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简介：ThispapermainlydiscussestheproblemsexistinginthetraditionaldesignprocessoftherefrigerationstationandtriestosolvethemwithBIMtechnology.ConsideringthecharacteristicsofBIMtechnology,BIMdesignprocessispresentedbasedonthetraditionaldesignprocesstoachievethegoalofimprovingdesignqualityandefficiency.

简介：以便学习理论周期特征[mmim]/methanol吸收制冷，修改UNIFAC组贡献模型和威尔森建模的DMP(1-methyl-3-methylimidazoliumdimethylphosphate)通过相关被建立试验性的蒸汽压力数据[mmim]在T=280370K和甲醇鼹鼠部分x=的DMP/methanol0.5290.965。利用的吸收制冷的热力学的表演[mmim]DMP/methanol，LiBr/H2O和H2O/NH3被调查，与对方相比，在一样下面操作调节。从结果，一些结论如下被获得：1)发行量比率[mmim]DMP/methanol吸收制冷比LiBr/H2O吸收制冷的高，但是能仍然可接受、可容忍。2)警察[mmim]DMP/methanol吸收制冷比LiBr/H2O吸收制冷，当它比H2O/NH3吸收的高时，在最操作下面的制冷调节的小。3)[mmim]当热来源温度太高，不能驾驶LiBr/H2O吸收制冷时，DMP/methanol吸收制冷与高级警察一起仍然是可得到的。

简介：Inordertoidentifythelocationsofirreversiblelosswithinthetranscriticalcarbondioxiderefrigerationcyclewithanexpansionturbine,amethodwithrespecttothesecondlawofthermodynamicsbasedonexergyanalysismodelisapplied.Theeffectsofheatrejectionpressures,outlettemperaturesofgascoolerandevaporatingtemperaturesontheexergyloss,exergyefficiencyandthecoefficientofperformance(COP)oftheexpansionturbinecycleareanalyzed.Itisfoundthatthegreatpercentagesofexergylossestakeplaceinthegascoolerandcompressor.Moreover,heatrejectionpressures,outlettemperaturesofgascoolerandevaporatingtemperatureshavestronginfluenceontheexergyefficiency,COPandtheexergylossofeachcomponent.TheanalysisshowsthatthereexistsanoptimalheatrejectionpressurecorrespondingtothemaximumexergyefficiencyandCOP,respectively.Theresultsareofsignificanceinprovidingtheoreticalbasisforoptimaldesignandthecontrolofthetranscriticalcarbondioxidesystemwithanexpansionturbine.

简介：ＳｔｕｄｙｏｎＧｄＡｌＤｙＳｙｓｔｅｍＭａｇｎｅｔｉｃＲｅｆｒｉｇｅｒａｔｉｏｎＭａｔｅｒｉａｌｓＣｈａｎｇＸｉｕｍｉｎ，ＹａｎＪｕｎｌｉａｎ（常秀敏）（闫俊联）ＢｅｉｊｉｎｇＧｅｎｅｒａｌＲｅｓｅａｒｃｈＩｎｓｔｉｔｕｔｅｆｏｒＮｏｎｆｅｒｒ...

简介：Chlorofluorocarbons(CFCs)orhydrochlorofluorocarbons(HCFCs)areasmainrefrigerantsusedintraditionalrefrigerationsystemsdrivenbyelectricityfromburningfossilfuels,whichisregardedasoneofthemajorreasonsforozonedepletion(man-maderefrigerantsemission)andglobalwarming(CO2emission).Sopeoplepaymoreandmoreattentiontonaturalrefrigerantsandenergysavingtechnologies.AninnovativesystemcombiningCO2transcriticalcyclewithejectorcycleisproposedinthispaper.TheCO2compressionsub-cycleispoweredbyelectricitywiththecharacteristicsofrelativelyhightemperatureinthegascooler(definedasanintercoolerbytheproposedsystem).Inordertorecoverthewasteheat,anejectorsub-cycleoperatingwiththenaturalrefrigerants(NH3,H2O)isemployed.Thetwosub-cyclesareconnectedbyanintercooler.Thiscombinedcyclejoinstheadvantagesofthetwocyclestogetherandeliminatesthedisadvantages.TheinfluencesoftheevaporationtemperatureinCO2compressionsub-cycle,theevaporationtemperatureintheejectorsub-cycle,thetemperatureintheintercoolerandthecondensationtemperatureintheproposedsystemperformancearediscussedtheoreticallyinthisstudy.Inaddition,someuniquefeaturesofthesystemarepresented.

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