Document daybvxoj33V1zRG7jK92nre9Q

American Society of Heating and Ventilating Engineers Guide, 1937 Diverter, back draft. 479 Domestic oil burners, 506 Domestic supply, hot water, 512, 659, 721 control, 292 water, 645 Doors, air leakage through, 134 coefficients of transmission of, 127 natural ventilation through, 88 Down-feed piping systems, 548, 549, 550, 552, 790 Downward system of air distribution, 360 Draft, 463 available, 466, 473 back, diverter, 479 dimensions. 480' calculations, 463 capacity, 465 equation, 473 gage, 778 head. 790 ' intensity required, 474, 487 losses, 474 in chimneys. 476 through fuel bed, 474 mechanical, 464 natural, 463 theoretical, 466 towers, 229, 230 Drain connections, 458 Draw-through heating units, 171 Drawing, symbols for, 804 Dripping of steam pipes, 597 Drum dryers, 740 Dry-bulb temperature, {see Temperature, Dry-bulb) Dry return, 791 Driers, 741 adiabatic, 741 agitated, 740 batch, 740 compartment, 740 continuous, 740 cylinder, 740 design, 750 drum. 740 festoon, 740 high temperature, 755 induction. 740 intermittent, 740 rotary, 740 spray, 740 tower, 740 tunnel, 740 vacuum, 740 Drying, 731, 739, (see alsoRegain) adiabatic temperature, 741 air circulation in, 745 combustion, 747 by conduction, 741 constant temperature, 742 control operation, 741 circulation, 741 by convection, 741 design, 750 direct contact. 741 equipment for, 745' estimating method, 757. factors influencing, 743 gas combustipn constants for, 751 high temperature, 744, 755 humidity in, 744 humidity chart, 746, 747 low temperature, 744 mechanism of, 742 methods of, 739 omissions in the cycle, 742 - by radiation, 739 . stages of moisture diffusion, 742 constant rate period, 742 falling rate period, 742 sun, 739 temperature in, 744 time of, 745 materials, 748 vacuum. 726 ventilation phase. 753 Duct, ducts, * air, 363, 432 design of, 363, 369 equal friction method, 369, 371 velocity method, 369 for air distribution, 347 air velocities in, 392, 435 circular equivalents, 372 " construction details, 380, 391 design of duct systems, 369, 378, 390, 432 humidity measurement in, 783 lining factor for sound, 342 noise transmission through, 342 pressure loss in, 364 elbows, 364, 393 - for recirculated air, 415 resistance, 393 sheet metal for, 380, 391 sizes of, 367, 371, 385 temperature loss in, 175, 412 temperature measurement in, 778 velocity measurement in, 780 Dust. 83, 295, 791 air speeds to convey, 392 catching devices, 301 collectors, 393 concentration in air, 307, 784 ' counter, 784 disposal of, 303 industrial exhaust systems, 383 measurement of, 784 Dynamic equilibrium Carrier's equation for, 2 E EDR, equivalent direct radiation, 796 Effective temperature, (see Temperature, Effective) Elbow, elbows, design, of, 432, 636 equivalents, 607 loss of pressure in, 364 ' resistance in, 393 sheet metal used in, 391 welding of, 634 _ Electric, electrical, automatic, control system, 278 central fan heating systems, 718 control, motor, 761 current, as corrosion agent, 642 heat equivalent, 725 heating, 715 auxiliary, 723 cost of, 724 cost of insulation, 725 of hot water, 721 heating elements, 256, 715, 716 with unit heaters, 718 lamp bulbs, heat from, 151 . motors, 761 Eliminator plates and baffles, 217 Emissivity, 708 Enclosures, concealed heaters, 538 . convectors, 538 effect of, 537 unit air conditioners/261 Engines, Diesel, 226 internal combustion, 225 Enthalpy. 22, 791 . Entropy, 28, 775 Equations, conversion, 801 Equilibrium, dynamic, 2 hygroscopic, 730 Equipment room, design of, 341 Equivalent, equivalents, circular, 372 direct radiation, 150, 601, 796 elbow, 607 evaporation, 451, 791 ( XII Alphabetical Index to Technical Data Section Equivalent, equivalents (continued) heat, 801 . ,,, of air infiltration, 140 of brake horsepower, 151 - electrical, 725, 802 mechanical, 794 length of run, 575 square feet, 534 Estimating fuel consumption, 521 Eupatheoscope, 711, 723, 786 / Evaporation, 232 equivalent, 451 from human body, 58, 80- . from water pans, 538 Evaporative cooling, 185, 195, 197, 219 Evaporators, 37 Exfiltration. 131, 173, 521 Exhaust systems, 383 efficiency of, 395 flexible, 390 industrial, 383, 390 I lateral. 389 Expansion, of joints, 585, 689 of pipe. 585, 627, 689 in steam piping, 689 tnnlc9. 617 F Fan, fans. 317 as accessory apparatus, 718 ` A.S.H.V.E. test code for, 320 attic, 271 booster, equipment, 187, 424 control of, 327 designation of, 329 drives, arrangement of, 328 for drying, 326 for dust collecting, 327 dynamic efficiency of, 319 efficiency of, 319 in electrical heaters, 718, 723 furnaces, 411, 437 for gas-fired furnaces, 514 for industrial exhaust systems, 395 mechanical draft, 464 mechanical efficiency of, 319 motive power of, 329, 761' control of, 761 . operating characteristics, 319 operating velocities, 325, 326 performance of, 317, 325 quietness of, 245 ratings of, 324 selection of, 324, 327, 329, 395, 436 static efficiency of, 319 system characteristics, 323 systems of heating, 169 tip speeds, 324 total efficiency of, 319 types of, 317, 321, 325, 424 in unit conditioners, 261 in warm air systems, 424, 430 Fatigue, human, 60- Filter, filters, 303, 310 automatic, 312 cloth, 394 design of, 310 dry air, 313 installation of, 313 resistance of, 430 for sound, 342 unit type, 310 viscous type, 310 Fire walls, 391 Fittings, 623, (see also Connections, Pipe) areas of, 632 copper, 633 flanged, 636 lift, 556 screwed, 632 welding, 639, 640 Flame, with oil burners, 507, 509 Flanges, welding neck, 639, 640 Flexible materials, 339 Floors, heat transmission through, 121 Flowers, temperatures for greenhouses, 737 . Fluid, fluids, cooling of, 225 formula for flow of, 363 meters, 696 Foodstuffs, regain of moisture of, 730 temperatures and humidities for processing, 734 Force, 792 Forced-air heating system; design, 434 Forge shops, heat given off in, 91 Formulae, conversion, 801 heat transmission, 101 Foundries, heat given off in, 91 . .Freezing, of cooling water, 232 insulation against, 679 Friction, of air in pipes, 366, 367 in chimneys, 468 coefficients, 367 factors, 427 heads in pipes, 606 in heating units, 172 losses in ducts, 365, 367, 371 in water pipes, 653 ' Fuel, fuels, 483, (see also Anthracite, Coal, Coke, Gas, Lignite, Oil) ' bed, draft loss through, 473 burning equipment, automatic, 497 consumption, 521 oil. heating value, 752 requirements, 522 degree-day method, 523 theoretical method, 522 utilization of, 521 Fumes, 295, 792 industrial exhaust systems, 383 toxicity of, 299 Fundamentals of heating and air conditioning, 1' Furnace, furnaces, 792 capacity. 417 design of. 417, 446, 428, 434, 491 door slot openings, 486 hand-fired, 491 performance curves of, 419 ratings of, 437 . ' types of, 427, 437, 514 volume, 792 for warm air systems, 427, 47 / Furnacestat, 433 G Gage, gages, draft, 778 pressure, 777,. 792 steam, 457 vacuum, 777 . Galvanometer, 778 Garage, garages, air flow necessary in, 92 A.S.H.V.E. ventilation code, 96 heaters for, 516 Gas, gases, burner control 290 calorific value, 151, 493 constant for dry air, 8 in chimneys, 467 flue, analysis, 784 . fuel, manufactured, 493 natural, 493 properties of, 494 scrubbers, 303 toxicity of, 299 - X1U if