喷气增焓与喷液技术对比.ppt

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1、VapourInjectionvsLiquidInjectionforRedIceProject162’5b446LIQUIDINJECTIONVAPOURINJECTION612,3455b5a6162,2’455b3EXVlowerdischargesuperheatincreaseofcondensermassflowhigherdischargetemperaturehigherheatingcapacity2LiquidInjection612,3455b5a6162,2’455b3EXVVapourIn

2、jectionEconomizerHXextraspacerequiredEXVSolenoidvalveNCLargeΦrigidpiping,brazedconnections+thermalinsulationCompressor:largeflexible(!)pipe,ext.brazed/int.flangedconnections…PWMsolenoidvalveNCcontrol+valveintegrated(EBX)…SmallΦflexiblesteelpipe,screwedconnecto

3、rCompressor:thinflexiblepipe,smallscrewedconnectorHARDWARECOMPARISON1componentpercompressor!3VAPOUR/LIQUIDINJECTIONCOMPARISONOperatingpointHPSH380-20/65/5/5VapourinjectionLiquidinjectionDry(5Ksuperheat)WetEarlyLateTdisch130/135°C(1)

4、yincrease/stdd+40/+45%(2)=dry+10/+15%tbdPecoHX/Pcd(%)+20/+25%(3)=dry-tbdInj.pipingdiam.(mm)~20mm(4)=dry~5mmtbdnomarginforsuctionsuperheathigherthan5Kstddcompressorcan’tbere-used!(motorre

5、sizingrequired,orscrollsetdownsizing;manifolding:onlyquadroscouldbeconvertedintrios)economizerHXsduty:~20%ofcondenserdutybigconstraintofimplementation(pipesandinjectionholes),specificallyonlargescrollsnotcriticalbecauseunitisoperatedonlyfewdaysperyearatthiscon

6、ditionMAPbenefitdesignbenefitpotentialcapacitybenefitCapacitybenefitCOPbenefit4VAPOUR/LIQUIDINJECTIONCOMPARISONOperatingpointHPSH380-7/48/2/5VapourinjectionLiquidinjectionDry(5Ksuperheat)WetEarlyLateTdisch~100°C

7、~0%tbdCOPhincrease~+5%(1)<=dry~0%tbdPabsincrease~+15%>=dry~0%tbdlimitedinterestat-7/48ratingpoint,whereCOPiscriticalCONCLUSIONForRedIce(largescroll,>90%manifolded)liquidinjectionfeaturesthebest(service/addedcost)ratioForsmallersizes(unitary)thebalancemaybereve

8、rsed…5LiquidInjectionistobeusedonRedIceProjectReasonsAddedcostontheunitHardware(HX,EXV+LSV,pipes,cpextracost…forEVI)Labor(brazing,insulationinstallation)ServiceMAPbenefit:-25/65°Ca