HVAC知识培训培训内容Day2：1、空调水系统2、冷冻水系统控制原理3、Honeywell风阀和水阀介绍4、水阀选型计算公式空调系统的基本功能空气的状态参数焓湿图焓湿图的组成大家应该也有点累了，稍作休息显热和潜热空气的状态变化过程空气的典型状态变化过程等焓加湿过程利用定量的水通过喷洒与一定状态的空气长时间直接接触，则此种水或水滴及其表面的饱和空气层的温度即等于湿空气的湿球温度，因此，此时空气状态的变化过程就近似于等焓过程。热湿比ε＝4.19ts等焓减湿过程利用固体吸湿剂干燥空气时，湿空气的部分水蒸汽在吸湿剂的微孔表面上凝结，湿空气含湿量降低，温度升高热湿比ε＝0空气的状态变化过程（续二）练习1练习1（续一）练习1（续二）混合空气的处理按负担室内热湿负荷所用的介质分：全空气系统全水系统空气＋水制冷剂按空气处理设备的集中程度：集中式空调半集中式空调系统分散式空调系统按热量传递方式：对流和辐射按被处理空气的来源：封闭式直流式混合式空调系统分类集中式空调系统分类集中式空调系统分类一次回风和二次回风空调的特性定风量空调系统和变风量空调系统定静压控制的变风量空调系统变静压控制的变风量空调系统末端VAV控制器类型压力无关型空调的基本构件加湿设备类型去湿设备常用风门Dependingonhowtheadjacentshaftsarelinkedtogetherthedamperassemblyiseither:-AparallelbladedamperAnopposedbladedamperParallelbladedampersareconstructedsothateachbladerotatesinparallelwithorinthesamedirectionasthebladenexttoitOpposedbladedampersareconstructedsothatadjacentbladesrotateoppositetoeachotherThedamperrotationincreasestheresistancetotheairflowsincetheairisfunnelledthroughasmalleropeningAnopposedbladedampermustbeopenfurtherthanaparalleldampertoobtainthesameresistancetoairflow常用风门常用风门常用风门常用风门通风机离心风机CentrifugalfanswithforwardinclinedbladesUsedinthemajorityofHVACinstallationsassupplyairfansUsedfromsmalldomesticapplicationstolargecommercialapplicationsinmultistorybuildingsCentrifugalfanswithbackwardinclinedbladesGenerallylargerandquieterinoperationthanforwardinclinedbladedfansShouldalwaysbeusedinvariablevolumesystemsMoreexpensivetomanufacturethanforwardinclinedbladedfansandthereforecontractorsarereluctanttousethem典型离心风机AXIALFANSGenerallyusedformovinglargevolumesofairatlowpressuresUsuallydirectlydrivenandmayusevsddrivesforcapacitycontriolUsedinextract,returnair,coolingtowerandsmokecontrolapplicationswherehighnoiselevelsarenotanissueTHEMOSTCOMMONTYPEOFAXIALFANSUSEDINTHEHVACINDUSTRYARE:-PropellerfanTubeaxialfanVaneaxialfanPropellerFansarelowpressurehighairflowunitswhichworkuptoamaximumstaticpressureof19pa.Tubeaxialfansareheavydutyunitsarrangedforinstallationinducts.Itworkuptomaximumstaticpressu