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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-cooling,space-heating.Comparativel
2、y,thesystemcanprovidemuchbetterenergyperformanceandhigherequipmentutilizationthroughoutayear,andcauselessthermalpollutionthanheatpumpwaterheaterandcommonairconditioner.Aprototypewithfivemodeswasassembledandtestedattheambienttemperaturefrom-7℃to43℃,especiallywhenfrosting.Whenitworksinthewater-heat
3、ingmode,itcansupply55℃hotwaterwithintwominutes,andthecondensingpressureisjustsamewithcommonairconditioner.Whensomemodesswitch,thetemperatureoftheoutlethotwaterisconstant.TheoreticalanalysisandexperimentalstudyweredonetotheACWHinthisthesis:1.Theprototypewastestedintheair-conditionerlaboratoryofGRE
4、E.Thetestingdataindicatethattheprototypeaccordswellwiththenationalstandardsofairconditionerandheatpumpwaterheater.2.Basedontheexperimentalresults,analysiswasdoneontheACWHinmainoperatingmodesandsomeimportantconclusionsweregiven，Theresultsindicatethatthenewsystemcansaveenergythroughmulti-duties,and
5、itcanworkstablyinfiveworkmodeswithhighefficiency.Comparedwithothermodels,thenewsystemalsoincludesair-conditioningunitandwaterheaterunit,butwithfewercomponentsandhigherreliability.Basedoncommonairconditioner,thissystemcanofferapracticablesolutioncouplingairconditionerandwaterheater.Itmustbechangin
6、gthemarketsofbothairconditionerandwaterheater.1.INTRODUCTIONTheheatpumpwaterheater(HPWH)hasbeenusedsince1950s,mainlyforhouseholdapplications.Itabsorbsheatenergyfromtheambientairtoacquirehotwater.Inthelast20years,thestudyintendstodesignheatpumpwaterheaterwithhighreliabilityandpracticability,andman
7、ymanufacturersturntoofferthisproductionbasedonenvironmentalprotectionandenergysaving.InSouthAfrica,HPWHhaspenetrated16percentofthemarketshareforcommercialwaterheaters.Becauseofthehighlyprimarycost,itisdifficulttobecome
