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1、摘要摘要建设节约型社会,合理开发、节约利用和有效保护水资源是一项艰巨任务。根据高校用水时间集中,用水量变化较大的特点,分析了校园原供水系统存在成本高,可靠性低,水资源浪费,管网系统待完善的问题。提出以利用自来水水压供水与水泵提水相结合的方式,并配以变频器、软启动器、PLC、微泄露补偿器、压力传感器、液位传感器等不同功能等传感器,根据管网的压力,通过变频器控制水泵的转速,使水管中的压力始终保持在合适的范围。从而可以解决因楼层太高导致压力不足及小流量时能耗大的问题。另外水泵耗电功率与电机转速的三次方成正比关
2、系,所以水泵调速运行的节能效果非常明显,平均耗电量较通常供水方式节省近四成。结合使用可编程控制器,可实现主泵变频,副泵软启动,具有短路保护、过流保护功能,工作稳定可靠,大大延长了电机的使用寿命。关键词:恒压变频供水,PLC,压差供水,自动控制-7-ABSTRACT论文字数过多,建议缩减内容,论文题目拟完整,论文封面有统一标准,论文页眉可以删除,论文格式基本正确,选题正确,但内容不贴合你的实践内容,建议重新调整论文内容,注意不要照搬照抄,修改后及时发给我。-7-ABSTRACTABSTRACTBuildi
3、ngtheconservation-orientedsociety,thereasonabledevelopment,savesandtheeffectiveprotectingwaterresourcesisanarduoustask.Becentralizedaccordingtotheuniversitywaterusedtime,thewaterconsumptionchangemajorcharacteristic,analyzedthecampusoriginalwatersupplysys
4、temexistencecosttobehigh,thereliabilitywaslow,thewaterresourceswaste,thepipenetworksystemtreatedtheconsummationthequestion.Proposedthatdrawswaterthewaywhichusingtherunningwaterhydraulicpressurewatersupplyandthewaterpumpunifies,andmatchesbytheinverter,the
5、softstarter,PLC,Microrevealsthecompensator,thepressuretransmitter,thefluidpositionsensorandsoon.accordingtothenetworkmanagementpressure,controlswaterpump'srotationalspeedthroughtheinverter,causesinwaterpipe'spressuremaintainsatthroughouttheappropriatesco
6、pe,thusmaysolvetheproblemwhichthefloorhighpressureistooinsufficientwhensmallcurrentcapacitytheenergyconsumptionisbig.Moreoverthewaterpumpconsumestheelectricpowerandtheelectricalmachineryrotationalspeedisproportionalthreecubedtherelations,thereforethewate
7、rpumpvelocitymodulationmovement'senergyconservationeffectisobvious,theaveragepowerconsumptionusualwatersupplywaysaves40%.Theunionusestheprogrammablecontroller,mayrealizethemainpumpfrequencyconversion,theauxiliarypumpsoftstart,hastheshortcircuitprotection
8、,theoverflowprotectionfunctionstably,theworkreliable,lengthenedelectricalmachinery'sservicelifegreatly.Keywords:Constantpressurefrequencyconversionwatersupply,PLC,differentialpressurewatersupply,automaticcontrol-7-目录-7-目录目