空调系统节能优化运行与改造案例研究-2-冷水系统(1)

空调系统节能优化运行与改造案例研究(2):冷水系统*清华大学常晟魏庆芃蔡宏武谢俊骏太古地产有限公司陈永康吴稼培陈盛业从实例中旁通管逆流的现象出发,说明了末端侧冷水大流量小温差不仅影响冷水侧输送效率,且会对冷水机组运行造成不利影响大流量小温差现象根源在于末端的不合理需求与水系统的过度供给,在改造时应从末端和压差设定点控制两方面入手以实际工程为例,说明了水系统诊断与改造的全过程与实际的改造效果水系统小温差冷水机组群控节能改造CasestudyonHVACenergyefficientoptimizationandrenovation(PartII):ChilledwatersystemByChangCheng,WeiQingpeng,CaiHongwu,XieJunjun,ChanCary,WuMichaelandChanJasonAbstractStartswiththeoccurrenceofbackflowinbypasspipeinacase,illustratesthatchilledwateroflargeflowrateandsmalltemperaturedifferenceinusersidenotonlyaffectsthechilledwatertransportingefficiency,butalsoadverselyaffectsthechiller!soperation.Theproblemisattributedtotheirrationaldesigneddemandofterminalsandoversupplybychilledwatersystem.Bothoftheterminalsandchilledwatersystemdifferentialpressuresetpointsshouldbeoptimizedinrenovation.Withanactualexample,presentstheprocessofchilledwatersystemdiagnosisandrenovationanditsenergysavingeffect.Keywordschilledwatersystem,smalltemperaturedifference,chillergroupcontrol,energyefficientreformTsinghuaUniversity,Beijing,China*∀#∀#(:2006BAJ01A00)∃0,,∀#,,,,,,,,,11.1,1,;,,%37%暖通空调HV&AC2010年第40卷第8期∃,,19859,100084(010)62775553Email:[e-mail]:2010061111.2,,1),,70%2)2(A~F6),2006,3.6&,3.9&,3.3&2,,1.2,,,,,,,,(1),3,,,,4,A1,,5&,OA,1,OAOAB,,,OCDOEF234,,,,,,,,,,,,,COP5,0.5~1.01,21.5~2.02%38%暖通空调HV&AC2010年第40卷第8期5∃,,?6,A,5&;,,5&,A,,,,,6,1)7,3&,,,;,(1),71kPaABCDEF33.535.237.437.835.535.88511095951001002),,,,7,∃,3,3∃,,,;,,∋,,,,(15&,,,),,,,,:1);2),3%39%暖通空调HV&AC2010年第40卷第8期,2006:,1,,,,,223.1,,,2008520101(3)3kPaABCDEF85110959510010020085608075557065201015050504050503.2,,,15&,,22&,,,2008515,22&,,22&,,3.3,,,,,,,,:1);2);3),,,,3.4,0.5&,,11kWh8,,,8C,,,,,,COP,36kWh4,,,,,,(下转第56页)%40%暖通空调HV&AC2010年第40卷第8期,,,,,Q0G0,Q1Qr,11,,,,G1G010,,G2G0,,,,,,,116,,,,,;,,:,,,,;,,,:[1].[J].,2007,37(7):8385[2].()[J].,1996,26(4):2935[3].()[J].,2009,39(1):92101[4].∀#[J].,2008,24(4)[5].[D].:,2002[6].[D].:,2010[7].[D].:,2009[8]PotratzSJ.Designconsiderationsofacentralvariableflowchilledwaterplant[G]//ASHRAETrans,1997,103(1):759762(上接第40页),,,∀#∀#∀#,,;∀#,,∀#∀#,,,:,,:[1].[D].:,2002[2].[D].:,2009[3],.[J].,2006,36(1):132136%56%暖通空调HV&AC2010年第40卷第8期