百威酒店建筑给水排水工程设计外文翻译.doc

百威酒店建筑给水排水工程设计外文翻译.doc

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CHANGCHUNINSTITUTEOFTECHNOLOGY

Energyefficiencyperformanceofmulti-energydistrictheatingandhotwatersupplysystem

资料来源：

SchoolofEnvironmentalScienceandEngineering,TianjinUniversity,Tianjin300072,China©CentralSouthUniversityPressandSpringer-VerlagBerlinHeidelberg2012

设计题目：

__百威酒店建筑给水排水工程设计

学生姓名：

_陆佳伟

学院名称：

___水利与环境工程学院

专业名称：

给水排水工程

班级名称：

给水1141

学号：

1106441104

指导教师：

蒋维卿

教师职称：

副教授

外文文献：

Energyefficiencyperformanceofmulti-energydistrictheatingandhotwatersupplysystem

SchoolofEnvironmentalScienceandEngineering,TianjinUniversity,Tianjin300072,China©CentralSouthUniversityPressandSpringer-VerlagBerlinHeidelberg2012

J.Cent.SouthUniv.（2012）19:

1377−1382

DOI:

10.1007/s11771-012-1153-8

Energyefficiencyperformanceofmulti-energydistrictheatingand

hotwatersupplysystem

JINNan（金楠）,ZHAOJing（赵靖）,ZHUNeng（朱能）

SchoolofEnvironmentalScienceandEngineering,TianjinUniversity,Tianjin300072,China

©CentralSouthUniversityPressandSpringer-VerlagBerlinHeidelberg2012

Abstract:

Adistrictheatingandhotwatersupplysystemispresentedwhichsyntheticallyutilizesgeothermalenergy,solarthermalenergyandnaturalgasthermalenergy.Themulti-energyutilizationsystemhasbeensetatthenewcampusofTianjinPolytechnicUniversity（TPU）.Acoupleofdeepgeothermalwellswhichare2300mindepthweredug.Deepgeothermalenergycascadeutilizationisachievedbytwostagesofplateheatexchangers（PHE）andtwostagesofwatersourceheatpumps（WSHP）.Shallowgeothermalenergyisusedinassistantheatingbytwogroundcoupledheatpumps（GCHPs）with580verticalgroundwellswhichare120mindepth.Solarthermalenergycollectedbyvacuumtubearrays（VTAs）andgeothermalenergyarecomplementarilyutilizedtomakedomestichotwater.SuperfluoussolarenergycanbestoredinshallowsoilfortheGCHPutilization.Thesystemcanusefossilfuelthermalenergybytwonaturalgasboilers（NGB）toassistinheatingandmakinghotwater.Theheatingenergyefficiencywasmeasuredinthewinterof2010−2011.Thecoefficientsofperformance（COP）underdifferentheatingconditionsarediscussed.Theperformanceofhotwaterproductionistestedinalocaltypicalwinterdayandthesolarthermalenergyutilizationfactorispresented.TherusultsshowthattheaveragesystemCOPis5.75or4.96underdifferentworkingconditions,andthetypicalsolarenergyutilizationfactoris0.324.Keywords:

geothermalenergy;solarthermalenergy;districtheating;hotwatersupply

1Introduction

Buildingenergyconsumptiontakesabout23%inthetotalenergyconsumptioninChinaatpresentanditisingrowthtrend[1].Heatingloads,coolingloadsandhotwaterloadsarethemainitemsofbuildingenergyconsumption.RenewableenergyhasbeenwidelyusedinChinaforrecentyears.Geothermalenergyandsolarthermalenergyaremostcommonlyusedinbuildings.Independentutilizationofsinglerenewableenergyispopular,butintegratedutilizationofseveralkindsofrenewableenergyisrelativelyscarce.Adistrictheatingandhotwatersupplysystemwas

designedforthenewcampusofTianjinPolytechnicUniversity,China.Inthissystem,geothermalplateheatexchanger（PHE）,watersourceheatpump（WSHP）,groundcoupledheatpump（GCHP）andnaturalgasboiler（NGB）areusedsyntheticallytoheatthecampusbuildings;

geothermalPHE,vacuumtubearray（VTA）andNGBareusedcomplementarilytomakedomestichotwater.TherearesomecasestudiesongeothermaldistrictheatinginTurkeyinresentyears[2−7].Someresearchesfocusedonenergyanalysisofgeothermalheatingsystems[8−15].Intheseresearches,deepgeothermalenergyistheonlysourceofheating.Thissystemusesmulti-energyinheating,includingdeepgeothermalenergy,shallowgeothermalenergyandnaturalgasthermalenergy.Thesystemusessolarthermalenergy,deepgeothermalenergyandnaturalgasthermalenergytomakedwellshotwater.Thoughtherewaspreviousresearchonsolarenergyusedinheatingandcooling[16],solarhotwateruseddirectlyasdwellshotwaterisadirectandhighlyefficientwaytoutilizesolarthermalenergy.Thecoefficientsofperformance（COPs）underdifferentheatingconditionsarediscussedaccordingtheactualmeasurementdatainthewinterof2010−2011.Theperformanceofsolarhotwaterproductioninalocaltypicalsunshinewinterdayispresented.Thedesignideaofthissystemcanbereferredinothermulti-energybuildingsystemdesigns.

2Systemsandoperationstrategy

Thegeothermal,solarthermalandnaturalgasthermalenergycouplingutilizationsystemfordistrictheatingandcentralhotwatersupplyofTPU’snewcampusconsistsoftwoparts:

multi-energydistrictheatingsystem（MEDH）（Fig.1）andmulti-energycentralhotwatersupplysystem（MECHWS）（Fig.2）.Foundationitem:

Project（2010DFA72740-06）supportedbyInternationalScience&TechnologyCooperationProgramofChinaReceiveddate:

2011−07−26;Accepteddate:

2011−11−14Correspondingauthor:

ZHAOJing,PhD;Tel:

+86−22−27409188;E-mail:

zhaojing@

2.1MEDH

TheMEDHutilizesbothgeothermalenergyofdeeplayerandshallowlayer.Naturalgasthermalenergyisusedasanauxiliaryandassistantheatingsource.AcoupleofgeothermalwellsthatreachtheOrdovicianindepthof2300mweredug.Eachwellwassetinawellhouseandequippedwithwellmouthequipments.Groundwaterisdrawnupbyavariablefrequencysubmersiblepump（VFSP）.Then,thegroundwaterispumpedtowellwaterheatexchangers（WWHE）andthehotwaterheatexchangers（HWHE）oftheMECHWSs.Thecontrolvalve（CV）inFig.1isonlyopenedwhentheMECHWSneedsgeothermalwater.TheWWHEsaredividedintotwostages.ThegroundwaterispumpedthroughthehotsideofthefirststageoftheWWHE（WWHE-I）.ThecoldsideoftheWWHE-IisconnectedtothewaterfeederandcollectoroftheMEDHs.ThecircularflowpumpedbythepumpP1throughthecoldsideoftheWWHE-Iisapartoftheheatingflow.ThegroundwaterisdividedintotwoflowsafteritcomesoutthehotsideoftheWWHE-Ibyanelectriccontrolvalve（ECV）.OnepartissenttothehotsideofthesecondstageoftheWWHE（WWHE-II）andtheflowrateissetaccordingtotheoutletwatertemperatureofthecoldsideofWWHE-II.TheoutletwateroftheWWHE-IIispumpedtotheevaporatorsoftheWSHP.Whenthetemperatureexceeds24°C,theECVwilldecreasethegroundwaterflowratetotheWWHE-IIuntilthetemperatureisbelow24°C.Whenthetemperatureisbelow20°C,theECVwilldotheoppositeoperation.ThisisbecauseexorbitantevaporatorwatertemperaturewouldcausethecompressorlubricatingoiltobecarbonizedandthelowevaporatorwatertemperaturewouldleadtoaninferiorCOPoftheWSHP.Thegroundwaterflowsarecombinedandsenttotheinvertedwellaftercascadeutilization,asshowninFig.1.Thegroundwatercanbeinvertedto100%duetothelocalgeologicalstructureandthereisnoneedforpressureinvertedpumps.TheWSHPsaredividedintotwostagestoo,WSHP-IandWSHP-II.ThecoldsidecircularflowoftheWWHE-IIpumpedbyP2isjusttheheatsourceoftheWSHP.ThecircularflowissentintotheevaporatorofWSHP-IandthentheevaporatoroftheWSHP-IIgivesoffheatinsequence.ThecondensersoftheWSHPareparalleledandconnectedtothewaterfeederandcollectoroftheMEDHs.ThecircularflowthroughthecondenserspumpedbythepumpP3isanotherpartoftheheatingflow.TheWSHParealsousedasfreezersinsummerwiththecoldsourceofcoolingtowers.TwoGCHPsareparalleledtoheatandcoolthebuildingstoo.580verticaldoubleU-tubegroundheatexchangers（VDUGHE）areusedtoabsorbandreleaseheat.TheholesofU-tubesare120mindepth.TheGCHPsareconnectedtothewaterfeederandwatercollectoroftheMEDHstosupplyheatingandcoolingflows.TwoparallelNGBsareusedtoassistinheatingwhenthegeothermalenergycannotfulfillthepeakheatloadorthegeothermalenergyequipmentsarebroken.

2.2MECHWSs

TheMECHWSsutilizesolarthermalenergy,geothermalenergyandnaturalgasthermalenergyinacomplementaryway.TwoparallelVTAsareusedtocollectsolarthermalenergy.EachoftheVTAsconsistsof120collectors.Eachcollectorhas50vacuumtubesinparallelconnection.Every5collectorsaresetinseriesand24suchseriesareparalleledeachothertoconstituteanarray.ThetotalabsorberareaoftwoVTAsis1500m2.Thesolarhotwaterisusedashotwaterofdwellsdirectly.ThewateriscirculatedbythepumpP4betweentheVTAandasolarhotwatertank（SHWT）whichis20tincapacity.ThewatertemperaturesinthemiddleheightofthetankandtheoutletoftheVTAaretestedbyplatinumresistancethermometers.Thetemperaturesignalsaresenttoanelectriccontrolcasing（ECC-1）whichcontrolsthewatercirculationbetweentheVTAandtheSHWT.ThewaterintheSHWTcanbepumpedbythepumpP5toacentralhotwatertank（CHWT）whichis200tincapacityandthewaterintheCHWTcanbepumpedtotheSHWTbythepumpP6.ThewatertemperatureintheCHWTistestedbyaplatinumresistancethermometer.ThistemperaturesignalandtheSHWTwatertemperaturesignalaresenttothesecondelectriccontrolcasing（ECC-2）.ThewatercirculationbetweentheSHWTandtheCHWTiscontrolledbytheECC-2.Ifthecollectedsolarthermalenergycannotmeettheenergyrequirementtomakeenoughhotwaterofdwells,geothermalenergywillbeusedtoheatwaterthroughtheHWEC