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办公楼中央空调设计摘要本设计为天津市XX公司办公楼中央空调系统,拟为之设计合理的中央空调系统,为室内工作人员提供舒适的工作环境。建筑共四层，总面积为4446.9m²，首层净高4.2m，其他三层净高均为3.9m。要求采用空调夏季制冷冬季供暖。设计的空调系统采用风机盘管—新风系统,选用水冷机组制冷冻水供冷，冬季依靠市政集中供热采暖。设计的内容包括：选定合适空调系统的类型并确定设计方案，计算部分也十分重要，例如：空调冷负荷的计算；空调系统的划分与系统方案的确定；冷源的选择；风系统的设计与计算；室内送风方式与气流组织形式的选定；水系统的设计、布置与水力计算；风管系统与水管系统保温层的设计等内容。除此之外，还需要进行空调末端处理设备及机房辅助设备及的选型。需要结合所选择的空调系统的特点及办公楼的建筑结构选择合适的空调机组及末端设备，合理的布置吊顶内风管与水管的位置。并根据所选择的空调机组选配合适的辅助设备：冷冻水循环水泵，冷却水循环水泵，开式水箱，冷却水塔，及相应的水管风管阀门等。关键词：办公楼，中央空调，水冷机组，风机盘管—新风系统THECENTRALAIR-CONDITIONOFOFFICIALBUILDINGABSTRACTThedesignofcentralair-conditioningsystemforthebuildingofaTianjincompanyisaimedtogetacomfortableworkingconditionindoors.Thetotalareaofthebuildingis4446.97m².Theheightofthefirstflooris4.2meters,andtheotherthreefloor’heightsareall3.9meters.Theair-conditionsystemisdesignedtosupplycoolairinsummer,andafancoilunits(FCUs)--freshairsystemisselectedandcentralscrewwaterchillersareusedtoprovidethechillingwaterneeded.Inwinter,themunicipalcentralheatingsystemisusedtosupplyheatandkeepofficialroomwarm.Someofthemainpointsinthisdesignaregivenasfollows:Todesignanappropriateair-conditioningsystemforthebuilding,theoverallanalysisisimportant.Thisincludesthecalculation,suchascoolingloadcalculation,theestimationofsystemzoning;thedesignofairductsystemandcalculation;theestimationofairdistributionmethodandtheselectionofrelevantequipments;thedesignofwatersystemandtheanalysisofitsresistancelosses;theplanoftheinsulationofairductandchilledwaterpipes;etc..Meanwhile,equipmentselectionisalsoanessentialpartofthedesign.Accordingtotherequirement,afancoilunits(FCUs)--freshairsystemisappropriate.Thus，themainprocessequipment,i.e.thechiller,thefancoilunits,thecirculatingwaterpumps,thecoolingtower,arealsodeterminedinthedesignconsideringtheircharacteristicsandworkingconditions.KEYWORDS:officialbuilding,centralairconditioning,coolingwaterchillerfancoilunits(FCUs)--freshairsystem目录第一章绪论.....................................................................................................1第二章系统方案的选择确定............................................................................3第三章工程概况...............................................................................................5§3.1建筑特点............................................................................................5§3.2建筑相关资料.....................................................................................5§3.3室外设计参数.....................................................................................6§3.4室内设计参数.....................................................................................7第四章空调负荷计算........................................................................................8§4.1围护结构瞬变冷负荷计算原理..........................................................8§4.1.1外墙和屋面瞬变传热引起的冷负荷.......................................8§4.1.2室内传热维护瞬时冷负荷.......................................................8§4.1.3外窗瞬变传热引起的冷负荷...................................................9§4.1.4设备散热形成的冷负荷...........................................................9§4.1.5新风冷负荷............................................................................11§4.2办公楼围护结构冷负荷计算............................................................11§4.3各房间送风方式的确定...................................................................14§4.4办公楼新风量和新风负荷的确定...................................................15§4.4.1新风负荷计算举例................................................................15§4.4.2办公楼新风冷负荷计算书.....................................................16第五章风机盘管加新风系统选型计算...........................................................21§5.1风机盘管系统选型计算...................................................................21§5.2新风机组的选型...............................................................................24第六章空调风系统.........................................................................................25§6.1空调房间气流组织...........................................................................25§6.2风口的布置......................................................................................25§6.2.1新风入口注意事项................................................................25§6.2.2风道的布置和制作要求.........................................................25§6.2.3新、排风口的防雨百叶尺寸的确定.....................................26§6.2.4风管阀门的选择....................................................................27§6.2.5送风口的布置原则................................................................27§6.3风口的选择.....................................................................................27§6.4新风管的设计计算..........................................................................28§6.6办公区及卫生间排风......................................................................30第七章空调水系统.........................................................................................32§7.1空调水系统的选型比较..................................................................32§7.2空调水系统的布置..........................................................................33§7.3风机盘管水系统水力计算........................................