I would like to know where the value of 0.00041 for the fouling thermal resistance, which is used to determine whether to use 19 or 25 mm diameter heat exchange tubes, comes from

2017-09-26View Original

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The above are screenshots from many versions of the “HTRI5.0 User Manual (Chinese Version).pdf” available online. I’m trying to find a more credible source for the value 0.00041; I’ve searched for it for a long time without success. I would appreciate it if someone could give me some guidance. O(∩_∩)O Thank you

Reply #22024-06-13

Regarding experience values, it is recommended to check the explanations in TEMA regarding the values assigned to the fouling thermal resistance. The basic principle is that with more dirt, a larger pipe diameter makes cleaning easier.

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I would like to know where the value of 0.00041 for the fouling thermal resistance, which is used to determine whether to use 19 or 25 mm diameter heat exchange tubes, comes from

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