蒸发式冷凝器空调系统性能实验VIP免费

№．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...