Membrane condensation heat transfer coefficient

This question is difficult to answer. For the specific calculation of the heat transfer coefficient for film condensation, you can refer to manuals; relevant information is available in handbooks on principles of chemical engineering and chemical processing. In practical process engineering, the heat transfer coefficient for film condensation is rarely calculated; what matters to us is the overall heat transfer coefficient. Generally, the heat transfer coefficient of film condensation is relatively high, and it does not constitute a controlling factor in the heat transfer process of heat exchangers. I’m not sure if you’re working on a heat exchanger and trying to find the overall heat transfer coefficient. Currently, there are mainly two methods for calculating heat exchangers. One is to use software, such as BJC, which allows us to view various heat transfer coefficients in the reports. The other method is to utilize existing heat exchangers and scale them up based on known process parameters.

In fact, film condensation is also divided into many cases. When calculating the heat transfer coefficient in process engineering, it is necessary to analyze whether it is a wall surface or a circular tube, whether it is inside or outside the tube, and whether the flow is laminar or turbulent. The situation is different, so the empirical formulas for calculating the condensation coefficient, that is, the analytical solutions, are also different. For the first method, if calculation is required, the person in question can look for textbooks on \"Principles of Chemical Engineering\" from universities, such as those from Tianjin University, East China University of Science and Technology, or Zhejiang University. Or heat exchange manuals, such as the \"Comprehensive Book on Chemical Equipment Design – Heat Exchangers\". This requires some basic knowledge and professional background. The second method is to use software for calculation. Both HTFS and HTRI are excellent heat transfer calculation software. Software for download is available online, and there are also tutorials within Haichuan. Mastering these two software programs can solve almost all types of heat transfer problems, but it also requires a lot of time and effort. The third method is to use process drawing manuals. For example, the \"Handbook of Chemical Process Diagrams\" published by the Chemical Industry Press is a book I really like for performing similar calculations; it can also be downloaded from Haichuan. This is very simple; if one only needs to obtain the data without understanding the principles, this is the fastest way.

I’ve been calculating this all day; thank you for the three methods you provided!