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Air-water Coolers Installation Operation Maintenance ManualCONTENTS1 General2 Installation and removal of cooler3 Commissioning4 Protective film5 Standstill6 Service control6.1 General6.2 Performance test7 Cleaning7.1 General7.2 Cleaning of the water side7.2.1 Mechanical cleaning7.2.2 Hydraulic cleaning7.2.3 Chemical cleaning7.2.3.1 Chemical cleaning -Insitu7.2.3.2 Chemical cleaning-Cooler removed7.3 Cleaning of the air-side7.3.1 General7.3.2 Hydraulic cleaning7.3.3 Chemical cleaning1. GeneralThe water cooler is a finned tube heat exchanger .The hot air flows through the fins on the outside of the tubes and the cooling fluid flows through the tubes. The heat exchanger surface of the cooler consists of elliptical core tubes with rectangular threaded on fins or round core tubes with either wound-on fins or continuous flat plate fins. The bond between fin and tube is achieved either by mechanical means or by soldering.The core tubes are rolled into the tube sheets at each end of the tubes with roller.Side wall form an integral part of the cooler and are bolted to tube sheets.Water Headers (Namely connection and Return headers) are provided for water handling. The number of separation baffles conforms to the number of water passes. The headers are bolted to the tube sheets, gaskets interposed to form a seal. Plugs in the header are provided for cooler venting and draining.The materials for headers, tube, sheets and core tubes are chosen in accordance with the specification of the cooling water to be used and the recommended water velocity in the tubes.2.Installation and removal of the coolerRead all the maintenance instructions before you begin bundling this product.The cooler should be installed where it is accessible for cleaning, but not where the general public has access to it. Only let trained personnel with profound knowledge of the product and the appropriate safety rules carry out any work on the cooler.Prior to installation of the cooler ,the transport covers of the air side and the blanks on the water connection flanges are to be removed .The air and water side sealing surfaces ,which areprotected priot to shipping, must be cleaned by the use of turpentine.The cooler can either be mounted to the engine as a self mounted in the air duct as a cantilever unit. The air side connections are bolted to the air ducts using gaskets or sealing compound provided by the engine builder.The cooling water pipes are bolted to connection flanges on the connection header using gaskets also provided by the engine builder.To avoid deformation and stresses when installing the cooler all connecting surfaces must be parallel and the tolerances should be kept as small as possible.All connections are to be air and water tight. Transport lugs are provided on the side walls forlifting and handling of the complete cooler. Lifting lugs are also welded to the tube stack side walls. Prior to installation of the cooler casing into the air duct the tube stack can be removed by means of unscrewing the bolts holding the protruding tube sheet to the casing frame and removal of the gland packing or cover plate at the extension end tube sheet. At the fixed end of tube stack threads are provided in the water header for eyebolts to be used when lifting and pulling out.3. CommissioningThe cooler is subject to a hydraulic pressure test in our factory. It is however recommended to carry out a test with the specified test pressure before installation.If after prolonged storage or extended standstill the geared gaskets are leaking, tightening of the geared bolts might prevent further leakage. If this is not sufficient the header gaskets must be replaced. A pressure test with specified test pressure should be carried out after replacement.When refitting the headers ,tighten the bolts in the order .Tightening torque :70NmAfter assembly of the cooler is completed the cooler is circulated with the specified cooling water quantity prior to venting.For cooler venting, the vent plugs in the headers are removed. After the air has escaped from the cooler the plugs are fitted again. Venting should be repeated shortly after cooler is taken into operation. Venting of the complete cooling system is better than venting only thecooler and should therefore be preferred.With multi-circuit or multi-stage coolers, each circuit or stage should be vented separately.After a leak test has been carried out on all plant components, and the water flow has been checked to en-sure there are no restrictions, the cooler can be put into operation.Upon accelerating the engine to the nominal load the air temperature should be measured before and after the cooler and the cooling water flows set in accordance with the nominal water flows stated in the performance data sheet for the cooler in question.Never operate at min. velocity for a prolonged period of time. The nominal water flow stated in the performance data sheet for the cooler in question should be maintained.Frequent fluctuation of the water velocity impede the formation of a protective film on the tube inside, which are vital for corrosion protection. A too low water velocity encourages dirt deposits and a too high velocity causes erosion. To throttle the water flow or improper position of the water intake could lead to oxygen enriched water which favors corrosion. To keep the water flow, and so the watervelocity, constant also during part load operation ,control devices should be installed.4. Protection filmMeasures to assure the formation of a strong and durable protective film.The inherent good chemical corrosion-resistance of cop-per and copper alloys is due to their ability to form a natural protective film which is difficult to dissolve.New cooler tubes lacking a sufficiently strong protective film should never be operated with contaminated water, as deposits on the material surface would prevent the formation of such a protective film.For the above reason clean fresh water is used for the hydraulic test of the heat exchanger. The utilization of contaminated water should also be avoided during test runs. During test runs it is recommended to add small quantity of easily soluble ferrous sulphate (FeSO4.7H2O) to the cooling water to make sure that a good protective film is formed before operating with contaminated water.It is sufficient to add about 5mg/l to cooling water during a period of one hour every 24 hours. Adding of ferrous sulphate should, if possible, be repeated during normal operation until the first inspection is carried out.An appropriate valve for adding ferrous sulphate should be provided in the piping close to the water inlet nozzle of the cooler.5. StandstillA standstill of the cooling water system, leaving the cooler undrained, is hazardous for cooler parts made of copper , copper alloys, steel and cast iron.For copper and copper alloys standstills are especially hazardous prior to the formation of a protective film or in the case that the destruction of the same must be feared for reason of deposit attacked by putrefaction products such as ammonium compounds and hydrogen sulphide.If possible, cooler operation should not be interrupted during the first 2 months after commissioning if the cooler can not be drained.However, if there is a failure in cooling water supply and operation is resumed within 3 days and then for a prolonged period of time kept uninterrupted, the cooler may be left undrained.It must be then guaranteed that the tubes are free from deposits. If deposits have formed, the cooler should be drained, the tubes cleaned and flushed with clean water prior to being dried. We recommend the use of warm or pre-dried air for blowing through the tubes.The coolers need to be vented adequately. If sea water, brackish or saline water(chloride content>500mg/l) is used as cooling water, water with low salinity (drinking water quality)should be used for flushing. In case of standstill within the start-up period of 2 months which is expected to last for more than 3 days, and where deposits must be feared, the cooler should be drained, flushed and dried.To avoid standstill corrosion after the first 2 months of operation the above described cleaning procedure should be repeated by every standstill lasting longer than 2 weeks.In case of permanent service interruptions after the start-up period it may be necessary to limit the standstill where the cooler is kept undrained to 3 days and operate the unit under conditions as recommended for the start-up period.During short standstill the cooler can be operated at low cooling water velocity soformation of deposits in the tubes can be prevented. Operating with low water velocities is to be preferred to cooling water standstill in the tubes as putrefaction products, such as ammonium compounds and hydrogen sulphide are washed away from their point of origin.During winter time standstill if frost injury to the cooler could occur the cooler should be drained also during the shortest standstill.6.Service control6.1 GeneralFor service control, thermometers are to be installed in the air ducts and in the cooling water piping before and after the cooler, we recommend to keep record of the air and water temperatures in the machine log book periodically. Further control instruments can be provided in accordance with the individual requirement.In case of the occurrence of a major amount of condensate after the cooler, further condensation can be prevented ,or at least limited, by the use of a bypass control of the cooling water as previous described.A possibility to drain the condensate must be assured.6.2 Performance testThe performance guarantee given is main expressed by the temperature difference between cold water and cold air during normal operation and should be checkedfrom time to time.In the event that a considerable increase of the guaranteed temperature difference observed during normal operation ,this might be due to accumulation of air in the cooler. To remedy the above the cooler should be vented by using the procedure previously described.In case a performance increase cannot be achieved by proceeding as above and provided no other disturbance can be found , the cooler needs cleaning.A differential pressure gauge can also be used to check whether or not cleaning of the air or water side of the cooler is necessary. We recommend to install differential pressure gauges in the air duct and water piping before and after the cooler.7. Cleaning7.1 GeneralCleaning of the water and air side heat exchange surfaces is imperative for a long and trouble free operation of the cooler. The cleaning intervals vary with the mode of operation, cooling water quality, intake air characteristics etc.Cleaning can be done by either mechanical , hydraulical or chemical means.7.2 Cleaning of the water sideRegular cleaning is necessary. The cleaning intervals depend on the cooling water used. Cleaning of the water side is not only required to maintain the thermal performance of the cooler. Scaling increases the risk of biting corrosion and obstacles partly blocking the tubes favors erosion.7.2.1 Mechanical cleaningMechanical cleaning is done by use of nylon brushes fitted to a rod. The length of the rod corresponds to the tube length of the cooler in question and the type of brush is chosen in accordance with the finned tube type. The brush with rod is part of each cooler delivery.Mechanical cleaning can be done insitu or with the cooler removed. At least one header needs to be removed when cleaning. For header removal threaded holes with the same dimension as the header bolts are provided in the header flange to serve as jacking screws. The wet tubes should be thoroughly brushed clean one after the other and the dirt flushed out until no residues are left. After the cleaning is completed the headers are refitted using new gaskets. Venting must be repeated after cooling water is refilled7.2.2 Hydraulic cleaningHydraulic cleaning is carried out with the cooler removed using a high pressure spray gun with special nozzle to remove dirt deposits inside the tubes.7.2.3 Chemical cleaningChemical cleaning can be carried out in-situ or with the cooler removed.7.2.3.1 Chemical cleaning In-situTo ensure that the cooler is always operated without fouling or scaling in the tubes we recommend an integrated and continuously operating chemical cleaning system to be fitted.Such cleaning system comprises of a circuiting pump and a detergent tank with the necessary piping and shut off valves. The detergent circuit is connected to the cooling water inlet and outlet piping between their shut off valves and the water header flanges.Prior to cleaning, the cooling water flow is interrupted to allow the cooler to drain via the cooling water outlet piping. For draining the vent screw are removed. After draining, the cooling water valves are closed. The valves of the cleaning circuit are opened and the circulating pump switched on. The vent screws are fitted after venting completed.It is recommended to connect the cleaning circuit to the cooling water outlet piping in such a way that the deter-gent flow is opposite to the normal cooling water flow.When cleaning completed the cooler is drained leaving no detergent in the cooler. The valves of the cleaning circuit are closed and the cooling water valves opened. Flushing is done with normal cooling water. Reventing of the cooler is necessary.Scaling deposits in the cooling tubes can be removed by chemical cleaning as well. For removal, a 10% HCL hydrochloric, or muriatic acid is used and a 0.5% inhibitor (specifically suitable for the individual tube material added.After cleaning, the cooler is to be flushed thoroughly, i.e. no detergent residues are allowed to be left in the cooler.This is most important in case the cooler is shut down for a short time after cleaning.If the cooler is chemically cleaned in mounted position the headers need not be dismounted. For chemical cleaning we recommend to use suitable detergents to clean:The instructions and handling guidelines provided by the manufacturer of the detergent in question should always be observed when using the chemical.7.2.3.2 Chemical cleaning Cooler removedChemical cleaning while the cooler is removed is required if neither mechanical or hydraulic cleaning proved successful and if the cooler is not connected to a continuously operating cleaning system.The complete cooler with attached header will be connected by the use of blind flanges to an external cleaning circuit or filled with detergent on the water side. Time of saturation depends on the grade of deposit. If the result is not satisfying, cleaning should be repeated.7.3 Cleaning of the air-side7.3.1 GeneralCleaning of the air-side should be done early enough to avoid accumulations of soot and oil on the fins, which after a period of time form a hard crust that is difficult to remove, as well as the deposition of other crack products as for instance residues that form a sulphuric acid (compound with condensate) when left on the fins and tubes for some time.7.3.2 Hydraulic cleaningHydraulic cleaning is effected when the cooler is removed .A high pressure spray gun as described above is suitable also for this requirement. We recommend a nozzle size of 3mm. If the water jet attacks the cooling tubes vertically, i.e. in parallel to the fins, a pressure of 120bar is suitable to be applied at a distance of 2m from the fin surface.7.3.3 Chemical cleaningWe recommend chemical cleaning of the air side while the cooler is removed.The water headers are detached from the cooler bundle .The tube bundle is then immersed into a chemical cleaning bath. The time of immersion is a function of the degree of fouling. When cleaning completed, the cooler is to be flushed by applying a powerful water jet. If the result isstill not satisfying, cleaning should be repeated.To intensify the cleaning effect of the bath and shorten the cleaning time, it is recommended to circulate the detergent. The chemical detergents can also be applied by spraying. The following detergents are recommended for air side cleaning.The instructions and handling guidelines provided by the manufacturer of the detergent in question should always be observed when using the chemical.。
空气调节器维修手册一、前言空气调节器（Air Conditioner）是一种常见的家用电器，用于调节室内空气温度和湿度，提供舒适的环境。
然而，由于长期使用或其他原因，空调可能会出现一些故障，需要及时维修。
本手册旨在为用户提供维修空调的详细指导，帮助您解决常见的问题。
二、安全须知在进行空调维修之前，请务必注意以下安全事项：1. 首先，确保断开电源并拔下电源插头。
2. 在进行任何维修工作之前，戴上绝缘手套和护目镜，确保个人安全。
3. 不要在未经许可的情况下打开空调主机或触摸内部零件，以免引发电击或其他危险。
三、故障排除1. 无法启动- 检查电源是否插好。
确认插头连接完好。
- 检查电源线是否断裂或损坏。
如有破损，请及时更换。
- 检查电源开关是否处于关闭状态。
尝试打开电源开关。
- 如仍无法启动，可能是供电问题，请联系专业维修人员进行检查修复。
2. 空调运行不正常- 检查空调显示屏是否正常。
若有故障码显示，请按照说明书的故障码表进行排查。
- 检查空调滤网是否堵塞。
定期清洗或更换滤网。
- 检查空调外部散热器是否受到阻碍。
确保周围无物体遮挡，保持良好的散热。
- 如问题仍未解决，请联系售后服务中心或专业维修人员。
3. 制冷效果差- 检查空调是否正常供电。
确保电压和电流符合要求。
- 检查空调温度设置是否合适。
调整温度设置为所需的舒适温度。
- 检查空调滤网是否清洁。
如果滤网堵塞，清洗或更换它。
- 检查空调室内和室外机组的换热器是否清洁。
如果有污垢，清洗它们。
- 如问题仍未解决，请联系专业维修人员进行检查修理。
4. 异常噪音- 检查空调固定螺丝是否松动。
如有松动，请紧固它们。
- 检查空调安装是否牢固。
如果有松动，请进行安装调整和固定。
- 检查空调室内和室外机组是否平稳。
如果不平稳，可以调整基座或垫片，以稳固机组。
- 如问题仍未解决，请联系专业维修人员进行检查修理。
四、维护保养定期维护保养空调可以延长其使用寿命和维持良好的性能。
空冷器操作维护检修规程一、空冷器的操作（一）、空冷器管束操作时应注意的事项：1、管内介质、温度、压力均应符合设计条件,严禁超压,超温操作；2、管内升压、升温时,应缓慢逐级递升,以免因冲击驟热而损坏设备；3、空冷器正常操作时,应先开启风机,再向管束内通入介质.停止操作时,应先停止向管束内通入介质,后停风机；4、易凝介质于冬季操作时,其程序与3条相反；5、负压操作的空冷器开机时,应先开启抽气器,管内达到规定的真空度时再启动风机,然后通入管内介质,停机时,按相反程序操作.冬季操作时,开启抽气器达到规定真空度后,先通入管内介质,再启动风机,以免管内冻结无法运行；6、停车时,应用低压蒸汽吹扫并排净凝液,以免冻结和腐蚀；7、开车前应将浮动管箱两端的紧定螺钉卸掉,保证浮动管箱在运行过程中可自由移动,以补偿翅片管热胀冷缩的变形量。
（二）、空气冷却器风机操作应注意的事项：1、风机叶片角度应按照设计提供的数据安装盲目增大叶片安装角，会使电机超负荷运行2、运行过程中应密切注意电机电流情况，尤其是用风量较大时。
二、空冷器的维护保养（一）、空冷器空冷风机系统的维护保养及使用注意事项1、日常巡检●运行中有无异常性声音和振动.●回转部件有无过热、松动.2、定期维护保养●每三个月通过注油嘴加注锂基润滑油.●定期调整三角带的松紧度,并检查三角带胶带的磨损程度,磨损严重的应及时予以更换.●全面检查各零、部件的紧固状态一年一次.●风筒与叶轮的径向间隙检查一年一次.●叶片角度及叶片沿风机轴向跳动应每年检查、调整一次.●清除风机叶片表面油污,检查叶片损坏,半年一次.3、检修注意事项●风机使用角度不得超过规定的调角范围以防电机过载.●加注黄油不应超过油腔的2/3,以免轴承过热.●每次检修和更换电机时,必须注意接线相应,应保证风机叶轮俯视顺时针方向旋转.●皮带传动机构的皮带应保持一定的张紧力。
如过于松弛,则电机的动力无法有效的传递至风机,风机效率下降,甚至造成皮带飞出的事故。
P 型系列空气冷却器使用说明书泰州市裕华制冷设备制造有限公司空气冷却器一、概况P型系列空气冷却器（又称冷风机）是一种使用于各种冷库的冷却降温设备，P型系列空气冷却器有PC、PCE和PE型三种型式分别使用于不同库温的冷库。
它具有结构紧凑、重量轻、不占有冷库实用面积等优点，与自然对流排管相比，它能使冷库内贮藏的食品迅速降温，大大提高了贮藏食品的保鲜度。
二、产品用途P型系列空气冷却器可与不同制冷量的压缩冷凝机组配套，用于不同库温的冷库中作为制冷设备。
其中PC型适用于库温为0℃左右的冷库，如保存鲜蛋或蔬菜的库。
PCE型适用于库温为-18℃左右的冷库，作为肉类、鱼类等冷冻食品的冷藏用。
PE型适用于库温为-25℃或低于-25℃的冷库作为鲜肉或鲜鱼制品及调理食品等冻结用。
三、产品特点1、壳体采用喷塑钢板、轧花铝板或不锈钢板，耐腐蚀，外形美观，可满足不同可户的需求。
2、盘管以错排方式布置，传热效率高，通过机械胀管将铝翅片套在铜管上连接牢靠。
3、该产品为厂内配线，所有接线均置于一个接线盒内，安装维修方便。
4、选用的电机和风叶，噪声低，运转平稳并可根据用户需要选用防爆型电机。
5、排水管中央最低处设有排水接口，排水可靠。
6、槽型吊架，安装方便。
7、U型管状不锈钢管及氧化镁填料的电加热管，置于盘管中，融霜效果良好，几种可选的融霜方式（电加热管、水、热气）。
8、出厂前全部经过保压充氮处理。
四、型号说明空气冷却器的传热面积（m2）空气冷却器的名义制冷量KW（kcal/h）融霜方式：对电融霜省略此相，W表示水冲霜适用制冷剂（对R22省略此项）冷却物冷藏库用C表示冻结物冷藏库用CE表示速冻库用E表示吊顶式用P表示五、冷风机安装前的检查1、在拆开外包装后应检查各连接部件有无松动，如有松动应重新紧固。
2、检查轴流风机的风叶安装在电机轴上是否牢固，风叶与防护罩是否碰伤。
3、如因运输而造成冷风机有损坏或变形时，应修复后才能吊装。
1大卡/小时=1.163W适用于库温：-2 ～ +5℃的冷库备注:根据用户需要可进行特殊加工1大卡/小时=1.163W适用于库温：+2 ～ -20℃的冷库备注:1、可根据用户要求加工成水冲霜； 2、根据用户需要可特殊加工。
运行维护手册版 本 号： 1 编制 审核： 修改纪录 日期： 日期：空冷凝汽器运行维护手册文件号：C00009036运行维护手册C00009036空冷岛运行维护手册-1.docpage 2 of 11目录 页次 1 概述 31.1 缩写代码 31.2 参考系统图（P&I ）图 31.3 主要部件 3见各项目供货范围 3 2 运行32.1 抽真空系统 32.1.1 水环真空泵（或射汽抽气器）单元 3 2.2 空冷凝汽器 (ACC)32.2.1 概述 32.2.2 运行 32.2.3 ACC 的启动、ACC 的停机、ACC 风机控制的配置等 3详见“Cxxxx9025控制描述”。
32.2.4 特殊运行工况 33.维护管理33.1风机的维护管理 33.1.1开机的准备及步骤 33.1.2试运转 33.1.3风机维护 33.2减速机的维护管理 33.2.1减速机的启动 33.2.2维护 3运行维护手册1 概述1.1 缩写代码ACC 直接空冷凝汽器（Air cooled condenser）Condenser bundles 顺流凝汽管束（Co-current flow heat exchanger bundles）Dephlegmator bundles逆流凝汽管束（Counter-current flow heat exchanger bundles）PCMS 电厂控制和监测系统（Plant’s control and monitoring system）Control SystemGC 功能组控制（Group control）SGC 子组控制Sub-group control1.2 参考系统图（P&I）图相关的参考系统图(P&I 图)见：ACC系统(P&I )图Cxxxx66001.3 主要部件见各项目供货范围2 运行2.1 抽真空系统在启动阶段各台水环真空泵（或射汽抽气器）的启停是根据需要自动控制的。
Air Cooled CondenserOperation and MaintenanceManual空冷凝汽器运行维护手册Ref.-No.: D3461_MAN7901Purchaser 采购方: ShanDong Electric Power Engineering山东电力设计院End User最终用户: Shenhua Yili Power Plant 神化亿利电厂SPX - Contract - No. 合同号: 260-03461SPX Cooling Technologies GmbHErnst-Dietrich Platz 240882 RatingenPhone电话 : +49 - 2102 - 1669-786Fax传真 : +49 - 2102 - 1669-215Project Manager项目经理 : Mrs. Hui Sun-DegenhardPhone电话 : +49 - 2102 - 1669-239Final Issue终版 :Revision版本 : 0Date日期 :Register登记 : d0025956_Index目录1.GENERAL SAFETY CONCEPT一般安全概念错误！未定义书签。
1.1G ENERAL I NSTRUCTIONS总说明错误！未定义书签。
1.2S AFETY I NSTRUCTIONS FOR O PERATION,I NSPECTION AND R EPAIR错误！未定义书签。
运行,检查,修理安全指导错误！未定义书签。
1.3S TART-UP S AFETY安全启动错误！未定义书签。
1.4S AFETY DURING P ERMANENT O PERATION持续运行时的安全措施错误！未定义书签。
1.5S HUT-DOWN S AFETY P ROCEDURE停机安全步骤错误！未定义书签。
1.6D ANGER WHEN S AFETY I NSTRUCTIONS ARE NOT FOLLOWED不遵守安全指导的危险错误！未定义书签。
发电机组降温冷却专家KCWQ系列空冷器KCW系列空气冷却器1.应用范围：用于火电机组、水轮发电机组运行环境的空气降温、火电氢冷机组的氢气降温；2.设备结构及技术规格选型：2.1设备结构经我公司多年来对电站使用的各种空冷器过程中，进行使用情况综合分析，对空冷器的设计、制造工艺实施了一系列的改进完善，形成我公司KCW系列空冷器，经改进完善后的空冷器，其结构及各项指标更加满足用户的使用要求；（空冷器设计压力：0.6〜I.OMpa；工作压力：0.2〜0.5Mpa）KCW系列空冷器，结构以“可卸盖板式”为主，因两侧水室便于拆装，在使用维护过程中便于对水室内部和散热管基管内部进行清洗维护；KCW（系列空冷器主要由左右水室、左右管板、复合式翅片管、上下侧板等主要部件构成，空冷器的水室与管板用螺栓连接（中间使用专用胶垫密封）见下图：1 2 3 4 5 6 7 8 9 101左水室2冷却水进水法兰3冷却水出水法兰4左管板5换热管6下侧板7上侧板8右管板9右水室10 螺栓图2-1 KCWQ “可卸盖板式”空冷器结构2.2技术规格选型KCWQ空气冷却器规格尺寸3.设备特点：3.1 “可卸盖板式”空冷器的左右水室内表面，采用国内先进的“汽车底盘装甲”工艺，进行特殊防腐处理，防止其生锈影响冷却水质，经此工艺加工后的水室内表面，能长期缓解水气腐蚀、冷却水体流动及水体内所含杂质对水室内表面的冲刷撞击，彻底解决了因水室内表面涂漆层脱落、水室内表面生锈等不利因素影响冷却水质的问题；图3-1经“汽车底盘装甲”工艺处理后的水室内表面图3-2基管与管板胀接后照片3.2左右管板采用优质钢板加工，部件外表面采用先进镀锌工艺进行镀锌处理，避免其腐蚀生锈影响冷却水质，并在一定程度上延长了设备使用寿命；翅片管基管与左右管板基管孔处，采用国内最先进的胀接工艺进行胀接密封，确保冷却水在翅片管基管内部正常循环流动，冷却水不会因渗漏随被降温的热空气进入到机组内部，确保机组安全运行（见图3-2）；3.3两块侧板与左右管板连接形成空冷器主体，侧板主梁采用国标等边角钢设计制造，（可根据电站实际安装需要，在侧板主梁上钻出一定数量的把合孔，便于空冷器主体与定子及相关设备部件连接并密圭寸）；3.4 KCW（系列空冷器使用的核心换热元件是复合式翅片管，复合式翅片管的基管与铝翅片的接触热阻低，在较大温度变化范围内能保持稳定的低值，传热系数高，基管由外层铝管壁保护不受腐蚀，对温度突变及振动有良好抗力；单位长度换热面积大，传热量高，结构可靠，寿命长；翅片表面光滑无毛刺无皱折、不易结垢不易变形、易于清洗（可用高压水冲洗），易于排除表面积水、流动阻力低，能长期保持良好的传热性能。
