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1、外文翻译（英文原文）ABSTRACTTheworkingprinciplesandthebasicfeaturesofairconditioningwaterheater(ACWH)systemareintroducedinthispaper.Theairconditioningwaterheatersystemcanoperateinfivemodes:water-heatingonly,space-coolingandwater-heating,space-heatingandwater-heating,space-c
2、ooling,space-heating.Comparatively,thesystemcanprovidemuchbetterenergyperformanceandhigherequipmentutilizationthroughoutayear,andcauselessthermalpollutionthanheatpumpwaterheaterandcommonairconditionerAprototypewithfivemodeswasassembledandtestedattheambienttemperat
3、urefrom・7°Cto43°C，especiallywhenfrosting.Whenitworksinthewater-heatingmode,itcansupply55°Chotwaterwithintwominutes,andthecondensingpressureisjustsamewithcommonairconditioner.Whensomemodesswitch,thetemperatureoftheoutlethotwaterisconstant.Theoreticalanalysisandexpe
4、rimentalstudyweredonetotheACWHinthisthesis:1.Theprototypewastestedintheair-conditionerlaboratoryofGREE.Thetestingdataindicatethattheprototypeaccordswellwiththenationalstandardsofairconditionerandheatpumpwaterheater.2.Basedontheexperimentalresults,analysiswasdoneon
5、theACWHinmainoperatingmodesandsomeimportantconclusionsweregiven,Theresultsindicatethatthenewsystemcansaveenergythroughmulti-duties,anditcanworkstablyinfiveworkmodeswithhighefficiency.Comparedwithothermodels,thenewsystemalsoincludesair-conditioningunitandwaterheate
6、runit,butwithfewercomponentsandhigherreliability.Basedoncommonairconditioner,thissystemcanofferapracticablesolutioncouplingairconditionerandwaterheater.Itmustbechangingthemarketsofbothairconditionerandwaterheater.1.INTRODUCTIONTheheatpumpwaterheater(HPWH)hasbeenus
7、edsince1950s,mainlyforhouseholdapplications.Itabsorbsheatenergyfromtheambientairtoacquirehotwater.Inthelast20years,thestudyintendstodesignheatpumpwaterheaterwithhighreliabilityandpracticability,andmanymanufacturersturntoofferthisproductionbasedonenvironmentalprote
8、ctionandenergysaving.InSouthAfrica,HPWHhaspenetrated16percentofthemarketshareforcommercialwaterheaters.Becauseofthehighlyprimarycost,itisdifficulttobeco
