河北联合大学毕业设计说明书--河北理工大学毕业设计说明书-PAGEI-摘要本设计为唐山凤凰园火锅店风冷热泵空调。设计内容包括：方案的比较、负荷计算、空气处理过程的选择、设备选型，水管路和风管路系统的设计及附属设备的选型，并进行设计说明书的编制和施工图的绘制。通过计算，本工程夏季总冷负荷为531.05kW，冬季总热负荷为70.98kW。制冷设备选用机组的制冷量为620kW。建筑物的冷源由机组提供，热源由市政管网提供，用板式换热器将95℃/70℃的热水换至60℃/50℃供空调使用。本工程主机选用风冷热泵机组。风冷热泵机组是一种节能、节水和环保的设备,一机冬夏两用,具有设备利用率高的特点,但也存在冬季低温工况下供热不足、高湿区域结霜严重等问题,这些问题阻碍了风冷热泵机组北扩的使用趋势。本文分析了提高热泵机组本身的能效比以节能、改进除霜控制逻辑以减少不必要的除霜而导致的能耗、增加热回收等节能手段以降低能耗、采用双级压缩以拓宽热泵的使用范围等措施,对于促进风冷热泵机组更广泛的应用具有积极的意义。整个工程主要采用风机盘管加独立新风形式，水系统采用异程式、一次泵、变流量系统。关键词：空调，热泵，通风，火锅店，设计AbstractTheairconditioningandventilationsystemforthechafingdishrestaurantoffenghuagnyuaninTangshanwasdesigned,incluidingschemecomparision,loadcalculation,airprocessselection,equipmentselection,watersystemandairsystemdesign,andappurtenancesselection.Thedesignspecificationsandtheconstructiondrawingwasworkedout.Thesummercoldloadis531.05kW,andthewinterheatloadis70.98kWinthisproject.Twowatercoolingscrewrodtypecoldwaterunitswhoserefrigerationquantityis620kWwereselectedforrefrigeration.Thecityheatsourcewasusedforheating.Thehotwater95℃/70℃waschangedto60℃/50℃withdischeatinterchanger,andthensupplyingtheairconditioning.TheAircooledheatpumpischoosedforthemainengineinthisproject.Aircooledheatpumpisenergy-saving,water-savingandenvironmental-friendlyequipment.Itcanbefullyusedbothinsummerandwinter.Butitalsogetsomedisadvantageslikeprovidinglessheatingcapacityatlowambienttemperature,heavyfrostinhighhumidityregions,etc,whichhindersitfromapplicationinnorthofChina.InthispapertheauthoranalyzedtoincreaseASHPCOPforenergysaving,improvingdefrostcontrollogictoreducepowerconsumptionduetotheunnecessarydefrost,addfunctionslikeheatrecoverytoreducepowerconsumption,usetwostagecompressiontobroadenitsapplication,whichisverybeneficenttotheperfectionofASHP.TheFCU+PAUsystemwasselectedfortheproject.Thedirectreturnsystem，theprimarypumpsystemandthevariablecurrentquantitysystemwasselectedforthewatersystemaftertheanalysisandcomparison.Keywords:airconditioning,ventilation,libra