DECEMBER 1948 VOLUME 92, NUMBER 12 A CROSS-INDEX OF SUBJECTS.

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.OC'4U INTRA-CbMRANY CORRESPONDENCE u if* 8* Boynton - New Xoris '*A*V't ' .

PWPli rAAgxip|R I' ETbb~fe^sf VL L73N BOARD 1949 ETC 12158 JANUARY, 1949 ETC 12159 FOUR SCORE AND TEN FOR TEN PACE 7 WATCH YOUR STEP/ PAGE IO m r* r#t G,*ls pAcg /3 behind the whl for BETTER fl)ELS PAGE 18 VACATION ON WINGS vM PAGE 70 verses:'' PAGE 25 JINGLE BELLS PACE 26 " --s*-1.

-4 - In addition to not being able to resolve very small particles, the small fibers would not settle in the allotted time to that plane in the cell where particles are to be counted.

HEATING VENTILATING AIR CONDITIONING GUIDE 1940 Fumes, 77, 778 toxicity of, 81 Furnace, furnaces, 364, 778 baffling, 365 boiler design, 242 capacity, 355 casings, 364 chimney sizes, 191 design for stokers, 208 fuel combustion, 163 gas-fired, 218 gravity systems, 349 mechanical systems. 349 volume, 173, 778 G Gafce Bourdon, 766 draft. 766 hook, 766 pressure. 766, 778 vacuum, 766 Garage, gas heaters, 219 ventilation, 647 Gas. gases. burner control, 664 burning furnace, 364 cleaning of, 512 combustion constants, 631 estimating consumption, 233 flue, analysis, 773 heat content,' 633 limits of inflammability, 79 threshold limits of, 617 toxic. 46 toxidty of, 81 Gas-fired appliances, 217 boilers, 218. 241 chimneys for, 198 combustion process, 220 controls. 220 conversion burners. 220 furnaces, 218 garage heaters, 219 . orsat test, 220 parlor furnaces, 219 radiant heaters, 219 radiators. 219 ratings for, 221 space beaters. 219 warm air radiators, 219 Gaseous fuels classification of, 175 combustion of, 176 flame temperature, 176 maximum carbon dioxide values, 163 products of combustion, 175 properties of. 176 theoretical air requirements, 161 Glass air leakage, 120 solar heat transmitted, 148 walls. 113 Globe, thermometer, 75, 724, 773 valves, 344 Grate area, 249, 778 Grate stokers, 199 Gravitational settling chambers, 512 Gravity convectors, 257, 263 A.S.H.V.E. code. 265 correction factors, 265 effect of superheated steam, 259 heat emission, 257 heating up. 261 *o1<w-tinn Gravity furnace systems, 349 Capacity, 355 design procedure, 349 leader pipe sizes, 350 proportioning wall stacks, 352 recirculating ducts, 353 recirculating grilles, 353 register selections,.353 return connections, 355 warm air, 778 (see Warm air heating systems) Grille, grilles, 529 (see Registers) air velocity measurement, 770 dampers, 542 deflection, 536 ejector effect of, 541 locations, 530 for mechanical furnace systems, 367 noise, 531. 572 selection of, 540 sound control, 533 types of, 541 velocity, 548 Guarded hot plate, 773 Gun type oil burners, 211 H Hay-fever, 77, 506 Health. 45. 80 Heat, 778 auxiliary sources, 135 of combustion, 159 content of gases, 633 content of refrigerants, 32 emission of appliances, 153 emission of occupants. 150 generated by motors, 153 infiltration equivalent. 125 latent, 31. 49, 57 of the liquid, 778 loss, 127 from bare copper pipes, 686 from bare steel pipes, 686 by convection. 717 from ducts, 694 by evaporation, 716 insulated pipes, 692 ` by radiation, 717 mechanical equivalent of, 779 outside air, 151 produced by cow, 647 . pump, 712 rate of production. 716 removal by natural ventilation, 644' -residence, loss example, 137 room load ratios, 387 sensible, 31, 49, 57 solar. 143 transfer, 85 of coils, 469 surface coils, 459 through building materials, 773 transmission, 143 coefficients, 85, 127 by convection, 683 by free convection, 685 by radiation, 683 utilization, 223 Heat gain, 141 appliances, 152 electrical heating equipment, 152 gas burning equipment, 152 glass, 148 insulated cold pipes, 698 for insulated ducts, 699 for insulated pipes, 699 ALPHABETICAL INDEX TO TECHNICAL DATA SECTION Heat gain (continued) latent, 143 light. 153 occupants, 150 outside air. 151 people, 150 roof, 143 sensible, 143 .

HEATING VENTILATING AIR CONDITIONING CUIDE 1940 There are three general types of mechanical return devices in common use, namely, (1) the mechanical return trap, (2) the condensation return pump, and (3) the vacuum return line pump. "-' This, system'is the most common of all methods of steam heating; especially for small size installations, due largely to its low cost and simplicity.' - ' Fig. 2.

HEATING VENTILATING AIR CONDITIONING GUIDE .1940 Table 1.

HEATINC VENTILATING AIR CONDITIONING GUIDE 1940 be used beyond the coil to catch any water which may be blown into the air stream.

HEATING VENTILATING AIR CONDITIONING GUIDE 1941 Pressure (continued) gages, 630, 794 loss through water meters, 775 measurement, 629 barometer, 629 static. 796 total. 797 vapor, 798 velocity, 798 Prime surface. 796 (see Heating Surface) Propeller fan, 543 Properties of saturated steam, 24 Psychrometer, 796 Psychromeiric chart, 33 humidity. 704 Pulverized coal, 158 Pump, pumps condensation return, 261 mechanical circulators, 292 vacuum heating, 262 controls, 263 piston displacement, 264 Pyrometer, 629, 796 optical, 629 radiation, 629 O-R Radial flow fan, 543 Radiant drying, 756 Radiant heating, 759 application methods, 762 calculation principles, 764 detailed computation method, 766 electric, 764 hot water, 762 measurement of, 767 steam, 762 warm air, 762 Radiation, 796 drying methods, 697 heat transmission, 727 load. 229 Radiator, radiators, 239, 796 codes, 247 concealed, 245 direct, 793 effect of paint, 241 effect of superheated steam, 241 enclosed, 243 heat emission of, 239 heating effect, 242 heating up, 243 output of, 240 panel, 795 recessed. 796 selection, 246 tube, 797 types of. 239 Railway air conditioning, 665 air distribution, 666 humidity control, 668 summer systems, 667 temperature control, 668 ventilation, 665 winter systems, 667 Reciprocating compressors, 448 Reflective insulation, 74 Refrigerant, refrigerants, 444, 796 ammonia, 444 carbon dioxide, 448 dichlorodifluoromethane, 446 feeds, 478 methyl chloride, 447 monofluorotrichloromethane. 450 pipe sizes, 461 water, 450 Refrigeration, 443 absorption systems, 454 control, 614 equipment selection, 467 ice systems, 466 mechanical, 443 reverse cycle, 469, 756 ton of, 797 day of, 797 types of compressors, 448 Regain, 677 control of, 676 Register, registers, 557 (see Grilles) noises, 564 railway car, 666 selections, 349 types of, 569 Relative humidity, 19, 796 measurement of, 636 Repulsion induction motors. 642 Residence control systems, 624 air conditioning, 625 coal-fired heating plant, 624 domestic hot water supply, 624 heat loss problems, 121 Resistance thermometers, 629 Return mains. 796 Reverse cycle refrigeration, 469, 769 Reversed return system. 796 Roof, roofs heat flow through, 131 time lag of solar radiation, 133 ventilators, 719, 796 Room control, 605 Rotary drier, 698 Rotating ventilator, 720 S Saturated air, 9. 796 Saturation, 796 degree of, 19, 792 pressure, 796 Secondary air, 148 Self-contained control systems, 604 Sensible beat. 796 loss, 109 Series wound motors, 639 Settling chambers. 540 Shunt wound motors, 639 Silica gel, 427 Silicon dioxide, 427 Single phase motors, 642 Smoke, 796 abatement, 530 density measurements, 638 stacks, 542 Smokeless arch. 796 XX ALPHABETICAL INDEX TO TECHNICAL DATA SECTION Solar heat through shaded windows, 133 time lag, 133 transmission of, 127 transmitted through glass, 132 . transmitted through walls, 131 Solar radiation occlusion of, 530 Soot, 163 Sound control, 558, 591 general suggestions, 592, 602 level meter, 592 Specific enthalpy, 796 . dry air, 5 of water vapor, 7 Specific gravity, 796 - Specific heat, 796 gases, 807 liquids, 807. solids, 807 vapors, 807 Specific volume, 796 of air, 1 of water vapor, 7 Split phase motor, 643 Split,system, 796 Spray booths, 690 cooling ponds, 513 cooling towers. 515 distribution, 605 equipment, 501 generation, 505 humidifiers, 506 Square foot of heating surface, 796 Squirrel cage induction motor, 643 Stack, stacks height, 796 smoke. 542 Standard air, 796 Static electricity elimination of, 681 Static pressure, 580, 796 control, 618 ^ Steady flow energy equation, 34 enthalpy. 35 gravitational energy, 35 heat and-shaft work, 35 kinetic energy, 34 Steam, 797. - coils, 476 distribution piping, 307 estimating consumption, 218 flow, 269 heating systems, 249, 267, 797 air line, 253 condensation return, 256 corrosion, 342 down-feed two-pipe vapor, 255 gravity one-pipe air-vent, 250 gravity return, 239 gravity two-pipe air-vent, 253 mechanical return, 249 one-pipe vapor, 253 orifice, 260 piping for, 267 sub-atmospheric, 258 two-pipe vapor, 254 vacuum, 256 jet type of compressor, 451 Steam (continued) panel beating, 762 radiant heating, 762 requirements, 318 superheated, 796 supply mains, 797 trap, 796 Sterilization of air, 656 Stoker, stokers, 183 classification of, 187 combustion adjustments, 191 combustion process, 190 controls. 191, 624 furnace design. 190 mechanical, 183 overfeed fiat grate stokers, 183 overfeed inclined grate stokers, 184 sizing and ratings. 191 underfeed, 797 rear cleaning, 187 side cleaning, 185 Sub-atmospheric systems, 258 Submerged heating coil, 786 Summer comfort, 61 Supply mains, 797 Supply openings, 557 measurement of velocities, 634 selection of, 568 types of, 569 Surface condensation, 98 conductance, 70, 797 coefficients, 72 heating, 794 extended. 793 Symbols for drawings, 803 T Table average maximum water main temperatures, 509 capacity constants for blow-through unit heaters, 394 capacity constants for draw-through unit heaters, 394 circular equivalents of rectangular ducts, 576 circumference and areas of circles, 808 classification of coals. 153 classification of electric motors, 644 climatic conditions, 116 combustible elements and compounds,.144 conductivity of insulating materials for pipes, 735 degree days for cities, 214 design dry- and wet-bulb temperatures, 126 desirable inside conditions in summer, 62 drying time for materials, 706 exnissivity values for various surfaces, 728 explosive properties of anesthetic, 654 flame temperature data, 146 gain for insulated cold pipes, 742 gas combustion constant, 709 heat gain through glass blocks, 135 heat gain from various sources, 138 heat loss from copper pipe, 730, 731 heat loss from steel pipe. 730 heat transmission coefficients, 69heat transmission through insulated ducts, 740 hot water*consumption in various types of build ings, 789 hot water demand for various types of .fixtures, 789 XXI

HEATINC VENTILATING AIR CONDITIONING GUIDE 1941 Swivel joints are used extensively in low-pressure steam and hot water heating systems and in hot water supply lines.

HEATING VENTILATING AIR CONDITIONING GUIDE 1941 (a) the heat to be removed from the lithium chloride solution to maintain these con ditions, and (b) the temperature rise of the solution in passing through the absorber.

HEATING VENTILATING AIR CONDITIONING CUIDE 1941 Table 2.

HEATING VENTILATINC AIR CONDITIONING GUIDE 1942 DAMAGE CAUSED BY DUST Dust may cause damage in many ways, but usually it must first lodge on a surface.