高溫?zé)岜脽崃μ匦匝芯?pdf

1、上海交通大學(xué)碩士學(xué)位論文高溫?zé)岜脽崃μ匦匝芯啃彰豪钪侨A申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：制冷與低溫工程指導(dǎo)教師：連之偉20050101申請(qǐng)上海交通大學(xué)碩士學(xué)位論文ABSTRACTIIRESEARCHOFTHERMALPERFMANCEOFTHEHIGHTEMPERATUREHEATPUMPABSTRACTWiththeenergysavingconceptrootedhightemperatureheatpumpdemincreasing.Bu

2、tintheengineeringfieldtheheatpumpunitsalwayslossitsefficiencyeconomywhenCOPdecreasedrasticallybyincreasethecoolingwatertemperaturedifference.Inthispaperwehavedonesometestsoftheheatpumpwhichrunningatcriticalcyclefresearch

3、ingitsthermalperfmanceatdifferentconditions.Thetestshavebeencarriedoutatdifferentcoolingwaterinlettemperaturefcomparingtheunit’sperfmance.Changingthewaterflowrateatcertaincooingwaterinlettemperaturefgettingthetestresulto

4、fdifferentthermalcycleconditionstocompareCOPindifferentconditionoftemperaturedifference.Atacertainflowratewegotthetestresultindifferentheatexchangetypebychangingthecoils’configurationincondenser.Atcertaincoolingwaterinle

5、ttemperaturecertaincondenserconfigurationwegetthetestresultofCOPindifferentcycleregenerativebydifferentbypassopening.Testresultindicated:thiscriticalcyclehightemperatureheatpumpcansupplyhightemperaturebyutilizingthesensi

6、bleheatbetweenthecompressoutletsaturatecondensingline.AtacertaincoolingwatertemperaturerisetheCOPvalueincreasewiththecoolingwaterinlettemperatureincrease.WhentheinletcoolingwatertemperaturefixedtheCOPvaluedecreaseslittle

7、attheconditionofcoolingwatertemperaturerisegreaterthan50.Comparetogeneralheatpumpthisexperimentbenchisnonsensitivetocoolingwatertemperaturerise.Condenserconfigurationshouldbefitfthecounterflow.Thisconfigurationcanreducet

8、heheatlossduringheatexchangeprocess.Theheatpumpunitscansupplyhightemperaturehotwaterwhenitoperatingatrefrigerationcyclewithregenerative.ButtheCOPvalueishigherwhenitrunningatrefrigerationcyclewithoutregenerative.Attheendo