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26,15020087,4ENERGYCONSERVATIONTECHNOLOGYVol26,SumNo150Jul2008,No4办公建筑空调系统能耗评价及节能潜力分析1,1,2,2,2(1北京联合大学机电学院,北京100101;2湖南大学土木工程学院,湖南长沙410082):本文根据长沙市一办公建筑空调系统的全年运行记录和实测数据,分析了空调系统的能耗特征并用温频数(BIN)法计算了空调年假想负荷及空调系统年能耗用空调能耗系数CEC评价了空调系统的运行情况在此基础上,从空调机组水系统的运行管理及室内空气参数的设定三个方面进一步对空调系统进行节能潜力分析结果标明,(1)在空调系统全年实际能耗量中,冷热水机组能耗高达54%,末端设备能耗为25%,水系统的能耗也高达21%(2)该宾馆CEC系数为20,比日本的办公楼CEC的判断基准15大30%以上这说明该办公楼空调系统能量利用效率较低,存在很大节能潜力(3)空调机组和水系统的科学运行管理及室内空气参数的合理设定对该空调系统节能具有重大意义:笔者通过比较当负荷率在80%下,开启一台主机和同时开启两主机的能耗情况发现,开启一台主机,系统的总EER提高近23%空调系统的总功率也可以减小259kW;而和该空调设定温度25!,相对湿度50%的情况相比,当空调设定温度提高到26!,相对湿度提高到60%,空调能耗可节省6%:办公建筑;空调系统;温频数(BIN)法;节能潜力:TK11+3:A:1002-6339(2008)04-0295-052008-05-142008-06-06:(2006-19)::(1962~),,,,EnergyConsumptionEvaluationandEnergy-savingPotentialAnalysisoftheHVACSystemforanOfficeBuildinginChinaZHANGEn-xiang1,LIChun-wang1,2,CHENShu-qin2,LINian-ping2(1ElectromechanicalCollege,BeijingUnionUniversity,Beijing100101,China;2CivilEngineeringCollege,HunanUniversity,Changsha410082,China)Abstract:AccordingtotheannualoperationrecordsoftheHVACsysteminatypicalofficebuildinginChangshacity,energyconsumptioncharacteristicsoftheHVACsystemareanalyzedinthispaperAnnualsupposedairconditioningloadsanditsannualenergyconsumptionarefurthercalculatedbyASHRAE∀sBIN(temperaturefrequency)method,andenergyconsumptionperformanceoftheHVACsystemisestimatedwiththecoefficientofenergyconsumptionforairconditioning(CEC)Basedonthesestudies,energy-savingpotentialoftheHVACsystemisanalyzedfromthethreeperspectivesofairconditioningunits,operationsandmanagementofthewatersystem,andsettingindoorairparametersTheconclusionsareasfollows:(1)IntheannualenergyconsumptionquantityoftheHVACsystem,theenergyconsumptionofheatandcoolresourcesamountisupto54%;terminalunitsoccupy25%andthewatersystemscontributeto21%(2)TheCECcoefficientofthisHVACsystemis20,larger#295#thanJapaneseCECbenchmarkof15,whichmeanstheenergyutilizationefficiencyofthisHVACsystemislow,andthereislargeenergy-savingpotential(3)TheenergyconsumptionofthisHVACsystemcanbereducedbyadoptingscientificoperationschedulesforheatingandcoolingresourcesandthewatersystemThecasestudyshowsthatthetotalEERandratepowerofthissystemisincreasedby23%and259kWrespectivelywhenoperatingonecoolresourceundertheloadrateof80%,comparedwithoperatingtwocoolresources;whenincreasingthedesigntemperatureandhumidityto26!and60%respectively,theenergyconsumptionamountoftheHAVCsystemisreducedby6%,comparedwiththedatawhenthedesigningtemperatureis25%andthehumidityis50%Keywords:officebuildings;HVACsystems;BINmethod;energy-savingpotential1,,30%~40%;200125%,2020,232%286%,,30%∃1%,,,10%~60%∃2%,,,,,BIN,22113,42m,8625m2,199818:0018:00(2),1221(),2~13,7300m2,25!,50%,18!,50%,,,,(),11549kW123kW2300kW80kW211kW211kW24kW229kW14532kW811kW211kW24kW229kW14532kW83,1121h,1080h2,,54%,21%441&&&(BIN)(CEC)CEC(CoefficientofEnergy#296#2Consumptionforairconditioning),CECCEC,∃3%411假想空调负荷的计算CEC,5,BIN∃4,5%,:(1)TT,BINT=2!∃6%(2)BIN,4(281420)BIN24h,(),BIN∃6%(3),;,∃3%:CL(HL)=c1T+c2h-c3(1)CL(HL)&&&,W/m2;T&&&,!;h&&&,kJ/kg;c1,c2,c3&&&(4)BIN,,,∃3%412空调系统全年总耗能量的计算∃3%IPLV,:E1=Q∋IPLV1(2)E1&&&,kW;Q&&&,kW;Q12;IPLV1&&&,kW/kW,BIN(),(h),E2E2=P(1-r)(3)E2&&&,kWh;P&&&,kW;&&&,h;r&&&,(,);(1-r),h42,BIN,,BIN8:00-18:00,7:00-17:00()8:00-18:00BIN,∃4,5%,::CLs=289T-5890(4):CLl=312d-3494(5):HL(s=276T-4367(6):HL(l=249d-1169(7)QC:QC=TpcTic(CLs+CLl)∋fT(8)#297#QH:QH=TphTih(CLs+CLl)∋fT(9)Tic&&&;Tih&&&;Tpc&&&;Tph&&&;fT&&&,h(4)0Tic=204!,(6)0Tih=158!BINT=2!,14~20!2BIN,32BINBIN,!2224262830323436,g/kg143152159161163165173176,h3513392832211711335715CLs,W/m24681046162422022780335839364514CLl,W/m29681248146715291592165419041997CL,W/m214362294309137314372501258406511Q,MJ/m218128031529726924012035(MJ/m2)1738(TJ)1273BINBIN,!2468101214,g/kg42465156657382,h2454159206193236207CLs,W/m2-3815-3263-2711-2159-1607-1055-503CLl,W/m2-123-024101225450649873CL,W/m2-3938-3287-2610-1934-1158-406370Q,MJ/m2-34-64-149-143-80-3428(MJ/m2)-478(TJ)-035,BIN:4826+1328=6154kWh/m2,:127TJ+035TJ=162TJ45,64BIN,!2224262830323436,h3513392832211711335715CL,W/m214362294309137314372501258406511Qt,kW1048316746225642723631915365874263247530/,kW123/54911111111,%191305411496581666777866%2533414856607581,kW307561561561592259225123123,kWh10793208481740413591157741226970111845,kWh995375BIN,!24681012,h2454159206193236CL,W/m2-3938-3287-2610-1934-1158-406Q,kW2875239919051412845296/,kW80/300111111,%95880063547128299IPLV110750505025,kW808060404020,kWh192043209540824077204720,kWh36460#298#6,kW,h,kWh112201242111122012421142201880429220163829325801856122911,:99537+36460=135997kWh,(),:135997+122911=258908kWh:326TJCEC:CEC==326162=20,CEC∃3%CEC1530%,,551,,,740%~90%,,40%,,,,26!,40%,,,,,:,,,,,,,80%,(8),50%30%,(EER),470;,,,,;,23%:1454-1185=259kW7(%)1009080706050403020101008776655648403325218211#2#1#%503080,kW594406935EER462405470483278,kW1029112,m3/h422280,kW111111,m3/h11298112,kW161528226221185,kW14441185EER30237152,1~2!,3!13,,,,,,,9,!,%,kWh1245010434022550995373265094674424601032775256098451626609362453,,,,,9,25!,50%23!,,9,26!,60%,6%(上接第320页)#299#(b)75%Pd(c)100%Pd75100%Pd,75%Pd,50%Pd,,,,,,
本文标题:办公建筑空调系统能耗评价及节能潜力分析
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