Assumptions about tube wall temperatures in heat exchanger process calculations

This post was last edited by wiseboy on 2011-7-4 22:09, version 1. Wall temperature is important and is determined. The wall temperature is not just the one you mentioned ； 2. The formula for the steam condensation heat transfer coefficient includes the wall temperature, and the temperatures of the inner and outer walls on the tube side may be used as well ； 3. The radiation of the enclosure to the atmosphere, as well as the convective heat transfer coefficient, take into account the wall temperature at the outer surface of the enclosure (or the outer surface of the insulation layer) ； 4. I have always been about setting up systems of equations and solving them rigorously. One truly needs to understand \"Advanced Mathematics\" and \"Computational Methods\". Key point: In the precise calculation of heat exchangers, there are many wall surfaces and many wall temperatures; it is necessary to solve a system of nonlinear equations, and numerical methods are required, as elementary mathematics is insufficient for this task. Without a solid foundation in university-level mathematics, research and exploration come to an end, and one has to rely on software developed by others for calculations.

Reply to 2# wiseboy: lol Which book has it?

This post was last edited by wiseboy on 2011-7-4 22:32, version 1. Establish the system of equations by yourself. With the fundamentals of heat transfer in place, the system of equations can be established using mathematical methods ； 2. To solve these problems, it is necessary to have a good understanding of Advanced Mathematics, as well as to study *Computational Methods (mathematical methods on computers). It is only at this time that we realize the power of mathematics, and that we must never hand mathematics back to the math teachers. Key points: 1. The methods presented in \"Principles of Chemical Engineering\" are never \"thoroughly revolutionary\" or fully exposed, as it is a foundational course that teaches basic concepts ； 2. With only \"Principles of Chemical Engineering\" in hand, you will always only understand the general principles.

Reply to 4# wiseboy: You can’t possibly set up mathematical equations manually every time you need to perform a calculation, right? It would be great if there were small calculation formulas available, like in a little software program!

This post was last edited by wiseboy on 2011-8-24 at 16:13. I have turned them into a unified, complete model and developed a unified Newton-Raphson method for solving it. However, it is not a small software program; it is rather a minor component within the entire heat exchanger software.