Book - School of Science and Technology

Index 709Chiller systems 652±3, 652Chimneyeffect 194Chimneys 323±39areas 331Clean Air Act 328construction 331±4design principles 323±39economic life 682height 328, 329infiltration 47liquid fuels 324±7losses 320±1, 320±1solid fuels 324±7Chlorinated rubber paint 442Chlorofluorocarbons (CFC) 534CHP see Combined heat and powerChurches 370±2Cigarette smoke 342±3Circular galvanised steelducts 439, 439Circulating pressure (CP)249±50, 249Circulating pumps 148, 618±19,619Circulators (storageheaters) 569±70, 569Cisterns 591±2, 591Clark, I. T. 422Classification (ductwork) 438Clean Air Act 328Cleaning filters 489±93Cleanrooms 431±3, 432Climate change 659The Climate Change Levy660±1, 688Clinker handling 299, 300Closed centrifugal fans 478Closed circuit water coolers 551Closed stoves 98±9, 99Closed-loop control systems 621,641Clothing comfort criteria 7Coal 297±9, 300Coanda effect 414, 416Codes of practiceenvironment 374smoke control 366±7Coefficient of performance(COP) 532, 557±61, 558±9Coking boilers 279, 279±80, 281Cold deck 380Cold draw pipework 257±8Cold feed supplyexpansion pipes 248pipework design 605storage heaters 566±72water heaters 591±2, 591Colthorpe, K. J. 61Combination boilers 265Combination water heaters576±8Combined exhaust heatexchanger/silencer 694, 695Combined heat and power (CHP)systemsconcept 688±96, 689±96domestic heating 116fuel cells 699±701running costs 663±4selection criteria 696±8Combined radiant/convectiveheating 187±94Combustionair 283process 317±20products 324reactions 318, 322±3Comfort criteria 4±11, 16Commissioning proceduresductwork 470±3summer time 68±9water pipes 245Communication 657Compensator controls 641Compressors 531drives 560±1, 561Computational fluid dynamics(CFD) 46Computersductwork design 456heat gains 91±2, 92simulation 674±5, 675workstations 398±9Condensatescentrifugal pumps 208cooler units 218, 218handling equipment 220±3pipe sizes 254±5, 255receiver sets 223, 223removal 222, 222return pumps 223, 223steam heating 159, 160, 164±5Condensationheating systems 97, 98ventilation 344winter time 42±5Condensersboilers 265±6, 265±6evaporative coolers 550refrigeration 531, 547±9water treatment 554water units 652, 653Conditional maintenance 680Conditioned air 89Conductance 23Conductionair to air losses 27±9definition 5losses 21±3, 27±9solar heat gain 85±6, 88temperature difference 85±6, 88Conductivity5±6, 23Cone-type ceiling diffusers 418,418Conservation of energy20, 67±8,681Conservation of Fuel andPower 661Constant fan speed 481Constant flow regulators 246Constructionatypical features 33±42chimneys 331±4pumps 211Consumption correctionfactors 123, 123Containment rooms 432Contaminantsair 484±5, 485indoor 8ventilation 342±5Continuous naturalconvectors 195±6, 196Continuous versus intermittentoperation 60±5Contract maintenance 680Controls 621, 639±53air-conditioning 643±53boilers 276±7closed loops 621combined heat/powersystems 692±3components 627±35dampers 633±5, 634±5direct heating 112±13economic life 683gas boilers 290heating 641±3, 641hot water supply589±93objectives 620±1oil boilers 286±7operation modes 635±9regulations 621±4, 622±3room storage heaters 133±4sensors 621, 624±7, 625±6storage heaters 142unventilated hot watersystems 592±3valves 629±33, 629±32Convection 6, 201heat transfer 176, 178panels 403, 404Convective heaters 194±202direct systems 103±7, 111±13radiant combined 187±94temperature relationships 53Conversion factors, units 704±5Coolingbuildings overnight 94±5capacity522±3coils 379, 524, 644±5, 646cross flow evaporation 551,551