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1、四、空调水系统管径的确定 水管管径d由下式确定：4mw3.14 vd =式中mw-水流量, m/s； v-水流速, m/s建议，水系统中管内水流速按表一中的推荐值选用，经试算来确定其管径，或按表二根据流量确定管径。表一、管内水流速推荐值（m/s）管径1520253240506580闭式系统0. 40.50.50.60.60.70.70.90.81.00.91.21.11.41.21.6开式系统0.30.40.40.50.50.60.60.80.70.90.81.00.91.21.11.4管径100125150200250300350400闭式系统1.31.81.52.01.62.21.82.5
2、1.82.61.92.91.62.51.82.6开式系统1.21.61.41.81.52.01.62.31.72.41.72.41.62.11.82.3表二、水系统的管径和单位长度阻力损失钢管管径/闭式水系统开式水系统流量/(m/h)kPa/100m流量/(m/h)kPa/100m1500.5060-200.51.01060-2512106001.3043322410601.32.011404046106024104050611106048-6511181060814-80183210601422-100326510602245-12565115106045821040150115185104782130104320018538010371302001024250380560926200340101830056082082334047081535082095081847061081340095012508176107507124501250159081575010007125001590200081310001230711
