建筑环境与能源应用工程专业英语.ppt

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1、1LessonSevenRefrigerationandRefrigerants2TopicsRefrigerationtheoryandevaluate1AirpollutionbyRefrigerants2Compressors3344TextandkeywordslearningUsagesandExpressions353RefrigerationandheatpumpHightemperatureLowtemperatureRefrigerationEnergyTHTLQHQLHightemperat

2、ureLowtemperatureHeatpumpEnergyTHTLQHQLSummerindooroutdoorWinteroutdoorindoorTopicone:Refrigerationtheoryandevaluate4vaporcompressionsystem56IndoorheatexchangerCompressorExpansionvalve四通换向阀Four-wayReversingValveOutdoorheatexchanger7EntropyAbsolutetemperature

3、1234TheoreticalVaporCompressionRefrigerationCycle1-2Thecoldsaturatedvaporatstate1iscompressedisentropicallytothehightemperatureinthecycleatstate2.2-3Thecycleiscompletedbyanisothermalandisobaricheatrejectionorcondensingprocessfromstate2tostate3.3-4Saturatedli

4、quidatstate3expandsisenthalpicalytothelowtemperatureandpressureofthecycleatstate4.4-1Heatisaddedisothermallyandisobaricallybyevaporatingtheliquidphaserefrigerantfromstate4tostate1.EnthalpyPressure12348COP:CoefficientofPerformanceEER:EnergyEfficiencyRatioHSPF

5、:HeatingSeasonalPerformanceFactorSEER:SeasonalEnergyEfficiencyRatio9absorptionsystemwaterlithiumbromideammoniawater1011OzoneDepletion!反应输入物反应产物反应催化剂Topictwo:AirpollutionbyRefrigerants12decreaseincreasetemperatureincreaseatmosphereearthGlobalWarming!Greenhous

6、egases13141.RefrigerationandRefrigerationSystemsdefinition&classificationofRefrigerationSystems2.Refrigerants,CoolingMediums,andAbsorbentsdefinition&standardrefrigerantdesignations3.ClassificationofRefrigerantsclassificationofrefrigerantsbasedonozonedepletio

7、n4.PhaseoutofCFCs,BFCs,HCFCs,andTheirBlendshistoryofthephaseoutsomealternativesTopicFour:Textlearningandkeywords15refrigeration制冷refrigerationsystem制冷系统refrigerant制冷剂coolingmedium冷却介质vaporcompressionsystem蒸气压缩式系统absorptionsystem吸收式系统gasexpansionsystem气体膨胀式系统

8、ozonedepletionpotential(ODP)臭氧消耗潜能globalwarmingpotential(GWP)全球变暖潜能absorbent吸收剂brine盐水hydrocarbon碳氢化合物halocarbon卤代烃phaseout逐步停用或淘汰alternative替代物Hydrofluorocarbons(HFCs)氢氟烃Hydrochlorofluorocarbon