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1、吸收式制冷BSORPTIONREFRIGERATION----计算机英语论文-->INTRODUCTIONTheabsorptioncycleisaprocessbyequantityofheatinput,ratherthanelectricalinputasinthemorefamiliarvaporpressioncycle.Bothvaporpressionandabsorptionrefrigerationcyclesacplishtheremovalofheatthroughtheevaporationo
2、farefrigerantataloethodofcreatingthepressuredifferenceandcirculatingtherefrigerantistheprimarydifferencebetploysamechanicalpressortocreatethepressuredifferencesnecessarytocirculatetherefrigerant.Intheabsorptionsystem,asecondaryfluidorabsorbentisusedtocirculatet
3、herefrigerant.Becausethetemperaturerequirementsforthecyclefallintothelooderatetemperaturerange,andthereissignificantpotentialforelectricalenergysavings,absorptiontobeagoodprospectforgeothermalapplication.Absorptionmachinesaremerciallyavailabletodayintarilyairco
4、nditioning),thecycleuseslithiumbromideastheabsorbentandmonia/ployedmoniaastherefrigerantandofatypicallithiumbromide/achine(LiBr/H2O).Theprocessoccursintediumisusedtocondensethevaporbacktoaliquidstate.Theaintainingaveryloperature.Thisboilingcausesthethemediumtob
5、ecooled,thus,loperature.Evaporatedixedtheevaporatorsectiontoformae.Thepedtothegeneratorsectiontorepeatthecycle.AsshowninFigure1,therearethreefluidcircuitsthathaveexternalconnections:a)generatorheatinput,b)coolingwater,andc)chilledwater.Associatedwitheachofthese
6、circuitsisa-->specifictemperatureatachinesarerated.Forsingle-stageunits,thesetemperaturesare:12psisteam(orequivalenthotance(COP)ofapproximately0.65to0.70couldbeexpected(ASHRAE,1983).TheCOPcanbethoughtofasasortofindexoftheefficiencyofthemachine.Itiscalculatedbyd
7、ividingthecoolingoutputbytherequiredheatinput.Forexample,a500-tonabsorptionchilleroperatingataCOPof0.70,or1,008gpmof240°Fachinesperaturerequirementsfortheseareperaturerange(350°F).Asaresult,tachinesalapplications.PERFORMANCECONCLUSIONInconclusion,itisnecessaryt
8、oevaluatethefolloal/absorptioncoolingapplicationforspaceconditioning.ResourcetemperatureSubstantialderatingfactorsmustbeappliedtoequipmentattemperatureslessthan220°F.Veryhig
