Treść książki
Przejdź do opcji czytnikaPrzejdź do nawigacjiPrzejdź do informacjiPrzejdź do stopki
Introduction
Theburningofgasasaveryexpensivefuelshouldbedonewithgreatcare
soastoensurethegreatestpossibleefficiencyoftheuseofitschemicalen-
ergy.Theuseofgasesasfuelscanbedividedintothreemainareas:
1)
combustioninheatingboilers-anisobaricprocesswithalowtempera-
tureofthewallsofthecombustionchamber
2)
combustioninindustrialfurnaces-anisobaricprocesswiththetempera-
turehigherthanthatofgasignition
3)
combustioningasengines:pistonenginesandgasturbines
4)
combustioningasturbines.
Theaboveprocessesshouldaimatmaximumefficiencyinthewayde-
finedinthechaptersthatfollow.Theefficiencyshouldrespecttherequire-
mentsofenvironmentalprotection,whichmeansthathighenergyefficiency
oftheprocesswillcontributetotheloweringofemissionofCO2whileahigh
thermalefficiencywillnotbeaccompaniedbyanincreaseintheemissionsof
nitrogenoxidesNOx.
Energybalanceofanindustrialfurnace
Thebookaimsatpresentingarealisticoptionofeconomizinggasenergy
economytestedpracticallythroughtheinvestigationsconductedbythepre-
sentauthoreitherindependentlyorincooperationwithotherresearchers.The
investigationswereprimarilyconcernedwithcombustionofgasesinindustrial
furnaces.Inthischapteramethodofanalyzingtheefficiencyofthethermal
processwillbepresentedontheexampleoftheenergybalanceofatypical
heatingfurnace.
Modernmethodsofcomputerprogrammingmakeitpossibletodesign
theentirestructureofafurnacewiththeuseofprogramslikeSolidWorks.
Withinthewholeproject,subprogramscanbebuiltdescribingtheareaofgas
(e.g.combustionchamber)andofthesolidbody(e.g.thefurnacewalls,
heatedmaterial)withapackageIGES(InitialGraphicsExchangeSpecification).
Thentemperaturedistributioninsideaload(whichistreatedassolidbody)can
becalculatedusingapackageforsolvingdifferentialequationsdescribingthe
basicrelationsofconservationofenergy,massandmomentum.Theequations
canbesolvedwithprofessionalpackagessuchasCFX.Thepackagecanin-
cludedescriptionsofinversephenomena,forinstanceacalculationofadmis-
sibleheatflowspenetratingtheheatedmaterialwithoutthedestructionofits
