7. Conclusion

In order to intensify heat exchange, various methods have been tried and tested, and their effectiveness has been demonstrated. Techniques for modifying the structure of the exchange wall are the most numerous and common: use of fins (surface extension), modification of the wall geometry (promotion of turbulence, mixing). Innovations in microtechnology are opening up even more interesting prospects for controlling the surface state and properties of exchange walls (coatings, nanostructuring). Last but not least, many active techniques are still at the research stage, but offer numerous possibilities for highly targeted applications.

In all cases, care must be taken to ensure that the additional cost of the intensification technique used is effectively offset by a gain in performance, resulting in savings either on the overall investment or on the operation of the...