HTRI simulation warning
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This post was last edited by chenzx on 2025-5-6 at 15:58. Hello everyone, I have a question: When using the HTRI simulation, the following two warnings appear: 1. The temperature effectiveness of this exchanger is greater than 0.9. This type of process conditions requires close to pure countercurrent flow and near perfect flow distribution. (MN 4151) Which translates to: “The temperature efficiency of this heat exchanger is greater than 0.9.” These process conditions require near-pure counterflow and an almost perfect flow distribution. ” What’s the reason for this? Is there a problem? How to eliminate it? Is this temperature efficiency the coefficient of poor performance? Figure 2 shows the calculation of the temperature coefficient, and the result is 0.76. 2. Another issue relates to the opening area of the baffle plates; as shown in Figure 1, what is the cause of this, and how can it be eliminated? Thank you! Management of chemical production processes
This post was last edited by weilongwu on 2025-5-7 07:59. When temperature cross-over occurs, a pure counterflow configuration is required in order to increase the temperature correction factor; otherwise, the heat exchange area will be very large.
Hello, thank you for your reply. There should be no temperature crossover, as convergence is possible in ASPEN. This is the cooling process for the methanol cycle gas. Additionally, if there were a temperature crossover, an error message should appear in HTRI; currently it’s just a warning. I’m not quite sure how to eliminate this warning.