Book - School of Science and Technology

720 Indexextract grilles 430±1industry351±3, 356±7, 370±2kitchens 360±6, 361±5losses 21, 122methods 349±60rates 17, 341±5recirculation units 370±2summer time 89Verticalair distribution 415fan coils 392fins 80±2shading 80±1spindle pumps 207, 210Vessels 595±6, 595Viabilitycharts 684±7, 685±6Vibration transmission 466±7Viscosity(liquid fuels) 301Viscous impingement airfilters 487, 491, 492Volatiles 296Volumecontrol 425definition 6±7expansion 146psychrometry 517steam properties 160units 2see also Variable volume . . .Volumetric heat capacity144Volute centrifugal pumps 204,205Walker, W. 347Wallscavityfill 36±9, 37±9conduction gain 88solar heat gain 88storage heaters 121U values 25Warm air unitscapacity127central storage heaters 121gaseous fuels 104±7, 105±6liquid fuels 100storage equipment 135±6Warm water heaters 144±6Warren SpringLaboratory484Washable air filters 489, 489Washers 495±7, 496±7Waste products 315±16, 316Watercentrifugal pumps 205±8chillers 542±4, 651±2circulation 509±11content in copper 147content in steel 147dew point 318±19evaporative coolers 551, 553flow meters 227hardness 574, 593±5mass flow 233properties 145storage heaters 567supplyto boilers 266±7thermal properties 140treatment additives 230treatments 554, 593±5tube boilers 273±4velocities 235±9, 236see also Hot waterWater heatersboilers 276±7, 584±91calorifiers 580±4, 581±3central systems 572±8characteristics 144±51combination systems 576±8cylinders 578±84, 578±83feed cisterns 591±2, 591indirect heating 144±58local systems 564±72materials 595±6, 595on peak storage 566±72solar collectors 596±7storage capacity584±91unventilated 592±3water treatments 593±5Water pipeworkcommissioning 245copper 235, 612design 232±51, 598±619embedded panes 245flow 233±6, 234±6gravitycirculation 248±51heat emission 240±1heating systems 151±8hydraulic design 247hydraulic gradients 243±4index circuits 243loadings 241±2losses 563±4mechanised design 247outflow 606±7, 606±7pressure condition 247pressure loss 236, 237±9primary598±600, 599regulating valves 246, 246return 600±14, 601±13reversed-return 244secondaryoutflow 600±14single resistances 233±5single-pipe circuits 237±8size calculations 234±40system flushing 245two-pipe circuits 238±40water flow 233±6, 234±6zone circuits 244±5, 245see also Hot water pipeworkWater-to-water calorifiers580±1, 581Water-to-waterexchangers 694Water-waybottom boilers 268Weather data 376±7, 376±7Weeklyuse heating systems666±7Weight tests 486Weighting scales 462, 462Welded sheet steel 441Wet back boilers 272Wet bulbdepression 14isotherms 94, 94temperatures 14, 377, 518Wet core boilers 121, 128, 137±8,138±9Wheatstone bridges 625±6Whole building airinfiltration 58Whole life costs 681±3Wilkins, J. 406Willis, S. 406Windchill indices 12, 12effects 354±5, 354flow patterns 48, 48pressures 47Windowsair-conditioning 391fan coils 391infiltration 47±50solar heat gain 76±80U values 35±6, 36Winter timeair-conditioning 374, 524±7considerations 19±65draughts 326enthalpyefficiency 505±6heating 524±7humidifiers 524±7Wiredrawing 163, 163Zeolites 594Zone heating controls 641±2Zone water pipe systems244±5Zoned air-conditioning 379±82,645, 646