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1、半封閉螺桿冷水機組與開啟式螺桿冷水機組比較項目半封閉螺桿冷水機組開啟式螺桿冷水機組壓縮機型式1，不需專門采用軸封，不存在冷媒泄露問題2，電機采用冷媒冷卻，電機運行環(huán)境好，清潔度高，壽命長，運行溫度不受外界環(huán)境的影響，而且始終保持較高的運行效率。3，機房無需專門的通風設備。1，需要專門采用軸封，不存在冷媒泄露問題2，電機采用空氣冷卻，電機運行環(huán)境差，清潔度低，壽命短，運行溫度受外界環(huán)境的影響，運行效率低。3，機房需專門的通風設備。密封型式采用噴油密封壓縮腔體，同時噴液態(tài)制冷劑以降低排氣溫度，提高機組
2、效率。無此裝置，機組效率低。節(jié)流裝置采用電子膨脹閥進行能量調節(jié)，調節(jié)精度高，機組在部分負荷下效率高。采用熱力膨脹閥，調節(jié)精度低，同時部分負荷效率低油路潤滑采用壓差供油，無需油泵，油冷等外部連接件，系統簡潔，無須進行維護采用油泵供油，需配置油泵，油冷等外部連接件，系統復雜，須每年進行維護機組設計采用2臺壓縮機設計，由于每臺壓縮機采用獨立回路，當一臺壓縮機出現故障時，另一臺仍可正常工作。單臺壓縮機獨立系統，壓縮機出現故障必須停機維修Semi-closedscrewchillerandopenedscr
3、ewchillercomparisonItemSemi-closedscrewchillerOpenedscrewchillerCompressortype1.withoutusingspecialsealequipment,andthereisnoquestionofrefrigerantleak2.themotorcooledbyrefrigerant,operatingingoodenvironment,cleanliness,longlife,besides,operatingtemper
4、aturewithoutexternalenvironmentalimpacts,andalwaysmaintainsahigheroperatingefficiency.3.theengineroomwithoutspecialventilationequipment.1.needforspecialsealequipment,andthereisnoquestionofrefrigerantleak2.themotorcoolesbyair,operatinginpoorenvironment
5、,cleanlinesslow,shortlife,besides,outsideenvironmentalaffactsoperatingtemperature,andlowoperatingefficiency.3.theengineroomrequiredspecializedventilationequipment.SealdevicetypeSealedbyinjectioncompressionchamber,andsprayliquidrefrigeranttoreducetheex
6、hausttemperature,andincreaseunit’sefficiency.Theabsenceofsuchadevice,andlowefficiency.ThrottleDevicesUsingelectronicexpansionvalveforenergyregulation,andtheunithashighefficiencyundersomeload.Usingthermalexpansionvalveforenergyregulation,andtheunithasl
7、oweffcicencyunderload.OilcircuitlubricationForusingoilpressuretosupplyoil,theunithasnopumps,oilcooling,andotherexternalconnections,andthesystemissimplewithoutmaintenance.Forusingoilpumptosuppplyoil,theunitmusthasconfiguredpumps,oilcooling,andotherexte
8、rnalconnections,andthesystemiscomplicated,subjectedtoannualmaintenance.UnitDesign2compressorsbydesign,thankstoeachcompressorusedindependentcircuit,whenacompressorfailure,anothercanstillworkproperly.展勤浩@139.comSinglecompressorindependentsystems
