上海同济设计院教授级高工空调水系统设计培训讲义(25页完整版·绝密)

1、空调水系统系统系统 开式、闭式 两管制、四管制 同程、异程 定流量、变流量 一次泵、二次泵空调水系统空调水系统一次泵变流量系统一次泵变流量系统二次泵变流量系统二次泵变流量系统内容内容 沿程阻力 局部阻力空调水管路水力计算空调水管路水力计算22PjNoImageNoImage4.3.4.3.空调水系统管径的确定空调水系统管径的确定 1、管内水流速推荐值（m/s）管径管径(DN)(DN)流量流量 m m3 3/h/h0.4m/s0.4m/s0.6m/0.6m/s s0.8m/s0.8m/s1.0m/1.0m/s s1.2m/1.2m/s s1.4m/s1.4m/s1.6m/1.6m/s s1.8m

2、/s1.8m/s2.0m/2.0m/s s2.2m/2.2m/s s2.4m/s2.4m/s2.6m/2.6m/s s2.8m/s2.8m/s3.0m/3.0m/s s20200.50.50.70.70.90.91.11.11.41.41.61.61.81.82.02.02.32.32.52.52.72.72.92.93.23.23.43.425250.70.71.11.11.41.41.81.82.12.12.52.52.82.83.23.23.53.53.93.94.24.24.64.64.94.95.35.332321.21.21.71.72.32.32.92.93.53.54.14.1

3、4.64.65.25.25.85.86.46.46.96.97.57.58.18.18.78.740401.81.82.72.73.63.64.54.55.45.46.36.37.27.28.18.19.09.010.010.010.910.911.811.812.712.713.613.650502.82.84.24.25.75.77.17.18.58.59.99.911.311.312.712.714.114.115.615.617.017.018.418.419.819.821.221.265654.84.87.27.29.69.611.911.914.314.316.716.719.1

4、19.121.521.523.923.926.326.328.728.731.131.133.433.435.835.880807.27.210.910.914.514.518.118.121.721.725.325.329.029.032.632.636.236.239.839.843.443.447.047.050.750.754.354.310010011.311.317.017.022.622.628.328.333.933.939.639.645.245.250.950.956.556.562.262.267.967.973.573.579.279.284.884.812512517

5、.717.726.526.535.335.344.244.253.053.061.961.970.770.779.579.588.488.497.297.2106.0106.0114.9114.9123.7123.7132.5132.515015025.425.438.238.250.950.963.663.676.376.389.189.1101.8101.8114.5114.5127.2127.2140.0140.0152.7152.7165.4165.4178.1178.1190.9190.920020045.245.267.967.990.590.5113.1113.1135.7135

6、.7158.3158.3181.0181.0203.6203.6226.2226.2248.8248.8271.4271.4294.1294.1316.7316.7339.3339.325025070.770.7106.0106.0141.4141.4176.7176.7212.1212.1247.4247.4282.7282.7318.1318.1353.4353.4388.8388.8424.1424.1459.5459.5494.8494.8530.1530.1300300101.8101.8152.7152.7203.6203.6254.5254.5305.4305.4356.3356

7、.3407.1407.1458.0458.0508.9508.9559.8559.8610.7610.7661.6661.6712.5712.5763.4763.4管径管径(DN)(DN)流速推荐值流速推荐值m/s:m/s:2020252532324040505065658080100100125125150150200200250250300300350350闭式系闭式系统统0.5-0.5-0.60.60.6-0.6-0.70.70.7-0.7-0.90.90.8-10.8-10.9-0.9-1.21.21.1-1.1-1.41.41.2-1.2-1.61.61.3-1.3-1.81.81.

8、5-1.5-2.02.01.6-1.6-2.22.21.8-1.8-2.52.51.8-1.8-2.62.61.9-1.9-2.92.91.6-1.6-2.52.5开式系开式系统统0.4-0.4-0.50.50.5-0.5-0.60.60.6-0.6-0.80.80.7-0.7-0.90.90.8-0.8-1.01.00.9-0.9-1.21.21.1-1.1-1.41.41.2-1.2-1.61.61.4-1.4-1.81.81.5-1.5-2.02.01.6-1.6-2.32.31.7-1.7-2.42.41.7-1.7-2.42.41.6-1.6-2.12.1NoImageNoImage

9、2、水系统的管径和单位长度阻力损失经济比摩阻 两种比摩阻范围下差得的管径及比摩阻值比较G/thG/th 10203040506080100120150200500管径DN17080100125125125150200200200250350/mmDN280100125150150150200200200250250350比摩阻R1142228179971522191484261955461Pa/mR25779553758832742613154设备名称阻力（kPa）备注离心式冷冻机蒸发器3080按不同产品而定冷凝器5080按不同产品而定冷却塔2080不同喷雾压力冷热水盘管2050水流速度在0.81.5m/s左右热交换器2050风机盘管机组1020风机盘管容量愈大，阻力愈大，最大30kPa左右自动控制阀2040设备阻力损失空调水系统中常用的定压方式有二种：膨胀水箱定压；补给水泵定压+气压定压罐定压；系统定压点：选择在循环水泵的吸入口处5.2. 5.2. 水系统的定压水系统的定压空调核