Document 8Rne4dQrzMoj9GGBOzYeYzNXa

Heating Ventilating Air Conditioning Guide 1938 Health, 83, 599; (see also Disease Treatment) Heart trouble, 605 Heat, 824 absorbed by building structure, 141 of adsorption, 43 air infiltration equivalent of, 130 capacity, 155, 825 of leader pipes, 378 of condensation, 45 conduction, 821 consumption, 224 content, of air and water vapor, 2 of coal, 166 of dry air, 22 of gases, 661 of saturated water vapor, 23 convection, 821 conversion equations, 833 , demand, factors governing, 133, 241 effects on human body, 54 electrical equivalents of, 750, 834 emission, of convectors, 263, 270 by radiation, 756 of radiators, 263, 270 equivalent, equivalents, 834 of air infiltration, 130 of brake horsepower, 140 electrical, 350, 834 exchanger, 507, 508 shell and tube, 481 flow meter, 817 gain, from fixtures and machinery, 160 for insulated pipe, 735 from outside air, 158 to be removed, 430 infiltration equivalent of, 130 latent, 31, 826, loss, 73, 76 of the liquid, 28, 825 loss, from bare pipe, 719, 721 computation of, 89, 142, .750, 758 cost of. 720 determination of, 133, 140, 229, 753 from ducts, 730 effect of insulation on, 737 from human body, 73, 753, 755 by infiltration, 130, 229 latent, 73, 76 from piping of gas-fired furnaces, 225 by radiation, 61, 753 sensible, 73, 755 to unheated rooms, 118 ventilation, 675 maximum probable demand, 133, 241 of mixing, 47 mechanical equivalent of, 826 produced by cattle, 679 produced by human body, 53 pump, 472, 749 radiant, 753 calculation of, 758 measurement of, 761 types of, 756 radiation, 743, 753 regulation in man, 53, 57 requirements, 229 sensible, 147, 827 of air, 12 loss, 73, 756 of water, 31 solar, 151 sources of, 745, 754 other than heating plant, 140, 149 > specific, 31 total, 22. 829 of saturated steam, 28 transfer, 89 coefficients, 90 rate, 247 Heat (continued) transmission, 89, 754 through air spaces, 91 through building materials, 91 calculations, 89 coefficients, 89, 96 of ceilings. 111 combined, 118 of copper pipe, 721 of doors, 117 of floors. 111 of glass walls, 117 of insulation, 97, 821 of partition walls, 110 of roofs, 114 of skylights, 117 V . of surface conductance, 92 of walls, 104 of windows, 117, 151 convection equation, 754. definition of terms used, 90 effects of solar radiation on, 151 formulae, 91 through glass, 116, 151 measurement of, 817 in surface coolers, 431 by surfaces not exposed to the sun, 149 symbols used in formulae, 90 tables, 89, 97 through ducts, 730 time lag, 155 utilization, 229 Heaters, direct-fired, 443 for domestic hot water, 799 electric, 741 capacity of, 750 conduction, 743 convection, 743 radiant, 223, 743 space, 223 unit, 437, 743 wall, 222 Heating, (see also'Heat) auxiliary, 749 district, 765 effect of radiators, 266 electrical, 741 elements, electric, 742 fundamentals of, 1 load, 133 medium, 825 radiant, 743, 753 railway air conditioning, 611 by reversed refrigeration, 472, 749 surface, 247, 825 square foot of, 828 symbols, 836 systems, district, 765 electrical, 741 fan, 409 gravity warm air furnace, 377 hot water, 331, 825 mechanical warm air furnace, 393 radiant, 743, 753 steam, 275, 745 units, blow-through, 411 central fan, 744 draw-through, 411 value, fuel oil, 660 water, 783 Henry and Dalton, law of, 375 Hoods, . axial velocity formula, 637 canopy, 639 for chemical laboratories, 640 design of, 634 . for exhaust systems, 637 of furnaces, 395 open, 639 suction pressures at, 635 velocity pressures at, 637 XIV Alphabetical Index to Technical Data Section Horsepower, 825 boiler, 251 brake, heat equivalent of, 140 Hospital air conditioning, (see Disease Treat ment) Hot box, 817 Hot plate, 817 Hot water, domestic control of, 700 load. 253 supply, 797 Hot water heaters, 245, 799 Hot water heating systems, 331, 825 electric, 720 forced circulation, 331, 337 gravity circulation, 331 installation of, 351 mechanical circulation, 333 Hot water piping, 331 Hotels, steam consumption, 234 stokers suitable for, 201 temperatures of, in winter, 134 water supply, 783 Humidification, 10, 499, 825 apparatus for, 503 atomization for, 504 effective temperatures for, 65 methods of, 452 relative humidities for, 68 for residences, 403 systems of, 503 with washer, 501 Humidifier, humidifiers; 466 atomizing, 504 ". with fan systems, 419 high-duty, 504 self-contained, 505 spray, 505 types of, 466, 503 Humidistat, 400, 825 Humidity, 8, 825 absolute, 8, 819 control, 685 railway air conditioning, 612 in drying, 652 in hospitals, 597 for industrial processing, 622, 623 measurement of, 814 optimum, 68 relative, 9, 827, (see also Relative Humidity) in comfort zone, 63 effect on moisture regain, 625 relation to dew-point, 9 specific, 8. 825 Hygroscopic materials, 626 moisture content, 625 processing of, 627 regain, 626 Hygrostat, 825 Hypertension, 607 Hyperthyroidism, 607, 699 1 Ice, in air conditioning, 407, 454, 496 control of, 701 Inch of water, 825 Induction motor, 707, 710, (see also Motors) Industrial, air conditioning, 621 apparatus for, 449, 503 calculations, 629 air pollution, 79 control, biochemical reactions, 628 chemical reactions, 628 crystallization, 629 moisture content, 625 of regain, 624 Industrial (continued) cooling systems, 469 design conditions, 621 drying, 540, 627 electrical heating systems, 748 , exhaust systems, 633, (see also Exhaust Systems) general requirements, 624 heat sources, 141 temperatures and humidities for processing, 622, 623 unit heaters, 444 Infants, premature. 63, 65, 600 Infiltration, 121 average, 126 fuel utilization, 229 heat equivalent, 130 through shingles, 123 through walls, 122 through windows, 124 Inflammability of gases, 81 Institutions, water supply to, 804 Instruments, 807 Insulation, 825 asbestos type, corrugated, 725, 726 laminated, 727, 728 of boilers, 261 bright metal foil, 94, 95 building, 751 characteristics of, 97, 723 of conduits, 738 of ducts, 732 economical thickness, 736 with electrical heating, 715 heat transmission through, 97, 723 for low temperatures, 733 magnesia type, 724 of piping, 719 to prevent condensation, 141, 734 to prevent freezing, 733 reflective type, 94, 95 rock wool type, 729 of sound, 587 tables, 97. 724 thickness needed, 736 underground, 737 of vibration, 587 Ionization of air, 75 Isobaric, 825 Isothermal, 7, 826 J-K Joints, expansion, 315, 767 Kata thermometer, 811 L Lag in heat transmission, 155 Latent heat, 31, 826 . loss, 72 of water vapor, 12 Lateral exhaust system, 637 Leader pipes, 378 heat carrying capacity of, 379 size of, 379, 389 Leakage of air, 121, (see also Infiltration) Lignite, 166 Liquid, heat of the, 28, 825 Lithium chloride system of adsorption, 46, 492, 493 Load, building factors, 240 cooling, 147 design, 251, 823 heating, 133 hot water supply, 825 maximum, 824 radiation, 824 Low temperature insulation, 733 XV