中央空调水系统管径、流速、流量对照表
中央空调水系统管径、流速、流量对照表
管径/流速/流量对照表
管径(DN) 流量 m3/h
0.4m/s 0.6m/s 0.8m/s 1.0m/s 1.2m/s 1.4m/s 1.6m/s 1.8m/s 2.0m/s 2.2m/s 2.4m/s 2.6m/s 2.8m/s 3.0m/s
20 0.5 0.7 0.9 1.1 1.4 1.6 1.8 2.0 2.3 2.5 2.7 2.9 3.2 3.4
25 0.7 1.1 1.4 1.8 2.1 2.5 2.8 3.2 3.5 3.9 4.2 4.6 4.9 5.3
32 1.2 1.7 2.3 2.9 3.5 4.1 4.6 5.2 5.8 6.4 6.9 7.5 8.1 8.7
40 1.8 2.7 3.6 4.5 5.4 6.3 7.2 8.1 9.0 10.0 10.9 11.8 12.7 13.6
50 2.8 4.2 5.7 7.1 8.5 9.9 11.3 12.7 14.1 15.6 17.0 18.4 19.8 21.2
65 4.8 7.2 9.6 11.9 14.3 16.7 19.1 21.5 23.9 26.3 28.7 31.1 33.4 35.8
80 7.2 10.9 14.5 18.1 21.7 25.3 29.0 32.6 36.2 39.8 43.4 47.0 50.7 54.3
100 11.3 17.0 22.6 28.3 33.9 39.6 45.2 50.9 56.5 62.2 67.9 73.5 79.2 84.8
125 17.7 26.5 35.3 44.2 53.0 61.9 70.7 79.5 88.4 97.2 106.0 114.9 123.7 132.5
150 25.4 38.2 50.9 63.6 76.3 89.1 101.8 114.5 127.2 140.0 152.7 165.4 178.1 190.9
200 45.2 67.9 90.5 113.1 135.7 158.3 181.0 203.6 226.2 248.8 271.4 294.1 316.7 339.3
250 70.7 106.0 141.4 176.7 212.1 247.4 282.7 318.1 353.4 388.8 424.1 459.5 494.8 530.1
300 101.8 152.7 203.6 254.5 305.4 356.3 407.1 458.0 508.9 559.8 610.7 661.6 712.5 763.4
350 138.5 207.8 277.1 346.4 415.6 484.9 554.2 623.4 692.7 762.0 831.3 900.5 969.8 1039.1
400 181.0 271.4 361.9 452.4 542.9 633.3 723.8 814.3 904.8 995.3 1085.7 1176.2 1266.7 1357.2
450 229.0 343.5 458.0 572.6 687.1 801.6 916.1 1030.6 1145.1 1259.6 1374.1 1488.6 1603.2 1717.7
500 282.7 424.1 565.5 706.9 848.2 989.6 1131.0 1272.3 1413.7 1555.1 1696.5 1837.8 1979.2 2120.6
600 407.1 610.7 814.3 1017.9 1221.4 1425.0 1628.6 1832.2 2035.7 2239.3 2442.9 2646.5 2850.0 3053.6
管径(DN) 流速推荐值m/s:
20 25 32 40 50 65 80 100 125 150 200 250 300 350 400
闭式系统 0.5-0.6 0.6-0.7 0.7-0.9 0.8-1 0.9-1.2 1.1-1.4 1.2-1.6 1.3-1.8 1.5-2.0 1.6-2.2 1.8-2.5 1.8-2.6 1.9-2.9 1.6-2.5 1.8-2.6
开式系统 0.4-0.5 0.5-0.6 0.6-0.8 0.7-0.9 0.8-1.0 0.9-1.2 1.1-1.4 1.2-1.6 1.4-1.8 1.5-2.0
管径流量流速对照表
0.4m/s0.6m/s0.8m/s1.0m/s1.2m/s1.4m/s1.6m/s1.8m/s2.0m/s2.2m/s2.4m/s2.6m/s2.8m/s3.0m/s
200.50.70.91.11.41.61.82.02.32.52.72.93.23.4
250.71.11.41.82.12.52.83.23.53.94.24.64.95.3
321.21.72.32.93.54.14.65.25.86.46.97.58.18.7
401.82.73.64.55.46.37.28.19.010.010.911.812.713.6
502.84.25.77.18.59.911.312.714.115.617.018.419.821.2
654.87.29.611.914.316.719.121.523.926.328.731.133.435.8
807.210.914.518.121.725.329.032.636.239.843.447.050.754.3
10011.317.022.628.333.939.645.250.956.562.267.973.579.284.8
12517.726.535.344.253.061.970.779.588.497.2106.0114.9123.7132.5
15025.438.250.963.676.389.1101.8114.5127.2140.0152.7165.4178.1190.9
20045.267.990.5113.1135.7158.3181.0203.6226.2248.8271.4294.1316.7339.3
25070.7106.0141.4176.7212.1247.4282.7318.1353.4388.8424.1459.5494.8530.1
300101.8152.7203.6254.5305.4356.3407.1458.0508.9559.8610.7661.6712.5763.4
水管管径-流速-流量对照表
0.4m/s0.6m/s0.8m/s1.0m/s1.2m/s1.4m/s1.6m/s1.8m/s2.0m/s2.2m/s2.4m/s2.6m/s2.8m/s3.0m/s200.50.70.91.11.41.61.82.02.32.52.72.93.23.43/4四分
250.71.11.41.82.12.52.83.23.53.94.24.64.95.31`
321.21.72.32.93.54.14.65.25.86.46.97.58.18.71.2`
401.82.73.64.55.46.37.28.19.010.010.911.812.713.61.5`
502.84.25.77.18.59.911.312.714.115.617.018.419.821.22`
654.87.29.611.914.316.719.121.523.926.328.731.133.435.82.5`
807.210.914.518.121.725.329.032.636.239.843.447.050.754.33`
10011.317.022.628.333.939.645.250.956.562.267.973.579.284.84`
12517.726.535.344.253.061.970.779.588.497.2106.0114.9123.7132.55`
15025.438.250.963.676.389.1101.8114.5127.2140.0152.7165.4178.1190.96`
20045.267.990.5113.1135.7158.3181.0203.6226.2248.8271.4294.1316.7339.38`
25070.7106.0141.4176.7212.1247.4282.7318.1353.4388.8424.1459.5494.8530.110`
300101.8152.7203.6254.5305.4356.3407.1458.0508.9559.8610.7661.6712.5763.412`
水管管径-流速-流量对照表 2
0.4m/s0.6m/s0.8m/s1.0m/s1.2m/s1.4m/s1.6m/s1.8m/s2.0m/s2.2m/s2.4m/s2.6m/s2.8m/s3.0m/s200.50.70.91.11.41.61.82.02.32.52.72.93.23.4
250.71.11.41.82.12.52.83.23.53.94.24.64.95.3
321.21.72.32.93.54.14.65.25.86.46.97.58.18.7
401.82.73.64.55.46.37.28.19.010.010.911.812.713.6
502.84.25.77.18.59.911.312.714.115.617.018.419.821.2
654.87.29.611.914.316.719.121.523.926.328.731.133.435.8
807.210.914.518.121.725.329.032.636.239.843.447.050.754.3
10011.317.022.628.333.939.645.250.956.562.267.973.579.284.8
12517.726.535.344.253.061.970.779.588.497.2106.0114.9123.7132.5
15025.438.250.963.676.389.1101.8114.5127.2140.0152.7165.4178.1190.9
20045.267.990.5113.1135.7158.3181.0203.6226.2248.8271.4294.1316.7339.3
25070.7106.0141.4176.7212.1247.4282.7318.1353.4388.8424.1459.5494.8530.1
300101.8152.7203.6254.5305.4356.3407.1458.0508.9559.8610.7661.6712.5763.4
水管管径-流速-流量对照表 3
0.4m/s0.6m/s0.8m/s1.0m/s1.2m/s1.4m/s1.6m/s1.8m/s2.0m/s2.2m/s2.4m/s2.6m/s2.8m/s3.0m/s
200.50.70.91.11.41.61.82.02.32.52.72.93.23.4
250.71.11.41.82.12.52.83.23.53.94.24.64.95.3
321.21.72.32.93.54.14.65.25.86.46.97.58.18.7
401.82.73.64.55.46.37.28.19.010.010.911.812.713.6
502.84.25.77.18.59.911.312.714.115.617.018.419.821.2
654.87.29.611.914.316.719.121.523.926.328.731.133.435.8
807.210.914.518.121.725.329.032.636.239.843.447.050.754.3
10011.317.022.628.333.939.645.250.956.562.267.973.579.284.8
12517.726.535.344.253.061.970.779.588.497.2106.0114.9123.7132.5
15025.438.250.963.676.389.1101.8114.5127.2140.0152.7165.4178.1190.9
20045.267.990.5113.1135.7158.3181.0203.6226.2248.8271.4294.1316.7339.3
25070.7106.0141.4176.7212.1247.4282.7318.1353.4388.8424.1459.5494.8530.1
300101.8152.7203.6254.5305.4356.3407.1458.0508.9559.8610.7661.6712.5763.4
水管管径-流速-流量对照表 4
0.4m/s0.6m/s0.8m/s1.0m/s1.2m/s1.4m/s1.6m/s1.8m/s2.0m/s2.2m/s2.4m/s2.6m/s2.8m/s3.0m/s200.50.70.91.11.41.61.82.02.32.52.72.93.23.4
250.71.11.41.82.12.52.83.23.53.94.24.64.95.3
321.21.72.32.93.54.14.65.25.86.46.97.58.18.7
401.82.73.64.55.46.37.28.19.010.010.911.812.713.6
502.84.25.77.18.59.911.312.714.115.617.018.419.821.2
654.87.29.611.914.316.719.121.523.926.328.731.133.435.8
807.210.914.518.121.725.329.032.636.239.843.447.050.754.3
10011.317.022.628.333.939.645.250.956.562.267.973.579.284.8
12517.726.535.344.253.061.970.779.588.497.2106.0114.9123.7132.5
15025.438.250.963.676.389.1101.8114.5127.2140.0152.7165.4178.1190.9
20045.267.990.5113.1135.7158.3181.0203.6226.2248.8271.4294.1316.7339.3
25070.7106.0141.4176.7212.1247.4282.7318.1353.4388.8424.1459.5494.8530.1
300101.8152.7203.6254.5305.4356.3407.1458.0508.9559.8610.7661.6712.5763.4
管径流量流速对照表 2
管径流量流速对照表
管径流量流速对照表：
以下是DN15、DN25、DN50管径的截面积计算：
DN15：152*3.14/4=176.625平方毫米，合0.0177平方分米。
DN25：252*3.14/4=490.625平方毫米，合0.0491平方分米。
DN50：502*3.14/4=1962.5平方毫米，合0.1963平方分米。
假设管道流速为4米/秒，即40分米/秒，且1升=1立方分米，则管道的流量如下：
DN15管道：流量Q=0.0177*40=0.708升/秒，合2.55立方米/小时。
DN25管道：流量Q=0.0491*40=1.964升/秒，合7.07立方米/小时。
DN50管道：流量Q=0.1963*40=7.852升/秒，合28.27立方米/小时。
注：必须给定流速才能计算流量，上述是按照4米/秒计算的。
题目分析：
流量为1小时10吨，这是质量流量，应先计算出体积流量，再由体积流量计算出管径，再根据管径的大小选用合适的管材，并确定管子规格。
1）计算参数，流量为1小时10吨；压力0.4MPa，水的流速为1.5米/秒。
2）计算体积流量：质量流量m=10吨/小时，水按常温状态考虑则水的密度ρ=1吨/立方米=1000千克/立方米；则水的体积流量为Q=10吨/小时=10立方米/小时=2777立方米/秒。
3）计算管径：由流量Q=Av=（π/4）*d*dv；v=1.5m/s；得：d=4.856cm=48.56mm
4)选用钢管，以上计算，求出的管径是管子内径，现在应根据其内径，确定钢管规格。由于题目要求钢管，则：
1）选用低压流体输送用镀锌焊接钢管，查GB/T3091-2008,选择公称直径为DN50的钢管比较合适，DN50镀锌钢管，管外径为D=60.3mm，壁厚为S=3.8mm，管子内径为d=60.3-3.8*2=52.7mm＞48.56mm，满足需求。
2）也可选用流体输送用无缝钢管D57*3.0，该管内径为51mm。
自动计算空调水管及冷量管径对应表-office2010以上版本
⾃动计算空调⽔管及冷量管径对应表-office2010以上版本颜⾊说明：
DN20DN25DN32DN40DN50DN56DN65DN80例：
⽔流量M3/H =冷量KW/（4.9*温差5）*1.2系统数*3.6换成M3/H
简化：⽔流量M3/H =冷量KW/24.5*1.2*3.6⾃动计算
⼿动输⼊计算楼层房间编号管段编号
管段流量(m3/H)
管段管径DNmm
内径DNmm
⼀层101.00⾃动计算
0.564244898DN20⾃动计算 1.022693878DN25⾃动计算 2.292244898DN32⾃动计算 3.350204082DN40⾃动计算6.876734694DN50⾃动计算13.57714286
DN80⾃动计算25.92DN100⾃动计算46.19755102DN125⾃动计算
61.71428571
DN125
53
⼿动输⼊计算 1.5DN32⼿动输⼊计算160DN200⼿动输⼊计算500DN300⼿动输⼊计算600
DN350
1RT=3.517KW
管径计算公式⼀dn(⽶)=1.13 * 对应管段⽔流量（⽴⽅⽶/秒）除以⽔流速（⽶/秒）的商的平⽅根管径计算公式⼆dn=0.48 * 对应管段冷量（冷吨）的平⽅根
⽔管管径DN(mm)对应最⼤流
速(m/s)
流量
（m3/s）
流量（m3/h）冷吨冷量46.200048110.001888889 6.8
参考数据可修改、⼿输
⼊计算结果
对应⽔量 m3/h⽔量 l/s冷量 kw⽔温差℃0.5642448980.156734694 3.25
1.022*******.284081633 5.85
2.2922448980.636734694135
3.3502040820.930612245195
6.876734694 1.910204082395
13.57714286 3.771428571775
25.927.21475
46.1975510212.832653062625
管径、流速、流量对照表
管径/流速/流量对照表
管径
(DN) 流量m3∕h
0.4ms 0 6m,s 0.Sms 1.0m s 1 2m∙ s 1.4m s 1.6ms 1 8m, s 2.0ms 2.2ms 2.4m,s 2.6m s 2.8m s 3.0m,S 内面积1
20 0.5 0.7 0.9 1. 1 1.4 1.6 1.8 2.0 2.3 2.5 2.7 2.9 3.2 3.4 0. 000314
25 0.7 1.1 1.4 1.8 2. 1 2.5 2.8 3.2 3.5 3.9 4.2 4.6 4.9 5.3 0. 000491
32 1.2 1.7 2.3 2.9 3.5 4. 1 4.6 5.2 5.8 6.4 6.9 7.5 8. 1 8.7 0. 000S04
40 1.8 2.7 3.6 4.5 5.4 6.3 7.2 8. 1 9.0 10.0 10.9 11.8 12.7 13.6 0.001257
50 2.8 4.2
5.7 7. 1 8.5 9.9 11.3 12.7 14. 1 15.6 17.0 18.4 19.8 21.2 0. 001963
65 4.8 7.2 9.6 11.9 14.3 16.7 19. 1 21.5 23.9 26.3 28.7 31. 1 33.4 35.8 0. 003318
80 7.2 10.9 14.5 18. 1 21.7 25.3 29.0 32.6 36.2 39.8 43.4 47.0 50.7 54.3 0.005027
100 11.3 17.0 22∙6 28.3 33.9 39.6 45.2 50.9 56.5 62.2 67.9 73.5 79.2 84.8 0. 007854
125 17.7 26.5 35.3 44.2 53.0 61.9 70.7 79.5 88.4 97.2 106.0 114.9 123.7 132.5 0. 012272
水管管径-流速-流量对照表(定管径)
0.4m/s0.6m/s0.8m/s1.0m/s1.2m/s1.4m/s1.6m/s1.8m/s2.0m/s2.2m/s2.4m/s2.6m/s2.8m/s3.0m/s200.50.70.91.11.41.61.82.02.32.52.72.93.23.4
250.71.11.41.82.12.52.83.23.53.94.24.64.95.3
321.21.72.32.93.54.14.65.25.86.46.97.58.18.7
401.82.73.64.55.46.37.28.19.010.010.911.812.713.6
502.84.25.77.18.59.911.312.714.115.617.018.419.821.2
654.87.29.611.914.316.719.121.523.926.328.731.133.435.8
807.210.914.518.121.725.329.032.636.239.843.447.050.754.3
10011.317.022.628.333.939.645.250.956.562.267.973.579.284.8
12517.726.535.344.253.061.970.779.588.497.2106.0114.9123.7132.5
15025.438.250.963.676.389.1101.8114.5127.2140.0152.7165.4178.1190.9
20045.267.990.5113.1135.7158.3181.0203.6226.2248.8271.4294.1316.7339.3
25070.7106.0141.4176.7212.1247.4282.7318.1353.4388.8424.1459.5494.8530.1
300101.8152.7203.6254.5305.4356.3407.1458.0508.9559.8610.7661.6712.5763.4
管径和冷量对比表
公称直径（mm）DN20DN25DN32DN40DN50流速（m/s）0.450.50.650.70.9流量（m^3/h）0.5412.253.246.7冷量（kW）3.25.8131939
公称直径（mm）DN200DN225DN250DN275DN300流速（m/s）2.152.332.52.672.82流量（m^3/h）238331450583741冷量（kW）13841925261633904308
公称直径（mm）冷量（kW）冷凝水空调供回水管径和冷量、流量对
一般风机盘管出口是DN2一般空调风机盘管出来供回水管径取DN25
本表对比《全国民用建筑工程DN70DN80DN100DN125DN150DN1751.651.21.451.651.91.9813.3225.25457010816777147262407628970
DN325DN350DN400DN450DN500DN6002.993.05925110053636395
DN25DN32DN401818.1-100101-176冷凝水管管径和冷量对比流量对比
是DN20，因不易变径，故出口接DN20。筑工程技术措施/暖通空调·动力》2009版P100表5.10.6