HTRI for calculating heat transfer problems
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I would like to ask: when using HTRI to calculate the condensation of multi-component vapors, since some of the other gases dissolve in water after water vapor condenses, and this dissolution is exothermic, I wonder whether the heat load calculated by HTRI takes this dissolution heat into account. Thank you.
You have thought this through very carefully; I hope an expert can answer.
It depends on the method used to generate the condensation curve data. If the user enters the condensation curve data, and the effect of this heat of solution is already reflected in the data, then it is included. If the condensation curve data is automatically calculated using the library components and thermodynamic methods built into the HTRI software, it depends on the accuracy of the phase equilibrium calculations provided by those library components. If the calculation results based on those built-in library components are suspected to be unreliable, software such as ASPEN can also be used to perform simulation calculations to obtain the condensation curve data, which can then be entered using the method specified by the user.
1. Check whether the heat of solution parameters for the components in HTRI are missing； 2. If relevant data is available in Aspen, the condensation curve can be generated using the method mentioned above and imported into HTRI; 3. If the necessary parameters are not available in the database, obtain them from relevant sources and enter them into the software ； 4. If no data can be found, then it’s necessary to consider how large the heat of dissolution is – whether it can be ignored or if a larger design margin should be used ； The design margin for two-phase flow heat exchangers should originally be set higher.
Just look at the calculated heat value and compare it with the one obtained using Aspen