Flow rate issues in circulating water pipelines
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What is the typical flow rate for circulating water with pipe diameters ranging from 50 to 400?
This post was last edited by cdpulin on 2010-1-13 at 10:54. u=L/(pai*d*d/4); u is the flow velocity, L is the flow rate, and d is the pipe diameter. There’s a problem with your question itself – at the very least, you should know what the flow rate or circulation volume in the pipeline is. Or calculate it by knowing the pump’s flow rate.
A decrease in the circulation water flow rate exacerbates scaling in the heat exchange tubes; at low flow rates, deposits adhere to these tubes, leading to severe sludge formation and corrosion. According to Article 2.1.18 of the \"Code for Design of Industrial Circulating Water Cooling Systems\", the design flow velocity at the starting section of the main water distribution pipe in a tubular water distribution system should be between 1.0 and 1.5 m/s. Article 2.1.19 The trough-type water distribution system shall meet the following requirements: The design flow velocity at the starting section of the main water trough should be in the range of 0.8 to 1.2 m/s ； The design flow velocity at the starting section of the water distribution tank should be 0.5 to 0.8 m/s ；
Determine the pipe diameter based on the flow rate. Your question is backwards. The flow rate is determined based on the user's requirements and the resistance of the piping system. Design institutes prefer to set the circulation water flow rate within the range of 1.5 to 2.5 m/s.