Document X73kaQ3ap72K7MDBO3bNw0Okx

Heating Ventilating Air Conditioning Guide 1949 Enthalpy, 4, 35 free, 4 specific, 4, 35 Entrance loss, 801 Entropy, 4, 35, 50 mixing, 50 Equivalent evaporation, 4 Estimating fuel consumption, 417 Eupatheoscope, 208, 628 Evaporative condensers, 769 cooled, unit conditioners, 705 cooling, 867 Evaporators, 771 Excess air, 335, 362, 367 Exhaust opening, 803, 896 measurement of velocities, 203, 899 Exhaust systems, 895 air flow measurement, 899 axial velocity formula, 899 classification of, 895 corrosion, 907 duct construction, 904 duct design, 904 duct resistance, 906 duct velocity, 904 ducts for, 904 air velocities in, 904 construction, 904 design, 904 resistance, 906 dust filters, 647, 656 efficiency of, 906 hoods, 896 air flow, 899 air velocity, 897 axial velocity formula for, 899 capture velocities, 897 chemical laboratories, 902 design principles, 896 kitchen, 903 large open, 901 lateral exhaust, 902 low velocity systems, 900 spray booths, 902 suction, 897 velocity contours, 900 resistance of, 906 suction requirements, 897 types of fans, 907 . velocity requirements, 897 Expansion ' factor, gases, 92 of pipe, 500, 566 orifice plates, 87, 88 tank size, 517 tanks, 510, 515 valves, 773 F Fan, fans, 387, 388,.631 arrangement of drives, 642 attic, 644 ' location, 645 Fan, fans, attic (continued) types, 644 axial flow, 631 centrifugal, 631 characteristic curves, 634 control, 643 designations, 641 efficiency, 634 furnace system, 443 laws, 632, 633 motive power, 644 noise generated, 640, 841 . performance, 632 radial flow. 631 selection or, 639 air conditioning systems, 639 industrial exhaust systems, 907 speed, 632, 640 system "characteristics, 638 volume control, 643 Fanning formula, 77 Fever therapy, 241 equipment for production of, 241 . film conductance, 115, 122, 124, 152 coefficient, 115, 152, 155 Filter, filters, 388, 647 air conditioning units, 701 dry air, 647, 650,' 929, 933 dust, 647' installation, 654, 933 performance, 651 selection, 653 testing, 651 viscous automatic, 649 viscous impingement type, 648 Fittings, 438, 450, 561 pipe allowance, 438, 450; 477, 505 types of, 438, 450, 568 , Flame temperature, 331 Flexible mountings, 853 Float trap, 492 Floor . cooling uoit, 708 heat transfer coefficients, 137, 142 unit heater, 548 Flow coefficients, orifices, 85, 87, 88 compressible fluids, 81 critical, 84 \ measurement liquids, 91 orifices, 91 Pitot tube, 95, 199 steam, 90 Flow meters, 601 Flue gas loss, 335, 339 . Fluid flow, 75 theory, 75 Fluid meters, 601 Fog, 4, 180 Force, 4 Forced air heating system, 443 circulation pipe sizes, 510 ' convection, 101, 151. Free convection, 105 enthalpy, 4 Friction loss air ducts, 807 circular pipes, 77 elbows, 437, 450, 815, 949 non-circular pipes, 80 water heating, 504 water piping, 504, 947 Fuel, fuels, 325 burning equipment, 349, 373 classification, 325, 328, 329 ' consumption, 417 load factor, 431 mfiTimiim demands, 431 seasonal efficiency, 431 unit consumption, 425 utilization, 388 Fuel oil, 329 carbon residue, 330 classification of,' 329 combustion of, 333, 361 grade of, 329 maiimnm carbon dioxide val ues, 333, 363 theoretical air requirements, 332 viscosity, 330 Fumes, 4, 179 Fundamentals, heat transfer, 101 Furnace, furnaces, 4, 373, 387 capacity, 390 casings, 392 cast iron, 389 design, 392 efficiency, 391 fan, 388 gas-fired units, 364 gravity warm air, 387 heating surface, 392 heavy duty, 388 materials, 389 * mechanical warm air, 443 controls, 447 cooling methods,' 457' cooling system, 459 " dampers, 445 ducts, 445 fans,388 filters, 388 method of designing, 446,459 motors, 388 oil-fired units, 361 rating, 389,'390 steel, 389 stoker-fired units, 350--- types, 387 1 volume, 4, 355. G Gage, gages draft, 198 pressure, 7, 198 Garage ventilation,' 176 ` V. Gas, gases, 160, 184, 188. 329 atmospheric, 969 burner controls, 364, 666''' chimneys for heating; '409 XVI J i i'i (s M ` t<>i .1 t Index to Technical Data Section Gas. gases (continued) classification of, 329 combustion of, 333, 334, 345, 366 estimating consumption, 425 expansion factor, 96 specific heat, 5 solubility, 970 Gaseous fuels classification of, 329 combustion of, 333, 345 flame temperature, 331 morit-mim carbon dioxide val ues, 336 produets of combustion, 331 properties of, 331 specific gravity, 331 theoretical air requirements, 331, 332 Gas-fired appliances, 364 boilers, 364, 384 combustion process, 333, 345, 366 controls, 364, 6ft) conversion burners, 666 furnaces, 373, 666 measurement of efficiency of combustion, 367 ratings for, 367 sizing bating plants, 368 space heaters, 366, 396 coefficient of transmission,-142 heat absorbent, 303 shading of, 304 oolor heat transmitted, 298 Glass block walls coefficient of transmission, 142 ` solar heat gain, 303 Globe thermometer, 208, 527, 629 Goff diagram, 51, 52 Graphical symbols for drawings, 17 duct work, 18 heating, 20 ': piping, 17 refrigerating, 21 ventilating, 20 Grate area, 5, 383, 391 Greek alphabet, 14 Grille, grilles, {see Registers), 433, 435, 444, 784 air supply noises, 849 attenuation, 842 exhaust, 444, 803, 929 locations, 798, 804 door, 804 floor, 804 wall, 804 mechanical furnace systems, 444 noises, 795, 803, 849, 850 railway car, 929 ' recirculating, 801, 929 return, 435, .444, 803/929 Grille, grilles (continued) selection, 850 velocity, 803 Ground temperatures, 261 Guarded hot plate, 207 Gun type oil burners, 357 H Hangers pipe, 567 Hartford return connection, 488 Hay fever symptoms, 243 Heat, 5 area' transmitting surface, 959 auxiliary sources, 265, 311 balance, 336 combustion, 326, 331, 333 emission of appliances, 312 occupants, 215, 217, 223, 225, 310, 616 exchange measurements, 216 flow resistance, 107 flow through roofs, 138-141, 287-296 flow through walls, 133-135, 288-296 gain, 271 generated by motors, 311 umid, 5 infiltration equivalent, 308 instantaneous load, 280 introduced by outside air, 308 latent, 5, 264, 271, 280, 861 liquid, 5 mechanical equivalent of, 6, 15 methods of, transfer, 101 radiant. 615 removal, natural ventilation, 171 sensible, 5, 263, 280, 861 factor, 861 specific, 5 transfer, 101, 115, 151 boiler rates, 375 over-all coefficients, 115,151, 521,960 surfate coils, 540 symbols, 13,115' through building materials, 115 water coils, 960 Heat gain, 280 appliances, 312 ceilings, 307 components of, 307 ducts, 863 electrical beating equipment, 312 floors, 307 gas burning equipment, 313 Heat gain (continued) glass, 298 glass blocks, 303 infiltration, 308 instantaneous, 306 latent, 280, 872 lights, 311 moisture, 315 occupants, 310 outside air, 309 partitions, 307 people, 223, 310 roof, 288, 292 sensible, 263. 872 shaded windows, 304 solar, 271 steam heated equipment, 313 various sources, 266, 316 ventilation, 308 wall, 288, 292 Heat loss air change, 263 bare pipe, 522, 579 basement, 261 duct, 829 infiltration, 263 insulated pipe, 581 latent, 264 residence problems, 266 sensible, 263 through ceilings and roofs, 262 to sky, 282 transmission, 262 Heat pump, 765 Heater, heaters direct-fired unit, 545 electric, 550, 608 solar water, 962 unit, 545 vertical'blow unit, 548' Heating air conditioning units, 697 boilers, 373 surface, 2, 375 coil selection, 539 district, 595 domestic water by electricty, 610 effect, radiator, 525, 526 electric, 607 hot water, 610 load, 249, 380, 863 performance of coils, 151, 960 radiant {see Radiant Heat ing),.\b reversed cycle refrigeration,. 765 steam systems, 461 surface, 8 square foot of, 8 symbols for drawing, 17 up the radiator, 528 vacuum systems, 9, 468 vapor, 9, 466 warm air system, 10, 433, 443 water, 503, 947 Heavy duty fan furnace, 388 High duty humidifiers, 716 Hood, hoods,'896 Horsepower, boiler, 2 XVLl X