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I want to create a heat exchanger of this type: copper tubes are wrapped around stainless steel tubes, and the large amount of air in between is used to cool the refrigerant inside the tubes. Under the conditions and requirements shown in the figure, how much heat can be cooled down to 35°C?
I recommend a book titled \"Principles of Chemical Engineering\"; the chapter on heat transfer in this book provides a comprehensive explanation of this issue. Your approach lacks many necessary calculation parameters; determining the heat transfer coefficients for each pipe wall and the heat exchange area (from the pipe to the contact surface) is extremely complicated if done manually. There are also the flow rates of two other fluids,,, If two semi-circular flanges are considered to be fitted over the pipe to form a water jacket interlayer, with baffle ribs inside and water flow from the bottom to the top, the result should be better than that of a coiled tube. For reference.
Air-cooled coil, or with a layer of stainless steel tube in between? You’re really talented; it’s just copper tubes for cooling – why not add fins to them in large numbers? By using cooling fins directly, and by using a stainless steel tank, is it because the heat transfer coefficient is too high? It’s a problem related to heat transfer; with such a design, the heat exchange efficiency will be extremely low.
The heat exchange efficiency in this case is not likely to be very good; even with copper tubes, the contact area is too small, so the results will not be satisfactory. It is recommended to use a jacket instead.
After 6 structural prototype improvements, it is now ready for use. Thank you!