35 water vapor, 36 Split system, 8 Splitter dampers, 800 Spray apparatus, 709 booths, 902 cooling, 717 cooling ponds, 717 cooling towers, 719 ' dehumidifier, 713 distribution, 715 dryer, 917 equipment, 709 unit air conditioner, 701 'Spread, air distribution, 791 Square foot of heating surface, 8 Squeeze dampers, 445, 800 Squirrel-cage induction motor. Stack, stacks, 173, 399, 433, 446 height, 8 wall, 433, 446 smoke, 399 Standard, standards, 987 air distribution, 783 atmosphere, 70 Standard air, 1 Static electricity elimination, 892 pressure, 7 Steady flow, energy equation, 70 enthalpy, 4, 23, 69 gravitational energy, 69 neat and shaft work, 69 kinetic energy, 68 Steam, 8 coils, 531 distribution piping, 595 estimating consumption, 417, 428, 603 flow, 473 flow measurement, 90 heated equipment, 313 heating systems, 461 condensate return, 461 connections to units, 500 control valves, 501 corrosion, 972 gravity one-pipe air-vent, 462 gravity return, 461 high pressure steam, 465 mechanical return, 462 one-pipe vapor, 464 orifice, 470 piping for, 461 sub-atmospheric, 469 two-pipe vapor, 466 vacuum, 468 jet type of compressor, 761 meters, 601 ''panel heating, 615 pipe capacities, 476, 478-483, 947 properties, 36, 48 radiant heating, 615 rates, 603.. reducing' valves, 486 requirements, 428, 603 runout, 463 . superheated, 8 . table, 36, 48 traps, 492 Steel boilers, 374, 376 Sterilization of air, 235 Stoker, stokers 349 classification of, 349 cumbustion adjustments, 354 combustion process, 351 * controls, 357,- 666 . furnace design, 355 - mechanical, 349 overfeed flat grate,- 351 overfeed inclined grate, 351 sizing and ratings, 356 underfeed, 350 x