供暖系统毕业设计说明书

供暖系统毕业设计说明书

供暖系统毕业设计说明书

摘 要

随着我国城市建设事业的发展，以及国家对于能源与环境保护的要求，供暖系统的规模从单幢采暖系统发展成为中大型区域集中供暖系统，出现了大量住宅，公共建筑的集中供暖系统。集中供暖在节能和坏境保护方面都有很大的优势，发展速度很快。

本设计题目为青海省西宁市世家馨城综合楼的集中供暖设计，在设计中包括室内外设计参数的确定、供暖热负荷的计算、供暖系统方案的选定、散热器类型的选定及供暖系统水力计算。

选择供热系统需要的各种必要的设备和水泵等。整个设计严格按照规范，充分考虑技术，经济同时关注节能，使整个热网有一个较高的效率。

关键词：区域供热,热负荷,散热器,热网，系统

ABSTRACT

供暖系统毕业设计说明书

With the city construct's developing and energy save and environment require,the

heating systems have changed from single heating to district heating.So many district heating system come out in many north cities in China.

My design title is the heating network designing of xining .In this design ,manual of

heating system mainly includes indoor and outdor parameters,calculation of heat load,choice of heating system,decision of the type of radiator and definite diameters of water pipe through calculation of water power.

I choose the basic equipment such as bump,heat exchanger with these calculatings.In

my design, I supply some districts with hot water .All the designs have a stict to the bans,considering the and enconme and energy save,in order to make the network be a high efficient.

KEY WORDS :district heating ,network design ,heat Load ，system

目 录

供暖系统毕业设计说明书

前 言 ............................................................................................................................................ 1 1 设计资料 .................................................................................................................................. 2 1.1 设计题目 ........................................................................................................................... 2 1.2 设计任务和目的 ............................................................................................................... 2 1.3 设计原始资料 ................................................................................................................... 2 1.3.1 设计建筑物所在地区及地形资料 ............................................................................ 2 1.3.2 土建资料 .................................................................................................................... 2 1.3.3 气象资料 .................................................................................................................... 2 1.3.4 动力资料 .................................................................................................................... 3 2 设计参数的计算与确定 .......................................................................................................... 4 2.1 设计温度的确定 ............................................................................................................... 4 2.2 建筑围护结构传热系数的确定与校核 ........................................................................... 4 2.2.1 围护结构的热工性能 ................................................................................................ 4 2.2.2 计算围构护结的传热系数 ........................................................................................ 4 2.2.2.1 外墙传热热阻和最小传热热阻的校核 ............................................................. 5 2.2.2.2 内墙传热热阻和最小传热热阻的校核 ............................................................. 6 2.2.2.3 屋面传热热阻和最小传热热阻的校核 ............................................................. 7 2.2.2.4 确定地面的传热系数 ......................................................................................... 8 3 供热系统热负荷的计算 ........................................................................................................ 10 3.1 房间内的热损失 ............................................................................................................. 10 3.2 通过围护结构的耗热量 ................................................................................................. 10 3.2.1 通过围护结构的基本耗热量 .................................................................................. 10 3.2.2 通过围护结构的朝向修正耗热量 .......................................................................... 11 3.2.3 通过围护结构的风力附加耗热量 .......................................................................... 11 3.2.4 通过围护结构的高度附加耗热量 .......................................................................... 11 3.3 计算冷风渗透耗热量 ..................................................................................................... 11 3.4 外门冷风侵入耗热量的计算 ......................................................................................... 12

供暖系统毕业设计说明书

3.5 供暖房间热负荷计算示例 ............................................................................................. 12 4 供热系统形式的选择与设计 ................................................................................................ 14 4.1 供热系统形式的选择 ..................................................................................................... 14 4.1.1 按系统循环动力 ...................................................................................................... 14 4.1.2 按管道连接及热媒流经路程 .................................................................................. 14 4.1.3 按系统每组立管数不同 .......................................................................................... 14 4.1.4 按供水方式 .............................................................................................................. 14 4.2 管道的布置 ..................................................................................................................... 14 4.3 散热器的选择计算及散热器的布置 ............................................................................. 15 4.3.1 散热器材质的选择 .................................................................................................. 15 4.3.2 散热器散热面积和片数的计算 .............................................................................. 15 4.3.3 散热器的计算示例 .................................................................................................. 16 4.3.4 散热器的布置 .......................................................................................................... 17 5 室内的水力计算 .................................................................................................................... 18 5.1 室内热水供暖系统管路水力计算的基本原理 ............................................................. 18 5.2 室内热水供暖系统管路不平衡率校核计算 ................................................................. 18 5.2.1 室内热水供暖系统各管段压力计算 ...................................................................... 18 5.2.2 室内热水供暖系统水力不平衡率计算 .................................................................. 19 5.2.2.1 同程式系统水力计算示例 ............................................................................... 19 5.2.2.2 异程式系统水力计算示例 ............................................................................... 20 6 系统定压方式选择 ................................................................................................................ 22 6.1 用户支管定压 ................................................................................................................. 22 6.2 热水供热系统定压方式 ................................................................................................. 22 6.2.1 膨胀水箱定压 .......................................................................................................... 22 6.2.2 普通补水泵定压 ...................................................................................................... 22 6.2.3 气体定压罐定压 ...................................................................................................... 22 6.2.4 蒸汽定压 .................................................................................................................. 22

供暖系统毕业设计说明书

6.2.5 补水泵变频调速定压 .............................................................................................. 23 6.2.6 自来水定压 .............................................................................................................. 23 6.2.7 溢水定压形式 .......................................................................................................... 23 6.3 本设计的定压方式 ......................................................................................................... 23 7 系统附属设备选型 ................................................................................................................ 24 7.1 循环水泵的布置与选择 ................................................................................................. 24 7.2 补给水泵的选择计算 ..................................................................................................... 27 7.2.1 补给水泵的选择要求 .............................................................................................. 27 7.2.2 补给水泵的选择计算 .............................................................................................. 27 7.3 除污器的选择 ................................................................................................................. 28 7.4 集气罐的选择 ................................................................................................................. 29 8 管道的敷设与保温 ................................................................................................................ 30 8.1 管道的敷设 ..................................................................................................................... 30 8.2 管道的保温 ..................................................................................................................... 30 8.3 管道的防腐 ..................................................................................................................... 30 8.4 供热系统的主要节能措施 ............................................................................................. 31 总 结 .......................................................................................................................................... 32 参考文献 .................................................................................................................................... 33 致 谢 .......................................................................................................................................... 34 附表一 ........................................................................................................................................ 35 附表二 ........................................................................................................................................ 60 附表三 ........................................................................................................................................ 73