Trade-offs between flow pattern adjustment and its impact on heat transfer margin in HTRI

2021-09-29View Original

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The flow patterns in HTRI shell-and-tube heat exchangers are divided into five zones: A, B, C, E, and F. The respective ranges are: A < 0.2, with A < 0.1 being preferred； B＞0.6 ； C<0.1 ； E<0.15 ； F≈0. Adjusting the ratio of the gaps in the baffle plates and the spacing between them can effectively increase the percentage of B flow pattern and reduce the percentage of E flow pattern, thereby bringing the flow pattern distribution closer to the desired requirements. However, the margin of safety for heat exchangers of the same size is significantly reduced. So, when adjusting the ratio of gaps in the baffle plates and their spacing, is it better to achieve a flow pattern distribution that meets the desired requirements or to maintain a larger margin of safety for the heat exchanger?

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Trade-offs between flow pattern adjustment and its impact on heat transfer margin in HTRI

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