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蒸发式冷凝器空调系统性能实验VIP免费

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№.3·138·陕西科技大学学报JOURNALOFSHAANXIUNIVERSITYOFSCIENCE&TECHNOLOGYJurL2008V0L26‘文章编号:1000-5811(2008)03—0138—07EVAPoRATIVECoNDENSERAIRCoNDITIoNSYSTEMPERFoRMANCETUAi—min。ZHUDong—sheng.ZHAOQiang(InstituteofChemicalandEnergyEngineering,EducationalMinistrysKeyLabofEnhancedHeatTransferandEnergyConservation,SouthChinaUniv.ofTech,Guangzhou510640,China)Abstract:Aperformancetestofairconditionsystembasedonevaporativecondenseriscar—riedout.Theresultsoftestshowthatthesystemscoefficientofperformance(COP)isuptoaround3.5evenifitrunninginanambientoflargerrelativehumidity.Theheatemissioncapacityofevaporativecondenserisimpactedobviouslybythewetbulbtemperatureofair。Whenotherparametersconstant,theheatemissiondecreasesaround5whilethewetbulbtemperaturerisebyonedegreeCelsiusinthetestingscope.ThetestingresultsforavariableworkingconditiondisplaysthatthesystemsCOPandtheenergyefficiencyratio(R)ofe—vaporativecondenseraredecreasedalongwiththereducingcoldload.Theresultsalsodis—playsthatthesystemsCOPcanincreaseupwardstoover5whileavariablefrequencydrivefortheinducedfanisused.Keywords:evaporativecondenser;aircondition;coefficientofperformance(COP)CLCNumber:TQ051.5DocumentCode:A0IntroductionEvaporativecondenserisakindofcompactheatexchangerwhichcombinedthecharacteristicsofair-cooledcondenser,water-cooledcondenserandcoolingtower.Sinceitmainlyreliesonwaterevaporationtoexhaustheat,therecyclingwaterneededareonly30to60ofthewater-cooledtype.Further—more,duetothecoolingwaterrecycleonlyintheinnerloopofcondenserequipment,pumpspowercostareonlyonefourthtoonethirdofwater—cooledcondenserwithcoolingtowersystem,andwatertreat—mentcostsaremuchlowertoo.Asthecharacteristicsofevaporativecondenserrelyonevaporativecool—ing,generalconsideredthatthistypecondenserismoresuitableforaridregionsE'.Inaddition。ithasbeenrecognizedthatinlarge-scaleindustrialrefrigerationregion,evaporativecondenserhascertainad—vantages.Therefore,inpetroleum,chemicals,fertilizer,sodaash,beverages,foodandmanyotherin—dustrialapplications,water—cooledcondenserisgraduallyreplacedbyevaporativecondenser.However,inotherrejoin,evaporativecondenserisstillrarelybeenadopted.Literaturesopenedindicatethatstudiestargetedabouttheperformanceofevaporativecondenserarestillrarelyreported,andareoftenlinkedtotheresearchofclosedcoolingtower.Inaddition,thelitera—turemainlyconcentratedonthetheoreticalmodelandoperationalcontrol[。一,butlittleonthefieldofci—vilianapplication.PetersonandHunnevaluateaevaporativecoolerinDallasofficebuildingair-condi—tioningsystems,andanalysisshowsthatthesystemenhancetheefficiencyof70%thanthetraditiona1收稿日期:2OO8一O3一O5作者简介:涂爱~(1971-),男,江西省高安市人,在读博士生,研究方向:传热强化与制冷空调技术基金项目:教育部博士点研究基金项目(No.20050261017)维普资讯http://www.cqvip.comwww.zhulong.com第3期涂爱民等:蒸发式冷凝器空调系统性能实验·139air-conditioningsystems,whilethecoolingcapacityisreduced129/6.Goswami,etc.[一studiedtheper—formanceenhancementofsmallandmedium-sizedair_condoning,thestudyfoundthatevaporativecoolingraisethetemperaturedrivingforceofthecondensercooling,butcomparedwiththeair-condi—tioningsystemwithoutevaporativecooling.thepowerconsumptionhasbeenincreased2O.Thecon—densersusedofair-cooled,water-cooledandevaporativecoolingrespectively...

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