CHAPTER19DATAPROCESSINGANDTELECOMMUNICATIONFACILITIES第19章数据处理和电信设施DesignCriteriaHVACLoadconsiderationsHVACSystemsandComponentsAirDistributionAncillaryspacesOtherSystemsandconsiderations19.1设计标准19.2空调负荷注意事项19.3空调系统和组件19.4气流组织19.5辅助空间19.6其它系统和注意事项DATACOM(dataprocessingandtelecommunications)facilitiesarepredominantlyoccupiedbycomputers,networkingequipment,electronicequipment,andperipherals.ThemostdefiningHVACcharacteristicofdataandcommunicationsequipmentcentersisthepotentialforexceptionallyhighsensibleheatloads(oftenordersofmagnitudegreaterthanatypicalofficebuilding).Inaddition,theequipmentinstalledinthesefacilitiestypically:数据通信（数据处理和电信）设施主要由计算机、网络设备、电子设备和其它辅助设备组成。数据和通讯设备中心空调最主要的特征是，需要应对极高的显热冷负荷（要比普通的商业办公楼负荷大得多）。另外，空调系统要具有以下这些功能：.Servesmission-criticalapplications(i.e.,continuousoperation).Hasspecialenvironmentalrequirements(temperature,humidity,andcleanliness).Hasthepotentialfordisruptiveoverheatingandequipmentfailurecausedbylossofcooling·满足特定的应用（例如：持续运行）；·具备特殊环境要求（温度、湿度和洁净度）；·在突发性过热和由于设备损坏不能持续制冷的情况下，系统能继续冷却电子设备。Designofanydatacomfacilityshouldalsoaddressthefactthatmostdatacomequipmentwillbereplacedmultipletimeswithmorecurrenttechnologyduringthelifeofthefacility.AsdescribedinDatacomEquipmentPowerTrendsandCoolingapplications(ASHRAE2005a),typicaldatacomequipmentproductcyclesare1to5years,whereasfacilitiesandinfrastructureHAVClifecyclesof10to25years.Replacementequipmenthashistoricallyrequiredmoredemandingpowerandcoolingrequirements.任何数据通信设施的设计时，都要面对这样一个事实：在通信设施的使用寿命期间，随着技术的发展，大量现有的通信设备将会被将来的新设备更换掉。在数据通信设备电源的发展过程和冷却应用中(ASHRAE2005a)，典型的数据通讯设备产品寿命为1至5年，而空调设施和基础设施的寿命为10年至25年。新设备对电功和制冷量要求的会更大。Understandingthesecriticalparametersisessentialtodatacomfacilitydesign.了解这些关键因素对数据通信设施的设计是必不可少的。ThepreparationofthischapterisassignedtoTE9.9,Mission-criticalFacilities,TechnologySpaces,andElectronicEquipment.由ASHRAE中负责“重要设施、工艺房间与电子设备”的技术委员会TC9.9编著。DesignCriteria19.1设计标准Typesofdatacom(ASHRAE2005a)equipmentthatrequireairconditioningtomaintainproperenvironmentalconditionsinclude数据通信中心(ASHRAE2005a)的空调系统的工作环境中，包含的数据通信设备类别有：·Computerservers(2Uandgreater)·Computerservers(1U,blade,andcustom)·Communication(High-density)·Communication(Extreme-density)·tapestorage·Storageservers·Workstations(standalone)·Otherrack-andcabinet-mountedequipment·服务器(2台或更多)·服务器(1台,black,andcustom)·通讯(高密度)·通讯(超高密度)·磁带存储器·存储服务器·工作站(独立)·其它机架和机柜安装设备Personnelalsooccupydatacomfacilities,buttheiroccupancyistypicallytransientandenvironmentalconditions(e.g.,temperature,noise)aremoretypicallydictatedbyequipmentneeds.However,humanoccupancyinsmallerdatacomfacilitiesmayinfluencetheventilationairquantity.Adatacenterisabuildingorportionofabuildingwhoseprimaryfunctionistohouseacomputerroomanditssupportareas;datacenterstypicallycontainhigh-endserversandstorageproductswithmission-criticalfunctions.Personnelalsooccupydatacomfacili...
VIP
