机械5

摘要 随着美丽中国的口号的提出，节能减排在建设和谐社会中的推广和实施，集中供暖相对于局部供暖显示了巨大优势，分户热计量更是受到很大关注。 本课题就对沉阳高层建筑集中供暖系统的设计，熟悉供暖设计的程序、内容和基本原则，学习设计的方法步骤，进一步提高运算、制图和使用资料的能力，巩固所学的知识，培养这些知识解决设计问题的能力。 在设计中，通过对设计情况的了解，确定建筑物的热负荷，供暖系统形式的选择，水力计算和校核计算；以及建筑物的平面图和系统原理图。 设计中采用的是采用机械循环、双管制垂直式的上供下回系统。钢制柱式800×600，散热片安装形式为异侧的上供下回，供水立管之间为异程式，户内系统为水平单管顺流式。设计供回水温度为85/60℃。 换热站的设计主要包括设备的布置，定位尺寸确定，换热器的选型，循环水泵，补给水泵的选型及辅助设备的选择计算。 设计说明书中附有所有计算的数据。 关键词：分户热计量散热器机械循环单管顺流热负荷 abstract With the beautiful Chi
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nstream thermal load 目录 引言3 第1章设计概况4 1.1工程名称4 1.2地理位置4 1.3建筑概况4 1.4建筑条件4 1.4.1建筑物层高4 1.4.2围护结构热工计算参数4 1.4.3热源条件4 1.4.4设计内容4 第2章采暖热负荷计算5 2.1采暖热负荷计算原理5 2.1.1围护结构基本热负荷5 2.1.2围护结构的附加（修正）耗热量6 2.1.3冷风渗透耗热量7 2.1.4冷风侵入耗热量9 2.2某小区采暖热负荷计算9 2.2.1某小区的室外气象参数9 2.2.2室内不同类型房间的设计温度9 2.2.3热负荷计算9 第3章散热设备的计算与选取13 3.1散热设备的选取13 3.1.1散热器选取的规定13 3.1.2散热器布置的注意事项13 3.2散热器选型计算14 3.2.1散热器的选型计算原理14 3.2.2房间的散热器计算结果15 第4章水力计算17 4.1.1管路形式的选择17 4.1.2管路布置与敷设17 4.2系统水力计算步骤17 4.2.1支管的水利计算步骤： 17 4.2.2对单元立管进行水利计算18 4.2.3：不平衡率的计算。 19 第五章换热站设计21 5.1换热器的选择与计算21 5.2水泵和水处理设备的选择与计算22 2、补给水泵23 5.3、水处理设施选择23 5.4其它设备选择23 5.5:换热站内各条管路管径选择. 24 总结26 致谢27 参考文献28