Document qkpb0pQ7Qxg1bBGbqrDvJko8q

Heating Ventilating Air Conditioning Guide 1939 Driers, 666, 667 adiabatic, 667 agitated, 666 batch. 666 compartment, 666 continuous, 666 cylinder, 666 design, 676 drum, 666 festoon, 666 high temperature, 681 .. induction, 666 intermittent, 666 rotary, 666 spray, 666 tower, 666 tunnel, 666 vacuum, 666 Drip, 838 Dripping of steam pipes* 333 Drum driers, 666 Dry air, 838 Dry-bulb temperature, (see 'Temperature, Dry- Bulb) Dry return, 838 Drying, 645, 665, (see also Regain) adiabatic temperature, 667 air circulation in, 671 combustion, 673 by conduction, 667 constant temperature, 668 by convection, 667 design, 676 direct contact, 667 equipment for, 671 estimating method, 683' factors influencing, 669 gas combustion constants for, 677 - high temperature, 670, 681 humidity chart, 672, 673 humidity in, 670 industrial, 645, 665 low temperature, 670 mechanism of, 668 methods of, 665 .moisture in, 669 omissions in the cycle, 668 by radiation, 665 rules for, 670 stages of moisture diffusion, 668 constant rate period, 668 falling rate period, 668 sun, 665 temperature in, 670 time of, 671 materials, 674 ventilation phase, 679 Duct, ducts, air, 404, 581 design of, 581 equal friction method, 587, 593 velocity method, 587 for air distribution, 565 air velocities in, 407, 660 circular equivalents, 589 construction details, 598, 659 design of duct systems, 404, 687/ 596, 652, 658, 659 heat loss from, 746 humidity measurement in, 830 insulation of, 735, 748 lining factor for sound, 609 noise transmission through, 609 pressure loss in, 682. elbows, 582, 660 for recirculated air, 387 resistance, 661 sheet metal for. 698, 659 sizes of, 585,, 589, 653 temperature loss in, 421 - temperature measurement s, 825 velocity measurement in, 827 Dust, 77, 838 air speeds to convey, 653, 660 Dust (continued) , catching devices, 86 - collectors, 661 concentration in air, 80, 831 counter, 831 disposal of, 84 industrial exhaust systems, 651 measurement of, 831 Dynamic equilibrium. Carrier's equation for,.2 Dynamic head, 838 Dysenteria, 60 Eczema, 622 EDR, equivalent direct radiation, 843 Effective temperature, (see Temperature, Effective) Elbow, elbows, design of, 373, 404 equivalents, 406 loss of pressure in, 582 . resistance in, 661 sheet metal used in, 659 welding of, 374 Electric, electrical, automatic, control system, 702 central fan heating systems,. 760 control, motor, 719 current, as corrosion agent,-374, 380 heat equivalent, 139, 158, 766 heaters, 758 conduction. 768 gravity convection, 759 radiant, 759 heating, 767 auxiliary, 765 cost of, 766 of hot water, 763 industrial, 764 heating elements, 758, 759 with unit heaters, 759 lamp bulbs, heat from, 158 motors, 719 resistors, 758 Eliminator plates and baffles, 518 Enthalpy, 22, 838 Entropy, 467, 472, 839 Equations, conversion, 848 Equilibrium, dynamic, 2 hygroscopic, 644 .. . . .......... . .... Equipment noise, 604 ' . * Equipment room, design of,- 609 ' Equivalent, equivalents, circular, 590 direct radiation,'311, 843 elbow. 346 evaporation, 257, 839 heat, of air infiltration, 138 of brake horsepower, 139 mechanical, 841 length of run, 312 - square feet, 264 Estimated design load, 839 Estimated maximum load, 839 Estimating driers, 683 Estimating fuel consumption, 233 Ether, 616 Ethylene, 616 Eupatheoscope, 833 Evaporation, 534 equivalent, 257 from human body, 62, 72 from water pans, 268 Evaporative condensers, 477 Evaporative cooling, 477, '489, 519' Evaporators, 477 ExfUtration, 119 Exhaust systeihs, 651 classification of, 651 collectors, 661 XIV Alphabetical Index to Technical Data Section Exhaust Systems (continued) corrosion, protection against, 663 design procedure for, 652 ducts for, construction of, 659 design of, 658 resistance in, 661, 662 efficiency of, 663 fans for, 663 filters for, 662 flexible, 658 hoods for, 655 air flow in, 656 axial velocity formula for, 665' chemical laboratory, 658 large open, 657 velocity contours in, 665 industrial, 651 lateral, 655 motors for, 663. spray booth, 658 suction requirements, 653 velocity requirements, 653. 660 Expansion, of joints, 783 of pipe, 361, 783 in steam piping, 783 tanks, 355 Explosion hazard, inflammability of gases, 79 in operating rooms, 615 Exposure factors, 138 Extended beating surface, 839 . Extended surface heating unit, 839 F Fan, fans, 549 A.S.H.V.E. test code for, 652 attic, 460 booster, equipment, 396 control of, 559 designation of, 561 drives, arrangement of, 662 for drying, 558 for dust collecting, 559 dynamic efficiency of, 651 - efficiency of, 551 in electrical heaters, 760 furnaces, 399 for gas-fired furnaces, 226 induced draft, 186 for industrial exhaust systems, 663 mechanical draft, 186 mechanical efficiency of, 551 motive power of, 561, 722 control of, 719 operating characteristics, 186, 551 operating velocities, 539, 658 performance of, 549, 557 ratings of, 656 selection of, 402, 556, 559, 561 static efficiency of, 651 system characteristics, 555 systems of heating, 416 tip speeds, 556 total efficiency of, 551 types of, 399, 549, 553, 657 in unit conditioners, 451 in warm air systems, 396, 402 Fatigue, human, 54 Fever therapy, (see Artificial Fever)- Filter, filters, 539 automatic, 541 cloth, 662 design, 639 dry air, 642 hay fever air, 622 < installation of, 643 for sound, 402 unit type, 639 viscous type, 539 Firing rate, 170, 176 Fittings, 361, (see also Connections, Pipe) areas of, 364 boiler, 264 copper, 371 flanged, 372, 739 lift, 294 screwed, 370 welding, 372, 376 Flame, with oil burners,. 219, 223 Flanges, welding neck, 377, 378 Flexible exhaust systems, 658 Flexible materials, 607 Floors, heat transmission through, 109 Flue-gas analysis, 832 Fluid, fluids, cooling of, 529 formula for flow of, 581 . meters, 790 Foodstuffs, regain of moisture of, 644 temperatures and humidities for processing, 640, 674 Force, 839 Forced-air heating system, design, 399 Formulae, conversion, 848 heat transmission, 89 Freezing, of cooling water, 535 insulation against, 749 Friction, of air, in pipes, 584, 585 in chimneys, 191 coefficients, 585 heads in pipes, 342 losses in ducts, 583, 585, 589 . . in water pipes, 807 Fuel, fuels, 163, (see also. Anthracite, Coal, Coke, Gas, Lignite, OH) bed, draft loss through, 195 burning equipment, automatic, 207 burning rate charts, 234, 235 consumption, 233, 241 - oil gages, 226 oil, heating value, 180, 678 oil specifications, 180 requirements, of buildings, 235 degree-day method, 239 utilization of, 233 Fumes, 77, 839 industrial exhaust systems, 651 toxicity of, 81 Fundamentals of heating and air conditioning, 1 Furnace, furnaces, 889 capacity, 389 design of, 216, 262, 383, 400, 405 "gas-fired, 226" . performance curves of, 391 types of, 226, 399, 409 volume, 839 for warm air systems, 399 Fumacestat, 404 G Gage, gages, draft, 824 fuel oil, 225 pressure, 839 steam, 264 vacuum, 824 Galvanometer, 825 Garage, garages, air flow necessary in, 692 heaters, for, 228 Gas, gases, burner control, 714 burning rate chart, 237 calorific value, 139, 182 combustion constants, 677 constant for dry air, 8 XV