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Hello, I'm trying to come up with a method on excel to calculate the required surface area for a heat exchanger for a desired output temperature for a fluid (which can either be a gas or a liquid). I have a lot of familiarity with Heat Exchangers, especially concentric shell and tube.
However, I'm fairly confused about how you calculate the heat transfer coefficient for the shell side fluid. I know that for the tube side, the overall flowrate is divided by the number of tubes to get the individual flowrate in each tube and that is used for calculating the internal heat transfer coefficient in the tubes, my main issue is how to calculate the heat transfer coefficient for the shell side as I don't know what equations to use.
I have done calculations in University that dealt with fluid flow over tube banks but I'm not sure how closely that relates to my problem.
Also, how much would the equations/ method change depending on if its a liquid or a gas such as steam or alcohol vapour. If someone could show me some example calculations for calculating the heat exchange between two fluids in a shell and tube heat exchanger with a bundle of straight tubes I would be very grateful.
I'm looking through Fundamentals of Heat and Mass transfer by Incropera and Dewitt, but in all examples heat transfer coefficient is given and not shown how to calculate for the heat exchangers.
I'd greatly appreciate if someone could tell me the method used and could supply me with some recommend texts with worked out examples and calculations.
Thank you
Dale Brewster
