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1、EXERGYANALYSISOFANEXPERIMENTALSINGLE-STAGEHEATTRANSFORMEROPERATINGWITHTHEWATER/LITHIUMBROMIDEMIXTUREWITHANDWITHOUTADDITIVES*W.Rivera1,H.Martínez1,J.Cerezo2,R.J.Romero3andM.J.Cardoso41CentrodeInvestigaciónenEnergía,UNAM,A.P.34,62580Temixco,Mor.,México2Instit
2、utodeIngeniería,UniversidadAutónomadeBajaCalifornia,Blvd.BenitoJuárez,BajaCalifornia21280,México3CentrodeInvestigaciónenIngenieríayCienciasAplicadas(CIICAp),UAEM.Av.UniversidadNo.1001Col.Chamilpa,C.P.62209,Cuernavaca,Morelos,México.4InstitutodeInvestigacion
3、esEléctricas,Av.Reforma113,Col.Palmira,62490,Cuernavaca,Mor.México.AbstractSecondlawofthermodynamicshavebeenusedtoanalysetheperformanceofanexperimentalsingle-stageheattransformeroperatingwiththewater/lithiumbromidemixturewithandwithoutadditives.Thesystemisi
4、nstalledintheCentrodeInvestigaciónenEnergíaoftheUniversidadNacionalAutónomadeMéxico.Enthalpycoefficientsofperformance(COP),externalcoefficientsofperformance(COPEXT),exergycoefficientsofperformance(ECOP)andtheirreversibilitiesofthecomponentshavebeencalculate
5、dagainstthemainoperatingtemperaturesofthesystem.TheresultsshowedthatthehighestCOP,COPEXTandECOPvaluesandthelowestirreversibilitiesareobtainedwiththeuseofthe2-ethyl-1-hexanol(400ppm)additive,followedbythe1-octanoladditive.Thelowestcoefficientsofperformancean
6、dhighestirreversibilitieswereobtainedbyusingthewater/lithiumbromidemixturewithoutadditive.Analysingtheirreversibilitiesineachoneofthemaincomponentsofthesystem,itwasfoundthattheuseoftheadditive2-ethyl-1-hexanoldecreasesconsiderablytheirreversibilityintheabso
7、rberincreasingtheefficiencyofthiscomponentandconsequentlyoftheentirecycle.Keywords:absorptionheattransformers;water/lithiumbromide;exergy,additives.*Correspondingauthor.Tel.+52555629740,E-mail:wrgf@cie.unam.mx1.IntroductionTheoreticalstudiesbasedonthefirstl
8、awofthermodynamicsofsingleandadvancedabsorptionheattransformersoperatingwiththewater/lithiumbromidemixturehavebeenstudiedbyRiveraetal.,[1-2],Zhaoetal.[3]andBarraganetal.[4].Experimentalstudieshavebeenr
