Document gEJK1nE5v2wv21azDabkB6KZL

Heating Ventilating Air Conditioning Guide 1938 Pressure, pressures (continued) measurement of, 807 partial, Dalton's law of. 1 refrigerating plant, 486 of saturated vapor, 12 static, 421, 828 steam, in direct heating, 765 drop, 278, 302, 307 initial, 302 in orifice systems, 290 saturated, 28 in sub-atmospheric systems, 289 total. 829 vapor, 31, 830 velocity, 830 water, 27, 789 Prime surface, 827 Processing, 621 cooling systems, 469, 621 industrial, temperatures and humidities for, 622 of textiles, 626 unit heaters, 444 Propeller fans, test code for, 534 Psychrometer, 827 sling, 811 Psychrometric, chart, 25, 60, 61, 62, (back cover) for drier, 654 explanation, 25 tests, 59 Pulmonary disturbances, 605 Pump, pumps, centrifugal, 334 characteristics, 181 circulating, 333 condensation return, 292 heat. 472, 749 vacuum, 293 Pyrometer, 810, 827 mercurial, 810 optical, 810 radiation, 810 i thermo-electric, 810 Q-R Quality, of air, 69, 70, 71 impaired by recirculation 83 Quantity, of air, measurement of, 811 necessary for ventilation, 70, 71, 72, 168, 609, 675 of cooling water, 511 Radiant heaters, 743 Radiant heating, 753 physical and physiological factors, 753 Radiation, 827 by black body, 759 ' drying with, 647 equivalent direct. 304, 828 heat loss by, 63, 76, 754 by human body, 63, 76, 754 load. 252 of pipe, 722 by radiators, 263 solar, 151, (see also Solar Heal) occlusion of, 84 through glass, 152 through walls, 152 ultra-violet, 75, 82 Radiator, radiators, 263, 827 A.S.H.V.E. code for, 271 column, 821 concealed, 821 condensation rate in, 267 connections, 320, 348 control of, 687 correction rating factors. 271 effect of superheated steam, 265 enclosed, 267 gas-fired, 223 Radiator, radiators (continued) heat emission of, 263, 270 heating capacity of, 270 heating effect of, 266 for hot water systems, 346 output of, 264 paint, effect of, 265 panel, 827 pipe coil, 263 ratings of, 264 recessed, 827 selection, 270 tube. 829 types of, 263 wall, output, 264 warm air, 223 Railway air conditioning,' 609 air distribution, 560, 610 > cleaning, 611 *" . cooling equipment, 611 . calculation of, load, 6191' capacity, 612 costs, 617 heating, 611 humidity control, 612 power requirements, 613 tractive resistance, 615 temperature control, 613 ventilation, 609 Raoults law, 493 Receivers, alternating, 299 Refrigerants, 35, 827 ammonia, 36 carbon dioxide, 38 codes for use of, 426 dichlorodifluoromethane, 40 lithium chloride, 46, 47 methyl chloride, 42 monofluorotrichloroniethane, 44 water, 45 Refrigerating, capacity, 429,' 475 Refrigerating plant, 24, 469 centrifugal, 478 1 compressor, 470, 512 operating methods. 485 size of, 429, 475, 485 steam jet system, 477, 512 types of, 471 . Refrigeration, characteristics, 481 curves, 480, 481 coefficient of performance, '475 camot cycle, 475 compression ratio, 477 ,' control of, equipment, 701 dehumidification by, 470 efficiency, cycle, 475 ejector, 479 mechanical, 477 losses, 476 mechanical, 472 pipe sizing, 484 discharge, 486 liquid, 487 suction, 488 practical cycle, 475 reverse cycle, 749 limiting factors, 749 systems, absorption, closed, 493 centrifugal, 479 mechanical, 496 steam ejector, 477 various types, 469 theoretical mechanical cycle, 473 theoretical work per pound, 474 ton of, 429, 475, 829 ton days of, 829 unit of, 429, 475 Regain, control of, 624 of hygroscopic materials, 626 Registers, 827, (see also Grilles) with gas-fired furnaces, 223 with gravity furnace systems, 381 xvill Alphabetical Index to Technical Data Section Registers (continued) with mechanical warm air furnace systems, 397 selection of, 381 sizes, 381, 389 temperature, 401 velocity through, 401 Reheater, 424, 432 Relative humidity, 9, 826 apparatus sensitive to, 684 in comfort zone, 64, 68 relation of dew-point to. 9 control of, 684 in industrial plants, 622, 624 for processing, 622 in public buildings, 67 in residences, 403 from water pans, 403 Relays, 685 Relief valves, 350 Repulsion motors, 706, 707 Research residence, 388, 406 Residences, air distribution in, 397 automatic fuel burning equipment, 201 conditioning units, 291, 460 control systems, 399, 699 gas heat, 221 humidification of, 403 oil burners for, 213 requirements in, 405 steam consumption, 234 stokers for, 204 Resistance, of bright metallic surfaces, 94 of building materials, 97 in ducts, 565, 643 of exhaust systems, 643 of filters, 396 of insulators, 97 thermal, 829 thermometer, 810 Resistor, 742 Respiratory diseases. 607 Restaurants, tobacco smoke, in, 70 water supply to, 804 Return, dry, 823 mains, 827 pipe, capacity, 308 ' reversed, 827 wet, 830 Reverse cycle of refrigeration, 495, 749 Reversed return system, 332 Reynolds number, 184 Ringelmann chart, 816 Rock wool insulation, 100, 729 Roof, roofs, coefficients of transmission of, 114 conductivities of, 101 solar radiation on, 152, 153, 154 ventilator, 672, 827 Room absorption correction charts, 557 Room control, 687 S Salts in cooling water, 509 Saturated air, 827 Saturation, fiber point, 651 Scale, in boilers, 260 Centigrade, 809 on equipment, 509 Fahrenheit, 809 in pipe, 374 Reaumur, 809 School, schools, air flow necessary in, 70 optimum air conditions, 65 stokers suitable for, 201 temperature of, in winter, 134 ventilation in, 70 Scrubbers, 499, 528 Self-contained control system, 686 Sensible heat, 147, 827 of air, 12 loss, 73 of water, 31 Series wound motor, 703 Service connections, 770 Sheet metal, for ducts, 580, 641 Shingles air leakage through, 123 Shunt wound motor, 703 Skin diseases, 607 Silica gel with oxygen chambers, 606 regain of moisture of, 626 silicon dioxide, 41 equilibrium conditions, 43 system of adsorption,* 39, 41, 491 Single phase motor, 706 Sizes of pipe, (see Pipe Sizes) Skylights. 117, 671 Sling psychrometer, 814 Slip-ring wound motors, 710 Smoke, 79, 827 abatement of, 84 measurement of, 816 recorders, 816 tobacco, 70 Smokeless arch, 828 Solar heat, 151 absorption coefficients, 155 effect of, awnings, 155 latitude, 152 intensity chart, 150 occlusion of, 84 radiation, factors, 154 through glass, 152 through walls, 152 time lag, 155 Solenoid valves, 685 Sound, 583. (see also Noise) absorption coefficients, 589 control, 583 duct lining factor, 593 effect on duct design, 567 insulation of, 589 intensity, 335 measurement of, 584 in steam heating systems, 303 unit of, 583 Specific density, 3 Specific gravity, 2, 828 of fuel gas, 176 Specific heat, 3, 828 of air, 5 mean, of water vapor, 3 of water, 31 Specific humidity, 8 Specific volume, 3, 828 of saturated steam, 31 Split phase motor, 707 Split system, 828 air conditioning equipment, 461 automatic control of, 689 central fan, 409 unit ventilators, 445 Spray, booths for painting, 640 cooling, ponds, 513 efficiency of, 512 towers, 514 distribution of, 504 generation of, 504 humidifiers, 505 type of central station system, 423 water coolers, 482, 512 Square foot of heating surface, 828 Squirrel cage motors, 707 Stack, stacks, 378, 689 effect, 670 height, 828 ' size of. 380, 389, 675 wall, 380 Stairways, 129 XIX