Some issues regarding plate-fin heat exchangers
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1. Calculation formulas for the geometric properties of various fins in plate-fin heat exchangers. For example, what are the common geometric properties for rectangular and triangular cross-sections? What is the calculation formula then? 2. What are the formulas for calculating the physical properties when the hot fluid is an ethylene glycol aqueous solution at a certain percentage? 3. What are the calculation formulas for parameters such as the heat transfer factor and friction factor?
I hope those who are familiar with these issues can offer me some guidance; I would be extremely grateful!
The calculations for plate exchangers vary from manufacturer to manufacturer
Although there are differences among various manufacturers, there must be some unified reference formulas or sources. If you know them, I would appreciate a detailed explanation. Thank you!
1. The unified geometric properties are wing span, wing height, and wing thickness; based on these, the cross-sectional area and equivalent diameter of the flow channel can be calculated. 2. For the ethylene glycol mixture, the user can use the Aspen software to calculate the physical property parameters based on the ratio of various components in the mixture. 3. The heat transfer factor j = Nu/(RePr1/3); the friction factor f varies depending on the type of fins, with each manufacturer having its own empirical formula