建筑环境与能源应用工程专业英语9.ppt
- 文档编号:18792728
- 上传时间:2023-11-16
- 格式:PPT
- 页数:27
- 大小:1.73MB
建筑环境与能源应用工程专业英语9.ppt
《建筑环境与能源应用工程专业英语9.ppt》由会员分享,可在线阅读,更多相关《建筑环境与能源应用工程专业英语9.ppt(27页珍藏版)》请在冰点文库上搜索。
1,LessonThreeHeatPumps,2,Topics,Whatisheatpump?
(thedefinitionandworkingtheory),Classificationofheatpumpsystems,Typicalheatpumpsystemsflowsheetandtheircharacters,Worksitepictures,Textandkeywordslearning,3,heatpumpreversingvalveheatingcyclecoolingcycleindoorcoiloutdoorcoilfrostdefrostenergyefficiencyratio(EER)coefficientofperformance(COP)heatingseasonalperformancefactor(HSPF)seasonalenergyefficiencyratio(SEER)ambienttemperaturesair-sourceheatpumpwater-sourceheatpumpground-waterheatpumpgeothermalclosed-loopheatpump,heatpump热泵reversingvalve四通换向阀heatingcycle制热循环coolingcycle制冷循环indoorcoil室内盘管outdoorcoil室外盘管frost霜结霜defrost除霜energyefficiencyratio(EER)能效比coefficientofperformance(COP)性能系数heatingseasonalperformancefactor(HSPF)制热季节性能系数seasonalenergyefficiencyratio(SEER)(制冷)季节能效比ambienttemperatures室外气温air-sourceheatpump空气源热泵water-sourceheatpump水源热泵ground-waterheatpump地下水源热泵geothermalclosed-loopheatpump闭环地源(或土壤源)热泵,Frequentlyusedwordsandphrases,4,Whatisheatpump?
Aheatpumpextractsheatfromasourceandtransfersittoasinkatahighertemperature.Accordingtothisdefinition,allpiecesofrefrigerationequipment,includingairconditionersandchillerswithrefrigerationcycles,areheatpumps.Inengineering,however,thetermheatpumpisgenerallyreservedforequipmentthatheatsforbeneficialpurposes,ratherthanthatwhichremovesheatforcoolingonly.,Topicone:
Heatpump-Definition,5,Topicone:
Heatpump-workingtheory,6,Heatingseason,T1,T2,T3,T4,Topicone:
Heatpump-workingtheory,7,Coolingseason,Topicone:
Heatpump-workingtheory,T3,T4,T1,T2,8,AirsourceheatpumpWaterloopheatpumpGroundsourceheatpump,TopicTwo:
ClassificationofHeatpumpsystems,Therefore:
Openyoumind,comprehendbyanalogy,9,Airsourceheatpump,TopicThree:
Typicalheatpumpsystems-Airsourceheatpump,Coolwater,Air,10,Benefitsrecoversheatfromsomezonesanddeliveredtoothersprovidesasimplemethodofzonecontrolprovidesahighlevelofreliabilityforbothheatingandcoolingmodesreducespipingcoststransfersactualmaintenanceandrepaircoststobuildingtenants,Waterloopheatpump,TopicThree:
Typicalheatpumpsystems-Waterloopheatpump,T4,11,TerminologyThetermground-sourceheatpump(GSHP)isappliedtoavarietyofsystemsthatusetheground,groundwater,orsurfacewaterasaheatsourceandsink.Includedunderthegeneraltermareground-coupled(GCHP),groundwater(GWHP),andsurfacewater(SWHP)heatpumps.Manyparalleltermsexist(e.g.,geothermalheatpumps(GHP),earthenergysystemsandground-source(GS)systems)andareusedtomeetavarietyofmarketingorinstitutionalneeds.,TopicThree:
Typicalheatpumpsystems-Ground-sourceheatpump-Terminology,12,Ambientair,Earth,Grounderwater,TopicThree:
Typicalheatpumpsystems-Ground-sourceheatpump-Advantages,13,Groundsourceheatpump,Ground-CoupledHeatPump,DirectexpansionGCHP,GroundwaterHeatPump,SurfaceWaterHeatPump,Open-loopSWHP,Closed-loopSWHP,GCHPswithsecondarysolutionloops,Horizontal,Vertical,TopicThree:
Typicalheatpumpsystems-Ground-sourceheatpump-Classification,14,VerticalGCHP,TheadvantagesoftheverticalGCHPisit
(1)requiresrelativelysmallplotsofground,
(2)isincontactwithsoilthatvariesverylittleintemperatureandthermalproperties,(3)requiresthesmallestamountofpipeandpumpingenergy,and(4)canyieldthemostefficientGCHPsystemperformance.,Thedisadvantageisitistypicallyhigherincostbecauseofexpensiveequipmentneededtodrilltheboreholeandthelimitedavailabilityofcontractorstoperformsuchwork.,TopicThree:
Typicalheatpumpsystems-Ground-sourceheatpump-Groundcoupled(vertical),15,Disadvantagesinclude,inadditiontolargergroundarearequirement,greateradversevariationsinperformancebecause
(1)groundtemperaturesandthermalpropertiesfluctuatewithseason,rainfall,andburialdepth,
(2)slightlyhigherpumpingenergyrequirements,and(3)lowersystemefficiencies.,HorizontalGCHP,TheadvantagesofhorizontalGCHPsarethat
(1)theyaretypicallylessexpensivethanverticalGCHPsbecauserelativelylowcostinstallationequipmentiswidelyavailable,
(2)manyresidentialapplicationshaveadequategroundarea,and(3)trainedequipmentoperatorsaremorewidelyavailable.,TopicThree:
Typicalheatpumpsystems-Ground-sourceheatpump-Groundcoupled(Horizontal),16,Advantages:
减少中间换热环节,提高效率管材耗量可以减少地下施工量相对减少,不需要防冻剂Disadvantages:
地下换热器成本较高,但同时减少了二次换热管路制冷剂易泄漏,DirectexpansionGCHP,TopicThree:
Typicalheatpumpsystems-Ground-sourceHP-Groundcoupled(Directexpansion),17,GroundwaterHeatPumps,Disadvantagesarethat
(1)localenvironmentalregulationsmayberestrictive,
(2)wateravailabilitymaybelimited,(3)foulingprecautionsmaybenecessaryifthewellsarenotproperlydevelopedorwaterqualityispoor,and(4)pumpingenergymaybehighifthesystemispoorlydesignedordrawsfromadeepaquifer.,TopicThree:
Typicalheatpumpsystems-Ground-sourceheatpump-Groundwaterheatpump,TheadvantagesofGWHPsundersuitableconditionsare
(1)theycostlessthanGCHPequipment,
(2)thespacerequiredforthewaterwellisverycompact,(3)waterwellcontractorsarewidelyavailable,and(4)thetechnologyhasbeenusedfordecadesinsomelargestcommercialsystems.,18,SurfaceWaterHeatPump,TheadvantagesofSWHPsare
(1)relativelylowcost(comparedtoGCHPs)duetoreducedexcavationcosts,
(2)lowpumpingenergyrequirements,(3)lowmaintenancerequirements,and(4)lowoperatingcost.,Disadvantagesare
(1)thepossibilityofcoildamageinpubliclakesand
(2)widevariationinwatertemperaturewithoutdoorconditionsiflakesaresmalland/orshallow.Suchvariationinwatertemperaturewouldcauseundesirablevariationsinefficiencyandcapacity,thoughnotassevereaswithairsourceheatpumps.,TopicThree:
Typicalheatpumpsystems-Surface-waterheatpump,19,TopicThree:
Typicalheatpumpsystems-Surfacewaterheatpump(openloop),TopicThree:
Typicalheatpumpsystems-Surfacewaterheatpump(closedloop),20,Heatbalance,KeyproblemHeatbalance,21,1.ABriefHistoryhistoryofheatpump2.TheEfficiencyofaHeatPumpEERCOP3.TypesofHeatPumpsAir-sourceHeatPumpsWater-sourceHeatPumpsGround-waterHeatpumpsClosed-loopHeatPumps,TopicFive:
Textlearningandkeywords,22,ThebasicprincipleofheatpumpoperationwasfirstproposedbyNicholasCarnotin1824andthenfurtheredbyLordKelvinin1852.2.Ratherthanutilizingwaterastheheatsource,mostmanufacturesputtheirenergiesintoair-sourceheatpumps,becausemanydesignerswereunderthemistakenimpressionthatgroundwaterresourceswerelimited.,propose:
提出提议further:
促进(发展)拓展,puttheirenergiesinto:
把精力投入到中去beunderthemistakenimpression:
误解,TopicFive:
Textlearningandkeywords,23,3.Oneair-sourceheatpumpmanufacturedduringthisperiodreversedairflowoverthecoilsratherthanreversingtheflowoftherefrigerant.,reverse:
颠倒(流向)reversingvalve:
换向阀,TopicFive:
Textlearningandkeywords,4.Inotherwords,whencalleduponforcooling,theindoorairwasdirectedovertheindoorcoil;whencalleduponforheating,theindoorairwasdirectedovertheoutdoorcoil.,callupon(on):
要求号召direct:
引导指导directalettertoaplaceCanyoudirectmetotherailwaystation?
indoorcoil:
室内盘管outdoorcoil:
室外盘管,24,5.Atthesametime,airconditioningequipmentwasgaininginpopularityandefficiency;6.Inanefforttoequalizepowerloads,powercompaniesbegananactivepromotionalcampaigninsupportofheatpumps,inspiteofthefactthattheequipmentwasstillnotperfected.,equalize:
补偿、平衡powerloads:
电力负荷active:
积极的promotionalcampaign:
推广活动促销活动,gain:
增加获利,TopicFive:
Textlearningandkeywords,25,7.TheAraboilembargooftheearly1970sfinallybroughthomethemessagetotheAmericanpeoplethatalternativeenergysourceswarrantedseriousconsideration.8.Althoughresearchcontinuestodayinanefforttofurtherimproveefficiency,thegeneralconsensusisthattheheatpumpsbeingmanufacturedfortodaysmarketareasignificantachievement.,Araboilembargo:
阿拉伯石油禁运weaponembargotowardsChinaalternativeenergysources:
替代能源warrant:
保证确保,further:
进一步地consensus:
多数人的意见舆论,TopicFive:
Textlearningandkeywords,26,9.Theequipmentiscosteffective,reliable,andaviablealternativetoconventionalheatingandcoolingmethods.,costeffective:
从成本考虑非常划算costeffectiveness:
成本效益viable:
可行的conventional:
传统的traditional,10.PriortotheAraboilembargo,fueloilwasabout35centsagallonandelectricitywasabout2centsakilowatthour.Today,thesamegallonoffueloiliscostingupwardsofadollar,andthesamekilowatthourofelectricityiscostingupwardsof6cents.,upward(s)of:
以上多于gallon:
加仑美制3.785升英制4.546升,TopicFive:
Textlearningandkeywords,27,11.Thosepersonsconsideringthebuildingorpurchaseofanewhomearealsofacedwiththecostofinstallingaheatingandcoolingsystem,andmusttakeintoconsiderationnotonlytheinstallationcostsbuttheoperatingcostsofsuchasystemoveritsusefullife.12.Ithasbeenproventobemorecosteffectiveinthemajorityofinstallations,evenwheninstallationcostsareconsidered.,installationcosts:
安装费用operatingcosts:
运行费用,majority:
多数minority:
少数,TopicFive:
Textlearningandkeywords,
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- 建筑 环境 能源 应用 工程 专业 英语
![提示](https://static.bingdoc.com/images/bang_tan.gif)