When the water pressure is 0.2MPa and the flow rate is 15 cubic meters per hour, what is the pipe diameter?

When the water pressure is 0.2MPa and the flow rate is 15 cubic meters per hour, what is the pipe diameter?

If the water pressure of 0.2MPa is converted into kinetic energy, the speed is 20m / s, the volume flow is 15 m ^ 3 / h, which can be converted into 0.0042 m ^ 3 / s, the pipeline area is 0.0042/20 = 0.00021 m ^ 2 = 210 mm ^ 2, and the pipeline diameter is 16.3mm. Considering the pressure loss, it is almost the same to choose a pipeline of 20 mm

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