The issue of heat transfer resistance due to fouling in heat exchangers.
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Regarding the dirt thermal resistance, reference values are provided in Table F1 of Appendix F of GB151. It was found that the value for seawater is 8.8, while the average value for rivers is 52.8. Why is the value for seawater much lower? Isn’t it true that higher salt content in seawater makes scaling more likely? Please help analyze it. Thank you
The actual K value is the negative reciprocal of the dirt level; calculate it again to see which value is larger
It’s true that the greater the dirt coefficient, the smaller the overall heat transfer coefficient