Document wgKwvXZLajQm7gZpqkgBm0gRQ

American Society of Heating and Ventilating Engineers Guide, 1936 Domestic oil burners, 494 Domestic supply, hot water, 500, 643, 705 water, 629 Doors, air leakage through, 134 coefficients of transmission of, 125 natural ventilation through, 92 Down-feed piping systems, 536, 537, 538, 541, 774 Downward system of air distribution, 348 Draft, 451 available, 454, 460 back, diverter, 466 dimensions, 467 calculations, 451 capacity, 453 equation, 460 gage. 762 head, 774 intensity required, 460, 475 losses, 460 in chimneys, 463 through fuel bed, 460 mechanical, 452 natural. 451 theoretical, 454 . towers, 210 Drain connections, 445 Draw-through heating units, 389 Drawing, symbols for, 787 Dripping of steam pipes, 582 Drum dryers, 727 Dry-bulb temperature, (see Temperature, Dry-bulb) Dry return, 774 Dryers, agitator, 727 air current, 723 arrangement, 744 artificial air, 723 cabinet, 728 can, 727 compartment, 728 construction, 744 - contact, 723 cylinder, 727 design, 739 experimental technique, 744 drum, 727 electric induction, 729 loft, 728 natural, 723 operating the, 737 operation, 724 pan, 727 room, 728 rotary, 728 spray, 728 tunnel, 729 types of, 727 Drying, 715, 723 (see alsoRegain) adiabatic temperature, 727 | - constant temperature, 727 . control operation, 734 circulation, 734 heat and humidity, 736 high temperature, 725 low temperature, 725 mechanism of, 729 methods of, 723 omissions in the cycle. 731 stages of moisture diffusion, 729 constant rate period, 730 falling rate period, 730 sun, 723 time of, 737 materials, 738 vacuum, 726 ventilation phase, 742 Duct, ducts, air, 351 design of, 351, 356 equal friction method, 357, 359 velocity method, 357' for air distribution, 343 air velocities inf 380 Ducts, ducts (continued), circular equivalents, 360 construction details, 368, 379 design of duct systems. 357, 366, 378, 408 humidity measurement in, 767 noise transmission through, 337 pressure loss in. 352 elbows. 352, 381 for recirculated air, 421 resistance, 381 sheet metal for, 368, 379 sizes of, 355, 359, 373 ' temperature loss in, 393, 419 temperature measurement in, 763 velocity measurement in, 764 Dust, 75, 287. 774 air speeds to convey, 380 catching devices, 293 collectors, 381 concentration in air, 299, 768 counter, 768 disposal of, 295 industrial exhaust systems, 371 measurement of, 768 Dynamic equilibrium Carrier's equation for, 2 EDR, equivalent direct radiation. 780 Effective temperature, (see Temperature, Effective) Elbow, elbows, design of, 408, 619 equivalents, 591 loss of pressure in, 352 resistance in, 381 sheet metal used in, 379 welding of, 621 Electric, electrical, central fan heating systems, 702 control, motor. 747 current, as corrosion agent,'626 heat equivalents, 709 heating, 699 auxiliary, 707 cost of, 708 cost of insulation, 708 of hot water, 705 heating elements, 238, 699, 700 with unit heaters, 702 induction dryer, 729 , lamp bulbs, heat from, 151 motors, 747 Eliminator plates and baffles, 201, 205 Emissivity, 692 Enclosures, concealed heaters, 527 convectors, 527 effect of, 525 unit air conditioners, 244 Engines, Diesel, 208 internal combustion, 207' Enthalpy, 22, 775 Entropy, 27, 775 Equations, conversion, 785 Equilibrium, dynamic, 2 hygroscopic, 714 * moisture content, 734 Equipment room, design of, 333 Equivalent, equivalents, circular, 360 direct radiation, 150, 587, 780 elbow, 591 evaporation, 439, 775 / heat, 785 of air infiltration, 140 of brake horsepower, 151 electrical, 709, 786 mechanical, 778 length of run, 561 square feet, 522 Estimating fuel consumption, 509 xii Alphabetical Index to Technical Data Section Eupatheoscope, 695, 707, 770 Evaporation, 31, 32, 211, 212 equivalent. 439, 775 from human body, 59, 84 rate of. 31 from water pans, 526 Evaporative cooling, 169, 179, 181, 202 Evaporators, 38 Exfiltration, 131, 391, 509 Exhaust systems, 371 efficiency of, 383 flexible, 378 industrial, 372, 378 lateral, 377 . Expansion, of joints, 571, 673 of pipe, 571, 610, 673 in steam piping, 571 tanks, 602 Exposure factors, 150 F Fan, fans. 309 as accessory apparatus, 702 A.S.H.V.E. test code for, 312 attic, 252. 408 booster, equipment, 170, 430 brake horsepower, 205 control of, 319 for cooling. 408 designation of, 321 drives, arrangement of, 320 for drying, 318 for dust collecting, 319 dynamic efficiency of, 311 efficiency of, 311 in electrical heaters, 702, 707 furnaces, 403, 415 for gas-fired furnaces, 502 for industrial exhaust systems, 383 mechanical draft, 452 mechanical efficiency of, 311 motive power of, 321, 747 control of, 747 operating characteristics, 311 operating velocities, 317, 318 performance of, 309, 317 quietness of, 226 ratings of, 316 selection of. 316. 319, 321, 383. 414 static efficiency of, 311 system characteristics, 315 systems of heating, 387 tip speeds, 317 total efficiency-of, 311 types of, 309, 313, 317, 430 in unit conditioners, 244 in warm air systems, 405, 414, 430 Fatigue, human, 61 Fiber saturation point, 732 Filter, filters. 295, 302 automatic, 303 doth, 382 design of, 302 dry air, 304 installation of, 305 resistance of, 407 for sound, 337 unit type, 302 viscous type, 302 Fire walls, 379 Fittings, 607 (see also Connections, Pipe) areas of, 615 copper, 618 flanged, 619 lift, 545 ' screwed, 615 welding, 623, 624 Flame, with oil burners, 495, 497 Flanges, welding neck, 623, 624 Floors, heat transmission-through, 119 Flowers, temperatures for greenhouses. 721 Fluid, fluids, cooling of, 207 formula for flow of, 351 meters, 680 ' Foodstuffs, regain of moisture of, 714 temperatures and humidities for processing, 718 Force, 775 Forge shops, heat given off in, 95 Formulae, conversion, 785 heat transmission, 105 Foundries, heat given off in, 95 Freezing, of cooling water, 211 insulation against, 663 Friction, of air in pipes, 354, 355 in chimneys, 456 coefficients, 355 heads in pipes. 590 in heating units, 390 losses in ducts, 353, 355, 359 -in water pipes, 637 Fuel, fuels, 471 (see also Anthracite, Coal, Coke, Gas, Lignite, Off) bed, draft loss through; 460 burning equipment, automatic, 485 consumption, 509 requirements, 510 degree-day method, 511 method of approximation, 510 utilization of, 509 Fumes, 287, 775 industrial exhaust systems, 371 toxirity of, 291 Fundamentals of heating and air conditioning, 1 Furnace, furnaces, 775 design of. 404, 411, 424. 436, 479 door slot openings, 474 hand-fired, 479 performance curves of, 425 ratings of; 415 types of. 403, 415, 502 volume. 775 for warm air systems, 403, 424 Fumacestat, 411 * G Gage, gages, draft, 762 pressure. 761. 776 steam. 444 vacuum, 761 Galvanometer, 762 Garage, garages, air flow necessary in, 96 A.S.H.V.E. ventilation code, 100 heaters for, 504 Gas, gases, calorific value, 151, 481 constant for dry air, 8 in chimneys, 455 flue, analysis, 768 fuel, manufactured, 481 natural, 481 properties of, 482 scrubbers, 295 toxidty of, 291 Gas-fired appliances, 279, 501 accessory conditioning equipment, 252 automatic control of, 279, 501 , boilers, 435, 442. 502 selection factors, 505 carbon monoxide produced by, 506 chimneys for, 466 classification, 501 control of. 502, 504 conversion burners, 504, 506 furnace requirements for, 404, 411 Xlll