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1、摘要本次毕业设计的课题为青岛市某小区的供暖系统，包括供热外网和换热站的设计。该小区包括住宅楼与商业用楼，总建筑面积为78730m2，热用户计算热负荷为3741.3kW。小区换热站以饱和蒸汽为一次热媒，采暖供回水温度为95/70℃。首先，根据设计题目搜集资料，确定供热系统的相关方案。包括集中供热系统的选择、枝状管网的确定、热负荷的计算、热媒的选择及其参数的确定。然后，进行小区供热外网的设计。包括管道的敷设、管网中固定支架、阀门井、补偿器等附件的位置与数量的确定，管道的保温，管网的水力计算。通过水力计算确定管网的管径以及压力损失，并进行不平衡率的计算，尽量使每段管
2、线都能达到水力平衡。接着，确定换热站系统流程；对换热器、循环水泵、定压水泵等主要设备进行选型计算；合理布置所有的设备以及它们之间的管道。同样，还要对换热站内部进行水力计算以求得各种管路的管径。最后，根据设计的供暖系统的特点提出合理有效的运行调节方法。关键词：供热外网；换热站；水力计算；运行调节55AbstractThisisaheatingsystemdesignaboutonedistrictinQingDaoCaty,whichincludesoutdoorheatingpipenetworkandheattransferstation.Thedistri
3、ctcontentsresidencebuildingandbusinessbuilding,thetotalconstructiongareaisabout78730m2andheatloadisabout3741.3kW.Intheheatingsystem,theheattransferstationwhichtakesstaturationSteamashightemperatureheatmediumand95/70℃watercirculatingwaterasheat-supplying-medium.Firstly,needingtocolle
4、ctsomeinformationbasisthedesignsubject,andconfirmingthecorrelationschemeabouttheheatingsystem.Itcontentstheoptionoftheconcentrateheatingsystem,theconfirmingofbranchpipelinenetwork,thecalculateoftheheatingsystem,thechoosingofheatmediumanditsparameter.Secondly,puttingupthedesignaboutt
5、heoutdoorheatingpipenetwork.Itcontentsthelayingofpipe,definingthepositionandnumberoftheaccessoriessuchasfixedsupports,valvewellsandcompensators,thedefiningofthepipeline,thehydrauliccomputationofthepipeline.Throughthehydrauliccomputation,wecanconfirmthediameterofthepiplingandthepress
6、urelossing,computingthehydraulicunbalancerateinordertomakethehydraulicbalanceoneverypipling.Then,theprocessofheatingmediumflowisdetermined.Afterthetypeofheatexchanger,watercirculatingpumpsandmake-upwaterpumpsarechosen;theyandthepipelinesamongthemarearrangedrationally.Also,thehydraul
7、iccomputationofinternalheattransferstationshouidbeworkoutedtomeettheneedofeverypipling.Finally,accordingtothecharacteristicoftheheatingsystem,areasonableandeffectiveoperationandregulationmethodshouldbeproposed.Keywords:outdoorheatingpipenetwork;heattransferstation;hydrauliccalculati
8、on;operationandregu
