第32卷第6期土木建筑与环境工程Vol.32No.62010年12月JournalofCivil,Architectural&EnvironmentalEngineeringDec.2010采用旁通阀定压差控制的冷水泵功耗特性试验研究刘金平a,b,邹伟a,刘雪峰a(华南理工大学a.电力学院;b.亚热带建筑科学国家重点实验室,广州510640)摘要:对采用旁通阀定压差控制的某办公楼变流量空调冷水泵功耗进行了研究。首先建立了一次泵的功耗模型,计算了旁通阀压差设定值对变速冷水泵瞬时功耗和全年功耗的影响,并与实验数据进行了对比。结果表明,旁通阀的定压差平衡状态存在一个上限流量,其值随压差设定值单调增加,同时其工作压力可划分3个特性区:欠压区、定压区和超压区;旁通阀的压差设定值对变速冷水泵的运行有显著影响,当旁通阀压差设定值取最远端用户的供回水压差时,变速冷水泵的功耗最小。关键词:冷水泵;旁通阀;压差;功耗中图分类号:TU831.3文献标志码:A文章编号:16744764(2010)06008006ExperimentalAnalysisonPowerConsumptionofChilledWaterPumpbyConstantPressureDifferenceMethodwithBypassValveLIUJinpinga,b,ZOUWeia,LIUXuefenga(a.SchoolofElectricPower;b.StatekeyLaboratoryofSubtropicalBuildingScience,SouthChinaUniversityofTechnology,Guangzhou510640,P.R.China)Abstract:Thepowerconsumptionoffrequencyconversionchilledwaterpumpofanofficebuildingregulatedbyconstantpressuredifferencemethodwithbypassvalveisstudiedexperimentally.Amodelofpowerconsumptionofchilledwaterpumpisproposed.Theeffectsofpressuredifferencesetpointofbypassvalveoninstantaneousandannualpowerconsumptionofchilledwaterpumpareanalyzed.Thesimulationresultsarevalidatedexperimentally,whichshowsthatthereisamaximumwaterflowratewhichincreaseswiththeincreaseofthepressuredifferencesetpointofbypassvalveatequilibriumstate.Therearethreepressureoperationregionsofthebypassvalve:underpressureregion,constantpressureregionandoverpressureregion.Thepowerconsumptionoffrequencyconversionchilledwaterpumpisaffectedbythepressuredifferencesetpointofbypassvalvesignificantly,anditwouldbeminimizedasthepressuredifferencesetpointofbypassvalveisequaltothepressuredifferencebetweensupplywaterandreturnwaterofthefarthestuser.Keywords:chilledwaterpump;bypassvalve;pressuredifference;powerconsumption冷水泵的运行效率不仅取决于水泵自身的设手册第41章暖通应用[3]中提出,变速冷水泵的速度计,还取决于整个空调系统的设计和冷水泵的工作控制,实际上是要维持冷冻供回水干管的压差恒定。条件[12]。对冷水泵的功耗研究应针对不同空调系变流量压差旁通就是一个典型代表,它以保持供回统和工作条件进行具体分析。在2007年ASHRAE水干管压差恒定,使冷水泵输出的水量等于空调末收稿日期:20100505基金项目:十一五国家科技支撑计划重大项目经费资助(2006BAJ03A06)作者