Document v12G3XBO7vvzpjxjxDoKRmqQb

Treating Ventilating Air Conditioning Guide 1952 Condensers, 816 air cooled, 816 design data, 758 evaporative, 816 water cooled, 816 Condition line, 59, 309, 633 Conductance, 3,167, 170,' 180 air space, 170,178 building materials, 171, 180 insulators, 174,180, 606 soil, 169 surface, 177, 684, 765 Conduction, 3, 89 drying methods, 989 electric heaters, 893 equation, 90 steady-state solutions, 101 Conductivity, 3, 89. 174, 180 bat type insulation, 174, 180 building boards, 174, 180 building materials, 174, 180 homogeneous materials, 169 insulating materials, 174, 175, 180, 181, 606 insulation blankets, 174, 180 insulators, 174, 180, 606 loose-fiU insulation, 175, 180, 187 masonry materials, 171, 180 plastering materials, 173, 180 reflective insulation, 170, 180 rigid insulation, 175, 180 roofing construction, 173, 181 soil, 176, 177 woods, 173, 181 Conductor, 3 Conduits for piping, 621 Control, controls actuated, 841 actuating, 840 airborne infection, 132 all-year conditioning, 630, 844, 848 application, 846 automatic, 458, 839 fuel appliances, 361, 843 temperature, 844 basic types, 839 central fan system, 629, 848 all-year system, 629, 848 heating cycle, 635 coal-fired plant, 842 compressor, 847 cooling units, 848 dehumidification, 848 . dehydrating equipment, 833 designation, 839 district heating, 851 draft, 326 electric heating, 843 electronic, 839, 853 equipment for motors, 866 fan, 716 gas burner, 843 gas-fired appliances, 843 heating unit, 842 hot water supply, 1031 humidity, railway care, 1000 ice bunker, 847 indicating, 854 individual rooms, 1010 limit, 843 modulating, 844 motor, 820 oil burners, 842 panel heating, 852 pneumatic systems, 839 rate of biochemical reactions, 947 rate of chemical reactions, 945 rate of crystallization, 947 recording, 854 i- Control, controls (continued) refrigeration equipment, 813, 847 compressor type, 847 ice cooling, 847. well water, 847 regain, 944 - residential systems, 842 room thermostat, 843 service water temperature, 1031 ship control, 1010 single .phase motor, 867 Bound, 871 squirrel-cage motor, 866 steam jet system, 848 stoker. 361. 842 system, 644 temperature, 844 terminology, 839 two-position control, 839 unit cooler, 847 unit heaters, 846 unit systems, 846 unit ventilators, 846 valves, 509, 599, 841 ventilator, 226 volume, 661 well water, 847 zone, 844 Controllers, 839 functions, 839 types, 839 Convection, 3, 89, 99 equation, 91 unit conductances, 94 Convector, convectors. 3, 529, 533 correction factor, 534, 536 heat emission, 535 heating effect, 535 induction, 637 ratings, 534 Converging vanes, 653 Conversion burners, 361, 368 equations, 15, 203 Coolers, 571, 581 Cooling, 257, 571 air conditioning units, 571 atmospheric water, 741 coil selection, 777 evaporative, 639 load, 257, 634 methods. 466 performance of coils, 781, 783 ponds, 749 residential, 466 sensible, 639 spray, 745, 749 effect of wind, 750 make-up water, 765 size of equipment, 751, 755 winter freezing, 766 systems. 467, 629,999. 1002 tower design, 757, 758 tower performance, 760 units, 571 component parts, 572 control. 578 definitions, 571 defrosting, 582 design, 572 performance, 571, 579,583 ratings, 578, 582, 583 remote, 576 sound isolation, 575 types of, 571 water, 756 water piping, 1022 Copper elbow equivalents, 513 Core area, 646, 1047 Corrosion, 585, 901 air ducts, 917 atmospheric, 916 boilers. 908 cathodic protection, 919 coal storage equipment, 917 cold water, 912 condensates, 904, 914 flues, 917 heating systems, 908 hot water, 913 industrial exhaust systems, 967 minimizihg condensate, 914 pipe, 918 prevention, 918, 967 refrigerating-systems, 913 ' underwater, 911 Cost of air conditioning, 923 amortization, 923 ' condenser water, 929 first, 923 fixed charges, 923 heating, 931 interest, 926 installed, 923 insurance, 927 maintenance, 927 owning and operating, 923 rent, 927 service, 928 taxes, 927 Crack length used for computations, 249 Crystallization control rate of, 947 Cylinder dryer, 990 D Dalton's rule, 28 Damper, dampers, 326, 451, 629, 662, 849 Darcy formula, 69 Decibel, 871 Definitions, 1 Defrosting, 582 Degree-day, 3, 417 for cities, 429 formula for, method, 428 operating unit, 438 unit fuel consumption, 434, 435 Degree of saturation, 8, 25, 31 Dehumidification, 633, 745, 829 air conditioning units, 576 air washers, 745 coil selection, 767, 777 comparison of methods, 829 control, 833 definitions and methods, 829 equipment, 633, 829, 633 performance, 832 estimating loads, 836 liquid methods, 834 ships, 1009 solid methods, 833 Dehumidifying agents, 829 sorbents, 829 absorbents, 829 adsorbents, 829 Density of air, 1 Design conditions summer, 258, 261 winter, 235, 241 Dew-point apparatus temperature, 309, 633. 644 flue gas, 350, 917 temperature; 9, 26, 1050 Dichlorodifiuoromethane, 793, 794 XIV 1 I - ; Index to Technical Data Section Direct expansion coils, 770 fired unit heater, 555 indirect beating unit, 3 radiator, 7 return system, 3, 518 Disc fan, 705 Distribution of air (see Air Distribution), 439, 449, 829. 645, 671, 998, 1004 District heating, 619 automatic control, 851 glossary of rate terms, 627 meters, 625 piping, 619 conduits for,. 621 inside, 623 overhead distribution, 623 sizes, 620 tunnels, 623 rates, 627 steam requirement, 627 Diverging vanes, 450, 653 Domestic oil burners, 361 Door, doors coefficients of fransmission, 203 leakage, 215, 217 natural ventilation, 215, 225 Down-Feed one-pipe riser, 3, 6, 471 steam heating, 3, 477 system, 4, 469 Draft, drafts, 4, 403 available, 405, 410 calculations, 403 chimney, 403 control, 326 * factors, 404 ' Sneral equation, 403 ad, 4 industrial chimneys, 405 mechanical, 403 natural, 213, 403 regulation, 326 residential chimneys, 409 requirements, 325, 404, 415 theoretical, 403 Drawing symbols, 17 Drip, drips, 4,. 471, 505 Drum dryer, 990 Dry air, 1 composition, 25, 341 . density, 32 filters, 723 properties of,.30 velocity head, 677 Dry-bulb temperature, 9 Dry cooling coils, 639, 767, 781 Dry return, 8, 469 Dryer, dryers, 988 cabinet, 990 calculations, 984 compartment, 990 cylinder, 990 drum, 989 rotary, 990 spray, 990 tunnel, 990 Drying, 945, 969 application of hygrometry, 983 calculations, 984 chart, 983, 985 conduction, 989 constant rate period, 973, 975 convection, 989 control, 987 critical moisture, 980 effect of air velocity, 974 Drying (continued) equations, 980 equilibrium moisture, 981 equipment, 988 example, 992 external conditions, 971 factors influencing, 970 falling rate period, 917 internal conditions, 971 mechanism of, 970 methods, 988 conduction, 989 convection, 989 radiant, 988 periods, 972 problem, 992 radiant, 988 surface temperature, 974 systems, 969 terminology, 969 Duct, ducts, 441-443, 452, 669 air velocities in, 450, 685, 963 approaches to outlets, 661 area change, 680 attenuation, 879 circular equivalents, 673 construction details, 694 design, 442, 452, 685, 696, 964 design methods, 687 elbow friction losses, 678, 966 exhaust Hpaign, 9Q4 friction losses, 669 heat loss coefficients, 697 lining, 882 maintenance, 701 measurement of velocities, . 1043 noise transmitted, 874 pressure changes, 683 pressure loss, 669, 678 recirculating, 441, 443, 450, 664 rectangular equivalents of round, 417, 673 resistance, 669, 966 roughness correction, 673 aide outlets, 662 sizes, 669 sound absorbers, 880 symbols for drawing, 19 . system design, 442, 452, 669 Duct sizing, 669, 685 equal friction method, 688 general rules, 442, 452, 687 static regain method, 690 velocity method, 687 Dust, 4, 151 combustible, 161 concentrations, 155 determination, 154 filtera, 723, 727 precipitators, 727 removal, 723 size, 153 Dust collectors, 723, 735 application, 719 centrifugal, 737 cinder catching, 722 cyclone, 737 dry dynamic, 721 high efficiency, 721 electrostatic, 735 fabric, 736 factors affecting selection, 734 settling chambers, 738 testing methods, 738 wet, 736 centrifugal, 737 disintegrator, 737 dynamic precipitator, 737 orifice type, 737 packed tower, 737 washers, 720 XV Dynamic-head, 5, 674 tames,' 674 EDR (Equivalent direct radia tion) 7,385, 480, 484, 486, 488. 529 ' defined, 7, 385, 529, 534 Effective temperature, 9,122 chart, 125, 126 index, 122 Ejector nozzles, 658 Elbow attenuation, 879 copper equivalents, 513 friction losses, 485,513 iron equivalents, 485, 513,1020 sheet metal, equivalent, 443. 456, 678, 679 681, 966 Electric, electrical air conditioning, 895 boilers, 895, 896 control systems, 839 heaters, 893 conduction. 893 gravity convection, 894 radiant, 894 heating, 893 calculating capacities, 898 central fan. 895 control, 839 domestic water, 896 elements, 893 induction, 898 power problems, 899 resistors, 8, -693 hot water heating, 897 motor design limits, 856 panel heating, 544 precipitators, 727 radiant heating, 894 resistors, 893 systems, 855 voltage ratings, 856 unit heaters, 894 Electricity static, 948 Emissivity, 95, 170 Enclosed radiator, 539 Enthalpy, 4, 23,30,51 free, 4 specific, 4, 30 Entropy, 4, 30, 51 mixing, 51 Equivalent evaporation, 4 Estimating fuel consumption, 423 Eupatheoscope, 1052 Evaporative condensers, 816 cooled, unit conditioners, 571 cooling, 639 Evaporators, 817 Excess air, 341, 344,347, 371 Exhaust opening, 664, 956 measurement of velocities. 960. 1047 Exhaust systems, 955 air flow measurement, 959 axial velocity formula, 959 capture velocities, 957 classification of, 955 conveying velocity, 963 corrosion, 967 duct construction, 964 duct design, 964