HTRI calculation yields a warning for vertical thermosyphon heat exchangers
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He specified that a vertical e*t height was used in the Dukler Flow Map calculations. For cases with multiple e*t nozzles, the minimum vertical distance of a pipe for which slug flow can occur is 105.355 inches; otherwise, churn flow takes place. Check your actual pipe dimensions. What does this warning mean? Where is the problem?
The main issue is that not many people use the HTRI software; it’s entirely in English, and if errors occur, people may not understand them very well. It’s better to read his instructions carefully and try to enter all the parameters correctly.