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制冷系統(tǒng)組成Vapor-CompressionRefrigerationexpansion

devicecondensercompressorevaporator第一部分

制冷循環(huán)制冷系統(tǒng)組成AB壓力焓蒸發(fā)制冷循環(huán)ACcompressorpressureenthalpyevaporator制冷循環(huán)BAcondenserpressureenthalpyevaporator制冷循環(huán)BCcompressorDexpansiondeviceADcondenserpressureenthalpyevaporator制冷循環(huán)BCcompressor第二部分冷凝器制冷系統(tǒng)組成subcooleroutdooraircondensercoilpropellerfan風冷式冷凝器ADpressureenthalpyBCEffectofSubcoolingAI{subcoolingrefrigerationeffectDI離心式風扇--風冷式冷凝器centrifugalfancondensercoil蒸發(fā)式冷凝器sumppumpcondensercoilrefrigerantvaporsubcoolerfanliquidrefrigerantcoolingwatersubcooled,liquidrefrigerantsubcooler水冷式冷凝器hot,refrigerantvapor29oC35oC冷卻塔spraysfrom

condenserto

condensersumppropellerfanoutdoorair29oC35oCfill冷凝器控制Condensercapacityisinfluencedby:TemperaturedifferencebetweenrefrigerantandcoolingmediaFlowrateofcoolingmediathroughcondenserFlowrateofrefrigerantthroughcondenserpressureenthalpyfullloadcondenserheatrejectioncapacitypartloadfullloadCondenserCapacitypartloadcondenserheatrejectioncapacity冷凝溫度控制condenserwaterpumpflow-regulatingvalvecondenser可變冷凝器水流量coolingtowercondenservariable-speeddrivecondensercoolingtowerbypasspipedivertingvalvecoolingtowercondenservariable-speeddrivecondensercoolingtowerbypasspipedivertingvalve可變進水溫度condenserbypasspipecoolingtower冷卻塔旁通divertingvalve4oC18oC13oC風冷式冷凝器控制heatrejectioncapacitycondenserairflowfanAfanBfanAdamperAB冷凝器溢流控制evaporatorcompressorliquidreceiverBACcondenserexpansion

valvedischargeline第三部分蒸發(fā)器制冷系統(tǒng)組成Finned-TubeEvaporatorrefrigerantvaporliquid/vaporrefrigerantairflowTurbulentFlowFinned-TubeEvaporatorliquid/vaporrefrigerantrefrigerantvaporliquiddistributorairflowsuctionheaderSuperheatsuperheat{ACBACBShell-and-TubeEvaporatorrefrigerantvaporchilledwaterreturnchilledwatersupplytubebundlebafflesliquid/vaporrefrigerantShell-and-TubeEvaporatorbafflesEvaporatorControlEvaporatorcapacityisinfluencedby:TemperaturedifferencebetweenrefrigerantandairorwaterbeingcooledFlowrateofairorwaterthroughevaporatorFlowrateofrefrigerantthroughevaporatorFinned-TubeEvaporatorControlexpansionvalverefrigerantvaporevaporatorliquidrefrigerantFace-SplitArrangementdistributorsFace-SplitArrangement27oC-1.1oC13oCinactivecoilactivecoil27oCIntertwinedArrangementRow-SplitArrangementRow-SplitArrangement27oC13oC21oCShell-and-TubeEvaporatorControlrefrigerantvaporliquidrefrigerantexpansionvalveshell-and-tubeevaporator第四部分膨脹裝置制冷系統(tǒng)組成膨脹裝置expansiondeviceADcondenserpressureenthalpyevaporatorBCcompressor熱力膨脹閥熱力膨脹閥(TXV)液汽混合物制冷劑氣體蒸發(fā)器A液體制冷劑TXVControlliquid/vapormixturerefrigerantvaporAliquidrefrigerantTXVControlliquid/vapormixtureliquidrefrigerant過熱superheatedvaporTXV2MPa,42.8oC0.59MPa,5oCAliquidrefrigerant過熱TXV9.4oC0.54MPa2MPa,42.8oC0.59MPa,5oCTXVOperationexternalequalizerremotebulbevaporatorspringsuctionlinedistributordiaphragmTXVOperationvalvepinsuctionlinespring94oC0.54MPa0.67MPa0.54MPa0.13MPavalvediaphragmTXVOperationTXVexternalequalizerremotebulbABCSuperheatSettingToolittlesuperheat:RiskofdamagetocompressorbyliquidrefrigerantToomuchsuperheat:ReductionofsystemefficiencyPotentialofcoilfrostingRiskofcompressordamageduetooverheating第五部分附件制冷系統(tǒng)組成電磁閥電磁閥finned-tubeevaporatorsolenoidvalvesexpansionvalve電磁閥solenoidvalveexpansionvalveevaporatorliquidlinecondensercompressordischargelinesuctionline液體管干燥過濾器solenoidvalveexpansionvalveliquid-linefilterdrierevaporatorliquidline液體管干燥過濾器replaceablecoretypesealedtypecore濕度指示視液鏡sightglassexpansionvalveliquidline吸氣管過濾器suctionlinefiltercompressorsuctionline吸氣管過濾器replaceablecoretypesealedtype排氣消聲器hotgasmufflerreciprocatingcompressordischarge

lineshellperforatedtube截止閥shutoffvalveshutoffvalvesliquidlinecondensercompressorshutoffvalveliquid-linefilterdrierevaporator檢修口liquidlineaccessportsuctionlineaccessportscondensercompressorevaporator第六部分復習制冷系統(tǒng)組成復習—第一部分expansiondeviceADcondenserpressureenthalpyevaporatorBCcompressor復習—第二部分air-cooled

condenserwater-cooledcondenserevaporativecondenser復習—第三部分finned-tubee

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