Why is it not allowed in general industrial production for the water flow rate to exceed 3 m/s?
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What problems occur when the flow speed of water in a pipe exceeds 3 m/s? Some say that a vacuum will be created and water won’t be able to flow out, while others claim that this will accelerate the wear and tear of the pump. I hope some experienced teachers can help students resolve this doubt
This post was last edited by ylb913 on 2016-6-15 at 12:22. The high pressure drop loss, along with the high electricity consumption required by the pumps, are likely the main reasons. By appropriately increasing the pipe diameter and reducing the flow velocity, while incurring higher initial investment costs and lowering operational energy consumption and expenses, there is always a relatively reasonable balance to be achieved. Take circulating water as an example: in our factory, 2 m/s is basically the upper limit for the flow velocity in the main circulating water pipes. For media that cause severe erosion, the flow velocity has to be even lower; otherwise, you’ll constantly face problems such as leaks and the need to replace pipes, which is unbearable. It also increases safety risks and investment costs……
The pipeline resistance loss increases significantly, resulting in high energy consumption and inefficiency
The so-called economic flow rate minimizes the sum of operating costs and equipment costs.
It is not economical; too high a flow rate leads to excessive frictional forces, which increases the requirements regarding the pump’s head pressure, raises power consumption, increases pipeline pressure, and accelerates pipeline wear.
What about the claim that it will be evacuated and unable to release water? Is this view reasonable?
To be honest, I don’t quite understand this statement. But still, thank you
The sum of operating costs and equipment costs is minimized, which means the overall cost is at its lowest. Equipment costs can be understood as a one-time investment, that is, the construction cost, while operating costs can be considered as the expenses for maintenance and operation. Higher equipment investment results in lower operating costs, while conversely, higher operating costs occur. From the perspective of controlling total costs, it is necessary to find a balance between the two. Also, some ads are quite well-made……