螺杆式冷水会机组设计

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1、河南理工大学本科毕业设计（论文）说明书摘要随着我国国民经济的发展，大中型制冷空调装置的需求日益增多。螺杆冷水机组广泛应用于大型中央空调系统中。企业在购买中央空调时，由于市场上中央空调的类型繁多，如何选择制冷机组的配套设备并使其高效运行成为关键。本文以制冷量为1000kW的螺杆冷水机组选型为基础，冷却水进水温度为，目的是制出的冷冻水。本文首先论述了大功率冷水机组的发展概况，说明了大功率螺杆式冷水机组具有广阔的市场、巨大的发展潜力。接着围绕提高产品的能源利用效率，实现机组的高效运转，对各个部件进行分析设计。重点进行了冷凝器和蒸发器的热力计算，同时进行了压缩机、

2、膨胀阀及其辅助设备的选型设计及管道的设计计算。制冷剂选择适合大型空调机组的氟利昂R22；压缩机选择高效可靠的半封闭式螺杆压缩机；冷凝器为卧式壳管式冷凝器，传热管为滚轧低肋管；蒸发器采用干式结构，采用内微肋管；节流阀采用ETS系列电子膨胀阀，同时进行了油分离器、视液镜、冷却塔、贮液器等相关辅助设备的选型；最后，采用公式法进行了管道的设计计算，并估算了制冷剂的充贮量。关键词：螺杆冷水机组，壳管式冷凝器，干式蒸发器，半封闭式螺杆压缩机，ETS系列电子膨胀阀66河南理工大学本科毕业设计（论文）说明书ABSTRACTWiththedevelopmentofourna

3、tionaleconomy,thedemandforlargeandmediumsizedrefrigerationandairconditioningdevicesisincreasing.Screwchillerarewidelyusedinlargecentralairconditioningsystems.Duetoawidevarietyofcentralair-conditioninginthemarket,howtochoosetheancillaryequipmentrefrigerationunitsandmakethemruneffic

4、ientlybecomesthekeywhenenterprisesinthetimeofpurchasingcentralairconditioningdevices.Thispaperisonthebasisofscrewchillerwiththecoolingcapacityof1000kWandthecoolingwaterinlettemperatureis32℃.Thepurposeistomakeoutof7℃frozenwater.Thepaperfirstdiscussesthedevelopmentofhighpowercapacit

5、ywaterchillers,illustratingthehighpowercapacityscrewchillerhasabroadmarketandhugepotentialdevelopment.Thenfocusingonimprovingtheenergyefficiencytoachieveefficientlyoperatestoanalyzetherespectivecomponents.Conductingemphasisonthermodynamiccalculationofcondenserandevaporator,acompre

6、ssor,atthesametime,doingexpansionvalveandauxiliaryequipmentsdesignandpipelinecalculations.TherefrigerantselectFreonR22whichissuitableforlargeairconditioningunits;compressoristhehighlyefficientandreliablesemi-hermeticscrewcompressor;thecondenserisahorizontalshellandtubecondenserwit

7、hheattransfertubesislowrollingribbedpipes;evaporatoradoptsdrystructure,usingthemicro-fintubes;expansionvalveusesETSserieselectronicexpansionvalves,atthesametimeselectoilseparators,sightglass,coolingtowers,liquidreservoirandotherrelatedauxiliaryequipments;Finally,usingtheformulamet

8、hodtodesignpipelineandestimatesth