非共沸混合制冷劑在高溫空調(diào)中的實驗研究.pdf

1、合肥工業(yè)大學(xué)碩士學(xué)位論文非共沸混合制冷劑在高溫空調(diào)中的實驗研究姓名：趙鵬申請學(xué)位級別：碩士專業(yè)：制冷與低溫工程指導(dǎo)教師：王鐵軍20100401TheExperimentalStudyonNonazeotropicRefrigerantinHighTemperatureAir—ConditionerAbstractHightemperatureair—conditonersoftenrunoverawidetemperaturerange

2、andinhightemperatureworkconditions，SOsomecommonlyusedmid—temperaturerefrigentsarenotsuitableforhightemperatureanylongerItisakeyfactertosearchforaproperkindofrefrigenttosolvetheproblemsofdevelopingandmanufacturinghightemp

3、eratureairconditioners，whichisenvironmentallyfriendlyandhasgoodthermodynamicpropertiesThemajorworkofthisthesiswastofindaproperkindofrefrigentwhichissuitableforcirculatinginhightemperatureairconditionersNonazeotropicmixtu

4、reR22／R142b’Spropertieswereanalyzedinthisthesisatfirst，anditwasfoundthatitisfeasibleforhightemperatureair—conditionerstouseintheory，andnotonlythethermodynamicpropertiesofitarefairlygoodbutalsoitisenvironmentallyfriendlyB

5、yusingR22／R142b’Sthermodynamicproperties，themaincomponentsofthehightemperatureairconditionerswhichoriginallyusedR12asworkingfluidswerecheckedandanalyzedThenthevariationoftherunningperformancewithdifferentmassfractionswas

6、studiedbymethodofexperimentandsimulationItwasfoundthatthecoolingcapacityisfairlyhighandchangessmoothlyoverawidetemperaturerangeof30475。CwhenthemassfractionsofR22／R142brangefrom5／5to7／3；Besides，boththeexhausttemperaturean

7、dtheexhaustpressurearenotSOhighthattheycandamagetheairconditionerMeanwhile，Theoptimalrefrigerantchargewasalsotestedinhightemperatureworkconditionsinthisthesis，asaresult，thesamplemachineranrelativelywellwhentherefrigentch

8、argewasabout265kgGoodideaandmethodsfortheimprovementofhightemperatureair。conditioners，onthepremiseofrelativelylowcostinthetechnologicaltransformation，wereprovidedthroughthestudyontherefrigerantreplacementinhightemperatur