暖通空调设计说明书

7.2 水泵房通风设计 ····································································································· 38 7.3 卫生间的通风设计 ································································································· 39 7.4 风机选型 ················································································································· 39 7.4.1 风管阻力计算 ································································································· 39 7.4.2 风口阻力计算 ································································································· 40 7.4.3 风机参数 ········································································································· 41 设计总结 ····························································································································· 43 主要参考文献 ····················································································································· 44 致 谢 ····························································································· 错误！未定义书签。 附录 ····································································································································· 45 附录2.1 建筑冷负荷汇总表 ························································································ 45 附录2.2 建筑热负荷汇总表 ························································································ 48

1.1 工程概述

本工程为广州市环保局办公楼中央空调系统设计，共6层，总建筑高度为23.4m，为多层建筑，总建筑面积为5945.74㎡，空调面积为3719.76㎡。主要功能房间有办公室、中型会议室、大会议室等。地下室为制冷机房、地下停车场、自行车库、水泵房、配电室等。

1.2 维护结构基本材料

建筑维护结构的基本材料见表1.1

表1.1 建筑结构材料表

传热系数K 结构名称 选用材料 W/(㎡·℃) ①泥砂浆 外墙 ②砖墙，δ=240 ③白灰粉刷属Ⅱ型 外窗 双层玻璃钢窗6mm ①预制细石混凝土板25mm②通风层屋顶 ③卷材防水层④水泥砂浆找平层⑤保温层⑥隔汽层⑦现浇钢筋混凝土板 0.46 3.23 0.82 1.3 室内外空气计算参数

1.3.1 室外空气计算参数

查《民用建筑空调设计》得广州室外气象参数值

1北纬23°03，东经113°19′，海拔6.6m；○2大气压力：夏季100.45KPa，○

冬季101.95KPa；○3室外空气计算参数，夏季空调室外计算干球温度：33.5℃，空调室外计算干球温度：27.7℃；冬季空调室外计算干球温度5℃，空调室外计算相对湿度70%。

1.3.2室内设计参数

第1 页/共 50页

查阅《民用建筑空调设计》，查得各房间的室内参数见表1.2：

表1.2 各功能房间室内设计参数 夏季 房间类型 空气温度 ℃ 一般办公室 高级办公室 门厅 中型会议室 大会议室 26-28 24-27 28 26-28 24-28 相对湿度 % ＜65 ＜60 ≦65 ＜65 ＜60 风速 m／s ≦0.30 ≦0.30 ≦0.30 ≦0.30 ≦0.30 空气温度 ℃ 18-20 20-22 18 18-20 16-18 冬季 相对湿度 % 无规定 ≥35 ≥30 ≥30 ≥35 风速 m／s ≦0.20 ≦0.20 ≦0.20 ≦0.20 ≦0.20

第2 页/共 50页

第2章 负荷的计算

2.1 夏季冷负荷的计算

房间冷、热、湿负荷是确定空调系统送风量及各种设备容量的依据。常需要计算的冷负荷主要有以下几种：

（1）外墙及屋面瞬时传热引起的冷负荷； （2）外玻璃窗瞬变传热引起的冷负荷； （3）透过玻璃窗的日射得热引起的冷负荷； （4）设备散热引成的冷负荷； （5）人体散热引起的冷负荷； （6）照明散热引起的冷负荷；

在冷负荷的计算方法上，本设计采用冷负荷系数法计算空调冷负荷。

2.1.1 外围护结构冷负荷的计算方法

1）外墙和屋面瞬变传热引起的冷负荷

在日射和室外气温综合作用下，外墙和屋面瞬变传热引起的逐时冷负荷按下式计算：

??AK(t?t) (2.1) Qc(?)c(?)R?——外墙和屋面瞬变传热引起的逐时冷负荷，W； 式中 Qc(?) A ——外墙和屋面的面积，㎡；

K ——外墙和屋面的传热系数，W/m2?℃，根据外墙和屋面的不同构造，由

课本上的附录2-2和附录2-3种查取；

tR ——室内计算温度，℃

tc(?)——外墙和屋面冷负荷计算温度的逐时值，℃，根据外墙和屋面的不同类

型分别在附录2-4和附录2-5中查取。对于不同地点，对tc(?)值进行修正，即应为tc(?)?td。其地点修正值td由附录2-6中查取；

第3 页/共 50页