I’m a beginner; when working on the design of heat exchangers using optical tubes and heat pipes, what does iterative calculation mean?
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I’m a beginner. When designing a tube-in-tube heat exchanger, I selected values for the flue gas mass flow rate and the heat transfer coefficient during the estimation phase; after performing the precise calculations, a value for the heat transfer coefficient is obtained, and these values then need to be used in iterative calculations. I would like to ask what the basis for iterative calculation is, and how to determine the correct result
It means taking the data you have calculated and feeding it back into the original design process to recalculate it again. The heat exchange area is determined through a process in which assumptions are made, values are confirmed, results are obtained, and then those results are verified; if the verification fails, adjustments are made again
It is sufficient for the calculation results to be close to the initial assumed values to a certain extent. To a certain extent, this depends on your tolerance; when my software performs the calculations, the relative error is less than 0.01%