制冷与空调专业英语第2版 教学课件 ppt 作者 林慧珠 主编 1-4

UnitOneLesson1AirLesson2TheNeedofConditioningLesson3TheCleaningofAirLesson4ThermalStorage1-*制冷空调专业英语UnitOneLesson4ThermalStorage NewWords&Expressions: Text NotestotheText Exercise1-*制冷空调专业英语UnitOneLesson4NewWords&Expressionshydratethermaladj.热的,热量的temporaryadj.暂时的,临时的,临时性solaradj.太阳的,日光的availabilityn.可用性,有效性,实用性simultaneouslyadv.同时地backupn.后援,支持,阻塞；vt.做备份emergencyn.紧急情况,突然事件,非常时刻,紧急事件reservoirn.水库,蓄水池accomplishvt.完成,达到,实现n.氢氧化物;v.与水化合1-*制冷空调专业英语UnitOneLesson4NewWords&Expressions:分开(离),对...实行种族隔离densityn.稠密;浓厚withdrawvt.收回,撤消standbyn.可以信任的人,使船待命的信息备用vesseln.船,容器,器皿,脉管,导管phasen.阶段,状态,相,相位transportabilityn.可运输性,应处以流放componentn.元(部,组)件,成(部)分viscousadj.粘性的,粘滞的,胶粘的corrosiveadj.腐蚀的,蚀坏的,腐蚀性的Segregatevt.1-*制冷空调专业英语UnitOneTextThermalstorageisthetemporarystorageofhighorlow-temperatureenergyforlateruse.1Examplesofthermalstoragearethestorageofsolarenergyfornightheatingandthestorageofsummerheatforwinteruse,thestorageofwintericeforspacecoolinginthesummer,andthestorageofheatorcoolnessgeneratedelectricallyduringoff-peakhoursforuseduringsubsequentpeakhours.Mostthermalstorageapplicationsinvolvea24-hoursstoragecycle,althoughweeklyandseasonalcyclesarealsoused.热存储暂时存储高温或低温能量，以供以后使用。比如存储太阳能为晚上供热或存储夏天的热量供冬季使用，以及存储冬季的冰以供夏天的空间降温。再比如在用电低峰时期，可以存储电能产生的热量或冷量，以便在随后的高峰期间使用。大多数热存储以24小时作为存储周期，虽然也有以一周和一个季节作为周期的。Lesson41-*制冷空调专业英语UnitOneText:Whentheperiodofenergyavailabilityislongerthantheperiodofenergyuse,thermalstoragepermitstheinstallationofsmallerheatingorcoolingequipmentthanwouldotherwiseberequired.Inmanycases,storagecanprovidebenefitsforbothheatingandcooling,eithersimultaneouslyoratdifferenttimesoftheyear.Lesson4当能量获取的周期比能量使用的周期长时，热存储允许用比实际需要的加热或冷却设备更小。在许多情况下，存储既能在当时，也能在一年内其他的时期为加热和冷却提供好处。1-*制冷空调专业英语UnitOneText:Conditionsfavoringthermalstorageincludehighloadsofrelativelyshortduration;highelectricpowerdemandcharges;lowcostelectricalenergyduringoff-peakhours;needforcoolingbackupincaseofpoweroutageorarefrigerationplantfailure(onlychilledwaterpumpsmustbepoweredbytheemergencygenerator),needtoprovidecoolingforsmallafter-hourloadssuchascoolingofrestaurants,midheightelevatorequipmentrooms,individualoffices,andcomputerrooms;buildingexpansion(installationofstoragemayeliminatetheneedforheating/coolingplantexpansion);needtoprovideafirefightingreservoir;needtosupplementalimitedcapacitygenerationplant;andothers.2Lesson4有利于热存储应用的条件包括：相对短的时间内有较高的载荷;高电力的加载需求;在低峰期间的低成本电能;需蓄冷以防停电或制冷设备故障(仅仅是冷水泵需要以紧急发电机驱动)；需要为下班后的小负荷提供制冷，例如餐馆制冷；中等的电梯设备房间、个人办公室以及计算机房间;建筑物的扩大(存储设备的安装可以不需要扩大加热/冷却机器);提供消防水池的需要;需要补充一个小容量的发电机等。1-*制冷空调专业英语UnitOneText:Insensibleheatstorage,storageisaccomplishedbyraisingorloweringthetemperatureofthestoragemedium,i.e.,water,rockbeds,bricks,sand,orsoil.Lesson4对于显热存储，存储是以提高或降低存储介质，即水、岩床、砖、沙或土壤的温度来完成。1-*制冷空调专业英语UnitOneText:Inlatentheatstorage,storageisaccomplishedbyachangeinthephysicalstateofthestoragemedium,usuallyfromliquidtosolid(heatoffusion)orviceversa.Typicalmaterialsarewater/ice,salthydrates,andcertainpolymers.Energydensitiesforlatentheatstoragearegreaterthanthoseforsensibleheatstorage,whichresultsinsmallerandlighterstoragedevicesandlowerstoragelosses.Lesson4对于潜热存储，存储是以改变存储介质物理状态来完成的，通常从液体到固体(熔解热)或反过来。典型的物质有水/冰、含盐的水合物和某些聚合物。潜热存储的能密度比显热存储大，从而导致更小、更轻的储藏装置和更低的储藏损失。1-*制冷空调专业英语UnitOneText:Storageefficiencyistheratioofenergythatcanbewithdrawnfromstorage,dividedbytheamountputintostorage.Storageefficienciesupto90%canbeachievedinwell-stratifiedwatertanksthatarefullychargedanddischargedonadailycycle.Allstoragedevicesaresubjecttostandbylosses,whicharegenerallyproportionaltotheexposedsurfaceareaofthestoragevessel.3Lesson4存储效率是从存储中能够取出的能量与总的存入能量的比值。以一日为周期在完全分层的水箱中充满水再放掉，可达到90%的存储效率。所有的存储装置都面临备用损失，其损失程度与存储容器暴露在外的表面积成正比。1-*制冷空调专业英语UnitOneText:ForHVACandrefrigerationpurposes,waterandphasechangematerials(PCMs)-particularlyice-constitutetheprincipalstoragemedia.Soil,rock,andothersolidsarealsoused.Waterhastheadvantageofuniversalavailability,lowcost,andtransportabilitythroughothersystemcomponents.Somephasechangematerialsareviscousandcorrosiveandmustbesegregatedwithinthecontainerfortheheattransfermedium.Ifheatingandcoolingstorageisrequired,twophasechangematerialsmustbeprovided,unlessheatpumpingisused.Lesson4为了暖通空调和制冷，水和相变材料(脉码调制)—特别是冰—组成主要的存储介质。另外，土壤、岩石以及其他固体也被使用。水的优点是可以较易获取，费用低，通过别的系统部件就能输送。而一些相变材料是粘滞性和腐蚀性的，并且必须在容器内分离开来作为热传递介质。如果需要储热与储冷，那么除非使用热泵，否则必须提供两种相变材料。1-*制冷空调专业英语UnitOneNotestotheTextLesson41-*制冷空调专业英语UnitOneNotestotheText　　　1.Thermalstorageisthetemporarystorageofhighorlow-temperatureenergyforlateruse.Lesson4　　thermalstorage应译为“热储存，蓄热[以显热形式（温升）或潜热形式（相变）积聚在一物体或系统中的热量]”。1-*制冷空调专业英语UnitOneNotestotheText　　　2.Conditionsfavoringthermalstorageincludehighloadsofrelativelyshortduration;highelectricpowerdemandcharges;lowcostelectricalenergyduringoff-peakhours;needforcoolingbackupincaseofpoweroutageorarefrigerationplantfailure(onlychilledwaterpumpsmustbepoweredbytheemergencygenerator),needtoprovidecoolingforsmallafter-hourloadssuchascoolingofrestaurants,midheightelevatorequipmentrooms,individualoffices,andcomputerrooms;buildingexpansion(installationofstoragemayeliminatetheneedforheating/coolingplantexpansion);needtoprovideafirefightingreservoir;needtosupplementalimitedcapacitygenerationplant;andothers.Lesson4　这是一个长句。在科技英语中经常会遇到很长的句子，要认真 分析 定性数据统计分析pdf销售业绩分析模板建筑结构震害分析销售进度分析表京东商城竞争战略分析 其成分。本句是一个简单句，主语是Conditions，favoringthermalstorage是现在分词作定语修饰conditions；谓语是include，后面的是宾语部分，由若干并列成分构成。　　poweroutage译为“停电”　　after-hour译为“下班以后”1-*制冷空调专业英语UnitOneNotestotheText　　　3.Allstoragedevicesaresubjecttostandbylosses,whicharegenerallyproportionaltotheexposedsurfaceareaofthestoragevessel。Lesson4　　句中的which作关系代词，引出非限制性定语从句，指代losses。1-*制冷空调专业英语UnitOneExerciseLesson4 Decidewhetherthefollowingstatementsaretrue(T)orfalse(F)accordingtothetext.1-*制冷空调专业英语UnitOneExerciseLesson4　　1.Insulationmaterialsareemployedonlyforthepurposeofresistingflowofheat.(F)　　2.Thechoiceofinsulationmaterialsshouldbeenbasedoncostandonthephysicalcharacteristics(T)　　3.Insulationmaterialswithnumeroustrappedairspacesaremorewidelyused.(T)　　4.Inaverticalairspaceandhorizontalairspaceheattransferredisthesameforthesametemperaturedifference,regardlessofwhichsideiswarmorcold.(T)　　5.Airmotionduetotemperaturedifferencestransfergoesbythenameofconvection.(T)