Tube heat exchangers: the effect of flow rate on heat transfer efficiency
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For a stable convective heat transfer process, if the flow velocity of the hot fluid increases, how should the outlet temperature be recalculated?
Is it the increase in hot fluid flow rate that causes the velocity to increase? Is it a change in structure, with the flow path becoming smaller and thus resulting in an increased flow velocity?
There should be no phase change during the entire heat exchange process. Qualitatively speaking, this means that the temperature at the outlet of the hot fluid increases, the temperature at the outlet of the cold fluid also increases, and the overall heat transfer capacity of the equipment rises. For quantitative calculations, specific data is required, and it is also necessary to consider whether there will be significant changes in the heat transfer coefficient in order to obtain a result.
This post was last edited by wiseboy on 2018-3-21 17:02. All heat exchangers need to be recalculated—because everything has changed.